3. Introduction
âThe science of implantology is highly dynamic. Ever since its
introduction into the field of dentistry by Dr. Branemark, it has
undergone numerous modifications and improvements.
âWith each improvement and advancement made, implantology
has proved to be a boon in disguise to the society
4. Contents
âAdvances in Diagnostic imaging
âRecent advances in Implant design
âAdvances in Implant materials
âAdvances in commercially available implant systems
âSoftware simplifying treatment planning
âRecent advances in Implant Abutments
âImplant -Abutment connection
âNew concepts in Implant rehabilitation
âConclusion
âReferences
6. Imaging
Phase 1: Pre-
prosthetic implant
imaging
Phase 2: Surgical
and interventional
implant imaging
Phase 3: Post-
prosthetic implant
imaging
Determines the
⢠Quantity, quality, and
angulation of bone;
â˘Relationship of critical
structures to prospective
implant sites
⢠The presence or absence of
disease at the proposed
surgical sites.
Evaluates the
surgical sites during
and immediately
after surgery
Evaluates the long-term
change
⢠Crestal bone levels around
each implant
⢠Changes in mineralization or
bone volume.
7. ZONOGRAPHY
âA modification of the panoramic x-ray machine for making
cross sectional images of the jaws.
âThe tomographic layer is approximately 5mm.
âFor appreciation of spatial relationship between the critical
structures and the implant site.
Limitations:
â˘Tomographic layers relatively thick .
â˘Adjacent structures blurring and superimposition.
â˘Not useful for determining the differences in
bone density or for identifying disease at implant
site.
8. Tomography
âTomography is the generic name formed by the greek
words âtomoâ(slice) and âgraphyâ(picture).
âEnables visualization of a section of patientâs anatomy by
blurring other regions above and below the site of interest.
âFor dental implant patients, high quality complex motion
tomography is required.
9. Computed tomography (CT)
âCT was invented by Sir Godfrey Hounsfield and was introduced in
1972.
âComputed tomography (CT) is a digital and mathematical imaging
technique that creates tomographic sections and allows soft tissues
and hard tissues to be visualized simultaneously
âIdeally, tomographic sections spaced 1 to 2 mm enable evaluation of
implant site and 3D appearance of alveolus
âWith latest CT scanners, images with sectional thickness of 0.25 mm
can be obtained
10. The advantages of CT based systems are
âUniform magnification
âHigh contrast image with well-defined image layer, free of
blurring
âEasier identification of bone grafts or hydroxyappatite materials
used to augment maxillary bone in sinus region
âMultiplanar views
âThree-dimensional reconstruction
âSimultaneous study of multiple implant sites
âAvailability of soft tissue for image analysis
11. Disadvantages
âLimited availability of reconstructive software
âHigher dose of radiation
âLack of understanding of dentists
âLack of usefulness for implant interface follow-up because of
metallic streak artifacts
âExpense
12. Recent advances in Computed Tomography(CT)
Tuned Aperture CT (TACT)
âTuned aperture computed tomography (TACT) by Webber is a
relatively simple, faster method for reconstructing tomographic
images
âIt is based on the concept of tomo-synthesis and optical-aperture
theory
âTACT uses 2-D periapical radiographs acquired from different
projection angles as base images and permits retrospective
generation of longitudinal tomographic slices (TACT-S) lining up in
the Z axis of the area of interest
13. â The overall radiation dose of TACT is not greater than 1 to 2 times
that of a conventional periapical X-ray film.
âThe resolution is stated to be similar with 2-D radiographs.
â Artefacts associated with CT, such as starburst patterns seen with
metallic restorations, do not exist with TACT.
16. âSoftware programs incorporating sophisticated
algorithms including back-filtered projection are applied
to these image data to generate a 3D volumetric data set,
which can be used to provide primary reconstruction
images in 3 orthogonal planes (axial, sagittal and coronal).
âCBCT is devoted to maxillofacial area to scan and
visualize jaw bone lesions especially cancellous bone
âIt gives all the information of a CT but, at 1/8th the
radiation dose and at a lower cost
17. âCBCT is categorized into large, medium, and limited volume units based on the size
of their field of view (FOV)
Large (FOV)
⢠15-23 cm
⢠Maxillofacial
trauma
⢠Orthodontic
use
⢠TMJ diseases
Medium FOV
⢠10-15 cm
⢠Mandibulo-
maxillary
imaging
⢠Pre-implant
planning
⢠Pathology
Small FOV
⢠< 10 cm
⢠Endodontic
applications
18. Advantages of CBCT
âX-ray beam limitation
âImage accuracy
âRapid scan time: 10â70 seconds
âSoftware can be made available to the user
âDose reduction :Effective dose is 98% smaller than conventional CT
âReduced image artifact
19. Interactive computed tomography(ICT)
â˘This technique enables transfer of the imaging study to the
clinician as a computer fileâŚ.
â˘The clinicianâs computer becomes a diagnostic radiologic
workstation with tools
â˘An important feature of ICT is that the clinician and radiologist can
perform âelectronic surgeryâ (ES)
20. ⢠With an appropriately designed diagnostic
template, ES can be performed to develop
the patientâs treatment plan electronically in
3 dimensions.
â˘Transfer of the plan to the patient at the
time of surgery can be accomplished by
production of the computer generated,
three-dimensional stereotactic surgical
templates
21. Recent advances in
Computed Tomography(CT)
Microtomograph:
Modification of CT, it is specially useful in acquiring serial sections of bone
implant interface.
Multi slice helical CT:
The helical CT scan takes continuous pictures of the body in a rapid spiral motion,
so that there are no gaps in the pictures collected.
23. Mini implants
âMini dental implants (MDIs) are small diameter dental implants.
âAre sometimes referred to as SDIs (small diameter implants), as
well as NDIs (narrow body implants).
âDiameter: 1.8mm to 2.9mm (less than 3mm)
âVarious lengths: 10, 13, 15 & 18 mmâs
24. âThe MDI are available with either an O-ball head for use with
removable or fixed dentures, or a square head for fixed prostheses or
retrofitting a poorly adapted partial denture
âThe body connects the tip with the prosthetic head and can be a
parallel sided cylinder or a progressively tapered cone
âA small pilot bit is used to create the opening for the implant to be
threaded into the bone.
âThe definitive implant supported crowns are usually delivered
within 2 weeks of surgery
25. Advantages
âImmediate loading,
âCan be inserted in minimal tissues without relying on grafting
techniques
âMinimally invasive procedure
âOne-stage denture stabilization
âDoes not require osteotomy
âCost-effective
âCan be placed with a simple technique in patients with ridge too
narrow for conventional implants
â.
26. Narrow-diameter implants: Are they a predictable
treatment option? A literature review
JosĂŠ-Luis Sierra-SĂĄnchez Med Oral Patol Oral Cir Bucal. 2014
Jan 1;19 (1):e74-81.
âThe review included
âFour randomized clinical trials
âTen prospective studies
âSeven retrospective studies
âThe follow-up periods -12 months to 12 years.
âTotal of 1607 patients
âThe patient age - 13 to 87 years
â2980 implants
27. âThe recorded implant survival rates were above 90% in all the
studies. Six studies published a survival rate of 100% at the end of
the follow-up period
âThe lowest survival rate (90.9%) corresponded to the study
published by Barter et al.
â58 failures (implant loss) were recorded out of a total of 2980
implants
âA larger number of failures were recorded with implants measuring
⤠13 mm in length
âNineteen studies measured changes in peri-implant bone height
after implant loading :0.065 mm the first year to 1.74 mm after a
follow-up period of 10 years
28. âAraujo published a retrospective study on 3.3 mm implants placed
in posterior areas and rehabilitated following an immediate loading
protocol.
ďImplant survival rate was 95.5% after 9 years of follow-up.
âThat same year, Degidi et al. published a study comparing delayed
and immediate loading in narrow-diameter implants placed in both
anterior and posterior zones.
ďSurvival rate was 99.4% after a mean follow-up of 20 months.
29. TRANSITIONAL IMPLANTS
âDiameter ranges -1.8 to 2.8 mm
âLength -7mm to 14mm.
âFabricated with pure titanium in a single body with treated
surface.
âPrimary function is to absorb masticatory stress during healing
phase
âThey should be placed at least 1.5 mm from adjacent teeth and
the distance between any transitional implant and a definitive
implant must be at least 1.5-2 mm
30. âThe abutment head generally has a 5 degree taper, which makes it
optimal for retention of cement retained prostheses.
âOnly one drill, a 1.5 mm or 2 mm twist drill is required for
placement of the implants.
Advantages :
ďźProvisionalisation of fully and partially edentulous jaws
ďźUndisturbed healing of bone grafts
ďźEffective way to generate aesthetic transitional appliances
ďźAllows evaluation of phonetics and function.
ďźCost effective.
31. One â Piece Implants
âThe implant is machined from a piece of titanium that
incorporates both the implant body and an integral fixed abutment
in a single component.
â3 diameters -3.5, 4.3, and 5 mm
â 4 lengths -10, 13, 15 and 16 mm
32. Clinical and radiographic evaluation of one-piece implants
used for immediate function
Jack a. Hahn, journal of oral implantology vol. 33(3)2007
âThe aim of the present research was to evaluate the radiographic
outcome of a 1-piece implant when used for immediate function in
an ordinary patient pool
âForty-seven NobelDirect and NobelPerfect 1-piece implants
(Nobel Biocare, Go¨teborg, Sweden) were placed in maxillae and
mandibles.
33. âIn this study 1 of the 47 implants had to be removed, resulting in a
cumulative implant survival rate of 97.9% throughout the follow-up
period
âThe mean marginal bone level relative to the reference point after
1 year of loading (0.78 - 1.60 mm), as well as after 2 and 3 years of
loading, was located above the first implant thread
âIn this study, a bone level 2 mm apical to the reference point after
1 year of loading was observed at 2 implants (6%).
34. âThe 1-piece implant design enables undisturbed healing
of the peri-implant soft tissue and avoids disruption of the
soft tissue seal when placing the definitive prosthetic
restoration.
âAnnibali, et al reported a series of patients treated
consecutively for first molar replacement according to :
â Immediate = group 1,
â Early = group 2
â Late = Group 3
The implant survival rate:
91.7% for early implants
95.0% for immediate post-extraction
implants
100% for implants placed in healed
sites.
35. Short Dental Implants
âA dental implant with length of 7 mm or less. (Friberg et al. 2000)
âAny implant under 10 mm in length referred to as a ââshortââ
implant (Griffin TJ, Cheung WS. 2004)
âA device with an intra-bony length of 8 mm or less. (Renouard
and Nisand 2006)
Indication :
Atropic Jaw
Proximity to vital structure
Single crowns
Overdentures
36. Advantages:
1. Bone grafting for height often unnecessary
2. Less money, pain, and time prior to restoration of the implant.
3. Simplified bone surgery.
4. Implant insertion easier.
37. âGoodacre, et al in 2003 reviewed ,
ď2,754 implants - <10 mm
ď3,015 implants - >10 mm in length.
âThe failure rate of implants 10 mm or less was 10%, compared
to a 3% failure rate of implants longer than 10 mm.
âIvanoff, et al in 1999 found an 8-mm-long, 5-mm-diameter
implant failed 25% of the time in the maxilla and 33% of the
time in the mandible. On the other hand, the 10-mm and 12-
mm implants that were 5 mm in diameter reported no
mandibular failure and a 10% failure in the maxilla.
Misch CE Short Dental Implants: A Literature Review and Rationale for Use Dent Today. 2005 Aug;24(8):64-6, 68
38. âOn the other hand, a retrospective report by Misch, et al was compiled
from 2 private offices using a square thread implant body design
(BioHorizons) rather than a v-shaped thread as primarily reported in the
previous literature.
âDuring a 3-year period, 126 patients received implants less than 10 mm
long
âOf the 437 implants there were 3 implant failures in the posterior
mandible and 1 failure in the posterior maxilla (99% survival)
âAll these failures were implants 9 mm long and 4 mm in diameter.
41. âPreviously implants had macro-irregularities like macroscopic
threads, fenestrations, pores, grooves, steps, threads, or other
surface irregularities that were visible.
âHowever, difficulty in achieving initial stability, post implantation
relative motion, adverse interfacial bone remodelling all lead to
search for improvement of the surface quality of a titanium dental
implant
42. BLASTING
âBlasting -aluminium oxide, titanium oxide and calcium phosphate
with particle size ranging from small, medium to large (150- 350
Âľm)
âBlasting a smooth Ti surface with Al2 O3 particles of 25 Âľm, 75 Âľm,
or 250 Âľm produces surfaces with roughness values of 1.16 to 1.20,
1.43, and 1.94 to 2.20, respectively.
âA series of investigations have demonstrated a firmer bone
fixation of the implant with an average surface roughness (sa) of 1-
1.5Âľm than those of smoother implants with an average surface
roughness of 0.6Âľm
43. Blasting and Acid Etching
âAcid etching can be done by using an HCL/ H2 SO4 mixture or by
pickling in 2% HF/10%HNO3 . These processes leave pits and craters.
âAlumina or TiO2 for blasting the surface:
âSmall - 25Îźm
âlarge grit -0.25-0.5mm
âmedium grit - 250-500Îźm
âSand blasted and acid etched surfaces have a hydrophobic surface.
44. âThe etching leads to the formation of Titanium hydrides and the
replacement of hydride by oxygen results in the slow transformation of
the implant surface, resulting in nanometre sized particles of titanium on
the surface, which helps in protein adhesion on implant surface
âDual acid etching with HCl and H2SO4 heated above 100á´źC has
produced surface topography able to attach to fibrin scaffold and
promote adhesion of osteogenic cells.
âSand blasting and etching can increase the rate and amount of the
bone formation
45. Flouride Surface Treatments
âThis treatment enhances osseointegration and osteoblastic
differentitation with increased expression of Cbfa1, osterix and
bone sialoprotein
âFluoridated rough implants also withstood greater push-out
forces and showed a significantly higher removal torque than
control implants
âHowever, detrimental effect of F on the corrosion resistance of
titanium and titanium alloys has been extensively reported
46. Anodized Surface Implants
âAnodized surface implants are implants which are placed as anodes
in galvanic cells, with phosphoric acid as the electrolyte and current is
passed through them â also c/a âTiunite surfaceâ
âThe surface oxides grow from the native state of 5nm to
approximately 10,000nm
âThe sa of TiUnite is reported to be 1.1Âľm and its sdr 37%
âAnodic oxidation results in the growth of a native titanium oxide
layer and a porous topography, with the bone formation occurring
directly on the moderately rough oxidized surface
47. Clinical and Radiographic Evaluation of BrĂĽnemark Implants with an
Anodized Surface following Seven-to-Eight Years of Functional Loading
David Gelb , Bradley McaAllister et al Int J Dent. 2013; 2013: 583567
âThe aim of this study was to evaluate the clinical and
radiographic long-term outcomes of dental implants with an
anodized TiUnite surface, placed in routine clinical practice.
38 single
prosthesis
22 FPDs
80
implants
in maxilla
27 in
mandible
Mean marginal bone level change-
1.49 Âą 1.03 mm
90.7% of cases- no visible plaque
9.3% -visible plaque
No prosthetic complication
48. âCalandriello evaluated immediately placed anodized
implants in 33 patients and found a mean marginal bone
loss of 1.17âmm after 5 years
âFriberg and Jemt compared 280 TiUnite implants to 110
machined implants in 111 patients and found marginal
bone loss after 5 years to be 0.75 and 0.6âmm, respectively,
with no significant difference between the two types of
implants.
49. Laser etching and Micro Arc Oxidation
âAfter the implants are ultrasonically cleaned, they are laser etched
by using an Nd:YAG laser at a power of 50kw, frequency of 7.5khz
and 16.4A current.
âThey are then processed in an electrolyte solution with 3.5%
glyceroposphate disodium salt pentahydrate and 1.2% calcium
acetate monohydrate by microarc oxidation (voltage 350v,
frequency 800hz) for 15 seconds
âMicroarc oxidation produces a titania film with a porous structure
and micropores of 1-5Âľm
âThe mechanism of osseointegration of the oxidized implants has
been shown to be mechanical interlocking and biochemical
bonding
50. Surface coating :Ti Plasma Spray
âPorous / rough Ti surface have been fabricated by plasma
spraying a Ti powder form of molten droplets at high temperature
at temperature in order of 15000ď°C, at 600m/s
â The Ti plasma spray after solidification often provides 0.04 â 0.05
mm thickness.
âTi A spray has been reported to increase the surface area of bone
to implant interface (as much as 600%) and stimulate adhesion
osteogenesis
51. âAdvantages:
ďśEnhance attachment by increasing ionic interactions
ďśIncreased load bearing capability by 25%-30%
ďśIncreased tensile strength through ingrowth of bony tissues into 3D feature
âDisadvantages
ďś Cracking and scaling of coating because of stresses produced by elevated
temprature processing
ďśRisk of accumulation of abraded material in the interface zone during
implantation of TPS
52. Hydroxyapatite coatings
âHydroxyapatite [Ca10(PO4)6OH]2 coating was brought to the
dental profession by DeGroot
âHA forms a strong chemical bond with bone due to the presence
of free calcium and phosphate compounds at the implant surface
âThe HA coating consists of amorphous and crystalline forms with
a large density of cracks.
âThe top 1-2 Âľm of the HA layer being amorphous, while the rest
of the crystalline layer is hexagonally packed
53. âIndicated: Fresh extraction sites.
Newly grafted sites.
Advantages :
1. Protection of surrounding bone against metal ion release from the
substrate.
2. Reported chemical bonding between HA and living bone-intimate
contact-biointegration
3. Partial dissolution of HA makes surrounding fluid rich in calcium
and phosphate ions which trigger cellular differentiation and bone
formation
54. Disadvantages:
â Induction of impurities due to thermal decomposition during
processing- affecting long term clinical fixation
â Dissolution of HA at lower pH
HA coating on the implant surface (50-70Âľm) by various methods
1. Plasma spraying
2. The vacuum deposition technique(ion beam sputtering, radiofrequency
sputtering)
3. The sol gel and dip coating method
4. Electrolytic process
55. Nanotitania coatings
âNanotitania coatings were prepared by using the sol-gel
technique
âNanotitania implants had an increased feature density and a large
feature coverage area as compared to the nano-HA implants.
âThis could present more binding sites for the protein cell
attachment and for increased bone contact
âhe Nanotitania implants exhibited an ordered arrangement,
forming a homogenous layer on underlying topography
56. Biologically active drugs incorporated dental
implants
âBisphosphonates :Bisphosphate-loaded implant surfaces have
been reported to improve implant osseointegration.
âSimvastatin:
âSimvastatin, could induce the expression of bone morphogenetic
protein (BMP) , mRNA that might promote bone formation and
increase bone mineral density
âGentamycin along with the layer of HA can be coated onto the
implant surface which may act as a local prophylactic agent along
with the systemic antibiotics in dental implant surgery
58. Biochemical Methods of the Surface
Modifications
âTheir goal is to immobilize proteins, enzymes or peptides on
biomaterials for the purpose of inducing specific cell and tissue
responses,
1. One approach uses cell-adhesion molecules like fibronectin,
vitronectin, Type I collagen, osteogenin and bone sialoprotein
2. The second approach uses biomolecules with osteotropic
effects which range from mitogenicity (interleukin growth
factor-I, FGF-2, platelet derived growth factor âBB) to the
increasing activity of the bone cells, which enhances the
collagen synthesis for osteoinduction
59. Zirconia implants
Zirconia (Zr02) is a ceramic material used in implantology because:
âBiocompatibility(bio inert)
âEsthetics (because its colour is similar to the teeth), and
â Mechanical properties, which are better than alumina.
âHigh resistance to corrosion, flexion, and fracture
âContact with bone and soft tissue similar to that observed in
titanium implants
âIt can be used to produce a entire implant or as a coating.
60. Advantages of Zirconia Dental Implants
âNo dark colour of the metal showing through the gums
âNo corrosion of the zirconia as with titanium
âNo piezo-electric currents between dissimilar metal in
the mouth
âIt is thermally non-conductive
âGreater BIC (Bone â Implant Contact)
â20% more bone apposition than titanium implants
Zeynep O¨ zkurt ,Zirconia Dental Implants: A Literature Review Journal of Oral Implantology Vol. 37(3)2011
61. âRTQ (removal torque testing): Gahlert et al evaluated the RTQ values of
machined zirconia implants, sandblasted zirconia implants, and SLA titanium
implants. The mean RTQ for machined zirconia implants was 25.9 N/cm, the
mean RTQ for zirconia rough implants was 40.5 N/cm, and the mean RTQ for
SLA titanium implants was 105.2 N/cm
âFracture strength : within clinically acceptable limits
âStress analysis: . Kohal et al observed the stress distribution patterns of
zirconia implants (ReImplant), which were found to have low, well distributed,
and similar stress distribution compared with titanium implants
62. PEEK implants (poly etheretherketone)
âThese implants are available in three fundamentally different
designs;
âTAU : Diameter -4..8 mm ; lengths :10 , 12.5 ,15 mm
immediate loading possible
Low density bone
âTHETA : Similar to TAU but D1 bone
âIOTA : It is a 3mm diameter implant (10 and 12 mm)
used in narrow ridges
63. Advantages:
âGood strength,fracture resistance and bioinertness
âPromotes human oseteoblast cell growth
Disadvantages:
âFaintly radiopaque âdifficult for post-op evaluation
âLengths and diameters range is restricted
66. LASER- LOK TECHNOLOGY
âUnique surface characteristics
âLaser-Lok microchannels is a series of cell-sized
circumferential channels that are precisely created using
laser ablation technology.
âExtremely consistent microchannels that are optimally
sized to attach and organize both osteoblasts and
fibroblasts.
â Includes a repeating nanostructure that maximizes
surface area and enables cell pseudopodia and collagen
microfibrils to interdigitate with the Laser-Lok surface.
67. Biologic response :
âThe inhibition of epithelial downgrowth and the attachment of
connective tissue (unlike Sharpey fibers).
âThis physical attachment produces a biologic seal around the
implant that protects and maintains crestal bone health.
âMore effective than other implant designs in reducing bone loss.
âThe Laser-Lok surface has been shown in several studies to offer a
clinical advantage over other implant designs to reduce bone loss
by 70% .
68. NobelReplace⢠Tapered Groovy implant
âNobelReplace⢠Tapered Groovy implant is shaped to resemble a
tooth root.
âNew and unique grooved threads
â Since bone forms more rapidly in the grooves, the Groovy
implants integrate faster
âTapered design makes surgical procedure exceptionally simple
and predictable â especially for immediate placement after
extraction.
69. Indications
âFor immediate placement after extraction.
âWhenever immediate or early loading is applied.
Advantages of groove pattern
âFaster integration with grooves
âBone formed preferentially within the grooves, compared to
other parts of the implant
âEnhanced osseoconductive properties of the grooves and a
guiding effect on bone forming cells
âUp to 30% increase in stability
70. The NobelSpeedy⢠implant
Features:
âParallel walled implant
âSlightly tapered design
âTiUniteÂŽ surface provides accelerated osseointegration over
machined surface implants .
âNarrow tip makes it perfect for flapless surgery
â Primary stability at time of implant placement.
âShortening treatment time and speeding recovery
71. âThe innovative implant tip is sharp so the implant works as an
osteotome.
âThis feature allows variable, and if needed, extensive under-
preparation of the site.
âThe resulting higher initial stability, especially in soft bone,
supports immediate function.
âThe sharp tip also secures a smooth insertion
âIt provides the possibility to increase torque and place the
implant further down without repeating the drilling procedure
72. NobelSpeedy⢠Replace
âNarrow Tip ,Sharper Chamfers
âInternal Abutment Connection
âSlightly Tapered
âTiUniteÂŽ all the way up
âExtremely Short Drill Protocol
âGrooves on threads
âIncreased initial stability in soft bone
73. NobelSpeedy⢠Groovy
âSame benefits as NobelSpeedy⢠Replace.
In addition:
âExternal Abutment Connection
âIncluding Shorty implant
NobelSpeedy⢠Shorty (7mm)
74. NobelActive⢠Implant
âNobelActive⢠implants do not cut through bone like
conventional implants, they gently press through it like a corkscrew.
âThis bone condensing capability delivers high initial stability.
âThe narrow neck is designed to preserve marginal bone and
promote long-lasting soft tissue stability.
âThe self-drilling ability of NobelActive⢠implants allows it to be
inserted into sites prepared to a reduced depth
75. âThis is useful where sites are close to vital anatomical
structures: the mandibular nerve canal or the maxillary
sinus, and nose cavity.
âImmediate placement in the esthetic region, even when
buccal bone plate is very thin
âExcellent stabilization in wide sockets
76. NobelPerfectâ˘
âNobelPerfect⢠is a unique, anatomically designed implant for
esthetically demanding areas from premolar to premolar.
âThe interproximal bone may be preserved in situations where the
three-dimensional ridge topography results in a height discrepancy
between the facial and interproximal aspect of the osteotomy.
âScalloped soft tissue apposition area allows for the development
of the biologic width around the entire neck of the implant.
â Scalloped prosthetic table follows three-dimensional soft tissue
topography
77. The NobelPerfect⢠One-Piece implant
âThe NobelPerfect⢠One-Piece implant is machined from a single
piece of titanium.
âThe scalloped TiUnite surface contour at the implant neck follows
the same principles as for the original NobelPerfectâ˘.
âWith this design, the soft tissue is supported entirely by the
implant body, irrespective of the shape of the osseous ridge.
78. NobelDirect Implant
The NobelDirect Groovy implant features a revolutionary new one-
piece design that is
âUser-friendly,
âCost-effective,
â Biologically sound and
â Esthetically stable.
âThe implant is machined from a single piece of titanium,
incorporating both the implant body and an integral fixed
abutment.
79. Astra Tech implant system
âOsseoSpeed⢠-chemically modified titanium surface,
âProviding unique nano scale topography
âStimulates early bone healing and speeds up the bone healing
process.
âThe result of the micro-roughened titanium surface treated with
fluoride is increased bone formation and stronger bone-to-implant
bonding.
80. MicroThreadâ˘
âThe neck of Astra Tech implants are designed with MicroThread
that has minute threads that offer optimal load distribution and
lower stress values.
81. âConical Seal Design⢠a strong and stable fit
âConical connection below the marginal bone level transfers the
load deeper down in the boneâŚâŚ.
âReduces peak stresses and thereby preserves the marginal bone.
âSeals off the interior of the implant from surrounding tissues,
minimizing micro-movements and micro-leakage
82. Straumann SLActive implant
âChemical modification to a sandblasted, large-grit, acid-
etched (SLA) implant surface.
âHyrdophilicity
âProtein adsorption
âEnhanced osteoblast activity within the first weeks
âEnhanced angiogenesis and bone healing within the first
few days after contact with the new surface.
âThis surface reduced the average healing time from 12
weeks (TPS surface) to only 6-8 weeks.
83. Straumann Roxolid Implant
âRoxolidÂŽ is a homogenous metallic alloy composed of the
elements titanium and zirconium.
âHigher tensile strength compared to pure titanium.
âImportant when small diameter implants are chosen due to their
reduced size.
âRoxolidÂŽ and SLActiveÂŽ combine high strength with excellent
osseointegration.
âRoxolidÂŽ implants have been used where 3.3mm titanium
implants previously were not suitable.
85. SimPlant software
âSurgi Guides are computer-generated drilling guides that are
fabricated through the process of stereolithography.
âThe SurgiGuide concept is based on the presurgical treatment
planning using SimPlant software for ideal implant positioning.
âThese successive diameter surgical osteotomy drill guides may be
either bone, teeth, or mucosa-borne.
86. âSurgi Guides have metal cylindrical tubes that correspond to the
number of desired osteotomy preparations and specific drill
diameters.
â The diameter of the drilling tube is usually 0.2mm larger than the
corresponding drill, thus making angle deviation highly unlikely.
87. NobelGuide
NobelGuide is a complete treatment concept for
âDiagnostics,
â Prosthetic-driven treatment planning and
âGuided implant surgery â for a single missing tooth to an
edentulous jaw.
88. NobelClinician Software
âNobelClinician Software is the next generation software for
Digital diagnostics and Treatment planning.
âThrough various pre-defined workspaces any DICOM file can be
reviewed and analyzed.
âIt combines a patient's detailed clinical information with 3D
radiographic data into a sophisticated virtual environment.
89. CAD/CAM in implant dentistry
Uses
âUsed in designing of prosthesis
âUsed in milling /fabrication of prosthesis(framework)
âFor milling of abutments.
Advantages:
âSuperior fit
âLess degree of rotational freedom so more accurate implant
abutment connection.
93. Angled abutments
âUsed to improve the path of insertion of prosthesis or final
esthetic result
âFabricated in 2 pieces - so weaker in design
âImplant placed at an angle requires angled abutment
âInclination range from 10-350
âHas 12 facets & 12 positions of angulation in a 3600 circle
âHas non rotating interface with implant
94. UCLA ABUTMENT
âDesigned by JohnBeumer, Wynn Hornburg, and Peter E. Staubli
âIt fits directly on top of either the implant fixtures intraorally or
the laboratory implant fixture analogues
âIt is a plastic castable sleeve.
âMade to simplify the complicated prosthetic rehabilitation of
Nobel Biocare implant.
âThis abutment is available for all implant systems
95. Advantages
âSubgingival placement of the restoration
âHelps with interocclusal distance limitations
âImproved esthetics
âMore apical position only allows the emergence profile through
the soft tissue and natural in appearance
âCan be in porcelain instead of the usual titanium
cylinder
96. Ceramic abutments
âDensely sintered high-purity alumina (al2o3) ceramic
âYttria (Y2O3) -stabilized tetragonal zirconia polycrystal
ceramics
Alumina abutments :
âFlexural strength of 400 mpa
â A fracture toughness value between 5 and 6 mpa â m0.5
â Modulus of elasticity of 350 GPa
97. Advantages
âEasier to prepare intraorally
âLess whitish than zirconia abutments
The problems
âRadioopalescence at the time of radiographic examination
âWeak resistance to fracture
Zirconia abutments
âTwice the flexural strength of alumina ceramic -900â1400 mpa
â A fracture toughness of up to 10 mpa â m0.5,
âModulus of elasticity value -210 gpa
98. Advantages :
âPerfect aesthetics and stability
â Outstanding anatomical design
â Dual concept: titanium base / ZrO2 abutment
â Highest precision of fit
Indications:
âFixed restorations, single crowns and bridgework.
99. CERADAPT ABUTMENT
âAll ceramic alternative to metal abutments
âPre machined precision milled abutment made to fit the implant
hex - made up of densely sintered 99.8% pure aluminium oxide
âIt is a non metallic , non corrosive , bio compatible
âSoft tissue response is excellent
âTooth coloured and light diffusion property
âUsed for implant supported single and multiple tooth restoration
in the anterior canine and premolar regions
âThe CerAdapt abutment is a cylinder of 12 mm high and 6 mm in
diameter
100. âIndications
1. An implant placed too superficially,resulting in exposed Ti at
the buccal aspect
2. An implant with excessively buccal placement & thin peri-
implant mucosa -"shining-through" effect of the Ti abutment
3. A slight disangulation of the implant, resulting in a need to
correct the direction of the implant pillar to create a
harmonious embrasure & anatomy of the crown restoration
101. Multi-Unit abutment
âServe as a one-piece abutment.
âAvailable in 7 lengths for each platform, from a 1-to 9-mm collar
âTotal height of multi-unit abutment, including the gold cylinder
& the unigrip prosthetic screw is 5.05 mm.
âAllows for a disangulation of as much as 40 degrees between the
long axis of the implants.
âIn situations with greater disangulation, the angulated abutment
is used
103. External Hex Internal Hex Morse Taper
â˘External hex-0.7mm standard
hexagon
â˘Interchangeable in regular
size platform
â˘Screw loosening
â˘Mechanical failure
â˘Rotational misfit
â˘1.7-mm-deep hex below a 0.5-
mmâ wide, 45° bevel
â˘Distribute intraoral forces deeper
within the implant to protect the
retention screw from excess
loading,
â˘Reduce the potential of
microleakage
â˘Superior strength
â˘Tapered
abutment post is
inserted into the
nonthreaded shaft
of a dental
implant with the
same taper
104. Osseotite Certain, 3i Implant Innovations,
âThe internal connection implant design incorporates an audible
and tactile âclickâ when the components are properly seated.
âReduces the need for radiographs
âThis internal connection design incorporates a 6-point hex
and a 12-point, double-hex internal design.
ď The 6-point internal hex -straight abutments.
ďThe 12-point, double-hex -machined preangled abutments to
correct the off-axis emergence of the implant
Israel M. Finger et al The evolution of external and internal implant/abutment connections; Pract Proced
Aesthet Dent 2003;15(8):625-632
105. Platform switching
âThe platform switching concept is based on the use of an
abutment smaller than the implant neck
âThis type of connection moves the perimeter of IAJ to the center
of implant axis.
âIt is likely that moving the IAJ inward brings out bacteria more
internally and, therefore, away from the bone crest this would
explain the limitation in bone resorption
106. âAtieh et al. (2010) conducted a systematic review on the clinical
relevance of platform switching and preservation of peri-implant
crest bone levels. Ten clinical studies reported a statistically
significant influence of the platform switching on the maintenance
of marginal bone levels.
âAnnibali et al. (2012) conducted a similar systematic review en
randomized controlled trials were selected for review dated from
2007 to 2011. Six of the ten clinical studies noted a significant
difference of reduced marginal bone loss around platform
switching implant-abutment group versus a traditional design.
JosĂŠ Paulo Macedo et al Morse taper dental implants and platform switching: The new paradigm in oral
implantology Eur J Dent. 2016 JanMarÍž 10(1): 148â154.
108. All on Four
âFour implants in edentulous jaws,: two straight ;two tilted
providing a secure and optimal support for a prosthetic fixed
bridge (even with minimum bone volume)
âMaximizes the use of available bone by tilting the posterior
implants by up to a maximum of 45Âş
âBenefits of Angled posterior implants:
⢠Help avoid relevant anatomical structures and can be anchored in
better quality anterior bone
⢠Offer improved support of the prosthesis by reducing cantilevers
⢠Reduce the need for bone grafting by maximizing the use of
available bone
109. âFinal restoration:
⢠Full-arch restoration with only 4 implants
⢠Fixed and removable final prosthetic solutions
⢠Flexible solutions
âEfficient Treatment Flow:
⢠Immediately loaded for shorter treatment times and improved patient
satisfaction
âImplant Placement Accuracy
⢠All-on-4 Guide assists with accurate placement of implants
⢠Can be combined with computer-aided diagnostics and treatment concept
NobelGuide
110. Zygoma Implants
âBranemark developed a specific implant called the zygomaticus
fixture to provide fixed solutions even when the conditions for
implant insertion were poor in the posterior maxilla.
âzygomatic implants as self-tapping screws in commercially pure
titanium with a well-defined machined surface.
â8 different lengths, ranging from 30 to 52.5 mm.
â45 angulated head to compensate for the angulation between the
zygoma and the maxilla.
111. âThe portion that engages the zygoma, the apical two thirds, has a
diameter of 4.0 mm and the portion that engages the residual
maxillary alveolar process, alveolar one third, has a diameter of 4.5
mm to 5 mm.
âProvide immediate or early loading with immediate function
âLess morbidity,
Indications
âSevere resorption of maxilla.
âFree-end situations in maxilla with insufficient bone height
âTotal edentulism together with reduced bone height
âPneumatization of maxillary sinus.
112. The most common complication was maxillary sinusitis,
Other less frequent complications â
â Minor sinus membrane perforation
âGingival infections
âFistula
âLip laceration
âParesthesia
â Implant
âFractures of prosthesis
âThe weighted average success is 97.05%, and maxillary
sinusitis was the most common complication, ranging from
1.5% to 18.42%
113. Conclusion
â˘With the advancements in bioengineering and biomaterials fields
continued effort of dedicated dental faculties, several innovation have made
implant dental treatment a highly successful option for patient.
â˘The incorporation of new tech. and by methods has improved the specific
areas of conventional treatment procedures.
â˘Continued research will determine if specific implant modification will
diminish complication and improve implant serviceability additionally,
future deviation in material and tech will surely improve their efficacy
114. References
âCarl e misch contemporary implant dentistry 3 rd edition
âIsrael m. Fingerthe evolution of external and internal implant/abutment
connections ; pract proced aesthet dent 2003;15(8):625-632
â Eugenia candel-martÄą rehabilitation of atrophic posterior maxilla with
zygomatic implants: review journal of oral implantology vol. Xxxviii/no. Five/2012
âSuraksha shrestha current concepts in biomaterials in dental implant science
research. Vol. 2, no. 1, 2014, pp. 7-12.
â Hemlata garg et al ; implant surface modification : a review ;journal of clinical
and diagnostic research. 2012 april, vol-6(2): 319-324
âS.Anil et al dental implant surface enhancement and osseointegration implant
dentistry ;a rapidly evolving practice
âWilliam c. Scarfe clinical applications of cone-beam computed
âTomography in dental practice jcda february 2006, vol. 72, no. 1
115. âDavid gelb; clinical and radiographic evaluation of brĂĽnemark
implants with an anodized surface following seventoeight years of
functional loading int j dent. 2013Íž 2013: 583567
âDental implant surface treatments using laserlok microchannels |
biohorizons
âAishwarya nagarajan et al diagnostic imaging for dental implant
therapy clin imaging sci. 2014Íž 4(suppl 2): 4.
âJack a. Hahn clinical and radiographic evaluation of one-piece
implants used for immediate function journal of oral implantology;
vol. Xxxiii/no. Three/2007
âRalf-j. Kohal ceramic abutments and ceramic
âOral implants. An update periodontology 2000, vol. 47, 2008, 224â
243
116. â Reham b. Osman a critical review of dental implant materials with
an emphasis on titanium versus zirconia materials 2015, 8, 932-958
â Puneet chopra mini dental implants-the same day implants;ijcd
;june ,2011 (3)
âJosĂŠ paulo macedo et al morse taper dental implants and platform
switching: the new paradigm in oral implantology eur j dent. 2016
janmarÍž 10(1): 148â154.
âMohit g kheur transitional implants: an asset to implantologyj
interdiscip dentistry year : 2011 | volume : 1 | issue : 1 | page : 49
âZeynep o¨ zkurt zirconia dental implants: a literature review ; journal
of oral implantology vol. Xxxvii/no. Three/2011
âAshu sharma; zygomatic implants/fixture: a systematic review journal
of oral implantology ; vol. Xxxix/no. Two/2013
This ppt gives a brief review of the current concepts and the possible future trends in the field of implantology.
The objectives of imaging are to decide if implant treatment is appropriate for the patient, to identify the location of vital anatomical structures such as the inferior alveolar nerve and maxillary sinus, to ascertain bone quantity, height, buccolingual width, and angulation of alveolar process, to detect any possible pathological conditions, and also to decide the length and width of the implant to be placed.
Phase 2:assists in the optimal positioning and orientation of dental implants, and ascertains the healing and integration phase of implant surgery. It also ensures appropriate abutment positioning and prosthesis fabrication.
Imaging modalities for implants
IOPA
Intra-oral imaging using electronic or charge-coupled device imaging techniques
Occlusal radiography
Cephalometric radiography
Panoramic radiography
Data are acquired using a narrow fan-shaped x-ray beam transmittedthrough the patient. The patient is imaged slice-byslice,usually in the axial plane, and interpretation of theimages is achieved by stacking the slices to obtain multiple2D representations
The cone-beam technique involves a single 360° scan inwhich the x-ray source and a reciprocating area detector
synchronously move around the patientâs head, which is stabilizedwith a head holder
The size of the FOV depicts the scan volume of CBCT machines. It depends on various factors like the size and shape of the detector, beam projection geometry and the ability to collimate the beam. Collimation of the beam limits the X-radiation exposure to the region of interest and ensures the most favorable FOV to be selected,
maller scan volumes produce higher resolution images and lowers the effective radiation dose to the patient. Size of the field irradiated is the principal limitation of large FOV cone beam imaging
In conventional CT, the voxels are anisotropic â rectangular
cubes where the longest dimension of the voxel is the axial
slice thickness and is determined by slice pitch, a function of
gantry motion. Although CT voxel surfaces can be as small
as 0.625 mm square, their depth is usually in the order of
1â2 mm. All CBCT units provide voxel resolutions that
are isotropic â equal in all 3 dimensions. This produces
sub-millimetre resolution (often exceeding the highest
grade multi-slice CT) ranging from 0.4 mm to as low as
0.125 mm (Accuitomo).
This reduces the
effective patient dose to approximately that of a film-based
periapical survey of the dentition (13â100 ÎźSv)18â20 or
4â15 times that of a single panoramic radiograph
(2.9â11 ÎźSv)
(average range 36.9â50.3 microsievert [ÎźSv])
ES and ICT enable the development of 3 dimensional treatment planâŚ.
Refinement and exact orientation of the implant positions is difficult and cumbersome.
Limitations of ICT:
Executing the plan may be difficult for the surgical team.
Conventional CT scans take pictures of slices of the body (like slices of bread). These slices are a few millimeters apart. The newer spiral (also called helical)
Although mini dental implant is actually a trade name for the most widely used small diameter implant, the 3M⢠ESPE⢠MDI Mini Dental Implant, the dental industry has adopted the term to describe this class of implants. Some small diameter implants are used as anchors in orthodontic cases and are called TADs, or temporary anchorage devices. One example of a TAD is the Unitek⢠Temporary Anchorage Device System. These differ from the more common mini dental implants in that they are removed after they are no longer needed and orthodontic treatment is completed.
The interim crown is kept out of occlusion, with minimal interproximal contacts. This approach is defined as nonfunctional immediate loading. (
(12-18,20-30,32). The values ranged between according to Galindo-Moreno et al. (13) and in the study published by Malo and de AraĂşjo
 Generally in a fully edentulous mandible, four transitional implants are recommended for a fixed provisional restoration. However for a fully edentulous maxilla, at least five transitional implants are required for a similar resultÂ
For partially edentulous situations, two or three transitional implants are used. The number of pontics should generally be restricted to two, for posterior regions if a temporary bridge is being made
The length of these implants can be shortened by a simple disc. The head can also be bent to change its angulation up to 45 degrees to achieve parallelism between abutments.
Contraindications
Depth of supporting bone is less than 10mm with insufficient cortical bone to provide implant stabilization.
Patients with excessive bruxism.
When placement of sufficient number of transitional implants is not possibleâŚ..
(NobelDirect, Nobel Biocare)
A 3.0-mm-diameter implant is also manufactured
. This is a preliminary report on outcomes of up to 3 years.
This is in accordance with, or better than, previously reported results from studies that investigated 2-piece implant designs
Peri-apical radiographs obtained upon delivery of the definitive crown and 1 year later were digitized and assessed to evaluate marginal bone loss
 should be noted that the failure rates in these reports are not surgical failures or failures to osseointegrate. The failures reported occurred after prosthesis delivery and prosthetic loading. In other words, the surgical success did not vary relative to implant length, but once the prosthesis was loaded, an in-crease in failure was observed, especially within the first 2 years.
he majority of these restorations were in the posterior mandible or maxilla. The restorations in this report were loaded for at least 18 months.
The idea was to create mechanical interlocking between implant and bone at the macro leve
. In addition to the surface roughness, sand blasting and acid etching can remove the surface contaminants and increase the surface reactivity of the metal [
SLA â sand blasted Large grit ,acid etched
Titanium is very reactive to fluoride forming soluble titanium fluoride in F solution
Gene transcripts
Sa âsurface roughness
Sdr developed interfacial area ratio :Sdr, the Developed Interfacial Area Ratio, is expressed as the percentage of additional surface area contributed by the texture as compared to an ideal plane the size of the measurement region
Both one- and two-stage techniques were used for 38 and 69 implants, respectively
Although tremedous increase in total surface area occurs. The actual load bearing capability of the coating increases the functional area by 25-30% which is still substantiate.
The increase surface roughness may also improve initial stability esp. in softer bone.
The HA ceramic is the only material in which all the osteotropic phenomena (epitaxy, apatite protein affinity and structural osteotropism) are combined.
Commercially available tetra isopropyl orthotitanate
Bisphosphates are antiresorptive agents that have beneficial effects for the patients on preventing further bone loss, and their effects on increasing the bone mass is modest
Statins are commonly prescribed drugs that inhibit 3-hydroxy-3-methylglutaryl coenzyme reductase to decrease cholesterol biosynthesis by the liver, thereby reducing serum cholesterol concentrations and lowering the risk of heart attack
Investigators evaluated the fracture strength of 1-piece zirconia implants (Sigma) after exposure to the artificial mouth, where a clinical service of 5 years was simulated. Zirconia implant fracture occurred at 725 to 850 N when the implant heads were not prepared, and at 539 to 607 N when prepared. They concluded that the mean fracture strength of zirconia implants ranged within the limits of clinical acceptance.
They are relatively a new family of high temperature, thermoplastic polymers which consist of an aromatic backbone molecular chain which is interconnected by ketone and ether functional groups. The chemical structure of the aromatic ketones confers stability at higher temperatures, resistance to chemical and radiation damage, compatibility with many reinforcing agents as glass and carbon fibres and a greater strength on a per mass basis than many metals
They are one piece implants that can be modified intraorally
Thus making it osteoconductive
Virtually all dental implant surfaces on the market are grit-blasted and/or acid-etched.
These manufacturing methods create random surfaces that vary from point to point on the implant
Since the implant cuts through any bone quality it's especially suitable for grafted bone.
The bone graft can be of various density levels, and the ability to under-prepare gives the necessary flexibility when preparing the grafted site.
The implant will cut even in under-prepared block graft sites
SLActive surfaces are produced with the same sandblasting and acid-etching, but they are rinsed under nitrogen protection to prevent exposure to air and then stored in a sealed glass tube containing isotonic NaCl solution
he Digital Imaging and Communications in MedicineÂ
- University of California Los Angeles abutment
The UCLA castable abutment has a shoulder in the apical region, which extends occlusally O.75mm
shoulder design provides adequate bulk of porcelain at the finish line without overbuilding the restoration
- can be either screw or cement retained
 This connection was developed by Stephen A. Morse, in 1864, and since has been globally used to connect drilling machines to a removable rotating drill piece. In implant dentistry, a conical âmaleâ abutment is tightened into a âfemaleâ conical implant design. This internally tapered design creates significant friction via the high propensity of parallelism between the two structures within the joint space
30-degree increments of rotational flexibility
. Plaque associated inflammatory cell infiltrate associated with gingival sulcus( P/ICI).
2. About 1.5 mm zone of inflammatory cell infiltrate associated with IAJ( A/ICI).
A/ICI was always separated by bone crest by approx. 1 mm of healthy connective tissue.
Three different surgical techniques exist for placing zygomatic implants: the sinus window technique (classic), the sinus slot technique, and the procedure for extrasinus zygomatic implants