Dental implant is a device
inserted into the jaw bone
to support a dental
penetrate oral mucosa to
replace the natural tooth.
In 1952 Per-Ingvar Brånemark used a titanium implant chamber to
study blood flow in rabbit bone and noted that the chambers could
not be removed at the end of the experiment. He called the discovery
• Severe morphologic compromise of denture
• Poor oral muscular coordination
• Low tolerance of mucosal tissues
• Parafunctional habits
• Active or hyperactive gag reflexes
• Psychological inability to wear removable prosthesis
• Single tooth loss
• Unfavorable number and location of abutments in a
Contraindications for Dental Implant
1. Acute illness.
2. Terminal illness.
4. Uncontrolled metabolic disease.
5. Tumoricidal radiation to the implant site.
6. Unrealistic expectation.
7. Improper motivation.
8. Lake of operator experience.
9. Unable to prosthodotically restore.
1. Preservation of bone
2. Improved function
4. Stability and support
1. Can’t be used in medically compromised patients
who can’t undergo surgery
2. Longer duration of treatment
3. Need of patient cooperation
Types of Dental Implants
Types of Dental Implants
is a direct structural and
between living bone
• and the surface of load
carrying implant ,which
mean that there is no
progressive motion between
the living bone and the
implant under functional test
for entire life of the patient
stability with out distortion
at the interface area
1. Replacement of dentition
and supporting tissues to
restore function and
2. Alveolar bone preservation.
• The impression materials used in dental implantology
should have the following criteria :
We have two types of abutment:
And screwed to fixture, the abutment
is prepared intraorally and the
impression is taken like that of the
ordinary crown and bridges technique
B- implant(fixture level)
there are two impression techniques are used in
dental implantology :
1- indirect (close-tray) technique.
2- direct (open-tray) technique.
The analogs are inserted into
impression post & secured using the
A flexible gingival mask
should be fabricated for
all implant work.
It ensures optimal
contouring of the
When removed , it
allows unhindered view
of the neck of the
The stone model with the
flexible gingival mask &
analogs for the restoration
is now complete.
The stone with the gingival
This method of tooth
replacement can be
very esthetic and
functional for a
period of time.
1- tooth supported bridge
advantages to replacing a single missing tooth
with an implant-supported crown:
1. It looks, feels, and functions like a natural
2. It is much more esthetic long term
3. It does not decay
4. There is no need to grind down the adjacent
5. The bone is preserved, preventing a visible
6. It is more hygienic than a tooth-supported
there are three common treatment
1-the traditional tooth supported bridge,
2-a removable partial denture and
3-an implant supported bridge.
In this situation the benefits of implant-supported
teeth are even more obvious because comfort and
stability are also concerns.
The advantages of replacing multiple missing teeth
with implant-supported bridges include the following:
1. They look, feel, and function like natural teeth
2. They are much more comfortable and stable than
3. Natural biting and chewing capacity is restored
4. They virtually stop the bone resorption (deterioration)
5. The integrity of the facial structures is maintained
6. Adjacent natural teeth are not compromised by
grinding them down into peg shapes or slowing
loosening them with pressure
Some of the many advantages of implant supported
replacement teeth include the following:
1. They are more comfortable and stable than
2. They virtually stop the bone resorption (deterioration)
3. Integrity of the facial structures is maintained
4. Appearance is improved
5. It is not necessary to cover the roof of the mouth, so
food can be tasted
6. Relines and repairs are infrequent compared to
7. Natural biting and chewing capacity is restored
Free-End Distal Extension
( 1 ) a single implant placed
distal to the most posterior
natural abutment and
(2) A fixed prosthesis made
to connect the implant and
a natural tooth abutment.
The implant dentist has two options in treating the patient
missing terminal posterior abutments:
• Anterior region
The implant must have
1- proper position,
3-and depth for esthetic restoration
1 - Presence of the inferior alveolar nerve limits
2 -increased occlusal load
is one reason for the higher implant failure rate
in this region
Overview of Steps in Replacing Missing
Teeth with Dental Implants:
i. Examination and preliminary X-rays and/or
ii. Extraction of tooth/teeth as needed
iii. Soft tissue grafts and/or bone grafts as
iv. Placement of the dental implants
v. Delivery and installation of the prosthesis:
crown, fixed bridge, or removable prosthesis