Case of mandibular parasymphysis and angle fracture
1. A CASE OF TRAUMA
PRESENTED BY,
DR. BHAVIK MIYANI.
IInd YEAR PG OMFS.
GUIDED BY,
DR. ANIL MANAGUTTI, HOD.
DR. SHAILESH MENAT, PROFESSOR.
DR. RUSHIT PATEL, READER.
Department of OMFS, NPDCH
1
3. NAME :- Priyansh Patel
AGE/SEX :- 29 Years/ Male
OCCUPATION :- Bussinessman
ADDRESS :- Surat
CONTACT NO :- 9825654223
OPD NO. :-
CASE REPORT
Department of OMFS, NPDCH
3
4. CHIEF COMPLAIN
Patient complain of pain in lower
right back and lower front jaw region
since 2 hours.
Department of OMFS, NPDCH 4
5. HISTORY OF PRESENT ILLNESS
• Patient was relatively asymptomatic before
2 hours.
• Then he met an accident while he was
driving a bike a monkey came across to the
road and fallen down on the road on front
side.
Department of OMFS, NPDCH
5
6. • Then he visited civil hospital, visnagar from there he
referred to our department.
• No H/O – Epistaxis, Bleeding from ear, Vomiting.
• No H/O – Unconsciousness.
Department of OMFS, NPDCH 6
7. PAST MEDICAL HISTORY :-
- No H/O previous hospitalization
- No H/O any systemic diseases like Hypertension, Diabetes
Mellitus, Hepatitis
PAST DENTAL HISTORY :-
- No relevant past dental history
DRUG HISTORY :-
- No relevant drug allergy
FAMILY HISTORY :-
- No relevant family history
Department of OMFS, NPDCH
7
8. PERSONAL HISTORY :-
- Habits :- No harmful habits
- Diet :- Vegetarian
- Marital status :- Married
- Brushing :- Once a day with toothbrush
Department of OMFS, NPDCH 8
9. • Conscious
• Cooperative
• Well Oriented to time, place and person
• Built :-Well built
• Nourishment :- Well nourished
• Gait :- Normal
Vital signs :-
• Temperature: Afebrile
• Blood pressure: 130/84 mmhg
• Pulse rate: 88 beats/min
• Respiratory rate: 14 cycles/min
GENERAL EXAMINATION
Department of OMFS, NPDCH
9
10. LOCAL EXAMINATION
1. EXTRA- ORAL EXAMINATION :-
• Face :- Facial asymmetry due to swelling present
over right zygoma region.
• Skin and soft tissue :- Laceration over right zygoma
and left cheek region.
• Lips :- Competent
• Jaw movement :- Reduced due to pain
• TMJ :- No clicking or crepitus while opening or closing
mouth
• Mouth Opening :- 38 mm
• Tenderness on palpation on left parasymphysis
region and right angle region of mandible.
Department of OMFS, NPDCH
10
19. OPG
OPG is showing fracture line starting from crest of alveolar ridge between 33 and 34
tooth and passing inferior and backward direction involving inferior border of mandible suggestive of
parasymphysis fracture. There is also presence of fracture line passing from 48 inferior and
backward direction involving basal bone suggestive of simple fracture.
20. FINAL DIAGNOSIS
1. Favorable Left Mandibular Parasymphysis
Fracture
2. Horizontal Unfavorable Simple Right
Mandibular Angle Fracture
Department of OMFS, NPDCH 20
27. CONTENTS
- INTRODUCTION
- ANATOMY OF THE MANDIBLE
- BIOMECHANICAL CONSIDERATION
- CLASSIFICATIONS
- GENERAL PRINCIPLES OF TREATMENT OF
MANDIBULAR FRACTURE
- SURGICAL APPROACHES
- CORONOID FRACTURE
- CONCLUSION
- REFERENCES
Department of OMFS, NPDCH 27
28. FRACTURE
“Fracture is defined as a sudden, violent
discontinuity of bone and may be complete or
incomplete in character.”
Department of OMFS, NPDCH 28
INTODUCTION
30. AREAS OF WEAKNESS OF MANDIBLE
• Symphysis, which is the region of bony union of the 2 halves
during 1st year of life
• Parasymphysis region due to presence of mental foramen and
canine root
• Junction of the stronger body of the mandible and the weaker
ramus – angle
• Areas where investing bone volume is reduced due to presence
of long roots or impacted teeth – parasymphysis and angle
• Edentate regions of the mandible leads to atrophy of the bone
• Slender neck of the Condyle.
Department of OMFS, NPDCH
30
33. • Simple
• Compound
• Comminuted
• Green stick
• Pathological
PATTERN OF FRACTURE
(KRUGER’S GENERAL CLASSIFICATION):
• Multiple
• Impacted
• Atrophic
• Indirect/countercoup fractures
• Complicated or complex
34. BASED ON THE ANATOMIC REGION BY
DINGMAN AND NATVIG
35. BASED ON THE PRESENCE OR ABSENCE OF
TEETH- KAZANJIAN AND CONVERSE.
• Class I - Teeth present on either side of
fracture fragment
• Class II- Teeth present on only one side of
fracture fragment
• Class III- The patient is edentulous.
38. • Patient’s general physical status
• Methodical approach -not with an “emergency-type”
mentality.
• Dental injuries -evaluated & treated concurrently
with T/t of mandibular fractures.
• Re-establishment of occlusion -primary goal
• With multiple facial #, mandibular # should be
treated first.
39. • IMF time.
• Prophylactic antibiotics– compound #
• Nutritional needs closely monitored
postoperatively.
• Most mand. # can be treated by closed
reduction.
41. INDICATIONS FOR CLOSED REDUCTION
• Nondisplaced favorable fracture
• Grossly comminuted fractures
• Fractures exposed by significant loss of overlying
soft tissues
• Edentulous mandibular fractures
• Mandibular fractures in children with developing
dentitions
• Coronoid process fractures
• Condylar fractures
42. INDICATIONS FOR OPEN REDUCTION
• Displaced unfavorable fractures through the angle
• Displaced unfavorable fractures of the body or parasymphysis
• Multiple fractures of facial bones
• Midface fractures with displaced and bilateral condylar
fractures
• Fracture of edentulous mand. with severe displacement.
• Treatment delay and interposition of soft tissue
• Systemic conditions contraindicating IMF
• Malunion - perform osteotomies
43. ADVANTAGES OF OPEN REDUCTION.
• Accurate reduction & fixation of fractures by
direct visualization.
• Better bone healing.
• Early return to normal jaw function.
• Normal nutrition, no weight loss.
• Patient can maintain oral hygiene.
• Early return to work.
44. DISADVANTAGES OF OPEN REDUCTION.
• Requires surgical exposure.
• Requires general anesthesia.
• Expensive.
• Compared to IMF technique is difficult and risky.
• Foreign body is left in the tissues.
• Scarring.
50. ARCH BARS
• INDICATIONS FOR USE
Insufficient teeth
Efficient intermaxillary fixation is
otherwise impossible.
Simple dento-alveolar fractures,
multiple tooth bearing fragments
Fracture involving middle third of
face …suspension wiring
Lab. Facilities inadequate…
51. CAP SPLINTS
• INDICATIONS
Advanced periodontal
disease
Fractures of tooth bearing
segments & condylar neck
Portion of body of mandible
missing
53. OPEN REDUCTION AND DIRECT SKELETAL
FIXATION :
OSTEOSYNTHESIS
WITHOUT IMF
Non – compression
small plates
Compression plates
Mini- plates
Lag screws
• OSTEOSYNTHESIS
WITH IMF
Transosseous wiring
Circumferential wiring
External pin fixation
Bone clamps
K - wires
62. • Screws – almost all are self tapping
self drilling( some)
• Bicortical screws can be used at the inferior border
• A minimum of two screws should be placed in each osseous
segment.
• Angle of mandible – superior aspect of mandible onto broad
surface of external oblique ridge
• Between mental foramina – two plates
• Body –one plate used ,below apices but above canal
63. • OSTEOSYNTHESIS WITH IMF
Transosseous wiring
Circumferential wiring
External pin fixation
Bone clamps
K - wires
67. INTRA-MEDULLARY PINNING
• Major (1938) – McDowell – use in maxillofacial fractures
• 2mm K-Wires are used
• Useful in emergency, immediate stabilization of a fractured
mandible
• Versatile, can be applied in any part of the mandible
• However, stability provided is not adequate for
Fixation/immobilization
69. Young adult With
Fracture of the angle
receiving Early treatment
in which
Tooth removed from fracture line
• If :
– Tooth retained in fracture line : add 1 week
– Fracture at the symphysis : add 1 week
– Age 40 years and over : add 1or 2 weeks
– Children and adolescents : subtract 1 week
3 WEEKS
PERIOD OF IMMOBILISATION
70. FRACTURES OF CORONOID PROCESS
• Incidence – 0.6 to 4.7 %
• AETIOLOGY
Injuries due to direct
trauma
Injury due to indirect
trauma
Injury of iatrogenic origin
74. Derangement of the
temporomandibular joint
Late problems with
transosseous wires and
plates
Sequestration of bone
Limitation of opening
Scars
75. • A study was conducted to compare the complication
rate with different types of mandibular fracture.
• “It was concluded that the occurrence of postoperative
complications in the treatment of mandibular fractures
is fundamentally related to the severity of the fracture
rather than to the type of treatment used.”
J Oral Maxillofac Surg :58 ;273-280, 2000
76. Review of literature……
• If the initial treatment is delayed for more than 3
days, any infection at the compound fracture site(s)
should first be resolved by MMF and intravenous
antibiotics before performing an open reduction. This
is done to ensure adequate perfusion of blood at the
fracture site when the open reduction is performed..
J Oral Maxillofac Surg 59:879-884, 2001
77. • Treatment outcomes between rigid extraoral fixation
and semi rigid intraoral fixation for the management
of isolated mandibular angle fractures were
compared and concluded that Isolated mandibular
angle fractures can be effectively treated with either
intraoral monocortical fixation or extraoral bicortical
fixation techniques.
Use of a standard protocol involving early surgical
management with limited periosteal reflection,
concomitant removal of third molars, and short-term
maxillo mandibular fixation ensures predictable
success with a low incidence of complications.
J Oral Maxillofac Surg. 2008 Nov;66(11):2254-60.
78. CONCLUSIONS
With multiple techniques available, there is still controversy
over the best treatment for each type of mandible fracture.
– The decision is a clinical one, based on patient factors, the
type of mandible fracture, the skill of the surgeon, and the
available hardwares.
79. REFERENCES
• MAXILLOFACIAL INJURIES - ROWE & WILLIAMS. VOL- 1
• ORAL MAXILLORFACIAL TRAUMA- RAYMOND-J.FONSECA.
VOL-1
• MANDIBULAR FRACTURES - KILLEY & KAY.
• PETERSON'S PRINCIPLES OF ORAL AND
MAXILLOFACIAL SURGERY Second Edition
Editor's Notes
Basically a tubular long bone which is bent into a blunt V shape
Strength resides in its dense cortical plates.
Cortical bone is thicker anteriorly and lower border of mandible while posteriorly the lower border in rel. thin
Central cancellous bone of the body forms loose network with frequent large bone free spaces.
Mandible is stronger anteriorly in midline with progressively less strength towards the condyle.
Four process: 1. angular process---attachment to masseter and medial pterygoid
2. coronoid process--- temporalis muscle
3. condylar process--- lateral pterygoid
4. alveolar process---- forms around dev. Tooth and supports their roots after eruption.
Mandible is subcutaneous/submucosal in most of its extent only part inaccessibel to palpation being the upper and posterior portion of ascending ramus.
Mylohyoid, Geniohyoid, Genioglossus & Anterior belly of omohyoid – postero-medial & inferior displacement of # fragment.
Pterygomassetric sling – Supero-medial & anterior displacement of fractured lesser fragment.
Lateral Pterygoid muscle- Antero-medial displacement of fractured condyle.
Temporalis – postero-superior displacement of fractured coronoid process.
Simple fracture: A simple fracture consists of a single fracture line that does not communicate with the exterior
Compound fracture: These fractures have a communication with the external environment, usually by the periodontal ligament of a tooth, and involve all fractures of the tooth-bearing portions of the jaws. In addition, if there is a breach of the mucosa leading to an intraoral communication or a laceration of the skin communicating with the fracture site, edentulous portions of the mandible may be involved
Comminuted fractures: These are fractures that exhibit multiple fragmentation of the bone at one fracture site. These are usually the result of greater forces than would normally be encountered in simple fractures.
Greenstick fracture: This type of fracture frequently occurs in children and involves incomplete loss of continuity of the bone. Usually one cortex is fractured and the other is bent, leading to distortion without complete section. There is no mobility between the proximal and distal fragments.
Pathologic fracture: A pathologic fracture is said to occur when a fracture results from normal function or minimal trauma in a bone weakened by pathology.
Multiple #: 2 or more lines of # on same bone not communicating with one another.
Telescoped or impacted fracture: This type of injury is rarely seen in the mandible, but it implies that one bony fragment is forcibly driven into the other. This type of injury must be disimpacted before clinical movement between the fragments is detectable
Direct fractures arise immediately adjacent to the point of contact of the trauma, whereas indirect fractures arise at a point distant from the site of the fracturing force. An example of this is a subcondylar fracture occurring in combination with a symphysis fracture.
Complex or complicated fracture: This type of injury implies damage to structures adjacent to the bone such as major vessels, nerves, or joint structures.
. Condylar Process Fracture:
runs from the mandibular notch to the posterior border of the ramus of the mandible.
2. Ascending Ramus Fracture:
extends horizontally through both the anterior and posterior borders of the ramus or vertically from the mandibular notch to the inferior border of the mandible.
3. Angle Fracture:
Any fracture distal to the second molar, extending from any point on the curve formed by the junction of the body and ramus in the retromolar area to any point on the curve formed by the inferior border of the body and posterior border of the ramus of the mandible.
4. Body Fracture:
occurs between the mesial portion of the canine and the distal portion of the second molar and extends from the alveolar process through the inferior border.
5. Symphysis Fracture:
Any fracture in the region of the incisors that runs from the alveolar process through the inferior border of the mandible.
6. Dentoalveolar Fracture:
Fracture of the tooth-bearing portion of the jaw not extending to the inferior border.
The principle of favorableness is based on the direction of a fracture line as viewed on radiographs in the horizontal or vertical plane. These terms are described from viewpoint of the observer.
A horizontally favorable fracture line resists the upward displacing forces, such as the pull of the masseter and temporalis muscles on the proximal fragment when viewed in the horizontal plane. # line extend from upper border downwards and forward whereas in unfav. # line runs from upper border downwards and backwards.
A vertically favorable fracture line resists the medial pull of the medial pterygoid on the proximal fragment when viewed in the vertical plane.# line runs from buccal plate anteriorly and backwards thru the lingual plate posteriorly whereas in unfavorable # line runs from lingual plate anteriorly backwards thru the buccal plate posteriorly.
1.Patients general physical status should be carefully evaluated and monitored before any consideration of treating mandibular #.
It must be emphasized that any force great enough to cause a mandible # is capable of injuring any other organ system of the body.
The downward spiral to disaster begins if this principle is not followed.
2.Diagnosis and treatment of mandibular # should be approached methodically and not with emergency type mentality.
Patient rarely die of mandible # so clinician has time to carefully and thoroughly evaluate the nature of injury based on history, local physical and radiological examination and treatment should be instituted in a controlled environment and fashion.
3. # teeth can become infected and may jeopardize bone union, however intact tooth in line of # that is maintaining bone fragments can be protected by antibiotic coverage.
4. It is said that facial esthetics will not be adversely affected by slight fragment displacement, however function can be severely compromised when improper treatment results in malocclusion,
Impressive appearing radiographic bone adaption should not be the primary treatment goal.
5. The principle of “inside out and from bottom to top” should be applied so to build the foundation on which facial bones can be laid
1.should vary acc. to type, location, number, severity of mand. #, pt. age & health and method used for reduction and immobilization
2. Despite numerous new antibiotics penicillin remains the agent of choice.
3. Excellent reduction and fixation technique may fail in patient who has undergone notable weight loss and has a catabolic nutritional status.
4.Because closed reduction tech. has long history of success.
1. Open reduction can carry increased risk of morbidity.
2. Because of excellent blood supply of face small bone fragments can coalesce and heal if ass. Periosteum is not disturbed.
3. Because wires, screws, and plates may decrease the chances of bone union by further disrupting the soft tissue.
2.-when treated with closed reduction, these fractures tend to open at the inferior border, leading to malocclusion
the mandible is fixed first, providing a stable and accurate base for restoration
; One of the condyles should be opened to provide an accurate vertical dimension of the face
Hippocrates was first to advocate the use of wires in reduction of mand. #
A simple bridle wire placed around the adjacent teeth of a mand # can temp. stabilize the # fragments.
it helps to prevent further soft tissue damage, aid in protecting airway, helps alleviate pain and assist in preventing muscle cramping that is ass. With instable segments.
CONTINUOUS OR MULTIPLE LOOP WIRING [COL. STOUT WIRING]
Leonard (1977) considers that eyelet wires have several drawbacks.
Drawn into interdental space
Elastic traction ..difficult
He described the use of titanium buttons of 8mm diameter, inclusive of a 1mm rim, and 2mm deep.
Indications
Pathological # or Gunshot inj.
Atrophic edentulous fractures
Osteomyelitis at an edentulous fracture site
Bone graft requirements
With a head frame
Contraindications
Irradiated tissues
Grossly contaminated tissue
Osteoporosis
Osteosclerosis
Champy was able to define the areas for miniplate fixation along the so called ideal osteosynthesis line. This line corresponds to the line of tension along the mandibular body.
From parasymphysis to parasymphysis, two miniplates are required to overcome the torsional forces affecting this area.
Posteriorly, a single miniplate along the oblique line or below it was thought to be effective; however,
Kroon has shown that the forces in this area vary from positive to negative during function, necessitating the use of a second plate inferior to the first if dependable stabilization and healing are to be achieved. Whether to use one or two miniplates when repairing a fracture at the mandibular angle remains controversial.
Holes are drilled in the bone ends 6mm distant on either side of the fracture line
Then, 0.45 mm D soft stainless steel wire is passed through the holes and across the fracture line
After accurate reduction, the free ends of the wire are twisted together tightly, cut off short and the cut end tucked into the nearest drill hole
Long curved awl is placed externally in the desired position inferior to lower border of mandible.(care taken to avoid facial vessels and area of mental foramen).
Operators middle or index finger of the other hand should be placed in the lingual sulcus where it protects the Submandibular duct and lingual nerve.
Awl is pushed thru the skin until it reaches the lower border of the mandible, with the point remaining in contact with the bone throughout the procedure, the awl is advanced so that in emerges in the lingual sulcus, where the wire is threaded into the eyelet of the awl.
Once this is done the awl is slowly withdrawn so that the point can traverse the lower border and pushed into buccal sulcus where the end of wire is retrieved and detached
The wire ends secured by the artery forceps and pulled to and fro so that no soft tissue remain b/w wire and the bone
With introduction of more accurate methods of direct fixation there has been decline in the indications for the use of this rather inaccurate method of immobilisation
Treatment is usually instituted only if occlusion is compromised or if # coronoid impinges on the zygomatic arch inhibiting mandibular movements
Infection and osteomyelitis appear to be the most common complications.
underlying causes : divided into systemic factors, such as alcoholism and no antibiotic coverage, and
local factors, such as poor reduction and fixation, fractured teeth in the line of fracture, and comminuted fractures
Most infections appear to be mixed in nature, with α-hemolytic Streptococcus and Bacteroides spp organisms found most commonly
Traumatic injury to the inferior alveolar nerve is common in displaced fractures of the body and angle of the mandible.
Return of nerve function depends on the degree of initial trauma to the nerve and an accurate reduction and adequate fixation of the mandibular fracture.
Nonunion is distinguished from delayed union by the potential of the bone to heal.
Delayed union is a temporary condition , adequate reduction and immobilization eventually produces bony union.
On the other hand, nonunion may persist indefinitely without evidence of bone healing unless surgical treatment is undertaken to repair the fracture.
Nonunion is generally characterized by pain and abnormal mobility following treatment, Malocclusion may be present, mobility exists across the fracture line.
Radiographs demonstrate no evidence of healing and in later stages show rounding off of the bone ends.
The most common reason is poor reduction and immobilization , infection, decreased blood supply, excessive stripping of periosteum and metabolic defiecinces.
Treatment
1.Eliminate underlying cause
2.If infection present---debridement of sequestrate, drainage and antibiotic therapy.
3.Loose fixation must be removed
4. Adequate rigid fixation must be done
5. If gap present bone graft may be necessary
Malunion is defined as bone union of the #in which some displacement of bone exists.
Not all malocclusion are clinically significant
In edentulous pat. Or those involving ramus or condyle result in no clinically alterations.
If malocclusion present
Use of further/prolonged IMF in early stages of bone healing
Selective tooth grinding
Orthodontics/ostetomies after complete bony union
Before reconstructing occlusion to new articulation it is necessary to allow a period of 6-12 months of complete healing.
Internal fixation of mandibular angle fractures: a comparison of 2 techniques.