Mandibular Fractures Flashcards
(27 cards)
Symphysis boundaries
Lateral roots of central incisors
Parasymphysis boundaries
Up to lateral root of canines
Standard surgical incision to mandible
Transoral vestibular
Where is intraoral incision placed
8-10mm from junction of attached and mobile mucosa
Type of incision for edentulous patients
Crestal
When to do transcutaneous approach
Preexisting lacerations Significant comminution or bone loss Difficult repositioning needing visualization of lingual aspect.
Type of screw used for superior plate
Monocortical *bicortical or monocortical may be used for inferior plate
Which is applied first after occlusion is established?
Tension band plate then compression Or IDW then compression
Miniplate osteosynthesis: Type of Fixation
Semi rigid
Miniplate osteosynthesis: Type of Fixation
Semi rigid
Length of time for postop soft diet after miniplate osteosynthesis
4 weeks
Do compression plate osteosynthesis and lag screw osteosynthesis require soft diet?
No, both are functionally stable
How long does chin area have to be taped post op? Why?
2-3 days *to avoid swelling that may lead to dehiscence and secondary soft tissue healing
Other method to immobilize soft tissues post op apart from taping
IMMF
Body boundaries
Lateral to canine, anterior to 3rd molar
Angle boundaries
Third molar region and junction of body and ramus
T or F: Angle of mandible is thicker inferiorly
F: THINNER
6 muscles attached to mandible and location
Mylohyoid mylohyoid ridge, lingual Medial pterygoid medial inferior border Masseter lateral inferior border / angle Buccinatorlateral border, ext oblique ridge Temporalis coronoid process Superior constrictor medial to angle
Afferent nerves (3) and supply
Inferior alveolar nerve - mental nerve, lip chin teeth Lingual nerve - 1-2mm medial to int oblique ridge, FOM Tongue, sensation and taste to ant 2/3 Long buccal nerve - crosses ant ramus above the angle, sensation to cheek and buccal vestibule
Motor supply of mandibular region
V3 - musc of mastication/mylohyoid/ant digastric VII- facial expression, marginal (depressors of lip - located 1cm beneath antegonial notch of the angle, and cervical branches in submandibular triangle
Blood supply to body and angle (2)
Inf alveolar artery Periosteal plexus
Identify parts
Orange ramus
blue subcondylar area
Gold standard diagnostics for fractures of the coronoid condylar head
CT
Standard treatment for fractures of the atrophic mandible
Load bearing osteosynthesis
(reconstruction plate or locking
reconstruction plate with bicortical screw placement to
carry the functional load)
