MAXILLOFACIAL TRAUMA Dr Mashhor Wreikat Epidemiology Ø

MAXILLOFACIAL TRAUMA Dr. Mashhor Wreikat

Epidemiology Ø Incidence 50/100000 Ø M: F Ø Causes Ø Paediatrics

General Consideration Ø H&N Ø ABCDs Ø Soft tissues

History & Physical examination

Face & Facial Skeleton Ø Inspection Ø Palpation ØAssess function

HEAD & NECK RADIOLOGICAL EXAMS

Facial Plain Films Ø Largely been replaced by computer tomography (except for the mandible) Plain Film Mandible Series and Panorex Computed Tomography (CT) Ø Most informative radiographic exam fro head and neck Trauma Ø Axial and coronal facial CT with bone and soft tissue window, 2 -3 mm sections

Special Radiologic Exams Ø Angiography Ø Magnetic Resonance Imaging Ø Modified Barium Swallow and Esophagram

MANDIBULAR FRACTURES

Introduction Ø Most common in young males (ages 18 -30) Ø Causes: assault , motor vehicle accidents, sports and gunshots wounds Ø Most common Fractures Sites Ø Risks: impacted teeth, osteoporosis, edentulous areas, pathologic, lytic lesions

Classification by Site Ø Symphyseal / Parasymphyseal Ø Body Ø Ramus Ø Coronoid Process Ø Condyle Ø Alveolus Ø Angle

Classification by Favorability Ø Favorable Ø Unfavorable

Anterior Muscles Ø Weaker force Ø Mylohyoid, genioglossus, platysma, anterior digastric muscles Ø Muscle action depresses and retracts (open mandible)

Posterior Muscles: Ø Stronger force Ø Temporalis Muscle Ø Masseter Muscle Ø Medial Pterygoid Muscles Ø Lateral Pterygoid Muscles

Classification by Type of Fracture Ø Open versus Closed Ø Fracture Pattern: Communited, oblique, transverse, spiral, greenstick Ø Pathologic: fractures secondary to bone disease (eg, osteogenic tumors, osteoporosis)

Dental Classification Ø Class III

Angles Classification Ø Class III

MANAGEMENT

Management Concepts Ø Goals: restore occlusion, establish bony union& avoid TMJ pathology Ø Repair within first week Ø In general favorable fractures may only need closed reduction Ø Postoperative Care

Maxillo-Mandibular Fixation (MMF) Closed Reduction Ø Indications Ø Methods Ø Requires an intact maxilla Ø Typically MMF may be removed after 2 -8 weeks Ø Complications

Open Reduction &Internal Fixation (ORIF) Ø Indications Ø Approaches: 1. Transoral 2. External

Management by Type Ø Coronoid, Greenstick, Unilateral Nondisplaced Fractures: observation with soft diet, analgesics, oral antibiotics and close follow-up, physio-therapy exercises for 3 months (may consider MMF for severely displaced coronoid fractures) Ø Favorable, Minimally Displaced Noncondylar Fractures : may consider closed reduction and 4 -6 weeks of MMF

Displaced Fractures Ø Symphyseal and Parasymphyseal fractures: tend to be vertically unfavorable Ø Body Fractures : almost always unfavorable Ø Angle fractures in general have the highest complication rate Ø Ramus Fractures: isolated ramus fractures are rare (protected by masseter muscle)

Surgical Complications Ø Ø Ø Ø Chin and Lip Hypesthesis Osteomyelitis Malunion Nonunion Plate Exposure Marginal Mandibular Nerve Injury Necrosis of Condylar Head (Aseptic Necrosis) Ø TMJ Ankylosis Ø Dental Injury

MAXILLARY FRACTURES

Introduction Ø Causes Ø The matrix of the maxilla absorbs energy with impact Ø Sinusitis is a potential complication

Classification Buttress System Vertical Buttressess 1. 2. 3. 4. Naso-Maxillary (NM) Zygomatico-Maxillary (ZM) Pterygo-Maxillary (PM) Nasal Septum

Horizontal Beams 1. 2. 3. 4. 5. 6. 7. Frontal Bar Inferior Orbital Rims Maxillary Alveolus and Palate Zygomatic Process Greater Wing of the Sphenoid Medial and Lateral Pterygoid Plates Mandible

Le Fort Classification Ø Based on patterns of fractures (lines of minimal resistance) classified according to the highest level of Injury Ø In many cases Le Fort classification is incomplete for maxillary fractures Ø Le Fort fractures may present in many combinations or on one side (hemi-Le Fort)

Le Fort I (Low Maxillary) Ø Transverse maxillary fracture Ø Involves anterolateral maxillary wall, medial maxillary wall, pterygoid plates, septum at floor of nose

Le Fort II (Pyramidal ) Ø Ø Caused typically from a superiorly directed force against the maxilla. Involves nasofrontal suture, orbital foramen, rim, and floor frontal process of lacrimal bone, zygomaxillary suture, lamina papyracea of ethmoid; pterygoid plate and high septum

Le Fort III (Craniofacial Dysjunction) Ø Ø Separates facial skeleton from base of skull, typically caused by high velocity impacts. Involves nasofrontal suture, zygoma and zygomatic arch; pterygoid plates and nasal septum

Management Principles Ø Ø Goals of Reconstruction Exposure/Approaches Timing Postoperative Care

Cont: Management Techniques Ø Ø Ø Plate Fixation (Miniplates) Interosseous Wire Fixation Bone Grafts

Management by Le Fort Classification Ø Le Fort I: reduced digitally, MMF, fixation of ZM Ø Le Fort II: stabilization of the ZM buttress, MMF , nasofrontal process and inferior orbital rim. Ø Le Fort III: usually requires coronal flap for adequate exposure for exploration and miniplate fixation

Surgical complications Ø Malunion, Nonunion, Plate Exposure Ø Palpable or Observable Plates Ø Forehead or Cheek Hypesthesi Ø Osteomyelitis Ø Dental Injury

ZYGOMATICOMAXILLARY & ORBITAL FRACTURES Zygomaticomaxillary Complex (Trimalar) Fractures

Zygomaticomaxillary Complex (Trimalar) Fractures Introduction Symptom: • • Subconjunctival & periorbital ecchymosis Eyelid edema Epistaxis Cheek hypesthesia Diplopia Hypophthalmos Enophthalmos Trismus

Four sutures involved in Zygomaticomaxillary Complex Fractures 1. 2. 3. 4. Zygomaticonfrontal Suture Zygomaticomaxillary Suture Zygomaticotemporal Suture Zygomaticosphenoid Suture

Management Ø Stabilizing the zygomatic arch Ø Minimum of 2 points fixation Ø Closed Reduction Ø Open Reduction

Common Approaches to Zygoma Ø Incisions Ø Intraoral approach (Keen) Ø Coronal, Hemicoronal or Extended Pretragal Approaches Ø Lateral Brow Approach

ORBITAL FRACTURES

INTRODUCTION Ø Ø Ø Orbital Bones Optic Canal& Orbital Fissures Contents Sign& Symptoms

TYPES Ø Pure Ø Impure

Management Ø Indication for Surgical Intervention Ø Contraindications for Surgical Intervention: hyphema, retinal tear, globe perforation, only seeing eye sinusitis, frozen globe Ø Ophthalmological Evaluation Ø Timing : 1 week Ø Technique

APPROACHES Ø Subciliary Incision (Infraciliary) Ø Transconjuctival Incision Ø Lynch Incision (Frontoethmoidal) Ø Brow Incision Ø Subtarsal Incision Ø Caldwell-Luc (Transantral) Approach

Surgical Complication Ø Ø Ø Ø Ø Postoperative Blindness CSF Leak Persistent Enophthalmos and Diplopia Ectropion Entropion Cheek Hypesthesia Extrusion of Grafts Malunion, nonunion, Plate. Exposure. Osteomyelitis Palpable or Observable Plates

FRONTAL SINUS FRACTURE

FRONTAL SINUS FRACTURE • Sign& Symptoms • Risk

MANAGEMENT

Anterior Table Fractures Ø Linear, Minimally Displaced Ø Depressed Fractures Ø Comminuted or Unstable Fractures

Posterior Table Fractures Ø Isolated Nondisplaced Psoterior Table Fracture Ø Displaced Posterior Table Fracture Ø Comminuted, Contaminated or through and Through Fractures--Cranialization

Surgical Complications Ø Ø Ø Ø Mucocele, Mucopyoceles Sinusitis Forehead Contour Deformity Intracranial Infections Osteomyelitis CSF leak Forehead Hypesthesia Forehead Paralysis

NASO-ORBITOETHMOID (NOE)FRACTURES

Introduction Ø Ø Ø NOE: frontal process of maxilla, nasal bones, and orbital space Sign& Symptoms Pseudohypertelorism (Traumatic Telecanthus)

Anatomy Ø Ø Medial Canthal Ligament (MCL) Lacrimal Collecting System Puncta Canaliculi Lacrimal Sac Lacrimal Duct

Management Ø First reconstruct medial orbital wall prior to repair of the MCL Ø Must consider associated injuries Ø May attempt closed reduction if MCL and lacrimal system is intact Ø Telescoping Nasal Bones and Frontal Process of the Maxilla

Nasal Fractures Introduction Ø Ø Ø Ø Most common Anterior impacts Lateral impacts Dislocated quadrangular cartilage inferiorly or “C-shaped” Children usually have dislocated or green stick fractures and have a higher risk of septal hematomas) Comminutions are more common in adults Sign& Symptoms Diagnosis

Management Initial Management Ø Preoperative photographs/x-ray may be considered for medicolegal documentation Ø Septal hematomas Ø Open fractures must be cleaned then given antibiotics

Cont : Management Surgical Management Ø Generally nasal bone depressed or deviation may undergo closed reduction Ø Open Reduction with Internal Fixation (Septorhinoplasty) Ø Pediatric Nasal Fractures: generally should be treated conservatively

Cont : Management Surgical Complications & Associated Injuries Ø Persistent Deformity Ø Nasal Obstruction Ø Septal Hematoma Ø Septal Perforation and Deviations Ø Cribriform Plate Fracture

Thank you & Good luck to your examination