Oral and Maxillofacial Surgery

Created by Dannie24 

Upgrade to
remove ads

Lips

Also known as labia, helps with facial expressions, food retention and mastication.

Teeth

Deciduous (baby teeth) and permanents.

Each individual tooth is embedded in a socket of the________ ________ of each jaw.

Alveolar process.

Palate

Roof of the mouth. Hard palate (anterior portion) is formed by the maxillary and palatine bones. Helps with word formation and the breakdown of food. The soft palate (posterior portion) aids with closing off the nasal passages during the act of swallowing, and also for closing off the airway.

Cheeks

Also called Buccal, they are the lateral walls of the oral cavity. During chewing, they serve to keep the food between the teeth.

Tongue

A thick muscular organ covered with mucous membrane that contain chemoreceptors for taste. It is attached at the floor of the buccal cavity by a structure called the lingual frenulum.

Facial bones

There are 14: 2 nasal, 2 maxillary, 2 lacrimal (smallest), 2 zygomatic (malar), 2 palatine, 2 inferior nasal turbinate, 1 mandible, and 1 vomer.

T or F: The mandible is the strongest facial bone.

True; it articulates with the glenoid fossa of each temporal bones to form a synovial joint, referred to as the temporomandibular (TMJ).

The skull is comprised of _____ bones and divided in 2 catergories: _______ and ________.

22; facial and cranial.

Facial muscles

Facial muscles assist with:

smiling, frowning, chewing, and speaking.

Facial nerve

7th cranial nerve, innervates ALL of the facial muscles of the lower jaw.

Orbital Bones

Frontal, lacrimal, ethmoid, maxilla, zygomatic, sphenoid, and palatine.

Orbital bones and muscles

Support and protect the eyes, there are 7 craniofacial bones, contain fat for protection from shock, contain the optic nerve.

Orbicular

is oculi, covers a circular path around the eye. The action of this muscle closes the eye.

Masseter

Closes the mouth and protrudes the chin.

Dental caries

Decay of tooth enamel. The bacteria in the mouth, creates an acidic environment, lowering the pH level.

Malocclusion

Misalignment of the alveolar process of the jawbones resulting in over/under bite.

Orbital fractures

Have several characteristics. Diplopia (double vision) and enophthalmos (sagging of the eye) are the most common.

Midfacial fractures

Le Fort I, is the most common type. The alveolar process of the maxilla is horizontally separated from the base of the skull.

Craniofacial deformities

Craniosynostosis, premature closure of the cranial sutures of an infant.

Other oral/maxillofacial pathologies...

fractures of the teeth, cysts/cancer, trauma, congenital deformities, mandibular fractures, frontal fractures, and zygomatic fractures.

Micro/Macrognathia

Micro: Abnormally small lower jaw. Macro: Abnormally large jaw.

Diagnostics used

Physical exam, CT scans (provide important info about possible bony defects), MRI, X-ray (should be in the OR with the patient during sx), Waters view, and palpitation.

Waters view

Is similar to the Calwell view. Both are anteroposterior projections, but in this case the nose and forehead are placed against the cassette. View shows the hard palate, nasal septum, orbital floor, and zygoma.

________ and _________ prevents drying and cracking of lips for the patient during surgery.

Cream and ointment.

T or F; During maxillofacial surgery vomiting can lead to aspiration and in the maxillofacial trauma patient, it can also lead to infection that may interfere with fracture/wound healing.

True.

Flexible Fiberoptic Laryngoscope

Will allow the anesthesia provider to advance an oral or nasal endotracheal tube (intubation) under direct visualization and provides access to oral cavity during arch bar application.

T or F; Maxillofacial procedures have a high risk of an intraoperative fire.

True: Since the surgeon is working by the face, O2 in the ET tube can cause sparks from the electrosurgical unit which can cause ignition of O2 from the ventilation system. A closed ventilation system, use a fire retardant ET tube, and careful use of electrosurgery unit can reduce the potential for fire. ALWAYS HAVE SALINE ON YOUR BACK TABLE!

Throat packs

Consist of rolled gauze that contain a radiopaque marker. It is moistened and any excess fluid is squeezed out prior to insertion. A throat pack SHOULD be included in the formal count. To reduce the risk of aspiration, a throat pack is used to prevent oral secretions, irrigation fluid, blood, and bone or tooth fragments from becoming lodged in the pharynx.

Restoration of teeth

Involves the removal of diseased or broken portions of a tooth and refurbishing the look into a working element.

Bone healing

Is expected in 4-6 weeks.

Bone grafts

Graft material can be used to fill defects from bone loss, fill cavities to promote osteogenesis, or support a week reduction.

Autogenous

Harvested from the patient.

Homogenous/Allograft

From the same species.

Heterologous/Xenograft

From a dissimilar species (coral).

Synthetic

Man made, silastic.

Dural Tears

May be repaired by the maxillofacial surgeon by placing a suture or sealing off the leak with fat, fascia, or muscle graft.

Symphysis fracture

Frontal Fracture Repair

A coronal incision (the most common approach to frontal fixtures) is made following the patient's natural hairline; it can be extended anterior to the tragus if needed.

Mandibular fracture

Zygomatic arch fracture

Orbital floor fracture

Le Fort I

Bilateral horizontal fractures of the maxilla immediately above the teeth and palate.

Le Fort II

Referred to as "panfacial" fractures. Extends from dorsum of nose, across medial walls of orbit across maxilla below the zygomatic bone. Can be unilateral or bilateral in nature.

Le Fort III

Facial bones, including the Zygomas are detached from the anterior cranial base. Fracture lines extends from the dorsum of the nose and cribriform plate along the medial tip of the lateral wall of the orbit.

Fracture of the orbital floor

Indications for surgery: Large defect in orbital floor, Enophthalmos (sagging of the eye), and diplopia on up/downward gaze which indicates muscle entrapment and double vision. .

Maxillomandibular fixation (Arch bar application)

Arch Bar Application

Immobilization of the jaw following mandibular and/or maxillary fracture. Thin strips of metal that have small intermittently placed hooks. The strips are malleable and the hooks should be placed pointing downward on the lower jaw and upward on the upper jaw. This placement allows for mandibulomaxillary elastic band or wire fixation.

After a Arch Bar application, why should the patient have wire cutters at all times?

In case access to an air way is needed.

Plate and Screw Fixation

Rigid Fixation

Done by plates and screws, or screws alone, is the most common repair technique for mandibular fractures. Used to maintain proper bone alignment and approximate and maintain the position of bone edges that have been cut.

Mouth props (bite block)

Bite block

Is placed and the cavity is removed using the dental drill. Mouth prop is placed between the upper and lower teeth of the unaffected side to maintain the patient's mouth in an open position during surgical interventions to facilitate visualization and prevent injury to the surgical staff.

Plastic cheek retractor

Minnesota retractor

Temporomandibular Joint Procedures

TMJ can undergo several procedures. Arthroscopy, meniscal repairs, and joint replacements are the most common. The meniscus lies over the mandibular condyle. The meniscus is attached to the condyle by the external pterygoid muscle and the capsule.

Kefzol

Antibiotic: facial lacerations.

Clindamycin

Antibiotic: oral cavity lacerations.

Amoxicillin

Antibiotic: communicating fractures of the sinus.

Vancomycin

Antibiotic: dural tears or CSF leaks.

Xylocaine

With or without epinephrine (minimizes postoperative pain and causes vasoconstriction).

Hemostasis

Gelfoam and bone wax are used.

Anesthesia considerations

Closed ventilation, fire retardant ET tube, and endotracheal versus nasal tube.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set