Maxillomandibular Fixation

“The Jaw-Dropping Experience of a Lifetime”

Our TeamFrom left to right… Emily Maslonkowski (BSAC) Ashley Phillips (Co-Team Leader) Nina Lewis (Co-Team Leader) Sara Karle (BWIG) Joe Ferris (Communications)

ClientJeremy Warner, MD

Plastic Surgery, UW Medical School

AdvisorWilliam Murphy

Assistant Professor, Department of Biomedical Engineering

Background Information Mandible is the second most fractured

bone of the face Common causes of fractured

mandibles1. Assault2. Motor vehicle accidents3. Falls4. Sporting accidents

3 steps in fixing a mandible: realign bones, fixation, and rehabilitation

Jaw Forces 3 main muscles in mastication

Masseter Temporalis Pterygoid

Figure 1 Figure 2 Figure 3

Problem StatementDesign a device which will:

Fixate the top of the mouth to the jaw Be easier and faster to apply Maintain an adequate cost of application Be safe for the 4-6 weeks of healing

Motivation for ProjectSurgeons throughout history have

dealt with broken mandibles in many ways

Maxillomandibular fixation is outdated requires wiring the mouth shut with the

use of arch bars and wires

Our Client’s RequirementsCost effectiveDynamicEmergency

releasePatient

comfort

No forces on front teeth

Time effectiveSafe

Application•Apply brackets with thelight cured adhesive• Connect brackets diagonally with rubber bands• Application time: 10-20 minutes

Figure 1

Materials and Costs 8-16 stainless steel brackets

6 mm x 2 mm x 2.5 mm hook length: 2.5 mm

4-8 3M Unitek rubber bands GC Fuji Ortho adhesive

Estimated Cost…$60 per application

Evaluation Pros

Quick release Short

application time

No anesthesia necessary

Aesthetically pleasing

Cons Bracket

detachment

Future WorkUpgrading the bracketsBiomimetic mussel adhesiveTesting with light cured adhesive on

a human subjectImplement our design nationwide

References Goldman, Kim E. "Mandible Fractures." Ask An Oral &

Maxillofacial Surgeon. 2005. 8 Sept. 2005 <http://www.calweb.com/~goldman/mandible_fractures.html>.

"Muscles of Mastication: Form dictates function; Function follows form." Nociceptive Trigeminal Inhibition - Tension Suppression System. 15 Sept. 2005 <http://www.nti-tss.com/slide1.htm>.

Peltier, Jacques, comp. Mandible Fractures. 26 May 2004. UTMB Dept. of Otolaryngology. 11 Sept. 2005 <http://www.utmb.edu/otoref/Grnds/Mandible-fx-040526/Mandible-fx- 040526.htm>.

Prater, Michael E., comp. Mandibular Fractures. 27 Nov. 1996. UTMB Dept. of Otolaryngology. 20 Sept. 2005 <http://www.utmb.edu/otoref/Grnds/Mandibular-fx-961127/Mandibular-fx-961127.htm>.

Stierman, Karen, and Byron J. Bailey. "Mandible Fractures." 14 June 2000. 10 Sept. 2005 <http://www.utmb.edu/otoref/Grnds/Mandible-fx- 0006/Mandible-fx-0006.pdf>.