Maxillomandibular Fixation “The Jaw-Dropping Experience of a Lifetime”

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

Client Jeremy Warner, MD  Plastic Surgery, UW Medical School

Advisor William Murphy  Assistant Professor, Department of Biomedical Engineering

Background Information Mandible is the second most fractured bone of the face Common causes of fractured mandibles 1.Assault 2.Motor vehicle accidents 3.Falls 4.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 Statement Design 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for Project Surgeons throughout history have dealt with broken mandibles in many ways Maxillomandibular fixation is outdated  requires wiring the mouth shut with the use of arch bars and wires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 Requirements Cost effective Dynamic Emergency release Patient comfort No forces on front teeth Time effective Safe

Application Apply brackets with the light cured adhesive Connect brackets diagonally with rubber bands Application time: 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 Work Upgrading the brackets Biomimetic mussel adhesive Testing with light cured adhesive on a human subject Implement our design nationwide

References Goldman, Kim E. "Mandible Fractures." Ask An Oral & Maxillofacial Surgeon Sept "Muscles of Mastication: Form dictates function; Function follows form." Nociceptive Trigeminal Inhibition - Tension Suppression System. 15 Sept Peltier, Jacques, comp. Mandible Fractures. 26 May UTMB Dept. of Otolaryngology. 11 Sept Prater, Michael E., comp. Mandibular Fractures. 27 Nov UTMB Dept. of Otolaryngology. 20 Sept Stierman, Karen, and Byron J. Bailey. "Mandible Fractures." 14 June Sept