Maxillomandibular fixation
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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

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Maxillomandibular Fixation

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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

    • Assault

    • Motor vehicle accidents

    • Falls

    • Sporting accidents

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


Jaw Forces

  • 3 main muscles in mastication

    • Masseter

    • Temporalis

    • Pterygoid

Figure2

Figure1

Figure3


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  • Maxillomandibular fixation is outdated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


Cost effective

Dynamic

Emergency release

Patient comfort

No forces on front teeth

Time effective

Safe

Our Client’s Requirements


Application

  • Apply brackets with the

  • light 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

  • Cons

    • Bracket detachment

  • Pros

    • Quick release

    • Short application time

    • No anesthesia necessary

    • Aesthetically pleasing


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. 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>.


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