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

Maxillomandibular Fixation

“The Jaw-Dropping Experience of a Lifetime”


Our team
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
Client

  • Jeremy Warner, MD

    • Plastic Surgery, UW Medical School


Advisor
Advisor

  • William Murphy

    • Assistant Professor, Department of Biomedical Engineering


Background information
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
Jaw Forces

  • 3 main muscles in mastication

    • Masseter

    • Temporalis

    • Pterygoid

Figure2

Figure1

Figure3


Problem statement
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
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  • Maxillomandibular fixation is outdated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

Our Client’s Requirements


Application
Application

  • Apply brackets with the

  • light cured adhesive

  • Connect brackets diagonally

  • with rubber bands

  • Application time: 10-20

  • minutes

Figure 1


Materials and costs
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
Evaluation

  • Cons

    • Bracket detachment

  • Pros

    • Quick release

    • Short application time

    • No anesthesia necessary

    • Aesthetically pleasing


Future work
Future Work

  • Upgrading the brackets

  • Biomimetic mussel adhesive

  • Testing with light cured adhesive on a human subject

  • Implement our design nationwide


References
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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