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Innovative Solutions in Maxillomandibular Fixation: Enhancing Mandible Treatment

This project explores three innovative designs for maxillomandibular fixation aimed at improving the treatment of fractured mandibles—one of the most common facial injuries. The designs prioritize ease of application, safety, cost-effectiveness, and patient comfort. Alternatives include an external jaw brace, screws with magnetic stabilization, and a braces system. Each design is assessed based on functionality, aesthetics, and application time, highlighting the challenges and benefits of modernizing jaw fixation methods. Streamlining the healing process is our mission.

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Innovative Solutions in Maxillomandibular Fixation: Enhancing Mandible Treatment

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

  2. 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)

  3. Client • Jeremy Warner, MD • Plastic Surgery, UW Medical School

  4. Advisor • William Murphy • Assistant Professor, Department of Biomedical Engineering

  5. Outline • Background Information • Problem Statement • Motivation • Our Client’s Requirements • Designs for Project • Decision Matrix • Goals for Project • Questions

  6. 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

  7. 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

  8. 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for Project • Surgeons throughout history have dealt with broken mandibles in many ways • Maxillomandibular fixation is outdated • requires wiring the mouth shut with the use of arch bars and wires • Must be a better way!

  9. Cost effective Light weight Dynamic Emergency release No forces on front teeth Time Effective Safe Our Client’s Requirements

  10. Design #1: External Stabilization • Place support on head • Tighten straps securely

  11. Design #1: Materials and Costs • Jaw brace Estimated Price…$70

  12. Design #1: Evaluation • Cons • Aesthetics • Discomfort • Small chance of sliding off • Pros • Easy application • Cost effective • Quick release • No anesthesia

  13. Design # 2: Screws and Magnets Figure 3 • Magnets attached to screws • Drill screws into jaw • Use magnetic force to hold jaw together Figure 2 Figure 1

  14. Design #2: Materials and Costs • 4 Titanium Cortical Screws • 4 AlNiCo Magnets • Centre Drive Hexagonal Screwdriver (one-time cost) Estimated Cost...$103.36-$110.56 per application

  15. Pros Re-usable materials (screws) Quick Application Durable Cons No emergency release Not aesthetically pleasing Requires anesthesia Design #2: Evaluation

  16. Design #3: Braces Figure 1 • Apply brackets • Connect lateral • brackets with elastic • Connect vertical brackets • with rubber bands Figure 2

  17. Design #3: Materials and Costs • 16 (stainless steel) brackets • 16 elastics (power chain) • adhesive • 8 rubber bands Estimated Cost…$400 per application

  18. Design #3: Evaluation • Cons • Expensive • Pros • Quick release • Short application time (approx. 15-20 minutes) • No anesthesia necessary • Aesthetically pleasing

  19. Decision Matrix Scale: 1-5, 1=poor, 5=good

  20. Goals for the Rest of the Semester • Find muscle forces in jaw • Test design on model skull • Find exact price of braces design

  21. 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>.

  22. ANY QUESTIONS?

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