Maxillomandibular FixationOur TeamClientAdvisorOutlineBackground InformationProblem StatementMotivation for ProjectOur Client’s RequirementsDesign #1: External StabilizationDesign #1: Materials and CostsDesign #1: EvaluationDesign # 2: Screws and MagnetsDesign #2: Materials and CostsDesign #2: EvaluationDesign #3: BracesDesign #3: Materials and CostsDesign #3: EvaluationDecision MatrixGoals for the Rest of the SemesterReferencesANY QUESTIONS?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, MDPlastic Surgery, UW Medical SchoolAdvisorWilliam MurphyAssistant Professor, Department of Biomedical EngineeringOutlineBackground InformationProblem StatementMotivationOur Client’s RequirementsDesigns for ProjectDecision MatrixGoals for ProjectQuestionsBackground InformationMandible is the second most fractured bone of the faceCommon causes of fractured mandibles1. Assault2. Motor vehicle accidents3. Falls4. Sporting accidents3 steps in fixing a mandible: realign bones, fixation, and rehabilitationProblem 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 healingMotivation for ProjectSurgeons throughout history have dealt with broken mandibles in many waysMaxillomandibular fixation is outdatedrequires wiring the mouth shut with the use of arch bars and wiresMust be a better way!Our Client’s RequirementsCost effectiveLight weightDynamicEmergency releaseNo forces on front teethTime EffectiveSafeDesign #1: External StabilizationPlace support on headTighten straps securelyDesign #1: Materials and CostsJaw braceEstimated Price…$70Design #1: EvaluationProsEasy applicationCost effectiveQuick releaseNo anesthesiaConsAestheticsDiscomfortSmall chance of sliding offDesign # 2: Screws and MagnetsFigure 1Figure 2Figure 3Magnets attached to screwsDrill screws into jawUse magnetic force to hold jaw togetherDesign #2: Materials and Costs4 Titanium Cortical Screws4 AlNiCo MagnetsCentre Drive Hexagonal Screwdriver (one-time cost)Estimated Cost...$103.36-$110.56 per applicationDesign #2: EvaluationProsRe-usable materials (screws)Quick ApplicationDurableConsNo emergency releaseNot aesthetically pleasing Requires anesthesiaDesign #3: Braces• Apply brackets• Connect lateralbrackets with elastic• Connect vertical bracketswith rubber bandsFigure 2Figure 1Design #3: Materials and Costs16 (stainless steel) brackets16 elastics (power chain) adhesive 8 rubber bandsEstimated Cost…$400 per applicationDesign #3: EvaluationProsQuick releaseShort application time (approx. 15-20 minutes)No anesthesia necessaryAesthetically pleasingConsExpensiveDesign 1: ExternalDesign 2: Screws/MagnetsDesign 3: BracesApplication Time5 4 4Cost 5 3 2Quick Release 5 1 5Aesthetics 1 2 5Comfort 1 2 4Durability 2 4 4Local Anesthesia5 1 5Total 24 17 29Scale: 1-5, 1=poor, 5=goodDecision MatrixGoals for the Rest of the SemesterFind muscle forces in jawTest design on model skullFind exact price of braces designReferencesGoldman, 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>.ANY
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