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Repiphysis Expandable Technology “ When MEs and MDs talk”

Repiphysis Expandable Technology “ When MEs and MDs talk”. Presented By: Jessica M. Lopez. What is it?. Prosthesis designed for children with cancer who are in danger of amputation Grows up to three inches without surgery Expands about 1/8” to 1/2”at a time so it isn’t painful

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Repiphysis Expandable Technology “ When MEs and MDs talk”

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  1. Repiphysis Expandable Technology“When MEs and MDs talk” Presented By: Jessica M. Lopez

  2. What is it? • Prosthesis designed for children with cancer who are in danger of amputation • Grows up to three inches without surgery • Expands about 1/8” to 1/2”at a time so it isn’t painful • Designed by French engineer Arnaud Soubeiran • First used in December 2002

  3. How Does It Work? • A spring mechanism is buried in the larger of two polymer sleeves • An electromagnetic field is delivered to an internal antennae, softening the polyetheylene

  4. How Does It Work? • The spring expands. • When the electromagnetic field is removed, the polymer hardens, locking the spring at its new length.

  5. Non invasive after initial surgery No anesthetics needed (saves $) Can be used for various cancers such as osteosarcoma and Ewing's sarcoma Reduces the need for amputation Limb Salvage…

  6. Produced by hot forging 90 wt% Ti, 6 wt% Al, 4 wt% V Allows for better CT and MRI scanning Doesn’t interfere with the body’s chemistry Imitates density of real bone Tensile strength, and fatigue strength match, if not exceed those of stainless steel More biocompatible Titanium Alloy

  7. Resistance to moisture Satisfactory resistance to degradation by various environments. Pg 595, Table 17.4 of your text book. Inherent toughness Does not allow tissue to scar onto it, easing the pain of elongation. Polyetherether Ketones

  8. Reference • ABC13 news http://abclocal.go.com/ktrk/news/63003_health_bonecancer.html • Institute for Limb Preservation http://www.limbpres.com/TechList.asp • Jelsoft Enterprises Limited http://forums.macrumors.com/archive/topic/55820-1.html • Mechanical Engineering, Vol.126/No.2 February 2004, ASME, New York, NY • Dr Mike Jenkins www.eng.bham.ac.uk/metallurgy/people/Jenkins_files/ smsEngineeringPolymers.pdf • Material Science and Engineering, William D. Callister, Jr.,Von Hoffman Press, 2003 • DynoMed, Inc http://www.wcortho.com/Patients/oncology/repiphysis.asp

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