The long term goal of the research team is to automate the construction of the lower limb prostheses using Computer Integrated Manufacturing (CIM) techniques

Besser, Marcus P.

Esquenazi, A.

Kuenzig, Denise

Seliktar, Rahamim

Vachranukunkiet, Theerasakdi

The long-term goal of the research team is to automate the construction of lower limb prostheses using computer integrated manufacturing (CIM) techniques

Name not available

Investigation of the optimal load-bearing characteristics of patellar tendon bearing (PTB) prostheses

Jefferson Digital Commons

Thomas Jefferson UniversityJefferson Digital CommonsDepartment of Physical Therapy Faculty Papers Department of Physical TherapyDecember 1988Investigation of the optimal load-bearingcharacteristics of patellar tendon bearing (PTB)prosthesesRahamim SeliktarDrexel UniversityTheerasakdi VachranukunkietMarcus P. BesserThomas Jefferson University, marcus.besser@jefferson.eduDenise KuenzigA. EsquenaziLet us know how access to this document benefits youFollow this and additional works at: http://jdc.jefferson.edu/ptfpPart of the Physical Therapy CommonsThis Article is brought to you for free and open access by the Jefferson Digital Commons. The Jefferson Digital Commons is a service of ThomasJefferson University's Center for Teaching and Learning (CTL). The Commons is a showcase for Jefferson books and journals, peer-reviewed scholarlypublications, unique historical collections from the University archives, and teaching tools. The Jefferson Digital Commons allows researchers andinterested readers anywhere in the world to learn about and keep up to date with Jefferson scholarship. This article has been accepted for inclusion inDepartment of Physical Therapy Faculty Papers by an authorized administrator of the Jefferson Digital Commons. For more information, pleasecontact: JeffersonDigitalCommons@jefferson.edu.Recommended CitationSeliktar, Rahamim; Vachranukunkiet, Theerasakdi; Besser, Marcus P.; Kuenzig, Denise; andEsquenazi, A., "Investigation of the optimal load-bearing characteristics of patellar tendon bearing(PTB) prostheses" (1988). Department of Physical Therapy Faculty Papers. Paper 6.http://jdc.jefferson.edu/ptfp/6Journal of Rehabilitation Research and Development, Progress Reports, 1988 Investigation of the Optimal Load-Bearing Characteristics of Patellar Tendon Bearing (PTB) Prostheses Rahamim Seliktar, PhD; Theerasakdi Vachranukunkiet, MD; Marcus Besser, MSME; Denise Kuenzig, BSME;  A. Esquenazi, MD  Drexel University, Philadelphia, PA 19104; Moss Rehabilitation Hospital, Philadelphia, PA 19104  Sponsor: National Science Foundation  Purpose—The long term goal of the research team is to automate the construction of the lower limb prostheses using Computer Integrated Manufacturing (CIM) techniques. To accomplish this, our understanding of the amputee-prosthesis system must be broadened. This ongoing project is specifically looking at load transmission through the stump-socket interface. This information will be combined with the results of two other investigations; one looking at the dynamic and structural characteristics of the prosthesis as a whole, and the other looking at the amputee and his/her compensatory activities due to physiological attitudes or physiological limitations.  These studies will provide us with the information necessary to develop a method for automated design of customized prostheses. This method will be integrated into a CIM process. The ultimate result of this project is expected to lead to an improvement in the quality of prosthetic care delivery, based on quantitative and objective measures.  Methodology—Instrumented prostheses are manufactured for each subject. Interfacial forces are measured at the patellar tendon, as well as pressures at the distal end of the stump. The socket geometry is altered in the patellar tendon and the stump-end regions. These forces and pressures are collected simultaneously with ground reaction forces and kinematic data.  Progress—Fourteen below-knee amputees (11 men, 3 women; ages 28 to 67) were fitted with the experimental prostheses, and several more subjects are currently being sought. Data has been collected on 10 of the subjects (4 could not complete the protocol), with information gathered on a variety of socket geometries.  Results—The following is a summary of results for the past year: 1) The original design of the instrumented prosthesis has been modified extensively to decrease weight and improve accuracy; 2) A mathematical model of the stump-socket interface is being developed for a better understanding of the interdependency of load bearing regions of the residual limb; 3) Preliminary results have led to an investigation of the cause of instability at the stump socket interface, and its probable causes. This information was presented at the 1988 East Coast Clinical Gait Analysis Conference; and, 4) Other experimental results have been analyzed and reported.   Publications Resulting from This Research   Structural Synthesis of Lower Limb Prostheses for Optimal Gait Performance. Seliktar R, Proceedings of the 13th Northeast Bioengineering Conference, Philadelphia, PA, 237-240, 1987.  Toward Automation of the Manufacturing of Lower Limb Prosthesis. Seliktar R, Proceedings of the Special Congress of the International Society for Prosthetics and Orthotics, Israel, 1987.  Gait Performance Following Skeletal Modification or Lower Limb Amputation. Seliktar R, Mizrahi J, Vachranukunkiet T, Besser M, Kuenzig D, IEEE Engineering in Medicine and Biology Society 10th Annual Conference, New Orleans, 1988.  Human Performance with Prosthetic Devices and Surgically Modified Skeletal Elements. Seliktar R, Mizrahi J, Vachranukunkiet T, Besser M, Kuenzig D, Automedica (accepted for publication).   

Thomas Jefferson UniversityJefferson Digital CommonsDepartment of Physical Therapy Faculty Papers Department of Physical TherapyDecember 1989Investigation of the optimal load-bearingcharacteristics of patellar tendon bearing (PTB)prosthesesRahamim SeliktarDrexel UniversityTheerasakdi VachranukunkietMarcus P. BesserThomas Jefferson University, marcus.besser@jefferson.eduDenise KuenzigA. EsquenaziLet us know how access to this document benefits youFollow this and additional works at: http://jdc.jefferson.edu/ptfpPart of the Physical Therapy CommonsThis Article is brought to you for free and open access by the Jefferson Digital Commons. The Jefferson Digital Commons is a service of ThomasJefferson University's Center for Teaching and Learning (CTL). The Commons is a showcase for Jefferson books and journals, peer-reviewed scholarlypublications, unique historical collections from the University archives, and teaching tools. The Jefferson Digital Commons allows researchers andinterested readers anywhere in the world to learn about and keep up to date with Jefferson scholarship. This article has been accepted for inclusion inDepartment of Physical Therapy Faculty Papers by an authorized administrator of the Jefferson Digital Commons. For more information, pleasecontact: JeffersonDigitalCommons@jefferson.edu.Recommended CitationSeliktar, Rahamim; Vachranukunkiet, Theerasakdi; Besser, Marcus P.; Kuenzig, Denise; andEsquenazi, A., "Investigation of the optimal load-bearing characteristics of patellar tendon bearing(PTB) prostheses" (1989). Department of Physical Therapy Faculty Papers. Paper 7.http://jdc.jefferson.edu/ptfp/7Journal of Rehabilitation Research and Development, Progress Reports, 1989 Investigation of the Optimal Load-Bearing Characteristics of Patellar Tendon Bearing (PTB) Prostheses R. Seliktar, PhD; T. Vachranukunkiet, MD; M. Besser, MSc; D. Kuenzig, BSc; A. Esquenazi, MD  Mechanical Engineering and Mechanics Department, Drexel University, Philadelphia, PA 19104;  Moss Rehabilitation Hospital, Philadelphia, PA 19141  Sponsor: National Science Foundation  Purpose—The long-term goal of the research team is to automate the construction of lower limb prostheses using computer integrated manufacturing (CIM) techniques. This ongoing project is specifically investigating the load transmission through the stump-socket interface. This information will be combined with the results of two other investigations; one looking at the dynamic and structural characteristics of the prosthesis as a whole, and the other looking at the amputee and his/her compensatory activities due to psychological attitudes or physiological limitations.  The ultimate objective of this project is to lead to an improvement in the quality of prosthetic care delivery, based on quantitative and objective measures.  Methodology/Progress—Instrumented prostheses are manufactured for each subject. Interfacial forces are measured at the patellar tendon, as well as pressures at the distal end of the stump. The socket geometry is altered in the patellar tendon and the stump-end regions. These forces and pressures are collected simultaneously with ground reaction forces and kinematic data. The project was broadened to include additional interfacial measurements of forces acting at the tibial crests and the tibial flares. This expansion will be administered with two experimental systems on two amputees. The systems are currently being installed on one prosthesis of a new subject, and a second subject has been selected. Subsequently, the project will be terminated and final conclusions will be drawn.  Results—The following is a summary of results for the past year in this ongoing study: 1) the original design of the instrumented prosthesis has been modified extensively to decrease weight and improve and accuracy; 2) the measuring systems have been revised considerably for the purpose of expanding their measuring capabilities as stated above; 3) a mathematical model of the stump-socket interface is being developed; 4) preliminary results have led to an investigation of the accuracy of the gait studies performed, and to conclusion as to the cause of instability at the stump-socket interface, and its probable causes. This information was presented at the 1988 East Coast Clinical Gait Analysis Conference; and, 5) other experimental results have been analyzed and reported in the relevant literature.  Publications Resulting from This Research  Structural Synthesis of Lower Limb Prostheses for Optimal Gait Performance. Seliktar R, in Proceedings of the 13th Northeast Bioengineering Conference, Philadelphia, PA, 1987.   Toward Automation of the Manufacturing of Lower Limb Prostheses. Seliktar R, in Proceedings of the Special Congress of the International Society for Prosthetics and Orthotics, Israel, 1987.   Gait Performance Following Skeletal Modification or Lower Limb Amputation. Seliktar R, Mizrahi J, Vachranukunkiet T, Besser M, Kuenzig D, IEEE Engineering in Medicine and Biology Society 10th Annual Conference, New Orleans, LA, 1988.   Human Performance with Prosthetic Devices and Surgically Modified Skeletal Elements. Seliktar R, Mizrahi J, Vachranukunkiet T, Besser M, Kuenzig D, Invited Paper, Automedica, 11:145-162, 1989.   

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Investigation of the optimal load-bearing characteristics of patellar tendon bearing (PTB) prostheses

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