Novel implant design of the proximal interphalangeal joint using an optimized rolling contact joint mechanism

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dc.contributor.authorHong, Seok Woo-
dc.contributor.authorYoon, Junsuk-
dc.contributor.authorKim, Yong-Jae-
dc.contributor.authorGong, Hyun Sik-
dc.identifier.citationJournal of Orthopaedic Surgery and Research. 14(1):212ko_KR
The aims of this study were to propose a novel implant design for the proximal interphalangeal joint (PIPJ) of the hand using a rolling contact joint (RCJ) mechanism and to derive an optimal implant design based on human PIPJ kinematics.

In total, 10 participants with normal PIPJs were enrolled in this study. True lateral finger radiographs were obtained in 10° increments from 0º (full extension) to 120° flexion of PIPJ. Radiographs were used to determine the average center of rotation, which formed the basis of a mathematical expression of the PIPJ kinematics. The variations in extensor tendon excursions in relation to the range of motion of PIPJ were determined using results from previous cadaveric studies. As the next step, a PIPJ implant design using an RCJ mechanism that was most consistent with the mathematically expressed PIPJ kinematics and tendon excursions was determined using a constrained optimization algorithm.

The final proposed PIPJ implant had a relatively constant center of rotation over the entire PIPJ range of motion among the participants. In addition, the extensor tendon excursions of the proposed implant as applied to the phalangeal bones were similar to those of the human tendon. The proposed PIPJ implant achieved an acceptable position of the RCJ surface on the proximal and middle phalanges, which was derived from the constrained optimization algorithm.

A novel PIPJ implant design using an RCJ mechanism demonstrated acceptable outcomes in terms of PIPJ human kinematics and tendon excursions.
dc.description.sponsorshipThis research was supported by the Seoul National University Bundang Hospital Research Fund (grant no. 14-2017-001) and in part by the convergence technology development program for bionic arm through the National Research Foundation of Korea (NRF) funded by the Ministry of Science & ICT (no. 2015M3C1B2052817). The funders had no role in the study design, data collection, analysis and interpretation, and writing the manuscript.ko_KR
dc.publisherBioMed Centralko_KR
dc.subjectProximal interphalangeal joint implantko_KR
dc.subjectRolling contact joint mechanismko_KR
dc.subjectAverage center of rotationko_KR
dc.subjectTendon excursionko_KR
dc.subjectConstrained optimizationko_KR
dc.titleNovel implant design of the proximal interphalangeal joint using an optimized rolling contact joint mechanismko_KR
dc.rights.holderThe Author(s).-
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College of Medicine/School of Medicine (의과대학/대학원)Orthopedic Surgery (정형외과학전공)Journal Papers (저널논문_정형외과학전공)
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