Posterior Dislocation of the Hinge-Post Extension in a Rotating Hinge Total Knee Prosthesis

The rotating hinge knee prosthesis is a popular intervention in patients lacking stability with highly constrained total knee arthroplasty. Despite improvements in design, nonmechanical and mechanical complications continue to be a problem. Dislocation of the hinge has been widely described, mainly...

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Main Authors: Givenchy Manzano, Ran Schwarzkopf
Format: Article
Language:English
Published: Wiley 2013-01-01
Series:Case Reports in Orthopedics
Online Access:http://dx.doi.org/10.1155/2013/756538
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author Givenchy Manzano
Ran Schwarzkopf
author_facet Givenchy Manzano
Ran Schwarzkopf
author_sort Givenchy Manzano
collection DOAJ
description The rotating hinge knee prosthesis is a popular intervention in patients lacking stability with highly constrained total knee arthroplasty. Despite improvements in design, nonmechanical and mechanical complications continue to be a problem. Dislocation of the hinge has been widely described, mainly due to the component fracture. Few reports describe isolated dislocation of the rotating stem. We report a case of isolated disengagement of the rotating hinge mechanism, due to severe flexion gap imbalance, leading to subsequent posterior dislocation of the hinge and anterior knee dislocation, in a patient with a history of multiple total knee arthroplasty revisions. This case suggests the importance of the soft tissue balancing, the adequate patellar tracking, and use of a long cylindrical, minimally tapered rotating stem in hinge arthroplasty to minimize hinge dislocation.
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institution Kabale University
issn 2090-6749
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publishDate 2013-01-01
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series Case Reports in Orthopedics
spelling doaj-art-a357b62c190b4ff882db1fabb1d14c3e2025-02-03T06:14:13ZengWileyCase Reports in Orthopedics2090-67492090-67572013-01-01201310.1155/2013/756538756538Posterior Dislocation of the Hinge-Post Extension in a Rotating Hinge Total Knee ProsthesisGivenchy Manzano0Ran Schwarzkopf1Department of Orthopaedic Surgery, Joint Replacement Service, University of California Irvine Medical Center, 101 The City Drive South, Pavilion III, Building 29, Orange, CA 92868, USADepartment of Orthopaedic Surgery, Joint Replacement Service, University of California Irvine Medical Center, 101 The City Drive South, Pavilion III, Building 29, Orange, CA 92868, USAThe rotating hinge knee prosthesis is a popular intervention in patients lacking stability with highly constrained total knee arthroplasty. Despite improvements in design, nonmechanical and mechanical complications continue to be a problem. Dislocation of the hinge has been widely described, mainly due to the component fracture. Few reports describe isolated dislocation of the rotating stem. We report a case of isolated disengagement of the rotating hinge mechanism, due to severe flexion gap imbalance, leading to subsequent posterior dislocation of the hinge and anterior knee dislocation, in a patient with a history of multiple total knee arthroplasty revisions. This case suggests the importance of the soft tissue balancing, the adequate patellar tracking, and use of a long cylindrical, minimally tapered rotating stem in hinge arthroplasty to minimize hinge dislocation.http://dx.doi.org/10.1155/2013/756538
spellingShingle Givenchy Manzano
Ran Schwarzkopf
Posterior Dislocation of the Hinge-Post Extension in a Rotating Hinge Total Knee Prosthesis
Case Reports in Orthopedics
title Posterior Dislocation of the Hinge-Post Extension in a Rotating Hinge Total Knee Prosthesis
title_full Posterior Dislocation of the Hinge-Post Extension in a Rotating Hinge Total Knee Prosthesis
title_fullStr Posterior Dislocation of the Hinge-Post Extension in a Rotating Hinge Total Knee Prosthesis
title_full_unstemmed Posterior Dislocation of the Hinge-Post Extension in a Rotating Hinge Total Knee Prosthesis
title_short Posterior Dislocation of the Hinge-Post Extension in a Rotating Hinge Total Knee Prosthesis
title_sort posterior dislocation of the hinge post extension in a rotating hinge total knee prosthesis
url http://dx.doi.org/10.1155/2013/756538
work_keys_str_mv AT givenchymanzano posteriordislocationofthehingepostextensioninarotatinghingetotalkneeprosthesis
AT ranschwarzkopf posteriordislocationofthehingepostextensioninarotatinghingetotalkneeprosthesis