Kinematics of semi-constrained total elbow arthroplasty

S. W. O'Driscoll; K. N. An; S. Korinek; B. F. Morrey

doi:10.1302/0301-620x.74b2.1544973

Kinematics of semi-constrained total elbow arthroplasty

S. W. O'Driscoll, K. N. An, S. Korinek, B. F. Morrey

Orthopedic Surgery

Research output: Contribution to journal › Article › peer-review

100 Scopus citations

Abstract

We used 11 cadaver elbows and a three-dimensional electromagnetic tracking device to record elbow movements before and after implantation of a 'loose-hinged' elbow prosthesis (modified Coonrad). During simulated active motion there was a maximum of 2.7° ( ± 1.5°) varus/valgus laxity in the cadaver joints. This increased slightly after total elbow arthroplasty to 3.8° ( ± 1.4°). These values are lower than those recorded for the cadaver joints and for the prostheses at the limits of their varus/valgus displacements, indicating that both behave as 'semi-constrained' joints under physiological conditions. They suggest that the muscles absorb some of the forces and moments that in a constrained prosthesis would be transferred to the prosthesis-bone interface.

Original language	English (US)
Pages (from-to)	297-299
Number of pages	3
Journal	Journal of Bone and Joint Surgery - Series B
Volume	74
Issue number	2
DOIs	https://doi.org/10.1302/0301-620x.74b2.1544973
State	Published - 1992

ASJC Scopus subject areas

Surgery
Orthopedics and Sports Medicine

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AU - Korinek, S.

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AB - We used 11 cadaver elbows and a three-dimensional electromagnetic tracking device to record elbow movements before and after implantation of a 'loose-hinged' elbow prosthesis (modified Coonrad). During simulated active motion there was a maximum of 2.7° ( ± 1.5°) varus/valgus laxity in the cadaver joints. This increased slightly after total elbow arthroplasty to 3.8° ( ± 1.4°). These values are lower than those recorded for the cadaver joints and for the prostheses at the limits of their varus/valgus displacements, indicating that both behave as 'semi-constrained' joints under physiological conditions. They suggest that the muscles absorb some of the forces and moments that in a constrained prosthesis would be transferred to the prosthesis-bone interface.

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Kinematics of semi-constrained total elbow arthroplasty

Abstract

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