TY - JOUR
T1 - Kinematics and laxity of the Souter-Strathclyde total elbow prosthesis
AU - Schneeberger, Alberto G.
AU - King, Graham J.W.
AU - Song, Seok Whan
AU - O'Driscoll, Shawn W.
AU - Morrey, Bernard F.
AU - An, Kai Nan
PY - 2000
Y1 - 2000
N2 - The motion pattern and laxity of 8 cadaveric elbows were recorded with a 3-dimensional electromagnetic tracking device before and after the Souter-Strathclyde total elbow prosthesis was implanted. The Souter-Strathclyde prosthesis replicates the valgus-varus motion pattern of the intact elbow but causes a significant internal rotation of the ulnar shaft of 8.9° ± 4.1° (P < .0005) at 110° of elbow flexion. One of the reasons for this unphysiological motion pattern is positioning of the humeral component in a mean of 5.4° ± 6.4° of external rotation compared with the intact elbow (P = .05). This positioning is related to the design of this device. The Souter-Strathclyde elbow prosthesis has a mean maximum valgus-varus laxity of 6.5° ± 1.5° compared with 4.3° ± 2.3° for the intact elbow (P = .004). This implant is more constrained than previously tested devices, which may explain its relatively higher loosening rate.
AB - The motion pattern and laxity of 8 cadaveric elbows were recorded with a 3-dimensional electromagnetic tracking device before and after the Souter-Strathclyde total elbow prosthesis was implanted. The Souter-Strathclyde prosthesis replicates the valgus-varus motion pattern of the intact elbow but causes a significant internal rotation of the ulnar shaft of 8.9° ± 4.1° (P < .0005) at 110° of elbow flexion. One of the reasons for this unphysiological motion pattern is positioning of the humeral component in a mean of 5.4° ± 6.4° of external rotation compared with the intact elbow (P = .05). This positioning is related to the design of this device. The Souter-Strathclyde elbow prosthesis has a mean maximum valgus-varus laxity of 6.5° ± 1.5° compared with 4.3° ± 2.3° for the intact elbow (P = .004). This implant is more constrained than previously tested devices, which may explain its relatively higher loosening rate.
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U2 - 10.1067/mse.2000.103616
DO - 10.1067/mse.2000.103616
M3 - Article
C2 - 10810692
AN - SCOPUS:0034151081
SN - 1058-2746
VL - 9
SP - 127
EP - 134
JO - Journal of Shoulder and Elbow Surgery
JF - Journal of Shoulder and Elbow Surgery
IS - 2
M1 - 900417
ER -