A new technique for rotational alignment of tibial prosthesis in total knee arthroplasty, 2008, Chinese Journal of reconstructive surgery

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Abstract: Objective To compare the method of determining the rotational alignment of the tibial prosthesis in total knee arthroplasty in ord

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Abstract: Objective To compare the method of determining the rotational alignment of the tibial prosthesis in total knee arthroplasty in order to improve the operation effect and reduce the postoperative complications. Methods from May 2006 to April 2007, 60 patients with knee varus underwent total knee arthroplasty with rotating platform, including a total of 27 males and females, aged from 55 to 78 years old. Randomly divided into two groups, each group of 30 cases. The tibial prosthesis positioning method in operation: A group with tibial tubercle 1/3 line as the anatomical landmarks in B group; 0 ~ 9 degrees of varus knee were treated with tibial tubercle medial margin as anatomic landmarks, 10 ~ 19 degrees in patients with tibial tubercle to the medial margin of the tibial tubercle in 1/3 line line as the standard, more than 20 degrees the patients with tibial tubercle in 1/3 line at. To measure the rotation angle of two groups of polyethylene meniscus gasket. Results after polyethylene cushion rotation angle measurement, A group internal rotation (5.6 + 2.8) degrees, including 0 ~ 9 degrees of varus knee were (8.4 + 3.8) 10 degrees to 19 degrees for patients (3.5 + 2.7) degree, is not less than 20 DEG C for patients (0 + 2.4); B group internal rotation (0 + 1.9) degrees, including 0 ~ 9 degrees of varus knee were (0 + 2.1) 10 degrees to 19 degrees for patients (0 + 2) degree, is not less than 20 DEG C for patients (0 + 1.7) degrees. There was significant difference between the A group and the B group (P < 0.05). There was no significant difference between the B groups (P > 0.05). Conclusion the medial border of the tibial tubercle to the medial 1/3 line is an ideal location for the localization of the tibial prosthesis. The linear localization should be based on the degree of deformity of the knee joint.

 

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