[Briard's sagittal sliding osteotomy of the lateral condyle in total knee arthoplasty of the severe valgus knee]

D Bremer, B C Orth, J G Fitzek, A Knutsen
Operative Orthopädie und Traumatologie 2012, 24 (2): 95-108

OBJECTIVE: Distalization of the insertion of the lateral collateral ligament and popliteus tendon by sliding osteotomy of the lateral femur condyle in order to correct a residual contracture in extension in total knee arthroplasty (TKA) of the severe valgus deformity.

INDICATIONS: Genuine and other valgus deformity of the knee.

CONTRAINDICATIONS: Severe laxity of the medial collateral ligament; common contraindications of joint replacement.

SURGICAL TECHNIQUE: Lateral parapatellar approach and stepwise osteotomy of the tubercle of the tibia, subperiostal release of the lateral contracted structures such as iliotibial band (ITB) and lateral collateral ligament (LCL) in flexion. Tibia first technique, verification of a balanced and stable flexion gap parallel to the epicondylar line. Posterior cruciate ligament (PCL) is preserved. Referencing of the distal femoral cut by a spacer filled only in the medial extension gap. Finishing femoral chamfer cuts. If extension gap remains trapezoidal, further release of the residual lateral contracted structures in extension by means of sliding osteotomy of the lateral condyle and subperiostal release of the capsule and the lateral septum intermusculare is required. Termporary fixation of the lateral condyle by K-wires, resection of the bony excess, trial of test components, definite screw fixation.

POSTOPERATIVE MANAGEMENT: Comparable to TKA in varus deformities by a medioparapatellar approach.

RESULTS: A total of 79 patients (61 women, 18 men, average age 71 years at the time of surgery) with fixed valgus deformities were operated between June 2001 and December 2010 using TKA and sliding osteotomy of the lateral femoral condyle. The preoperative valgus angle under defined valgus and varus stress was 19.5° (8-40), postoperative 4.7° (2-11). Mean medial angle (valgus stress) of the follow-up was 2.1° (0.5-5°), lateral angle (varus stress) 2.3° (0.5-5°). A total of 35 patients were followed-up, at a mean of 73.3 month (24-109 months). The postoperative Knee Society Score was 95 points (56-100 points), while the postoperative Function Score was 90 points (55-100 points) postoperatively. The Oxford Score improved from 22 points (3-43 points) preoperatively to 45 points (21-48 points) postoperatively. One knee had to be revised due to infection, one knee due to non-union of the tibial tubercle. Finally, there were 3 cases with complications associated with the procedure due to the sliding osteotomy of the lateral femoral condyle; all were revised successfully. No conversion to a semi-constrained or constrained knee prosthesis was necessary.

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