Revision of unicompartmental knee arthroplasty using the in situ referencing technique.

Revision of unicompartmental knee arthroplasty using the in situ referencing technique. Oper Orthop Traumatol. 2020 Mar 05;: Authors: Weißenberger M, Petersen N, Bölch S, Rak D, Arnholdt J, Rudert M, Holzapfel BM Abstract OBJECTIVE: Revision of unicompartmental knee arthroplasty (UKA) to total knee arthroplasty (TKA) with the in situ referencing technique aiming to preserve as much ligament function and epi-metaphyseal bone stock as possible. INDICATIONS: Aseptic loosening, progression of osteoarthritis, periprosthetic fracture, periprosthetic infection, arthrofibrosis, polyethylene wear, malalignment, instability, femoro-tibial impingement. CONTRAINDICATIONS: Unexplained pain, localized or systemic active infection (anywhere). SURGICAL TECHNIQUE: Referencing for the tibia and the femur cuts is performed prior to implant removal. The tibial cutting jig and the initial tibial resection level is set in a way that the sawblade just fits under the tibial implant. In case too much bone needs to be removed to achieve flush implant sitting on both the medial and lateral tibia, a step cut needs to be performed to build up the medial defect with an augment. Prior to femoral component removal, rotational alignment is determined and intramedullary referencing for the distal femur osteotomy is performed. Level of constraint and additional tibial stem fixation is chosen according to the amount of bone resected and acco...
Source: Operative Orthopadie und Traumatologie - Category: Orthopaedics Authors: Tags: Oper Orthop Traumatol Source Type: research