DIGITAL AND “CT-BASED” PLANNING IN TOTAL KNEE PROSTHESIS USING PATIENT SPECIFIC INSTRUMENTATION: A PROSPECTIVE STUDY

INTRODUCTIONA preoperative planning for accurately predicting the size and alignment of the prosthetic components may allow to perform a precise, efficient and reproducible total knee replacement. The planning can be carried out using as a support digital radiographic images or CT images with three-dimensional reconstruction. Aim of this prospective study is to evaluate and compare the accuracy of two different types of pre-operative planning, in determining the size of the femoral and tibial component in total knee arthroplasty performed with Patient Specific Instrument (PSI). The two compared techniques were: digital radiography and “CT-Based”.MATERIALS AND METHODSA prospective study was conducted to compare the accuracy in predicting the size of the prosthetic components in total knee replacement in 71 patients diagnosed with primary and symptomatic osteoarthritis of the knee. Inclusion criteria was “Easy Knee”: BMI ≤ 35, varus/valgus deviation ≤15° and residual flexion of the knee ≥ 90°. Pre-operative...