Knee Arthroplasty
Introduction: Short term functional results of modern bicompartmental knee arthroplasty (BKA) with 2 independent modern implants showed better results than those of total knee arthroplasty (TKA). Conserving 2 cruciate ligaments may explain these results but another hypothesis is that independent adjustment of the rotation of patello-femoral and tibio-femoral implants may optimize knee reconstruction.
Objectives: The aim of our study was to compare the positioning of BKA implants to those of primary TKA in the frontal, sagittal and rotation position.
Methods: Between 2008 and 2014, 35 patients (37 knees) underwent a BKA using a cemented unicompartmental knee arthroplasty (UKA) associated with a cemented patello-femoral arthroplasty (PFA) in the same center using the same surgical technique. This group of patients was matched 1:1 by age, sex, BMI and preoperative morphotype to a patient group operated on a primary posterior stabilized TKA. The mean age of patients was 63 ± 10 years with a mean BMI of 27 ± 4 kg / cm2 and preoperative HKA angle of 173 ± 2. The radiological analysis was performed on a standard x-ray and CT-scan one year after surgery. In the frontal plane, the femoral valgus angle …show more content…
In the axial plane, centering of the patella was best for the BKA group with higher trochlear rotation in the BKA group compared to TKA group.
Conclusions: The results of our study show that the use of a BKA preserves the morphology of the patient especially in the frontal plane preserving the physiological tibial varus and the femoral valgus. Moreover, in the axial plane, the independent adjusting of the rotation of the trochlear implant is possible without compromising the medial tibio-femoral stability. These elements may also explain the good functional results observed with a
Objectives: The aim of our study was to compare the positioning of BKA implants to those of primary TKA in the frontal, sagittal and rotation position.
Methods: Between 2008 and 2014, 35 patients (37 knees) underwent a BKA using a cemented unicompartmental knee arthroplasty (UKA) associated with a cemented patello-femoral arthroplasty (PFA) in the same center using the same surgical technique. This group of patients was matched 1:1 by age, sex, BMI and preoperative morphotype to a patient group operated on a primary posterior stabilized TKA. The mean age of patients was 63 ± 10 years with a mean BMI of 27 ± 4 kg / cm2 and preoperative HKA angle of 173 ± 2. The radiological analysis was performed on a standard x-ray and CT-scan one year after surgery. In the frontal plane, the femoral valgus angle …show more content…
In the axial plane, centering of the patella was best for the BKA group with higher trochlear rotation in the BKA group compared to TKA group.
Conclusions: The results of our study show that the use of a BKA preserves the morphology of the patient especially in the frontal plane preserving the physiological tibial varus and the femoral valgus. Moreover, in the axial plane, the independent adjusting of the rotation of the trochlear implant is possible without compromising the medial tibio-femoral stability. These elements may also explain the good functional results observed with a