The Evaluation of Single-Sided Total Knee Arthroplasty Versus Simultaneous Bilateral Total Knee Arthroplasty
Arielle Harnik1, Jay Boughanem1, Patrick Hart1
1Division of Surgery, Hilo Medical Center (Ms. Harnik, Dr. Boughanem, Mr. Margolin, Mr. Collins, and Mr. Hilton); Hilo Bone and Joint Clinic (Ms. Harnik, Dr. Boughanem, Mr. Margolin, Mr. Collins, and Mr. Hilton); and University of Hawaii at Hilo, Hilo, HI (Dr. Hart).
Introduction:
Both graduated single-sided total knee arthroplasty (SSTKA) and simultaneous bilateral total knee arthroplasty (SBTKA) are viable options for bilateral knee arthritis, and deciding which option to pursue is still debated. We aim to compare the two modalities using the patient-based oxford knee score and Visual analog pain scores in micropolitan settings.
Methods:
Oxford knee score and Visual analog pain scores were administered preoperatively and postoperatively 1, 6, and 12 months to 115 patients who underwent total knee arthroplasty. The 115 cohort was divided into two groups, those who underwent SSTKA and those who received SBTKA.
Results:
Cross-group analysis showed a significant difference with oxford scores at the 1-month postoperative interval (P = 0.026). The within-group analysis of the delta oxford knee scores displayed postoperative improvement at the 0.05 level of significance at 1, 6, and 12 months.
Discussion:
This study indicates that the patient-based outcome measures for the SBTKA group lagged behind the SSTKA group. The overall improvement a year out from surgery is comparable, and both groups had significant improvement in function. The SBTKA patient group had markedly lower functional outcome measures based on oxford scores at 1 month post-op compared with the SSTKA group; this may help in decision-making and patient selection.
