Comparison of total knee arthroplasty and unicompartmental knee arthroplasty in patients with osteoarthritis of knee in single compartment

Abstract

Objective To investigate the result of total knee arthroplasty (TKA) versus unicompartmental knee arthroplasty (UKA) in the treatment of isolated compartmental osteoarthritis of knee. Methods From March 2012 to March 2015, the clinical data of the single compartment osteoarthritis patients underwent TKA and UKA with follow-up were retrospectively studied. According to different surgical methods, the TKA group contained 48 patients (48 knees), the UKA group contained 40 patients (40 knees). Patients evaluation focused on operative time, blood loss, postoperative drainage, the amount of postoperative 1d, 3d, 1w hemoglobin, the decline of postoperative 3 d hemoglobin and the last follow-up of motion and efficacy(Hospital for Special Surgery, HSS). Results The patients in the two groups were operated successfully. Eighty-eight patients were followed up from 6 to 36 months, an average of 20.25 months. The operation time of TKA group [(85.77±7.61)min] was longer than that in the UKA group [(80.50±6.82)min], the blood loss of TKA group[(103.54±17.68)mL] was more than that in the UKA group [(74.75±11.82)mL], the postoperative drainage of TKA group [(420.21±68.80)mL] was more than that in the UKA group [(241.75±53.05)mL], the differences were all statistically significant (t=3.389, t′=8.787, t′=13.411, all P values 0.05), the amount of postoperative 1 d, 3 d, 1 week were more in UKA than TKA, and the amount of postoperative 3 d hemoglobin decreased were less in UKA than TKA, the differences were statistically significant (P 90°after operation were less in the UKA group[(12.63±3.10)d] than those in the TKA group[(7.33±3.02)d](t=8.086, P 0.05). Only one case had deep vein thrombosis in TKA group, but recovered after intervention treatment. The remaining patients had no complications. Conclusions For the treatment of isolated compartmental osteoarthritis of knee, UKA can a chieve good results as well as TKA, but it has less blood loss, shorter operative time and more rapid postoperative recovery than TKA. Key words: Osteoarthritis, knee; Arthroplasty, replacement, knee; Tunicompartmental knee arthroplasty; Single compartment osteoarthritis