Abstract
Abstract
Objective
To investigate the clinical outcome of patients that underwent conversion of a medial unicondylar knee arthroplasty (UKA) to a total knee arthroplasty (TKA) and to compare that outcome to patients that underwent primary TKA. It was hypothesized that those groups would significantly differ in terms of knee score outcome and implant survival.
Methods
A retrospective-comparative study was conducted utilizing data from the Federal state’s arthroplasty registry. Included were patients from our department that undergone a conversion of a medial UKA to a TKA (UKA-TKA group). The Western Ontario and MacMaster Universities Osteoarthritis Index (WOMAC) from preoperative and 1-year postoperative was used. Moreover, the implant survival was analyzed.
Results
In the UKA-TKA group, there were 51 cases (age 67 ± 10, 74% women), and in the TKA group, there were 2247 cases (age 69 ± 9, 66% women). The one-year postoperative WOMAC total score was 33 in the UKA-TKA group und 21 in the TKA group (p < 0.001). Similarly, the WOMAC pain, WOMAC stiffness, and WOMAC function scores were significantly worse in the UKA-TKA. After 5 years, the survival rates were 82% and 95% (p = 0.001). The 10-years prosthesis survival was 74% and 91% in the UKA-TKA and TKA groups, respectively (p < 0.001).
Conclusions
Based on our findings it is concluded that patients who received a TKA after UKA have inferior results than those that directly receive a TKA. This is true for both patient-reported knee outcome and prosthesis survival. Converting UKA to TKA should not be seen as an easy operation, but should rather be done by surgeons with considerable experience in both primary and revision knee arthroplasty.
Funder
University of Innsbruck and Medical University of Innsbruck
Publisher
Springer Science and Business Media LLC
Subject
Orthopedics and Sports Medicine,General Medicine,Surgery,Surgery
Reference35 articles.
1. Tay ML, McGlashan SR, Monk AP, Young SW (2022) Revision indications for medial unicompartmental knee arthroplasty: a systematic review. Arch Orthop Trauma Surg 142(2):301–314
2. Grabherr M, Dimitriou D, Schraknepper J, Helmy N, Flury A (2022) Hybrid fixation of unicompartmental knee arthroplasty shows equivalent short-term implant survivorship and clinical scores compared to standard fixation techniques. Arch Orthop Trauma Surg. https://doi.org/10.1007/s00402-022-04710-z. (Epub ahead of print)
3. Barrett WP, Scott RD (1987) Revision of failed unicondylar unicompartmental knee arthroplasty. J Bone Joint Surg Am 69:1328–1335
4. Becker R, John M, Neumann WH (2004) Clinical outcomes in the revision of unicondylar arthoplasties to bicondylar arthroplasties. A matched-pair study. Arch Orthop Trauma Surg 124:702–707
5. Bellamy N, Buchanan WW, Goldsmith CH, Campbell J, Stitt LW (1988) Validation study of WOMAC: a health status instrument for measuring clinically important patient relevant outcomes to antirheumatic drug therapy in patients with osteoarthritis of the hip or knee. J Rheumatol 15:1833–1840
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