Comparative Study: Total Knee Arthroplasty After HTO vs Primary

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Background: here is little information on whether patients who are converted to knee arthroplasty after previous high tibial osteotomy (HTO) differ from those who are operated on by a knee arthroplasty as the first measure regarding patient characteristics, pre- and postoperative motion, function, and satisfaction with the surgery.

Objectives: The purpose of this study was to evaluate and compare the satisfaction, cost and functional results between both knees of patients who had undergone total knee arthroplasty (TKA) following a HTO for one knee, and primary TKA for the other.

Study Design & Methods: 19 patients who had undergone total knee arthroplasty following an HTO for one knee, and primary TKA for the other were included in the study. Pre and post-operative knee range of motions and Hospital for Special Surgery (HSS) knee scores, recorded in patient files were …show more content…

The average age of the patients was 68,89 (58-86). Preoperative knee flexion measurements of the patients treated with TKA after HTO was significantly lower compared to the group treated with primary TKA (p =0,01). There was no statistically significant difference between the two groups when postoperative knee flexion measurements were compared. (p = 0,21). Measurements of preoperative HSS scores of the patients treated with primary TKA was significantly higher than the patients treated with TKA after HTO. In the group of patients who were applied primary TKA, postoperative HSS scores were higher; however the difference was not statistically significant (p = 0,175). Satisfaction scores, based on the results of postoperative satisfaction surveys, was higher in primary TKA group compared to the scores of patients who had previously undergone HTO surgery. Cost values obtained according to the applied prostheses was lower in primary TKA group, but this difference was not statistically significant (p=

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