Correlation of Patellar Bone Deviation on the Range of Motion after Total Knee Arthroplasty

IntroductionThis study aimed to compare the improvement of the activity content and pain reduction in patients with patella displacement after total knee arthroplasty surgery with and without correction. MethodsThis study was conducted on all patients over ۱۸ years of age refer to Baqiyatallah Hospital suffering from patella displacement, on patellar view radiography, were candidates for knee joint replacement, and underwent joint replacement. Thirty-five patients with deviation and required removal of the patella bone, whose problem was corrected after total knee joint replacement, with ۳۵ patients whose deviation and displacement of the patellar bone was not restored after total knee joint replacement. Reducing the VAS and improve the range of motion (ROM) was assessed in the follow-up periods of ۱, ۲, and ۴ months postoperative. Evaluation of the presence of deviation and displacement of the patella and its correction was done based on the radiograph of the patella view at an angle of ۹۰ degrees.ResultsIn examining the range of motion, the results showed that the patients in the cases and control before surgery had no significant difference in the range of motion (P=۰.۰۰۱). This is while a statistically significant difference was reported in the patient's range of motion between the two groups at one month, two months, and four months after surgery (P=۰.۰۰۱). The average pain before surgery was similar in the two groups (P=۰.۹۵۳). The average pain in one, two, and four months after surgery in the modified group was lower than in the non-modified group (P=۰.۰۰۱).ConclusionThis study showed that the range of motion in the modified group was higher one month, two months, and four months after surgery. Also, the average pain one, two, and four months after surgery in the modified group was lower than in the unmodified group.