Effect Of Anterior Condylar Height On Early Results After Total Knee Arthroplasty

Objective::To evaluate the effect of the change of the anterior femoral condyle offset(ACO)after total knee arthroplasty(TKA)on the early knee function.Methods: A retrospective study was conducted on 120 patients with severe osteoarthritis of the knee who received total knee arthroplasty in the department of joint of the third hospital of hebei medical university from November 2017 to May 2018.The patients were followed up for 10-14 months(mean 12 months).According to ACO change(preoperative ACO-postoperative ACO),the patients were divided into groups with change value ≥ 0mm(54 patients aged 54-75 years,with an average age of 62.87 years)and groups with change value< 0mm(66 patients aged 56-74 years,with an average age of 62.67 years).1 year after surgery were compared between the two groups.The clinical evaluation indexes of Rang of motion(ROM),Western Ontario and Mc Master Universities(WOMAC)osteoarthritis index score,forgotten joint scores(FJS),Feller’s patella score and imaging variable ACO changes.Pearson linear correlation was used to analyze the correlation between the change value of ACO and the improvement value of ACO clinical evaluation index.Results: a total of 120 cases were included,and the ACO values of the group with change value ≥0mm and the group with change value < 0mm were(1.41±1.24)mm and(-1.43±0.88)mm,respectively.There was no significant difference in WOMAC score,Feller’s patella score,ROM and index improvement between the two groups 1 year after surgery.FJS(82.70±5.62)in the group with a change value ≥0mm was significantly better than that in the group with a change value< 0mm(78.52±6.43).The difference between the two groups was statis tically significant(t=3.71,P =0.000).The ACO change value was positively correlated with FJS score(r=0.366,P < 0.01).Conclusions: The change of ACO has no significant effect on the objective functional indexes such as WOMAC and Feller’s patella score after TKA,but the increase of ACO will reduce the FJS score of the patient’s supervisor score and increase the patient’s postoperative dissatisfaction.