Methods To Maintain The Equal Length Of Lower Limbs In Total Hip Arthroplasty For Unilateral Hip Osteoarthritis

BackgroundHip osteoarthritis is one of the orthopedic common diseases,including primary hip osteoarthritis and secondary osteoarthritis,characterized by degeneration of articular cartilage,and under the cartilage and joint around osteophyte formation,major clinical manifestations of hip joint pain,stiffness and limited activity,resulting in quality of life in patients with serious decline.Total hip arthroplasty(THA)is an effective method of relieving the pain and disability of osteoarthritis of the hip and is widely considered to be one of the successful surgical procedures in modern medicine,but it is not without risks.Leg length extensions(LLD)are very common after total hip arthroplasty(THA),and a length difference of more than 10 mm can cause discomfort,lameness,lower back pain,prosthesis loosening,dislocation and nerve injury in patients.In order to minimize such length differences and avoid postoperative complications,different clinicians will adopt different methods.Before and after surgery,the difference in length of lower limbs can be reliably measured by clinical examination and imaging,but it is much more difficult to assess intraoperatively.ObjectiveBy analyzing and studying two methods of equalizing the length of lower limbs during total hip arthroplasty,a more simple and practical method was obtained to maintain the length of lower limbs during total hip arthroplasty.MethodsFifty-eight patients with unilateral osteoarthritis of the hip joint who underwent total hip arthroplasty in the first affiliated hospital of xinxiang medical college from June 2018 to June 2019 were selected.The patients were randomly divided into two groups,A and B(28 cases in group A and 30 cases in group B),and two methods were used for intraoperative adjustment respectively(group A applied patella touch method,and group B applied intraoperative perspective method).Follow-up 6 months after the operation after oral cavity,the difference in the length of both lower limbs was recorded before and after the operation to observe whether the length of both lower limbs was equal to the length of both,to observe whether the femoral eccentricity was reconstructed after the operation,and to record the hip joint Harris score to evaluate the recovery of hip joint function.Results(1)The postoperative recovery of the lower limbs of 26 patients in group A and 29 patients in group B was of equal length.The comparison between the two groups was not statistically significant(P>0.05),and the operation time of the two groups was statistically significant(P<0.05).(2)Harris and motion of hip joint were significantly improved in both groups 6 months after surgery,and there was no statistical significance in the comparison between the two groups(P>0.05).(3)Postoperative femoral eccentricity was reconstructed in both groups,with statistical significance(P<0.05).ConclusionThrough comparative analysis,it was found that both methods can achieve good results,but patella touch method is more simple,practical and can reduce the operation time,radiation exposure.