The Correlation Study Of Measured Resection And GAP Balancing Techniques In Total Knee Arthroplasty

Background:Total Knee Arthroplasty(TKA)has become the best treatment for the mid and late stage knee osteoarthritis which cannot be treated by non-operative methods.There is no conclusion about which orientation techniques during the operation could have the best femoral rotational osteotomy.Objective:To have a better osteotomy for the femoral rotational alignment,we evaluate the mid-term outcomes of TKA performed using either measured resection or gap balancing techniques.Methods:37 cases(43 knees)underwent TKA with gap balancing technique in Orthopedics Department of Rui Jin Hospital,Shanghai Jiao Tong University School of Medicine,from May 2008 to August 2012,were retrospectively analyzed,including 20 cases(21 knees)used gap balancing technique and another 19 cases(22 knees)used measured resection technique.Besides,2 cases used both techniques.The data of surgery procedures,clinical and functional outcomes,and the degrees of femoral rotational osteotomy were recorded and compared.Results:All cases obtained good clinical effect after TKA(p<0.05).The different scores between measured resection and gap balancing groups,including pre-and post-operatively,showed no significant difference(p>0.05).The average external rotation of 21 knees measured during operation is 4.40 degrees(from 1 degree to 8 degrees).Conclusion: 1.Two groups with 2 to 6 years follow-up obtained good clinical effect after TKA,but showed no significant difference between measured resection and gap balancing.Both techniques during TKA were recommended.2.As the data showed from the average external rotational angle,we suggest the femoral rotational osteotomy should more than 3 degrees.