Isometric Point Selection Of The Anterior Caiciate Ligament

Study design:Through the anatomy of healthy adult knee joint specimens,the study of long-point selection for knee anterior cruciate ligament reconstruction.Objective:To observe and study the anterior cruciate ligament(ACL)femoral end point in healthy adult specimens,and to collect and analyze the relevant data to provide a basis for the accurate positioning of the knee anterior cruciate ligament femoral end..Summary of background data:The anterior cruciate ligament plays an important role in the knee joint.After ACL injury,conservative treatment can be selected for some patients with mild symptoms.For patients with severe injury,anterior cruciate ligament reconstruction is a more conventional procedure..The choice of the same length of the femoral end during surgery is critical to the postoperative outcome.Many scholars have studied the selection of equal length points.However,to date,few scholars have studied the anterior cruciate ligament femoral stagnation points of healthy adult knee joint specimens.The purpose of this study was to select the autopsy of the knees of healthy adult specimens and to study the different points of the anterior cruciate ligament(ACL)femoral end points,so as to provide a basis for the actual clinical reconstruction of the knee anterior cruciate ligament femoral stop.Research methods:8 healthy adult specimens were obtained from formalin.The specimens were provided by the Department of Anatomy,Suzhou University,including 4 cases of left knee joint and 4 cases of right knee joint.All specimens had no obvious trauma or degeneration in the knee joint.The upper part of the knee joint retains at least 20 cm of the femur,and the lower section is completely preserved.The conventional knee anterior cruciate ligament replacement was simulated.After the anterior cruciate ligament was removed under direct vision,the shape of the anterior cruciate ligament was observed at the femoral stop.Five test points were selected at the anterior cruciate ligament femoral attachment point,which were anterior,posterior,middle,and up and down.The femoral ends of the LARS ligament were fixed at the above five measurement points,the humeral end was not fixed,and the LARS ligament was taken out from the tibia attachment point and connected to a spring dynamometer.Passively active knee joints,ranging from 0° to 120°,were observed for changes in the length of the five-point LARS ligament,and the relevant data were measured and recorded.Research results:The test results are shown in the attached table and figure.The data of each test point(front,back,middle,upper and lower)were analyzed by ANOVA.The statistical results were significantly different(P<0.05).The results showed that each test point(front,back,middle,upper and lower)was in the knee joint.The length of the inner LARS ligament is unequal with the change in the angle of motion of the knee joint.At the same angle of knee joint activity,the length of the LARS ligament in the knee joint was also statistically significant(P<0.05).The results showed that the same angle,the length of the LARS ligament in the joint of different test points changed differently.It can be seen from the figure that the LARS ligament is stretched before the knee joint flexion before the test point,at the test point,and at the test point.The front test point changes the most,gradually rising from 0° to 80°,and the maximum at 80°.There is a drop.The trend of the lower test point is comparable to that before the test point,gradually rising from 0° to 80°,maximum at 80°,then slightly decreased,and slightly increased at 110°.The change in the test point is small,basically in a stable state,reaching a maximum at 80°.The trend of change at the test point and after the test point is completely opposite to the above test point.When the knee is bent,the length of the LARS ligament is shortened,and the shortest at 70°,then rises steadily.Research conclusion:The isometric point is not a point and should be a face.The absolute equidistance point in the ideal does not exist,only the relative length.In the anterior cruciate ligament reconstruction,the hole should be drilled near the midpoint of the anterior cruciate ligament attachment point.However,the position should be adjusted according to the actual situation of the patient during the operation.After the operation is completed,the knee joint should be passively operated,and the tension and relaxation of the ligament should be observed under direct vision to achieve the desired surgical results.