Anatomical and Biomechanical Study of Combined Reconstruction in the Treatment of III° Posterior Cruciate Ligament Injury

Objective: (1) To establish a III°PCL injury model on fresh cadaver knee specimens, and to define the pathological and anatomical connotation of III°PCL injury by using anatomical methods.

(2) To explore and establish combined reconstruction techniques, including PCL reconstruction combined with injury repair and reconstruction, and to explore the role of combined reconstruction techniques in maintaining knee stability through biomechanical experiments.

Design: ① The subjects of this study were fresh cadaver knee specimens.

• Sample size:

A Anatomical study of injury model, planning 6 cases. B. Exploration of treatment methods for complicated injuries. 8 cases of specimens are planned to be used. According to the pathological and anatomical content of III°PCL injury (IKDC standard), the repair and reconstruction techniques of combined injury were designed. Arthroscopic transtibial single-bundle PCL reconstruction technique was used in all the reconstruction of PCL. Using the robotic arm or universal sensor test system as the biomechanical test platform, Biomechanical tests were carried out on the experimental specimens, and the results were compared to determine the shortcomings of the new PCL reconstruction, according to which the surgical procedures were improved, and then the biomechanical tests were carried out. After repeated technical improvement (4 cycles, 2 specimens per cycle), the new PCL reconstruction technique was finally determined.