Jiang C C, Liu C S, Wen C Y, Liu T K
Department of Orthopaedic Surgery, College of Medicine, National Taiwan University, Taipei, R.O.C.
Proc Natl Sci Counc Repub China B. 1994 Apr;18(2):53-7.
Restriction of knee motion after total knee replacement was noted to be associated with lengthening of the posterior cruciate ligament during flexion of the knee which was replaced with a cruciate retaining knee prosthesis. The purpose of this study was to measure the excursion length of the PCL in the normal knee in four different cruciate-retaining knee prostheses, and in five cadaveric knees which were replaced with the Tricon prosthesis. For every knee, the tibial part was fixed on a stand and the femoral part was allowed to do flexion-extension motion upon the tibial plateau. The angle of the motion was monitored by the self-readout goniometer. A thin wire cord was attached to the proposed origin site of the PCL on the femur. The wire cord was passed through a tiny hook which was attached to the proposed insertion site of the PCL on the tibia and connected to a dial gauge. The excursion length of the PCL during 90 degrees flexion was measured. The same measurement was repeated five times in each cadaver knee and prosthetic knee studied, and in five knee specimens which were replaced with the Tricon prosthesis. The excursion length of the PCL during 0 degrees to 90 degrees of flexion in five cadaver knees averaged 0.08cm of lengthening. Three different origin sites of the ligament were designated to represent the anterior, middle and posterior part of the ligament.(ABSTRACT TRUNCATED AT 250 WORDS)
全膝关节置换术后膝关节活动受限被认为与使用保留交叉韧带的膝关节假体时膝关节屈曲过程中后交叉韧带延长有关。本研究的目的是测量正常膝关节中四种不同保留交叉韧带的膝关节假体以及五个用Tricon假体置换的尸体膝关节中后交叉韧带的偏移长度。对于每个膝关节，将胫骨部分固定在支架上，使股骨部分在胫骨平台上进行屈伸运动。运动角度由自读式角度计监测。一根细钢丝绳连接到股骨上后交叉韧带的预定起始部位。钢丝绳穿过一个微小的钩子，该钩子连接到胫骨上后交叉韧带的预定插入部位，并与一个刻度盘相连。测量90度屈曲时后交叉韧带的偏移长度。在每个研究的尸体膝关节和假体膝关节以及五个用Tricon假体置换的膝关节标本中，对相同的测量重复进行五次。五个尸体膝关节在0度至90度屈曲过程中后交叉韧带的偏移长度平均延长0.08厘米。韧带的三个不同起始部位被指定代表韧带的前部、中部和后部。（摘要截短至250字）
