Objective To investigate a modified robotized hydraulictensor for management of the ligament balance in the total knee arthroplasty. Methods The effect of the modified robotized hydraulic tensor on the mechanical behaviour of the ligament system balance in the total knee arthroplasty was analyzed andthe related information was obtained. Results The robotized hydraulic tensor acted as a tensorsensor system, which could assist the surgeon by providing thequantitative information to align the lower limb in extension, equalize the articular spaces in extension and flexion, balance the internal and external forces, and define the femoral component rotation, and by providing the information toplan the releasing of the soft tissues and the rotating of the femoral component. Conclusion The modified robotized hydraulic tensor can enable the surgeon to properly manage the ligament balance in the total knee arthroplasty.
To fix the ligaments, tendons or other transplantation materials by passing through bone channels was commonly used and a relialde method in the reconstruction of joint stability. Usually an additional incision was necessary on the side of the outlet of the bone channel, that the screws, plates or U-shaped staple could be applied. An instrument was designed that the steel miniplate could be fixed to the bone by noninvasive method. This technique was applied in 20 cases in which anterior cruciate ligament in 14, posterior cruciate ligament in 4, and collateral ligaments in 2 with carbon fibers. The result was successful in all patients. It was shown that it gave simple manipulation, reliable fixation and no need to have an additional incision, and it could lessen patients’ suffering and lead to satisfactory clinical result.
Fourteen patients with anterior cruciate ligament (ACL) injuries were treated with carbon fiber—superficial fascia complex and were followed up with an average of 25 months. The overall results in our series were excellent or good. The patients had stable knees and few had some subjective complaints. The influence on the knee function after injury of ACL was discussed.
Objective To review the recent anatomy and biomechanical research progress of knee posteromedial corner, to analyze deficient aspect, and to predict future research directions. Methods Domestic and international l iterature about the anatomy and function of knee posteromedial corner in recent years was reviewed extensively, at the same time, the biomechanics of corresponding structure was summarized and analyzed. Results The anatomical structures ofknee posteromedial corner included the static stabil ity structures and the dynamic stabil ity structures. The dynamic stabil ity structures were more important, including posterior root of medial meniscus, posterior obl ique l igament, semimembranosus extensions, meniscotibial l igament and obl ique popl iteal l igament. The posterior obl ique l igament was most important structure to contribute to stabil ization of valgus, anterior internal rotation of knee and posterior movement of tibia. Conclusion Anatomical reconstruction of knee posteromedial corner especially the posterior obl ique l igament is the key to the reconstruction of knee posteromedial function stabil ity.
BJECTIVE: To study the effect of transposition of great adductor muscular tendon pedicled vessels in repairing the medial collateral ligament defect of knee joint. METHODS: From September 1991 to September 1999, on the basis study of applied anatomy, 30 patients with the medial collateral ligament defect were repaired with great adductor muscular tendon transposition pedicled vessels. Among them, there were 28 males and 2 females, aged 26 years in average. RESULTS: Followed up for 17 to 60 months, 93.3% patients reached excellent or good grades. No case fell into the poor grade. CONCLUSION: Because the great adductor muscular tendon is adjacent to the knee joint and similar to the knee ligament, it is appropriate to repair knee ligament. Transposition of the great adductor muscular tendon pedicled vessels is effective in the reconstruction of the medial collateral ligament defect of knee joint.