[Outcomes of TKR by Cementless LCS Total Endoprosthesis.]

Authors of the article present the results of TKR by LCS cementless prosthesis manufactured by DePuy.This system is aimed at reducing stress concentration between femoral and tibial components in order to minimise the polyethylene wear. This is achieved by the increase of constraint between polyethylene insert and femoral component and at the same time by facilitating the defined motion between the insert and the metal tibial component by the system of mobile bearings. In the period 1992 through 1997 the implant was used at 1 st Orthopaedic Clinic of 1 st Medical Faculty, Charles University in Prague as a joint replacement in 63 cases in 56 patients. In 12 cases (19 %) we used prosthesis retaining posterior cruciate ligament with meniscal bearings and in 51 cases (81 %) a PCL sacrificing system, with a rotating platform. The evaluation of results started minimum one year after the surgery, in seven patients the period of follow-up was 5 years. The resulting average motion range in the group of patients is 0 degrees -105 degrees . After arthroplasty the joint is classified as stable in 61 cases, in two cases slight instability is persisting. Radiograph does not show in any of the patients signs of loosening of components or infection. In 5 patients there persists patellar pain. No other complications were encountered. We also evaluated our results using New Jersey Orthopaedics Hospital Knee Evaluation System: the result of surgeries was evaluated in the multicentric study of LCS system in the USA. Excellent result was achieved in 51 cases (80,9 %), good in 10 cases (15,8 %) and satisfactory in 2 patients (3,3 %).The authors consider the LCS system as one of the best among the existing TKR systems. Key words: total Replacement, LCS.