ABSTRACT
Objective To study the treatment of severe dysfunction of knee joint after trauma and explore the operative indication and method for total knee replacement treating such kind of disease. Methods From June 1997 to June 2004, total knee replacement using total knee prosthesis system was carried out in 21 knees of 18 cases with severe dysfunction of knee joint at late stage after knee replacement treating knee trauma, of which 12 knees in 10 cases with severe traumatic arthritis underwent total knee surface replacement. Seven knees in six cases with traumatic arthritis combined with 20?-40?varus or valgus or 20?-90?fixity flexion deformity and two knees in two cases with completely bony ankylosis were treated with rotation hinged knee joint. All cases were followed up for mean 3.5 years, ranging from six months to seven years. The Hospital for Special Surgery (HSS) knee rating score system was used to evaluate the clinical results. Results Pain relief, function recovery, rectification of knee deformities, stability and muscle power were all poor before operation. But postoperative valuation of pain relief, function recovery, rectification of knee deformities, stability and muscle power showed excellent result in 12 cases, good in seven and fair in two, with excellence rate of 90% and rate of patient satisfaction of 100%. Conclusion The knee replacement is an effective method for treating severe dysfunction of knee joint at late stage after knee replacement treating knee trauma.