The early postoperative results following Mori's knee joint synovectomy usually gives satisfactory improvemtnt clinically on the operated knee joint.However, in so far as early postoperative improve ment following synovectomy is concerned, radiological evidence to support this clinical improvement has not yet been fully confirmed even in literature.The author collected 10 knee joints in which improvement in clinical findings was obtained and pre- and postoperative radiographs were available for comparison.In these 10 joints radiological findings were as follows. Postoperatively widening of joint line was seen in 10 joints. Postoperative improvement in joint line contour was seen in 4 joints. Therefore, improvement in joint line contour including widening was seen in 4 joints.In this surgical series, most of the joints postoperatively showed the sa me radiological findings as they showed preoperatively.It is very likely, howe ver, that the above radiological findings demonstrate an inhibition of the progression in the disease process in the operated knee joint following surgery and that this demonstrates the success of synovectomy for these patients.As our second study, radiological and clinical data we re studied on a series of patients with bilateral knee joint involvement. The operated knee joint was compared with the contralateral non surgical side. The number of the cases were 17 and the period of follow-up was a mean value of 12.3 years. An investigation was done radiologically using Steinbrocker's or Larsen's method and also clinically using our method of evaluating pain, swelling, ROM, and function in the knee.The following main conclusions were attained.: Preoperatively all the 17 knees were found worse than the opposite non surgical side clinically and radiologically 8 pairs of joints were similar and 9 joints were worse than the contralateral non surgical side. Postoperatively, however, as for the operated 17 knee joints 5 pairs of joints were found to be similar,6 joints were better and only 6 joints were worse than the contralateral non surgical knee.From these findings the author concludes that the presence of a “prophylactic effect” following Mori's knee joint synovectomy has been confirmed.
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