教室20年間に於ける膝関節メニスクス障害

(その1) 統計的観察

抄録

The basic material comprised all the patients who, during the period 1951-1970, were admitted to our department for the injuries of the semilunar cartilage of the knee. The numbers of the injured menisci were 199 in which four have been discarded on account of the lack of data.
In 165 patients the single meniscectomies were undergone while the remaining two had been operated on “double or dual menisci” in the same knee, and the other thirteen had the single meniscectomies in the both knees.
No differences have been found in the side and sex distribution, but ratio lateral to medial 4.6:1 and ratio except discoid type 2.2:1 were represented. The mean age for the entire material was 25.9 years, and the peak was situated in the third decade as the other authors. Trauma clearly associated were proved in one third of the patients and no history of the trauma was also found in one third. Athletic activities as the causative factors tend to increase the medial semilunar injuries.
Five main symptoms were snapping, muscular atrophy, tenderness at the joint space, click, and the disturbance of the motion. The predominant types of the lesions in the menisci were considered to be the degenerative change rather than the rupture or division. The detachment from the capsule in the medial menisci has the higher incidence than to be hitherto described.