An Investigation of Articular Cartilage Degeneration Induced by Compression-Immobilization and Condylar resection of Knee Joint in Rabbits / 대한정형외과학회잡지

Articular cartilage have dual functions of shock absorber and bearing surface in a moving joint. Articular cartilage is avascular, so the chondrocytes in mature adult must receive their nourishment solely from synovial-fluid perfusion, and it is known that alteration of synovial-fluid perfusion causes degeneration of articular cartilage. Now, in orthopedic fields, the corrective cast immobilization and traction is in popular use. In order to study the cartilage changes induced by this long-term cast immobilization and traction, compression-immobilization and condylar resection of knee joint in rabbits were performed, and weekly histoiogic examinations of articular cartilage up to 5 weeks were followed. The observations were as follows: 1. Degenerative changes of articular cartilage were observed respectively with compression-immobilization and condylar resection, and the severity of the histologic changes appeared to be proportional to the duration of compression-immobilization and condylar resection. 2. Earlier degenerative changes of articular cartilage in condylar resection group than in compression-immobilization group were noted, and this earlier degenerative changes in condylar resection group suggests that hemarthrosis may play a role in cartilage degeneration. 3. Histologically unchanged calcific cartilage zone and mildly hypertrophied subchondral bone were noted in compression-immobilization group, but vascular invasion to calcific cartilage zone and subchondral osteoporosis were noted in condylar resection group.

A Case of Fibromatosis Associated with the Skeletal Change in Childhood / 대한정형외과학회잡지

Fibromatosis in childhood is a rare tumor and also prone to aggressive behavior. This tumor may spread to involve contiguous soft parts and osseous structures, but does not metastasize. We experienced a case of fibromatosis in an 12-year-old giri who complained of palpable masses in the region of the right buttock and right foot. The case has been followed for 6-years since February 1973. Bony change has occured even after several attempts of surgical excision but a distant metastasis has not occured.

Osteogenesis Imperfecta / 대한정형외과학회잡지

Osteogenesis imperfecta is a rare affection characterized by fragility of the bones, blue sclerae, and deafness, less freqently by hypermobility of the joints. The etiology is unknown, but it appears to be a mesenchymal defect. A case of osteogenesis imperfecta(tarda form). in a 8 ycar old girl, is presented with a review of the literatures. The chief complaints were bowing deformities of the right upper arm and both lower extremities, stunted growth, blue sclerae, dental defects, weakness of the muscles and pigeon breast. X-Ray showed multiple malunited fractures of the right humerus, both femurs, and bilaterally of tibiae and fibulae.