Osteonecrosis of the femoral head in spontaneously hypertensive rats. Relation to ossific nuclei during growth.
We observed the distribution of the ossific nuclei and the occurrence of osteonecrosis in the femoral capital epiphysis of spontaneously hypertensive rats. In 270 femoral heads, the ossific nuclei were seen in the following sites of the epiphysis: Type 1, the lateral portion in 150 femoral heads; Type 2, the central portion in 5 heads; Type 3, both lateral and central portions in 12 heads; and Type 4, throughout the epiphysis in 62 heads. The number of femoral heads with osteonecrosis in Types 1-4 was 61, 0, 5, and 17, respectively.
Hirano
T
T
Department of Orthopedics, Nagasaki University School of Medicine, Japan.
Iwasaki
K
K
Oda
J
J
Kumashiro
T
T
D000375:Aging / Q000502:physiology; D000818:Animals; D005270:Femur Head / Q000254:growth & development / Q000473:pathology*; D005271:Femur Head Necrosis / Q000473:pathology* / Q000503:physiopathology; D008297:Male; D010012:Osteogenesis; D051381:Rats; D011918:Rats, Inbred SHR