P-3-06-06
ULTRASOUND BONE DENSITOMETRY OF THE OS CALSIS IN RELATION TO VERTEBRAL FRACTURE AND DAILY LOCOMOTION ACTIVITY
Jun Yamaguchi-1), H. Murao-1), S. Ikehara-1), Y. Shimada-1), N. Kohashi-2), Y. Kumon-2)
(1-Rehabilitation Center, Osaka Medical College, Osaka, and 2-Tekiju Rehabilitation Hospital, Kobe, Japan)
To investigate the relation of calcaneal bone atrophy to vertebral fracture and daily locomotion activity, we applied the ultrasound bone densitometry of the os calcis to osteoporotic patients in a rehabilitation hospital.
All subjects were Japanese females: 44 normal subjects for control, and 127 patients with senile osteoporosis suffering from chronic low back pain were studied. In each subject, speed of sound (SOS) and broadband ultrasound attenuation (BUA) of the os calcis were measured with Achilles ultrasound bone densitometer (Ver. 1.5c, Lunar Corp., Madison, WI), and "Stiffness", an index of calcaneal bone atrophy, was defined from SOS and BUA. In this study, we examined the relation of Stiffness value to old compression fractures in vertebrae and daily locomotion activity.
The mean Stiffness value (% Age Matched) of the osteoporotic patients was significantly lower than that of the normal control (p<0.01), and the mean value of the osteoporotic patients with old vertebral fracture was significantly lower than that without fracture (p<0.01). As for the daily locomotion activity, the value of the inpatients was significantly lower than that of the outpatients (p<0.01). The value of the patients with wheelchair activity was significantly lower than that with cane gait, and the value with cane gait was significantly lower than that with independent gait (p<0.01). There were statistically significant difference among the wheelchair activity, the cane gait, and the independent gait, respectively (p<0.01).
These suggest that ultrasound bone densitimetry of the os calcis, which may fairly reflect the presence of old vertebral fracture and the state of daily locomotion activity, will be very useful both for risk-diagnosis of vertebral fracture and for rehabilitation program in osteoporosis.
P-3-06-07
DEGENERATIVE CHANGES OF THE HIP JOINT AFTER THE BLOW
Igor Y. Ejov, Yuri I. Nushuyev (Nizhny Novgorod Researcher Institute of Traumatology and Orthopaedics, Nizhny Novgorod, Russia)
We had 48 rabbits in four series. We directed the dose blow to the great trochanter or to the femur head, but its anatomical structure was left. The animal killed after operation at 3-7-14-30 days and 3-6-9 months. Mechanical injuries of acetabular cartilage were seen less than injuries of head cartilage and their strength corresponded to that of head injuries. Necroses were not only in the regions of blow on the head but on the opposite regions as well; they were not only in the peripheral regions but in the centre regions as well. The changes of the bone of head, neck and great trochanter included small distructions of the subchondral bone plate, reduction of spongy bone, transformation of red marrow into fat marrow, abundance of full bloodstream and haemorrhage. Besides these were hypertrophy of some chondrocytes near necroses, proliferation with forming of ten and more chondrocytes in one acpsule, forming of perichondrium with cells looking like fibroblasts and fibrocytes. Sometimes perichonrium was seen at all surfaces of necrosis and defects. We didn't find any filling up even so small defects by new cartilage tissue. Sometimes there were rough connective tissue in the defects near the distruction area of subchondral bone plate.
