@article{oai:nagasaki-u.repo.nii.ac.jp:00022061,
 author = {Teshima, Kitau},
 issue = {1-3},
 journal = {Acta medica Nagasakiensia},
 month = {Oct},
 note = {In order to clarify the role of the hip abduction force in the occurrence and development of the secondary osteoarthritis (OA) of the hip, isometric hip abduction force and electromyographic (EMG) activities of the muscles around hip were measured simultaneously in 64 hips of 44 female patients. All hips were classified according to radiological criteria of Japanese Orthopedic Association (JOA), and these were 13 hips in the group of preosteoarthritis (pre-OA) stage, 16 hips in early stage, 24 hips in advanced stage and 11 hips in terminal stage. Condition of each hip was evaluated with JOA hip score clinically, with CE angle, and lateral and upward displacement of the femoral head radiologically, and with crosssectional area of the gluteal muscles in computed tomogram. As control 32 normal hips including opposite side were used. The maximum abduction force showed no significant difference among the group of control, pre-OA, early, and advanced stage, while significant decrease was noted in terminal stage. In EMG activities of muscle around hip, there was no significant difference among the OA stage group. JOA score and CE angle decreased with the progress of the OA stage. Femoral head showed lateral displacement in the stages up to advanced stage and upward displacement in terminal stage. Gluteus medius muscle had kept its normal cross-sectional area by the advanced stage, and decreased it at the terminal stage. In conclusion, it was suggested that the occurrence and development of the osteoarthritic changes by the advanced stage in dysplastic hip was not due to the decrease of the hip abduction muscle force., Acta medica Nagasakiensia. 1994, 39(1-3), p.21-30},
 pages = {21--30},
 title = {Hip Abduction Muscle Force in Osteoarthritis of the Hip},
 volume = {39},
 year = {1994}
}