We used β-TCP (β-tricalcium phosphate) which is an absorbent, artificial bone filling material of absorption nature for various kinds of disorders on 8 patients, and good results were obtained. Two men and 6 women with a mean age of 61.9 years (range: 29-83 years) were treated. The breakdown of the disorders are as follows; 2 hip central migrations, 2 femur fractures after THA, 2 lumbar spine posterolateral fusions, 1 avascular necrosis of the femoral head, and 1 enchondroma of the phalanx. The follow-up period ranged from 4 months to 2 years (average: 1 year). β-TCP was absorbed in several months, to serve as a self bone substitut, and enough synostosis was provided. Complications such as heterotopic ossification or foreign body reaction were not noted. With the exception of the phalanx, we used it for load part this series, but enough synostosis is provided both. These results suggest that β-TCP is an ideal artificial bone filling material.
