| 摘要 |
<p>PURPOSE:To effectively disperse stresses and to maintain the modification of a bone over a long period of time by forming the surface of an artificial bone to be joined in the form of adhesion of connective tissues (sharpey's fibers) to the intrinsic bone to a corrugated cylindrical form alternately formed with build-up parts and recessed parts. CONSTITUTION:The build-up parts 2 and recessed parts 3 are alternately disposed on the surface of the stem of an artificial thigh joint 1 to form the surface to the corrugated form as a whole. The stem is formed to the corrugated cylindrical shape in such a manner, by which the direct transmission of stresses from the artificial bone to the surrounding bones is averted and the stress dispersion and homoquenty to the surrounding bones are effectively attained. As a result, a promating effect on extremely thin fibrous tissues of the living body around the artificial bone is obtd, and the artificial bone is stably fixed in the body; in addition, the neogenesis and modification of the bone relating to the surrounding bones of the artificial bone are maintained stably over a long period of time. Further, cortical bones are formed on the outer layers of the fibers and, therefore, the modification of the osteotissues is maintained over a long period of time even under interative load.</p> |
