| 摘要 |
The implant consists of a shank (1) which is generally cylindrical in shape and closed at least one end, fitted permanently into a blind and generally cylindrical bone cavity with a rounded end, and a superstructure which is made in one piece with or attached to the shank.The shank is made from at least three layers an outer layer (3) of a material which will integrate with the bone, an inner layer (1) of a metal or composite material, and an intermediate layer (2) which is continuous or discontinuous and made from an elastically-deformable material, designed to provide the superstructure with the resilience of a natural organ while absorbing shocks and distributing stresses. The inner and outer layers are connected at the upper end of the shank to form a closed space filled at least partly with the intermediate layer of a viscoelastic material. |
