Improvements in and relating to semi-implants

摘要

The invention relates to a transcutaneous or transgingival implant having a body 1 made of a bioinert material, whose subcutaneous or subgingival part 2 is anchored in bone tissue, and, in the region of the passage of the body 1 through the skin or mucosa 4, a ring 5 having at least a surface layer, which is contacted by the skin or mucosa, of a bioactive material. Bioinert materials such as titanium or dense, high-purity Al2O3-ceramic material permit good integration of the implant body with bone. The mechanical properties of these bioinert materials also permit their use for load-transmitting functions. Bioactive materials, such as hydroxyapatite ceramics or tricalcium phosphate ceramics, permit a more favourable deposition of tissue at the passage through the skin but their mechanical strength is too low. By providing the ring 5 of bioactive material on a semi-implant of bioinert material in the region of the passage of the implant through the skin or mucosa it is possible to utilise the more favourable tissue compatibility even for load-transmitting transcutaneous or transgingival implants.