Development and Evaluation of Artificial Dental Anchors of Non-Natural Design Implanted in Miniature Swine.

摘要

Four porous materials,two ceramic and two forms of titanium alloy,have been fabricated into dental anchors and pins and implanted into the mandibles of miniature swine. The metal anchors,all Ti-6Al-4V alloy,have been fabricated from both Battelle-developed Void Metal Composite and gravity-sintered spherical particles. The ceramic materials,alumina porcelain and magnesium aluminate spinel,were formed into anchors of varying porosity by special slip casting and firing techniques. Two basic anchor designs,oblong and cylindrical,have been used in these studies. Oblong anchors and early dental pins suffered a high in vivo failure rate,due to post-operative infection and rejection,resulting from design,implant fit,and operative technique. Newer cylindrical anchors and test pins are demonstrating encouraging results,with complete acceptance by the surrounding soft tissues and bony ingrowth into the porous prostheses.