Surgical Tooth Implants, Combat and Field.
Rept. no. 10 (Annual) 30 Nov 78-15 Dec 79,
BATTELLE COLUMBUS LABS OH
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Long term implant studies of alumina tooth roots are being performed in both humans and baboons. The implants designed for this project are single root elliptical and rectangular designs with serrations arranged for maximal stress distribution of occlusal loads. The implant is of a three-piece design. The serrated root portion is alumina ceramic. The upper two parts of the implant post and core and crown are conventional dental materials, usually gold. Roots are produced by grinding bisque fired alumina stock on a computer controlled milling machine. This technique provides high quality, high strength, and design flexibility. A series of nineteen graded sizes of implants have been produced. In the last year design modifications and improved fabrication techniques have allowed the production of roots small as 4 mm x 4 mm in cross section. Extensive quality assurance has been performed on the implants intended for human implant. Quality assurance procedures include wet densities, visual inspection and mechanical testing of test bars. The quality of alumina root has consistently improved throughout this project. Long term implants are being followed in the baboon colony. Success continues to be at the same level as reported in the previous year.
- Medicine and Medical Research