Accession Number:

ADA188265

Title:

Management of Hard Tissue Avulsive Wounds and Management of Orofacial Fractures.

Descriptive Note:

Annual rept. 1 Jun 84-30 Apr 85,

Corporate Author:

BATTELLE COLUMBUS DIV OH

Personal Author(s):

• Hassler, Craig R.

Report Date:

1985-04-30

Pagination or Media Count:

16.0

Abstract:

The previous annual report dated May 31, 1984 on DAMD17-82-C-2168 indicated that two major difficulties has been encountered in trying to reproduce the required laminated tricalcium phosphate samples. This was especially frustrating since the previous materials had been successfully reproduced. One problem was the source calcium carbonate which is used as a starting product. The material originally used no longer available. Several sources were evaluated until a satisfactory source was found. Extensive experimentation indicated that the method manufacture of calcium carbonate drastically affected the ability to produce a high yield of tricalcium phosphate. The exact chemical nature of calcium carbonate differences was not ascertained due to project time and cost constraints. However, a commercial material was found which produced excellent results and allowed for nearly 100 percent yield of tricalcium phosphate. A second problem identified was difficulty in properly sintering extruded layers together. This problem had previously been encountered and successfully overcome but was not reoccurring . Early in this project year, successful unidirectional tricalcium phosphate material was once again produced. Materials were supplied to the U.S. Army Institute of Dental Research USAIDR for surgical implant into experimental rabbit calvaria. These tests are presently underway at USAIDR. Keywords Prosthetic materials.

Descriptors:

• *BONE FRACTURES
• *ALVEOLAR BONE
• *DENTAL PROSTHESES
• SURGICAL IMPLANTATION
• CERAMIC MATERIALS
• STRENGTH(MECHANICS)
• WOUNDS AND INJURIES

Subject Categories:

• Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE