An Investigation of Bonding Mechanisms at the Interface of a Prosthetic Material.
Abstract
The surface chemical behavior of bioglass containing soda-calcia-silica and variable percentages of phosphorous has been investigated. Surface ion concentration profiles determined with Auger spectroscopy and ion beam milling detail the structural alterations produced by aqueous attack and in-vivo exposure. A mechanism is postulated which explains the sequence of events leading to the formation of the multiple-layer corrosion structures in-vivo. Stable interfacial fixation results when bioglasses are implanted in bone. Based upon the in-vivo observations, a theory is proposed that an ideal implant material must have a dynamic surface chemistry that induces histological changes at the implant surface which would normally occur if the implant were not present. Progress in the development of a mechanically suitable resorbable bone plate for bioglass-ceramics is rviewed. A long series of in-vitro and in-vivo fabrication and design experiments have been conducted to produce plates which will not fracture during implantation. Several successful implantations have resulted. However, in-vivo response to the bioglass-alumina composite material is not favorable. A successful resorbable bone plate does not seem possible by this procedure.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1975
- Accession Number
- ADA020328
Entities
People
- George Piotrowski
- Homer A. Paschall
- Larry L. Hench
- William C. Allen
Organizations
- University of Florida