An Investigation of Bonding Mechanisms at the Interface of a Prosthetic Material.
Report no. 5 (Annual) 1 Sep 73-31 Aug 74,
FLORIDA UNIV GAINESVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING
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The influence of phosphorus, boron and fluorine additions on the surface chemical reactivity of a soda-lime-silica glass has been investigated. Several techniques, including infrared reflection spectroscopy, ion solution analysis, scanning electron microscopy, energy dispersive x-ray analysis, x-ray diffraction, Auger electron spectroscopy and ion beam milling, have been employed to develop insight into the morphological and chemical changes which occur on glass surfaces corroded in a simulated physiologic environment. The resulting corrosion layers and the influence of phosphorus, boron and fluorine on their compositions and rates of formation are defined. Surface ion concentration profiles determined with Auger spectroscopy and ion beam milling detail the structural alterations produced by aqueous attack. A mechanism is postulated which explains the sequence of events leading to the formation of the multiple-layer corrosion structures. Having defined the surface chemical behavior of the glasses in an invitro environment, an effort is made to relate these observations to the response elicited when identical glasses are implanted in laboratory animals. Stable interfacial fixation results when specific surface chemistry conditions are satisfied. Insufficient of excess surface ion concentrations produce negative osteogenesis and fixation results.
- Medicine and Medical Research
- Ceramics, Refractories and Glass
- Atomic and Molecular Physics and Spectroscopy