Biomedical subjects
Publications and source records attributed to M J Barsby.
The aim of this study was to investigate poly(isobutyl methacrylate) as a potential denture base material. It was found to have very low water absorption but poor mechanical properties and a low glass transition temperature. The latter features render the material itself unsuitable for use as a denture base material, but indicated that isobutyl methacrylate may be a useful co-monomer for reducing water absorption.
Criteria for objective assessment of cobalt-chromium castings have been developed. A random sample of 21 commercial dental laboratories specialising in the production of cobalt-chromium castings was selected. Identical casts and instructions for the construction of a lower partial denture framework were sent to each of them. The resultant castings were assessed according to specific criteria relating to detailed design features. Only one laboratory produced a casting which conformed completely with the design instructions. Significant defects were found in a high proportion of castings. The range of charges was from 28 pounds to 85 pounds. The results of the qualitative assessments suggest only a very weak relationship between laboratory charges and the quality of cobalt-chromium castings. Suggestions are made for minimum standards that may be applied in clinical practice.
Self-inflicted tooth modification other than ritual mutilation practised in some countries is a rare occurrence. The author reports a case of aggravated loss of tooth structure where a patient has contributed to loss of tooth structure by the novel method of adjusting his natural teeth with a 'knife'. Subsequent management of the case is discussed.
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A Denture Base Resin is marketed with hydrophilic characteristics which, it is claimed, improve retention. The claim has been questioned, but this article is concerned with the physico-chemical properties of the product.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.