Allyson H Harrison

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Recently, the authors realized that an evaluation of the literature on mastication had never been undertaken, and it is hoped that this review presented in three parts, will be of value, not only to the dental clinician, but to other scientists working in associated fields. The first paper discusses the form of the masticatory cycle in the natural and(More)
Abrasive wear tests were performed on unglazed, glazed, and polished porcelain stud specimens using human enamel as the opposing plate specimens. The wear tests were carried out on a wear machine that was specifically designed to simulate the masticatory cycle. The amount of enamel wear produced by both glazed and unglazed porcelain was similar; however,(More)
A review and evaluation of the literature on mastication has been undertaken. Part I discusses the form of the masticatory cycle in the natural and artificial dentitions, including the controversial question of whether tooth contact occurs during function. Part II reviews the literature concerning the speed of movement of the mandible, rate of chewing, and(More)
The aim of this study was to compare some of the physical properties of a heat-cured, a self-cured and a visible light-cured acrylic resin, and to evaluate the suitability of visible light-cured resin as a repair material for dentures made of heat-cured acrylic resin. Transverse strength, surface hardness and impact strength were determined for the three(More)
The fracture of dentures is an unresolved problem. Despite increasing costs incurred by the nation on the repair of these prostheses, very little has been documented on the type of fracture encountered. This survey was carried out to determine the prevalence of type of fracture by the distribution of questionnaires to three different laboratories. Results(More)
Proponents of injection molding systems have claimed a number of benefits over conventional press-pack dough molding systems. The aim of this study was to evaluate a recently developed injection (dry heat) procedure of processing compared with press-pack dough molding utilizing three curing cycles. The dimensional accuracy and stability of acrylic resin(More)
Although soft lining materials are widely used in prosthetic dentistry, their properties are far from ideal. This paper presents a review of these materials, including their historical development, clinical indications, ideal properties, and limitations. Examples of the three basic types are given together with their typical compositions. It is evident that(More)
STATEMENT OF PROBLEM Adequate plaque control is essential for the maintenance of a healthy oral mucosa. Denture cleansers are a popular method used by denture wearers for cleaning. The clinical effectiveness of a new cleanser in tablet form has not been tested in vivo. Methods used for the in vivo assessment of denture cleanser effectiveness are often not(More)