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At least 73 records · Page 4Linked to original sources
PubMed1993

The evolution of the complete denture base. Theories of complete denture retention--a review. Part 3.

The history of denture base materials and the accompanying development of impression techniques are traced from the earliest times to the present day (Part 1) as a prelude to a study (Part 2-4) of the various theories that have been advanced to explain retention of the base without mechanical support. These theories are critically reviewed and tabulated in chronological order. Some areas for further investigation are identified.

Adhesiveness↗
PubMed1992

A modified Kapur scale for evaluating denture retention and stability: methodology study.

This study described a modification of a standard method for evaluating the retention and stability of complete denture prostheses. The upper ranges of the Kapur Scale for retention and stability were expanded to improve the sensitivity of this procedure. The standard and modified Kapur scales were also compared with a model using two denture adhesives that have demonstrated varying efficacies when evaluated by more refined laboratory instrumentation. This study verified that the modified Kapur scale was more capable of discriminating the effectiveness between the two denture adhesives, confirming the elevated sensitivity of the modified scale. This improvement of the Kapur scale could be valuable in conducting clinical efficacy trials of denture adhesives when more advanced methodologies present logistic problems.

Adhesives↗
PubMed1992

Value of guide planes in partial denture retention.

The retention of five nominally identical partial denture casting fitted to a master model was measured on an Instron testing machine in the direction of the guide planes and also at angles inclined to them. It was found that: the maximum retention was considerably reduced when the clasps were removed; the guide planes offered some frictional resistance to displacement, the magnitude being critically dependent on the fit; for frameworks with or without clasps a significant increase (P less than 0.01) in retention occurred when the pull was at 22 degrees but not at 12 degrees to the guide planes, and that there was no statistically significant difference between the retention in the forward and backward directions for either a 12 degrees or a 22 degrees tilt of the dislodging force.

Chromium Alloys↗
PubMed2004

Application of Heatless Glass as a coating material for denture base-evaluation of denture retentive force.

Heatless Glass (HG) was applied to the basal surface of dentures as a coating material. To evaluate the influence of this material on the retentive force of the dentures, the adhesive force of pairs of resin specimens (heat curing resin), metal specimens (Co-Cr alloy), and HG metal specimens (Co-Cr alloy coated with HG), using tap water or resting saliva as a medium was measured, and the following results were obtained. (i) The adhesive force of metal specimens coated with HG material was significantly larger (by 2.3-2.6 times) than that of resin materials (P < 0.001), and it was slightly lower (0.8-0.9 times) than that of metal specimens, showing no significant difference (P > 0.10). (ii) The adhesive force of specimens using tap water as a medium was approximately one-half to two-third of that of specimens using resting saliva as a medium. (iii) When resting saliva was used as the medium, the maximum difference in the adhesive force of the specimens among subjects was 1.7 times. (iv) These findings suggested that, from the perspective of adhesive force, HG coating material is suitable for application to the basal surface of dentures.

Adhesives↗