Showing papers on "Occlusal scheme published in 1996"

An in vitro study of the influence of occlusal scheme on the pressure distribution of complete denture supporting tissues

Abstract: This study compared lingualized occlusion and completely balanced occlusion using a simulation device. Sixteen pressure transducers were placed in the simulated residual ridge area supporting the test dentures. Lingualized occlusion was found to transfer stresses from the occluding side to the opposite, nonworking side to stabilize the mandibular denture.

Biostereometric quantification of clinical denture tooth wear.

Abstract: In this study the wear of mandibular acrylic resin teeth opposed by porcelain maxillary teeth arranged in a lingualized occlusal scheme over a period of 3 years was measured. Six edentulous subjects received complete dentures as above and with three baseline markers of amalgam. At yearly intervals casts were made of the mandibular occlusal surfaces, including markers, and plotted by stereophotogrammetry. Volumetric loss of material was quantifiable. Ranges of 0.62-3.33 mm3/mm2 on the left side and 0.71-1.64 mm3/mm2 on the right were recorded. Friedman two-way ANOVA test indicated significant wear on teeth 35, 36, 45 and 46 but not on 34 and 44. A one-sided chewer displayed greater wear on the contralateral side, a finding difficult to explain.

The influence of occlusal scheme on masticatory forces using implant stabilized bridges.

Abstract: The objectives of this study were to determine the effects on masticatory forces of using implant stabilized mandibular bridges with occlusal schemes providing either balanced or unbalanced articulation. The investigation was carried out in a group of six subjects who had dentate, or restored dentate maxillary arches and who used implantstabilized mandibular prostheses. Peak masticatory forces, chewing frequency and load rate were determined when chewing bread, carrots and nuts. The mean peak masticatory force varied markedly from subject to subject, and, together with the masticatory load rate were lowest when eating bread and highest when chewing nuts, with values for chewing carrots between the two. There was no detectable difference in mean peak masticatory force or load rates associated with chewing bread with the two occlusal schemes; however, these were lower with balanced occlusion when chewing nuts and carrots. The ranking of subjects in terms of mean peak masticatory force and load rate was consistent and peak load rates of up to 2000 N/sec were recorded. Chewing frequency was relatively consistent for a particular subject irrespective of the foodstuff.