Journal ArticleDOI
Functional occlusal forces: an investigation by telemetry.
TLDR
There was a remarkable statistically significant day-to-day variation in force values, and the differences between maximum and minimum force values were highest in voluntary, nonfunctional movements.Abstract:
In normal chewing the forces exerted on the occlusal surface seldom exceeded 10 to 15 pounds, as recorded by an eight-channel force transmitter in a removable fixed partial denture. Ninety-five percent of forces were less than 3.5 pounds for subject A, 2.0 pounds for subject B, and 10.0 pounds for subject C. The chewing frequency and the places of maximal force on the occlusal surface were relatively constant. The electromyographic chewing patterns could be considered normal in all circumstances. There was a remarkable statistically significant day-to-day variation in force values. The forces also changed for different kinds of food. The differences between maximum and minimum force values were highest in voluntary, nonfunctional movements.read more
Citations
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Journal ArticleDOI
Clinically relevant approach to failure testing of all-ceramic restorations.
TL;DR: Validated tests are needed to elucidate the role(s) that cement systems, bonding, occlusion, and even metal copings play in the success of fixed prostheses and to make meaningful comparisons possible among novel ceramic and metal substructures.
Journal ArticleDOI
Reduction in tooth stiffness as a result of endodontic and restorative procedures.
TL;DR: Results on 42 teeth indicate that endodontic procedures have only a small effect on the tooth, reducing the relative stiffness by 5%.
Journal ArticleDOI
Development of an Artificial Oral Environment for the Testing of Dental Restoratives: Bi-axial Force and Movement Control
Ralph DeLong,William H. Douglas +1 more
TL;DR: The integration of two closed mechanical loops was used to produce a force-movement cycle, using servo-hydraulics, which represented the first phase in developing an artificial oral environment.
Journal ArticleDOI
A classification of dental composites according to their morphological and mechanical characteristics
TL;DR: It can be concluded that the materials of choice for restoring posterior cavities at present are the Ultrafine Compact-Filled Composites because their intrinsic surface roughness, Young's modulus and, indirectly, their filler content, compressive strength, and surface hardness are comparable to the same properties of enamel and dentin.
References
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Journal ArticleDOI
Extraneuronal binding of catecholamines and 3,4-dihydroxyphenylalanine (dopa) in salivary glands.
TL;DR: It appears that a certain activity of the parenchyma is necessary for the binding of catecholamines and in all probability also L-dopa to be bound extraneuronally in the salivary glands of the rat.
Journal ArticleDOI
Measurement of Stress in Mastication. I
TL;DR: The method for recording masticatory forces described in 19531 was modified so that, assuming the loadbearing area between the teeth during chewing to be approximately the same as the area of contact with the teeth in centric occlusion, the loads on the whole tooth could be determined.
Journal ArticleDOI
Occlusal Relations and Mastication in Australian Aborigines
TL;DR: In this article, the authors present a study of the relationship between Australian Aborigines and Australian Aboriginal people, focusing on occlusal relations and mastication in Australian aborigines.
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Development of an Artificial Oral Environment for the Testing of Dental Restoratives: Bi-axial Force and Movement Control
Ralph DeLong,William H. Douglas +1 more