Results 221 to 230 of about 31,435 (261)
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In vitro contact wear of dental composites
Dental Materials, 2004The aim of this study is to determine the in vitro two-body contact wear mechanisms of three medium filled composites and compare these with a highly filled composite previously investigated.Three commercial dental composites with filler mass fraction loading of 75-76% were evaluated.
Venkata S, Nagarajan +2 more
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Wear of low-fusing dental porcelains
The Journal of Prosthetic Dentistry, 1999The resistance of wear of dental porcelains is of concern when selecting a material for metal-ceramic and all-ceramic restorations.An in vitro investigation was performed to rank a number of dental porcelains with respect to their wear-resistance properties. Material and methods.
P, Derand, P, Vereby
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The wear of dental porcelain in an artificial mouth
Dental Materials, 1986Abstract Simulated occlusal wear studies in an artificial mouth involving enamel occluding on porcelain demonstrated a high coefficient of wear for dental porcelain; in agreement with other workers, an abrasive wear process is postulated. Volume loss due to wear showed good linearity as a function of the number of masticatory cycles with slight ...
R, DeLong +3 more
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Influence of Chemicals on Wear of Dental Composites
Journal of Dental Research, 1982The wear resistance of a commercial dental restorative composite exposed to different chemicals was measured with a pin-disc apparatus. The initial wear rate increased dramatically once the composite had been immersed in chemicals known to soften the cross-linked matrix material, which is a copolymer derived from BIS-GMA and diluent monomer.
W, Wu, J E, McKinney
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On the wear mechanism of human dental enamel
Journal of the Mechanical Behavior of Biomedical Materials, 2010The mechanisms and controlling factors in human enamel wear are not fully understood yet. To address this problem, we have used focused ion beam (FIB) milling and field emission scanning electron microscopy (FESEM) to investigate the processes taking place below the wear surface of enamel specimens from in vitro wear tests.
J A, Arsecularatne, M, Hoffman
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Comparative wear ranking of dental restoratives with the BIOMAT wear simulator
Journal of Oral Rehabilitation, 1999Fundamental in vitro wear tests are important for the study of wear mechanisms, provision of data during material development and screening of materials prior to clinical trials. The aim of this project was to compare the wear of six dental restoratives using the BIOMAT wear simulator which was developed to simulate jaw movements and stresses generated
A U, Yap +3 more
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Wear of Dental Restorative Resins
1981The wear of dental composite restorative materials observed clinically in anterior and posterior teeth may be caused by abrasion, sliding, chemical erosion, or some combination of these mechanisms. This paper reviews experimental methodology for the study of wear of dental composite materials in vitro and in vivo.
J. M. Powers, P. L. Fan, R. G. Craig
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Assessment of the progression of tooth wear on dental casts
Journal of Oral Rehabilitation, 2015SummaryMany methods are available for the grading of tooth wear, but their ability to assess the progression of wear over time has not been studied frequently. The aim was to assess whether the occlusal/incisal grading scale of the Tooth Wear Evaluation System (TWES) was sensitive enough for the detection of tooth wear progression from 14 to 23 years ...
Vervoorn-Vis, G.M.G.J. +6 more
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Patterns of dental wear in the Lengua Indians of Paraguay
American Journal of Physical Anthropology, 1985AbstractWear patterns were examined on dental casts of 202 living Lengua Indians from the Chaco area of Paraguay. Consideration was given to the development of the molar helicoidal plane, age‐related changes in occlusal attrition, coalescence of dentine exposures, interproximal attrition, and erupted crown height.
J A, Kieser +2 more
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American Journal of Physical Anthropology, 1979
AbstractAn ordinal dental attrition scoring technique for molar teeth involving a quadrant system is applied to three Amerind skeletal samples. Molar teeth are visually divided into four sections and each section scored on a 1–10 scale. The score for the whole tooth is the sum of the quadrant scores and ranges from 4–40.
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AbstractAn ordinal dental attrition scoring technique for molar teeth involving a quadrant system is applied to three Amerind skeletal samples. Molar teeth are visually divided into four sections and each section scored on a 1–10 scale. The score for the whole tooth is the sum of the quadrant scores and ranges from 4–40.
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