Friction and wear behavior of dental feldspathic porcelain

Yu, Haiyang; Cai, Zhen Bing; Ren, Pingdi; Zhu, Minghao; Zhou, Zhongrong

doi:10.1016/j.wear.2006.01.024

Cited by 44 publications

(27 citation statements)

References 26 publications

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“…These conditions might have produced a high coefficient of friction between the surfaces, thus the wear resistance of porcelain was decreased 38) . Subsurface cracks have been found when using high sliding cycles 39) . Furthermore, brittle cracks and delamination are often observed in feldsphatic porcelain, especially under non-lubricated friction.…”

Section: Discussionmentioning

confidence: 99%

In vitro wear resistance, hardness and elastic modulus of artificial denture teet

et al. 2011

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In this study, the wear resistance, hardness, elastic modulus, and the correlations between them of artificial denture teeth at the sub-enamel layer were examined. Four types of tested artificial denture teeth consisted of 3 conventional acrylic resin teeth (Cosmo HXL, Major Dent, and Yamahachi FX), 1 high cross-linked acrylic resin teeth (Trubyte Bioform IPN), 2 composite resin teeth (SR Orthosit PE, and Yamahachi PX), and 1 porcelain teeth (ACE Teeth). The two-body wear test was performed using a custom made pin on disc apparatus. Volume and weight loss were measured. Hardness and elastic modulus were also assessed by using a nanoindentation system. The results suggested wear resistance varied among the denture tooth materials. Wear resistance of high cross-linked acrylic resin teeth was the lowest. A definite relation between wear resistance and mechanical properties of materials could not be found in this study.

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Section: Discussionmentioning

confidence: 99%

In vitro wear resistance, hardness and elastic modulus of artificial denture teet

et al. 2011

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“…A range of techniques have been used to examine the lubricating properties of saliva and its components, including atomic force microscopy (AFM) [41][42][43] and simple tribometers [21,23,[44][45][46][47][48][49]. These studies primarily focus on the influence of saliva, the acquired pellicle (a proteinacious layer on the enamel surface) and saliva substitutes on the tribological properties of enamel/teeth surfaces and orthodontic materials.…”

Section: Introductionmentioning

confidence: 99%

The Lubricating Properties of Human Whole Saliva

2007

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We demonstrate the efficient boundary lubricating properties of human whole saliva (HWS) in a soft hydrophobic rubbing contact, consisting of a poly(dimethylsiloxane) (PDMS) ball and a PDMS disk. The influence of applied load, entrainment speed and surface roughness was investigated for mechanically stimulated HWS. Lubrication by HWS results in a boundary friction coefficient of l % 0.02, two orders of magnitude lower than that obtained for water. Dried saliva on the other hand results in l % 2-3, illustrating the importance of hydration for efficient salivary lubrication. Increasing the surface roughness increases the friction coefficient for HWS, while it decreases that for water. The boundary lubricating properties of HWS are less sensitive to saliva treatment than are its bulk viscoelastic properties. Centrifugation and ageing of HWS almost completely removes the shear thinning and elastic nature observed for fresh HWS. In contrast, the boundary friction coefficients are hardly affected, which indicates that the high-M w (supra-)molecular structures in saliva, which are expected to be responsible for its rheology, are not responsible for its boundary lubricating properties. The saliva-coated PDMS surfaces form an ideal model system for ex-vivo investigations into oral lubrication and how the lubricating properties of saliva are influenced by other components like food, beverages, oral care products and pharmaceuticals.

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“…15,16 In a tribological study of feldspathic porcelain ceramics against silicon nitride in simulated oral conditions, Yu et al illustrated the prominent effect of load than sliding speed and frequency of oscillation. 17 The reduction in friction and wear of cordierite GC was attributed to the formation of thin gellike reaction layers as a result of ion-exchange in hydrochloric acid, while the network dissolution process was responsible for the increased wear and friction in caustic soda solutions. 18 19 In another study of the sliding of glass composites against alumina in distilled water, it was found that the wear dominates by formation and delamination/dissolution of the tribochemical layer/products.…”

Section: Introductionmentioning

confidence: 99%