In situ observations of the real-time wear of PMMA flat against steel ball under torsional fretting

Cai, Zhenbing; Zhu, Minhao; Yang, Shili; Xiao, Xinbiao; Lin, Xiuzhou; Yu, Haiyang

doi:10.1016/j.wear.2011.01.069

Cited by 21 publications

(11 citation statements)

References 19 publications

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“…As microbial adhesion and colonization usually occur on non shedding surfaces (lewinstein et al, 2003), dental prostheses need to have smooth surfaces to minimize the retention of plaque and microorganisms (vallittu, ruyter and Ekstrand, 1998;Cardoso et al, 2008). To decrease the accumulation and colonization of microorganisms, the surface roughness of dental prostheses should not exceed a threshold of 0.2 µm (scotti, Mascellani and Forniti, 1997;Cai et al, 2011;Ayman, 2017). studies reported that a 0.2 µm roughness threshold can be achieved by common laboratory and chairside finishing and polishing procedures.Therefore, adequate finishing and polishing of dental prostheses, including dentures, are mandatory to minimize prosthesis surface roughness (scotti, Mascellani and Forniti, 1997).…”

Section: Introductionmentioning

confidence: 99%

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Comparative Evaluation of Wear Resistance Among Cad-Cam and Resin Interim Restoration - an in Vitro Study

J¹

2020

Biosci. Biotech. Res. Comm

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The most commonly used material in dentistry is Poly methyl methacrylate (PMMA) which has excellent properties like physical and mechanical properties but this material is rarely used in pure form as it has relatively poor wear resistance and heat resistance. The ideal properties of fixed partial denture (FPD) base material should have superior surface texture and mechanical properties. The wear resistance of heat cure provisional and CAD-CAM provisional vary greatly based on their properties. The aim of this study was to comparatively evaluate the wear resistance in heat cure provisional and cad-cam provisional fixed partial denture. Eight samples each of heat cure provisional and CAD-CAM milled FPD are prepared. The samples are then run for 8 hours in a brushing simulator with a toothpaste to check for its wear resistance .The pre test and post test measurement of its wear resistance is done using laser scan. The wear resistance is more for the CAD-CAM provisional FPD as compared to the heat cure provisional FPD. Pre treatment and post treatment cuspal thickness shows a vast difference in heat cure provisional. However the pre treatment and post treatment cuspal thickness reduction is minimal in CAD CAM provisional FPD. CAD CAM provisional FPD showed better wear resistance than heat cured provisional FPD. Hence CAD CAM prosthesis should be preferred over the heat cured FPD.

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Section: Introductionmentioning

confidence: 99%

“…Polymethyl methacrylate (PMMA) is the most commonly used polymer as a removable prosthetic restorative material due to its excellent physical and mechanical properties. Due to its poor wear resistance and heat resistance, it is not used as a permanent fixed restorative material (Demir et al, 2006;Cai et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of Wear Resistance Among Cad-Cam and Resin Interim Restoration - an in Vitro Study

J¹

2020

Biosci. Biotech. Res. Comm

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“…However, pure PMMA is rarely used as the tribological material due to its relatively poor wear resistance and heat resistance. [1][2][3] In Polymer Tribology, wear mechanisms include abrasive wear, adhesive wear and fatigue wear. 4,5 Abrasive wear is a material-loss phenomenon due to the extrusion and movement of hard particles on the friction surface.…”

Section: Introductionmentioning

confidence: 99%

Heat treatment to improve the wear resistance of PTFE/PMMA composites

Zhang

Chen

et al. 2019

RSC Adv.

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“…It has excellent mechanical properties, high elastic modulus, good dimensional stability, acid-alkali resistance and good biological properties. However, the high friction and wear of pure PMMA restrict its use as a friction material in mechanical parts such as bearings, shaft sleeves, seals, and so on [1,2,3]. Modification by filling organic, inorganic, or metallic micro/nano particles into a polymer matrix producing a new hybrid system is an effective way to improve the mechanical and tribological properties of polymers [4,5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Significant Reduction of the Friction and Wear of PMMA Based Composite by Filling with PTFE

Zhang

Chen

et al. 2018

Polymers

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Polytetrafluoroethylene/Poly(methyl methacrylate) (PTFE/PMMA) composite was prepared by mixing PTFE into PMMA matrix which synthesized by the PMMA powder mixture and methyl methacrylate (MMA) liquid mixture. The effects of the filling mass ratio of PTFE and powder/liquid (P/L) ratio on the friction and wear properties of PTFE/PMMA composites against bearing steel were studied by a ball-on-disk tribometer. Fourier transform infrared (FTIR), field emission scanning electron microscopy (FESEM), and energy dispersive X-ray spectroscopy (EDS) were used to characterize the synthesis of PTFE/PMMA composite. The shore hardness and glass transition temperature (Tg) were obtained respectively by shore hardness tester and differential scanning calorimetry (DSC). The results show that the friction coefficient and wear rate of PMMA based composite, comparing with the unfilled PMMA, can be significantly reduced by filling with PTFE. With the increasing of PTFE filling mass ratio, the wear rate of PTFE/PMMA composite increases. The friction coefficient and wear rate of the unfilled PMMA and PTFE/PMMA composite generally decrease with the P/L ratio increasing. The main wear mechanism of the unfilled PMMA is adhesive wear. While the main wear mechanisms of PTFE/PMMA composites are fatigue wear and abrasive wear.

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In situ observations of the real-time wear of PMMA flat against steel ball under torsional fretting

Cited by 21 publications

References 19 publications

Comparative Evaluation of Wear Resistance Among Cad-Cam and Resin Interim Restoration - an in Vitro Study

Comparative Evaluation of Wear Resistance Among Cad-Cam and Resin Interim Restoration - an in Vitro Study

Heat treatment to improve the wear resistance of PTFE/PMMA composites

Significant Reduction of the Friction and Wear of PMMA Based Composite by Filling with PTFE

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