Effects of abrasive and fiber components in medium on wear of composite resins

Kakuta, Kiyoshi; Ogura, Hideo

doi:10.4012/dmj.27.716

Cited by 4 publications

(2 citation statements)

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“…Condon and Ferracane introduced poppy seed as a replacement to millet seed in de Gee's original mixture [7,8]. Since that time, additional third body particles have been examined including hydroxyapetite, green carborundum [9] and calcium diphosphate [10]. Glass microbeads have also been used as a third-body medium in industry protocol to expedite wear testing.…”

Section: Introductionmentioning

confidence: 99%

Characterization of third-body media particles and their effect on in vitro composite wear

et al. 2012

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Objectives The purpose of this study was to compare four medium particles currently used for in vitro composite wear testing (glass and PMMA beads and millet and poppy seeds). Methods Particles were prepared as described in previous wear studies. Hardness of medium particles was measured with a nano-indentor, particle size was measured with a particle size analyzer, and the particle form was determined with light microscopy and image analysis software. Composite wear was measured using each type of medium and water in the Alabama wear testing device. Four dental composites were compared: a hybrid (Z100), flowable microhybrid (Estelite Flow Quick), micromatrix (Esthet-X), and nano-filled (Filtek Supreme Plus). The test ran for 100,000 cycles at 1.2Hz with 70N force by a steel antagonist. Volumetric wear was measured by non-contact profilometry. A two-way analysis of variance (ANOVA) and Tukey's test was used to compare both materials and media. Results Hardness values (GPa) of the particles are (glass, millet, PMMA, poppy respectively): 1.310(0.150), 0.279(.170), 0.279(0.095), and 0.226(0.146). Average particle sizes (μm) are (glass, millet, PMMA, poppy respectively): 88.35(8.24), 8.07(4.05), 28.95(8.74), and 14.08(7.20). Glass and PMMA beads were considerably more round than the seeds. During composite wear testing, glass was the only medium that produced more wear than the use of water alone. The rank ordering of the materials varied with each medium, however, the glass and PMMA bead medium allowed better discrimination between materials. Significance PMMA beads are a practical and relevant choice for composite wear testing because they demonstrate similar physical properties as seeds but reduce the variability of wear measurements.

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Section: Introductionmentioning

confidence: 99%

Characterization of third-body media particles and their effect on in vitro composite wear

et al. 2012

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“…Condon and Ferracane [19] then introduced poppy seeds as a substitute for the millet seed originally suggested by De Gee. Since then different abrasive particles have been examined, including hydroxylapatite, silicon carbide [20] and calcium phosphate [21]. Glass microspheres have also been used as abrasive body in order to accelerate wear testing [22].…”

Section: Introductionmentioning

confidence: 99%

Influence of abrasive solutions on direct restorative composites wear

Antunes

Ramalho

2018

J Braz. Soc. Mech. Sci. Eng.

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Tribological characterization of dental restorative materials is very hard because it is difficult to reproduce the actual test conditions which occur in the mouth. Despite the wide variety of wear test equipment, there are no wear test standards. The guide provided by the International Organization for Standardization (ISO), entitled '' Dental materials-guidance on testing of wear-part 2: Wear by two-and/or three body contact, Technical Specification 14569-2 number 2001 focuses only on a technical description of the procedures. This standard doesn't evaluate or demonstrate any of the advantages or disadvantages of the existing tests or their procedures. This work is focused on the evaluation of the effect of abrasion solution. Three abrasive of the most common used were select. Test condition such as load and number of cycles were established, in order to attain specific wear rates similar to the ones in the mouth. From a soft organic abrasive to more severe abrasive several solutions were tested. Wear analyses was done using two distinct approaches; a classical and an energetic. A glass sphere against a flat direct restorative composite surface on a reciprocating sliding contact were selected for the evaluation, initial conditions were set based on previous studies which provided decisive information for the selection of adequate laboratorial parameters. It was found that the wear evolution of the composite and antagonist materials depends directly on the abrasive solution and test conditions used. It was necessary to fix a standard parameter to compare abrasive solutions, wear rate (mm3/cycle) of natural teeth. The use of each abrasive solution can be made depending on the purpose of the study, i.e., if it is comparative performance of a particular material or if you want to simulate more closely what goes into the mouth. If the purpose of the study is to compare performance of particular materials (more severe abrasive solution) or if we want to simulate more closely what happens in the mouth (mild abrasive solution). A morphological and wear mechanisms analysis were done using SEM, this allowed to compare qualitatively the effect of abrasive solution on the material pair.

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