Effects of Occlusal and Brushing Cycles on Wear of Composite Resins in Combined Wear Test

Wonglamsam, Amornrat; Kakuta, Kiyoshi; Ogura, Hideo

doi:10.4012/dmj.27.243

Cited by 12 publications

(8 citation statements)

References 10 publications

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“…This method has certain limitations when materials with high abrasion resistance and limited numbers of brushing strokes are investigated. Measurement of depth of wear with a computercontrolled three-dimensional measuring microscope and computing the volume loss from such data is proposed 30) . Due to the high resolution this method is apparently suitable to detect very small wear effects even when only few brushing strokes are used.…”

Section: Discussionmentioning

confidence: 99%

Resistance of nanofill and nanohybrid resin composites to toothbrush abrasion with calcium carbonate slurry

et al. 2009

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The aim of this study was to investigate the wear of four nanofilled resin composites using simulated toothbrushing for 50,000 cycles with calcium carbonate slurry. The depth of abrasion and roughness (Ra) were measured after each 10,000 brushing cycle. The surface texture of the worn samples was examined by SEM.The wear depths of the nanofill Filtek Supreme XT (FIL), the nanohybrides Grandio (GRA), Tetric EvoCeram (TET), and Venus Diamond (VED) increased linearly with numbers of brushing cycles or approximately 80, 12, 600, and 60 µm, respectively after 50,000 strokes. Surface roughness showed virtually no change between 10,000 and 50,000 brushing cycles; the ranking order was TET < FIL < GRA < VED. FIL showed rather uniform abrasion with nanoclusters protruding from the surface. TET was very smoothly abraded without signs of debonding of the prepolymerized particles, whereas GRA and VED showed pronounced wear of the matrix polymer surrounding larger glass filler particles.

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Section: Discussionmentioning

confidence: 99%

Resistance of nanofill and nanohybrid resin composites to toothbrush abrasion with calcium carbonate slurry

et al. 2009

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“…Details of the combined wear test were given in previous reports [4][5][6] . A combined wear test, which simulated occlusal wear and brushing wear alternately, was carried out on the surfaces of the composite resin specimens.…”

Section: Combined Wear Testmentioning

confidence: 99%

“…Specimen preparation details were given in previous reports [4][5][6] . Briefly, each wear specimen was prepared using a metal mold (diameter: 15 mm, depth: 8 mm).…”

Section: Specimen Preparationmentioning

confidence: 99%

“…Numerous studies have since been carried out to investigate the wear of composite resins [1][2][3] , and most of them showed that wear is inevitable. In our recent study 4) on wear of composite resins which contained large organic composite filler particles with nano-sized inorganic particles, they displayed markedly lower wear than other types of composite resins. In other words, apart from the hardness of materials, the wear of composite resins is also caused by other factors.…”

Section: Introductionmentioning

confidence: 99%

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Surface textures of composite resins after combined wear test simulating both occlusal wear and brushing wear

Kakuta¹,

Wonglamsam²,

Goto³

et al. 2012

Dent. Mater. J.

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The purpose of this study was to investigate the relation between the texture of worn surfaces of composite resins and the maximum wear depth. Three types of composite resins were investigated: a hybrid composite resin consisting of irregular-shaped inorganic filler particles (APX); a composite resin which contained small, irregular-shaped, inorganic filler particles and large organic composite filler particles (SRE); and another which contained spherical inorganic filler particles and large organic composite filler (SDX). Surface profile measurement and elemental analysis were carried out on the worn surfaces of these three composite resins using an electron probe microanalyzer (EPMA). For the composite resin which exhibited the largest maximum wear depth, its surface texture was slightly rough with fine pores and grooves. For the composite resin with lowest maximum wear depth, it had a smooth worn surface due to the large organic composite filler being abraded during the combined wear test.

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“…More common is graphical determination of the maximum depth of wear from profilometer traces. 8 New sophisticated measuring methods, such as 3D-CCD microscopy 28 and confocal laser microscopy 20 have a potential to record even minor amounts of wear already after comparatively few brushing cycles. The sensitivity of the profilometer method used in this trial is however, high enough for sufficient discrimination among testing stages and materials.…”

Section: Toothbrush Abrasion Of Resin Composites With Different Fillementioning

confidence: 99%

Toothbrush Abrasion of Resin Composites with Different Filler Concepts

Kyoizumi¹,

Kanehira²,

Finger³

et al. 2012

World Journal of Dentistry

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Purpose: To investigate the effect of tooth brushing wear with and without calcium carbonate slurry on four commercial resin composites based on different filler concepts. Materials and methods:One nanofiller composite MI FIL (MFI, GC), one conventional hybrid type Venus (VEN) and two nanohybrid composites Venus Diamond (VED) and Venus Pearl (VEP) all from Heraeus Kulzer were examined. Forty beam-shaped specimens (12 × 3 × 3 mm) from each product were prepared and subdivided in two equal groups for pregrinding on SiC paper #600 and #4000 respectively. Ten specimens of each pre-ground group were subjected to toothbrush abrasion with calcium carbonate slurry, and 10 to toothbrushing with water only. The samples were submitted to five subsequent runs of 10,000 brushing strokes. Depth of wear and surface roughness (Ra) were measured with a profilometer after each 10 k strokes. Specimens after 50 k strokes were assessed by SEM. Additionally, the KHN (0.25 N/15 s) and the degree of conversion (DC) were determined. Data analysis was done by linear regression and ANOVA followed by Tukey's post-hoc test (p < 0.05). Results: Toothbrushing with abrasive slurry produced significantly different wear depths: VEN > MIF > VEP > VED.Linear relationships between depth of wear and number of cycles (r 2 > 0.94) were established for each material. Pregrinding with SiC #4000 resulted in less wear than pregrinding with #600. Ra figures were much higher for VED than for the other materials tested. MIF and VEN were uniformly abraded, whereas the largest glass fillers in VED protruded from the surroundings and the prepolymer particles in VEP were deeper abraded than the bulk of the material. Toothbrushing with water only revealed not measurable wear. Roughness Ra was practically unchanged when compared with the preground samples before challenging with toothbrushes. Ranking by KHN was: MIF < VEN, VEP < VED, by DC: MIF < VEN < VEP < VED. Conclusion:Filler concepts and monomer compositions affect wear and roughness of resin composites when tooth brushed with abrasive slurry. Toothbrushing without abrasive medium produced neither wear nor roughness. Careful polishing of resin composite restorations is an important determinant of wear and surface roughness.

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Effects of Occlusal and Brushing Cycles on Wear of Composite Resins in Combined Wear Test

Cited by 12 publications

References 10 publications

Resistance of nanofill and nanohybrid resin composites to toothbrush abrasion with calcium carbonate slurry

Resistance of nanofill and nanohybrid resin composites to toothbrush abrasion with calcium carbonate slurry

Surface textures of composite resins after combined wear test simulating both occlusal wear and brushing wear

Toothbrush Abrasion of Resin Composites with Different Filler Concepts

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