Wearing Behaviors of a Hybrid Composite Resin for Crown and Bridge.

Nishino, Takanobu; Asao, Takeshi; Nagamatsu, Hiroshi; Kojo, Tatsuro; Kakigawa, Hiroshi; Kozono, Yoshio; Uchida, Yasunari

doi:10.4012/dmj.20.216

Cited by 13 publications

(9 citation statements)

References 18 publications

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“…In contrast, it was thought that the matrix resin would show little wear compared with the composites because the surface of the matrix resin is plastically deformed. To support the results of this research, there are many books which report the inverse relationships between hardness and wear resistance [18,22]. Figure 6 shows the relationship between the coef cient of friction and the wear depth.…”

Section: Discussionsupporting

confidence: 62%

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Influence of particle size of fillers on frictional wear of dental composite resins

Tanimoto¹,

Nemoto²

2004

Composite Interfaces

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The in uence of the particle size of llers on the frictional wear properties of dental composite resins has been investigated. Five kinds of silica llers with mean particle sizes of 0.5, 3.3, 4.3, 7.9, and 15.5 ¹m are used in this study. The ller volume is kept constant at 70 wt%. The coef cient of friction between the abrasive and the specimen was determined by a frictional wear device employing a rotating wheel. After the test, the wear depth was measured by a surface pro lometer and the wear surface was observed by FE-SEM.The results demonstrate that the coef cient of friction and the wear depth increase with an increase in the particle size of the ller of composite resins. In addition, a linear correlation between the coef cient of friction and wear depth was found.

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Section: Discussionsupporting

confidence: 62%

“…These include the tooth brushing test [5,17], the two-body sliding [9,10,14] or impact-sliding test [13,18], and the three-body sliding [15] or impact-sliding test [7,8,11,12]. However, the experimental methods used vary with the researcher, and the wear mechanism has not been established.…”

Section: Discussionmentioning

confidence: 99%

Influence of particle size of fillers on frictional wear of dental composite resins

Tanimoto¹,

Nemoto²

2004

Composite Interfaces

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“…To date, many studies [2][3][4][5][6][7][8][9] have attempted to evaluate the wear behavior of restorative materials using several testing methods. However, these methods evaluated only a part of the wear process of restorative materials.…”

Section: Introductionmentioning

confidence: 99%

Effects of Occlusal and Brushing Forces on Wear of Composite Resins

2006

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INTRODUCTIONWear of restorative materials is a very complex phenomenon that is affected by several extrinsic and intrinsic factors. Wear of restorative materials in the oral environment results from direct contact between the tooth and the restoration during mastication, oral parafunctions, toothbrushing with abrasive particles, as well as chemical effects caused by dietary and regurgitated acids 1） . To date, many studies 2-9） have attempted to evaluate the wear behavior of restorative materials using several testing methods. However, these methods evaluated only a part of the wear process of restorative materials. It is absolutely necessary to integrate main wear processes such as abrasion and fatigue for a thorough and holistic evaluation of the wear behavior of restorative dental materials. To this end, a combined wear test system -which carried out two different types of wear test -was developed 10） . In the combined wear test, a simulated occlusal wear test and a toothbrush wear test repeated alternately on the same position of one specimen. This testing system provided a means for clinical simulation and a basic wear model which consisted of different wear mechanisms induced in the oral environment. Occlusal force and brushing force are important factors for characterizing the wear behavior of restorative dental materials, especially when the two different wear processes are combined.The purpose of this study was to investigate the effects of different occlusal forces and brushing forces on the wear of composite resins in the combined wear test as well as in the simulated occlusal wear test and toothbrush wear test. Table 1 shows four commercially available light curing composite resins used in this study. APX （KURARAY, Okayama, Japan）and Z100（3M, MN, USA）were intended for both anterior and posterior restorations, while SRE （GC, Tokyo, Japan） and SDX（Shofu, Kyoto, Japan）were for posterior restorations. Preparation of the wear specimens and wear tests were carried out following the procedure reported in a previous study 11） . Wear specimens were prepared using a metal mold （diameter: 15 mm, depth: 8 mm） . Thickness of the specimens was adjusted to 2 mm using a spacer in the mold. Each composite resin was injected into the mold and pressed with a glass plate（1.4 mm thickness） . The specimen was polymerized using a curing light MATERIALS AND METHODS Specimen preparation and wear testEffects of occlusal and brushing forces on the wear of composite resins were investigated using three different wear tests: simulated occlusal wear test, toothbrush wear test, and combined wear test which carried out toothbrush wear test and occlusal wear test alternately. Test specimens were prepared from four commercial composite resins. Worn volume and maximum worn depth were measured under different occlusal forces（40 N and 80 N）and brushing forces（1.5 N and 3 N） in the three wear tests. Worn surfaces were observed using a SEM.In all the three wear tests, both higher occlusal and brushing forces resulted in significantly ...

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“…Newer composite formulations have presented improved wear behavior. Laboratory studies found acceptable wear for full-coverage posterior composite restorations 12,13) . However, a clinical study detected that wear of composite crowns was four times greater than that of metalceramic crowns 14) .…”

Section: Introductionmentioning

confidence: 99%

Wear of metal-free resin composite crowns after three years in service

et al. 2013

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To compare differences between the wear behavior of two types of metal-free resin composite crown with a control after three years in clinical service. Sixty-six participants needing one to three posterior single crowns were fitted with 120 crowns. Abutment teeth were randomly assigned to three groups: 40 resin composite crowns with fiber-reinforced framework, 40 resin composite crowns without fiber-reinforced framework, and 40 metal-ceramic crowns. To assess wear, gypsum replicas of the crowns were fabricated and scanned with a 3D laser scanner at baseline and after three years. Differences between the groups were analyzed by use of mixedeffects regression models. Wear of resin composite crowns with fiber-reinforced framework (p=0.0043) and resin composite crowns without framework (p=0.0246) was significantly greater than in the metal-ceramic group. Wear of metal-free resin composite crowns after three years was significantly greater than that of metal-ceramic crowns, but the wear was still clinically acceptable.

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Wearing Behaviors of a Hybrid Composite Resin for Crown and Bridge.

Cited by 13 publications

References 18 publications

Influence of particle size of fillers on frictional wear of dental composite resins

Influence of particle size of fillers on frictional wear of dental composite resins

Effects of Occlusal and Brushing Forces on Wear of Composite Resins

Wear of metal-free resin composite crowns after three years in service

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