Mechanical property characterization of resin cement after aqueous aging with and without cyclic loading

Walker, Mary P.; Spencer, Paulette; Eick, J. David

doi:10.1016/s0109-5641(03)00008-3

Cited by 32 publications

(30 citation statements)

References 41 publications

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“…These studies usually demonstrated an increase in hardness 5 and surface roughness, 6-10 discoloration, 6,11-13 and decreased mechanical properties such as strength and modulus. [14][15][16] Initially, when a filled polymer like resin cement is exposed to aqueous aging, the uptake of water occurs as a diffusion-controlled process.…”

Section: 18mentioning

confidence: 99%

“…These studies usually demonstrated significant changes in the surface characteristics, physical properties, and color of these resins with aging. [6][7][8][9][10][11][12][13][14][15][16] However, in vivo or in vitro information about the aged lingual retainer adhesives which are supposed to serve for a long time period in the mouth does not exist.…”

Section: Introductionmentioning

confidence: 99%

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Accelerated Aging Effects on Surface Hardness and Roughness of Lingual Retainer Adhesives

Ramoğlu

Üşümez²,

Büyükyılmaz

2008

The Angle Orthodontist

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Objective: To test the null hypothesis that accelerated aging has no effect on the surface microhardness and roughness of two light-cured lingual retainer adhesives. Materials and Methods: Ten samples of light-cured materials, Transbond Lingual Retainer (3M Unitek) and Light Cure Retainer (Reliance) were cured with a halogen light for 40 seconds. Vickers hardness and surface roughness were measured before and after accelerated aging of 300 hours in a weathering tester. Differences between mean values were analyzed for statistical significance using a t-test. The level of statistical significance was set at P Ͻ .05. Results:The mean Vickers hardness of Transbond Lingual Retainer was 62.8 Ϯ 3.5 and 79.6 Ϯ 4.9 before and after aging, respectively. The mean Vickers hardness of Light Cure Retainer was 40.3 Ϯ 2.6 and 58.3 Ϯ 4.3 before and after aging, respectively. Differences in both groups were statistically significant (P Ͻ .001). Following aging, mean surface roughness was changed from 0.039 m to 0.121 m and from 0.021 m to 0.031 m for Transbond Lingual Retainer and Light Cure Retainer, respectively. The roughening of Transbond Lingual Retainer with aging was statistically significant (P Ͻ .05), while the change in the surface roughness of Light Cure Retainer was not (P Ͼ .05). Conclusions: Accelerated aging significantly increased the surface microhardness of both lightcured retainer adhesives tested. It also significantly increased the surface roughness of the Transbond Lingual Retainer.

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Section: 18mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accelerated Aging Effects on Surface Hardness and Roughness of Lingual Retainer Adhesives

Ramoğlu

Üşümez²,

Büyükyılmaz

2008

The Angle Orthodontist

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“…The first group consisted of a pre-activated silane (3-methacryloxypropyltrimethoxysilane; 3-MPS) dissolved in an ethanol/water solvent (Monobond-S, Ivoclar-Vivadent, Schaan, Liechtenstein). [10][11][12][13][14][15][16] The second group consisted of a 2-component silane system that includes a silane, trimethoxysilyl propyl methacrylate (γ γ-MPTS) and hydrophilic adhesive resin monomer 4-methacryolxyethyl trimellitate anhydride (4-META) (Porcelain Liner M, Sun Medical Co Ltd, Moryama, Japan) [17][18] which are segregated into 2 separate bottles (Table 1).…”

Section: Methodsmentioning

confidence: 99%

“…The thermocycling and water storage of bonded specimens have been widely used for in vitro testing of resin-based dental materials to assess the resistance of bonded interfaces to hydrolytic degradation. [14][15] Thus, the objectives of this study were to evaluate, with a model of accelerated water aging, the effects of water storage and thermocycling on the microtensile bond strength of resin composite cores to silanized fiber posts and examine the micromorphologic characteristics of aged interfaces. The null hypothesis tested was that there are no differences in adhesive effectiveness and degradation resistance of 2 different silane coupling agents on fiber post/core build-ups after water storage.…”

Section: Introductionmentioning

confidence: 99%

In Vitro Hydrolytic Degradation of Composite Quartz Fiber-post Bonds Created by Hydrophilic Silane Couplings

Monticelli¹,

Osorio²,

Toledano³

et al. 2006

Operative Dentistry

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©Operative Dentistry, 2006, 31-6, 728-733 F Monticelli • R Osorio M Toledano • FR Tay • M Ferrari Clinical RelevanceSilane-based composite bonds are susceptible to hydrolytic degradation: interfacial water sorption induced by hydrolytic couplings may adversely affect their strength. SUMMARYThe hydrolytic stability of a pre-activated MPS silane (Monobond-S) and a 2-component 4-META/ γ γ-MPTS silane (Porcelain Liner M) to H 2 O 2 -etched quartz fiber posts was investigated using a modeling approach. Composite build-ups around silanized posts were stored dry for 24 hours, stored in deionized water at 37°C for 24 hours, 1 week, 1 month or they were thermocycled. Sectioned specimens were prepared for microtensile bond testing and SEM examination; 4-META/γ γ-MPTS silane produced a rapid decline in bond strength after 1 week and 1 month of water storage and after thermocycling. This was not apparent in pre-activated MPS silane. SEM revealed debonding along the post-composite interfaces, which were coupled with 2-component silane. The use of a hydrophilic resin monomer (4-META) for on-demand hydrolysis of the γ γ-MPTS silane expedited interfacial water sorption and hydrolytic degradation, which may be prevented with alternative coupling strategies.

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“…Os cimentos resinosos modernos apresentam baixa viscosidade, partí culas pequenas que proporcionam maior resistência, grande quanti dade de carga, acarretando menor contração de polimerização e de preferência, devem ser dual, para polimerização das partes mais profundas 3,4 . A escolha de um cimento resinoso é dependente da situação clínica combinada com as propriedades fí sicas, biológicas e de manipulação 4,5 . A resistência à fl exão dos materiais resinosos eleva-se à medida que a qualidade de carga inorgânica em peso aumenta 6 .…”

Section: Bachiega Et Al -Resistência Adesiva De Cimentos Resinosos Eunclassified

Avaliação in vitro da Resistência Adesiva de Quatro Cimentos Resinosos em Dentes Decíduos

Bachiega¹

2010

Pesq Bras Odontoped Clin Integr

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Mechanical property characterization of resin cement after aqueous aging with and without cyclic loading

Cited by 32 publications

References 41 publications

Accelerated Aging Effects on Surface Hardness and Roughness of Lingual Retainer Adhesives

Accelerated Aging Effects on Surface Hardness and Roughness of Lingual Retainer Adhesives

In Vitro Hydrolytic Degradation of Composite Quartz Fiber-post Bonds Created by Hydrophilic Silane Couplings

Avaliação in vitro da Resistência Adesiva de Quatro Cimentos Resinosos em Dentes Decíduos

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