Mechanical and physical properties of contemporary dental luting agents

Attar, Nuray; Tam, Laura E.; McComb, Dorothy

doi:10.1067/mpr.2003.20

Cited by 218 publications

(201 citation statements)

References 29 publications

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“…The location of the margins of a restoration is of great importance, since the removal of cement remnants is very difficult along the subgingivallylocated margins. Some of the glass ionomer cements do not have enough radiopacity to be detected in a radiograph (18). This could lead to a failure to remove the cement overhangs, and, in the future, undetected recurrent caries (5,39).…”

Section: Dental Cementsmentioning

confidence: 99%

“…The moderate radiopacity of ceramic materials facilitates the diagnosis of secondary caries under the restoration and enables observation of the periodontal effects of the overhangs (2,18). Moreover, the radiopacity of these materials aids localization following the accidental swallowing of fixed or removable dental prostheses and interim crowns (7).…”

Section: Ceramics and Metalsmentioning

confidence: 99%

“…Radiopacity is a desirable property of dental materials, including direct-filling restorative materials (1-3, 5, 10-15), cavity liners (11)(12)(13)(14), core build-up materials (12,16), luting agents (3,13,(16)(17)(18)(19)(20), adhesive systems (21), root canal filling materials (10,22), provisional crown and bridge materials (23), and ceramic restorative materials (24,25). The localization of radiolucent dental materials may not be detected if they are aspirated or impacted in the soft tissue because of trauma or iatrogenic reasons (7,26,27).…”

Section: Contextmentioning

confidence: 99%

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Radiopacity of Dental Materials: An Overview

Pekkan¹

2016

Avicenna J Dent Res

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Context: This study aimed to provide an overview of the literature on the radiopacity of dental materials in order to emphasize its importance. Evidence Acquisition: English-language literature was investigated using manual and electronic searches for the terms "radiopacity," "dental material," "cement," "composite," "ceramic," "endodontic root canal sealer," "bone graft," and "acrylic resin" in the databases of Medline, google scholar, and Scopus up to April 2016. Seventy-nine selected publications, including review articles, original articles, and books, were evaluated. Results: The radiopacity of different dental materials may be lower or higher than that of the replaced tissue depending on the restorative material used. The research revealed that highly-radiopaque materials should not be used in dental restorations, except as bone graft and endodontic root canal filling materials. For most of the dental restorative materials, moderate radiopacity within the range of the replaced dental tissue is recommended. However, the lower radiopacity of polymer-based restorative or prosthetic dental materials is still a significant clinical problem. Conclusions:The author recommends using highly-radiopaque materials whenever possible for treatment of bone defects and root canals. For dental materials that replace clinical crowns, the radiopacity should be within the range of that of the replaced tooth structure (dentin or enamel). The radiopacity of dental cements should be much higher than that of the enamel in order to facilitate detection of the thin cement remnants.

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Section: Dental Cementsmentioning

confidence: 99%

Section: Ceramics and Metalsmentioning

confidence: 99%

Section: Contextmentioning

confidence: 99%

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Radiopacity of Dental Materials: An Overview

Pekkan¹

2016

Avicenna J Dent Res

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“…A growing number of luting materials categorized as acrylic resins as well as resin-modified glass ionomers have recently been introduced because of their improved bonding characteristics. However, only limited information is available about the radiographic properties of currently available luting materials (10)(11)(12). In this study we determined the radiopacity values of various luting materials, and compared them with those of enamel and dentin, in order to improve the diagnostic accuracy of dental radiographs taken together with existing luting materials.…”

Section: Originalmentioning

confidence: 99%

Radiopacity of conventional, resin-modified glass ionomer, and resin-based luting materials

Tsuge

2009

J Oral Sci

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Abstract:The purpose of the present study was to evaluate the radiopacity of currently available dental luting materials. Five conventional cements, six resinmodified glass ionomers (RMGIs), two methyl methacrylate (MMA)-based acrylic resins (eight shades), and nine composite luting materials were evaluated. Radiographs of the specimens were taken together with tooth slices and aluminum step wedges. The density of the specimens was determined with a densitometer and was expressed in terms of the equivalent thickness of aluminum per 2.0-mm unit thickness of specimen. The radiopacity values for human enamel and dentin were 4.3 and 2.3 mm Al/2.0 mm specimen, respectively. The values for materials ranged from 5.1 to 12.9 for conventional luting materials, from 3.4 to 6.3 for RMGIs, from less than 0.5 to 7.3 for MMA resins, and from 2.3 to 9.9 for the composite luting materials. A zinc phosphate cement showed the highest value (12.9), whereas five shades of MMA resin resulted in the lowest value (less than 0.5). Two RMGIs and three composite luting materials exhibited radiopacity values between those of enamel (4.3) and dentin (2.3). It can be concluded that the radiopacity value of luting materials varies considerably, and that care must be taken when selecting luting materials, considering the material composition of restorations. (J Oral Sci 51, 223-230, 2009)

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“…Subsequently, the specimens were rinsed thoroughly with deionized water and immersed in artificial saliva, at a pH of 7.0 (10 mL/block) at room temperature for 2h, between the erosive challenges 17 and overnight 13,16 . The artificial saliva was created according to Amaechi et al 18 .…”

Section: Erosive Challengementioning

confidence: 99%

Effects of erosive challenge on the morphology and surface properties of luting cements

Gondim

Medeiros

Costa

et al. 2016

Rev. odontol. UNESP

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ResumoIntrodução: Poucos estudos investigaram as propriedades de superfície de cimentos após desafio erosivo. Objetivo: Avaliar a rugosidade da superfície (Ra), dureza Vickers (VHN) e morfologia de superfície de 4 cimentos após desafio erosivo. Material e método: Vinte amostras de cada cimento foram preparadas (4×2mm) e divididas em grupo experimental (desafio erosivo) e controle (saliva artificial) (n=10): Rely X U200 (U200); Rely X ARC (ARC); Ketac Cem Easy Mix (Ketac) e Fosfato de Zinco (ZnP). O desafio erosivo foi realizado com quatro ciclos erosivos diárias (90s) em bebida à base de cola e 2h em saliva artificial durante 7 dias. As leituras de Ra e VHN foram realizadas antes e após erosão. A porcentagem de perda de dureza (%VHN) foi obtida depois da erosão. A morfologia de superfície foi analisada por microscopia eletrônica de varredura (MEV). Foram utilizados testes de ANOVA, Tukey e T-Student (α=0,05). Resultado: Após a erosão, foi observado aumento dos valores de Ra em todos os cimentos testados, e os grupos U200 e ZNP tiveram a maior %VHN. Após imersão em saliva, apenas os grupos U200 e ZnP tiveram aumento significativo nos valores de Ra e não houve diferenças significativas entre os grupos quanto à %VHN. A análise em MEV mostrou que os grupos Ketac e ZNP apresentaram superfícies rugosas e porosas, e o grupo U200 apresentou maior degradação da matriz comparado ao grupo ARC. Conclusão: O desafio erosivo com bebida a base de cola afetou as propriedades de superfície de todos os cimentos.Descritores: Erosão dentária; cimentos de resina; cimentos de ionômero de vidro; testes de dureza. AbstractIntroduction: Few studies investigated the surface properties of luting cements after erosive challenge. Objective: To evaluate the surface roughness (Ra), Vickers hardness (VHN) and morphology of 4 luting cements after erosive challenge. Material and method: Twenty specimens of each cement were prepared (4×2mm) and divided into experimental (erosive challenge) and control (artificial saliva) groups (n=10): Rely X U200 (U200); Rely X ARC (ARC); Ketac Cem Easy Mix (Ketac) and Zinc phosphate (ZnP). The erosive challenge was performed by four daily erosive cycles (90s) in a cola drink and 2 h in artificial saliva over 7 days. Ra and VHN readings were performed before and after erosion. The percentage of hardness loss (%VHN) was obtained after erosion. The surface morphology was analyzed by scanning electron microscopy (SEM). ANOVA, Tukey and Student-T tests were used (α=0.05). Result: After erosion, all luting cements had increase in Ra values and U200 and ZnP groups had the highest %VHN. After saliva immersion, only U200 and ZnP groups had significant increases in Ra values and there were no significant differences among the groups in %VHN. SEM analysis showed that Ketac and ZnP groups had rough and porous surfaces, and U200 group had higher resin matrix degradation than ARC group. Conclusion: Erosive challenge with a cola drink affected the surface properties of all luting cements.

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Mechanical and physical properties of contemporary dental luting agents

Cited by 218 publications

References 29 publications

Radiopacity of Dental Materials: An Overview

Radiopacity of Dental Materials: An Overview

Radiopacity of conventional, resin-modified glass ionomer, and resin-based luting materials

Effects of erosive challenge on the morphology and surface properties of luting cements

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