Cavity Preparation and Influence of Restorative Materials on the Prevention of Secondary Caries

Perito, Mario Alberto Marcondes; Jorge, Ana Carolina Tedesco; Freitas, Patrícia Moreira de; Cassoni, Alessandra; Rodrigues, José Augusto

doi:10.1089/pho.2008.2394

Cited by 20 publications

(25 citation statements)

References 29 publications

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“…The findings of this study confirmed the outcomes of Hossain et al 16 who found that the quantities of calcium (Ca weight %) and phosphorus (P weight %) of dentin were significantly greater in laser cavities compared to bur cavities. Perito et al 15 reported less development of secondary caries around the cavities prepared by Er:YAG laser than around bur-prepared cavities. In contrast, Celik et al 28 found that cavity preparation with bur or erbium family lasers did not significantly affect the composition and microhardness of dentin structure.…”

Section: Discussionmentioning

confidence: 98%

Structural and Morphological Changes in Human Dentin after Ablative and Subablative Er:YAG Laser Irradiation

2016

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Introduction: This study investigated the influence of Erbium-Doped Yttrium Aluminum Garnet (Er:YAG) laser on microhardness, chemical composition and subsurface morphology of dentin cavity walls. Methods: Forty sound human premolars were selected and randomly assigned into four groups. Class V cavities were prepared either with an Er:YAG laser (groups 1 and 2; 15 Hz, 250 mJ for enamel, 10 Hz, 200 mJ for dentin) or with a high speed handpiece (groups 3 and 4). The specimens in groups 1 and 3 served as the control, whereas those in groups 2 and 4 were exposed to subablative laser irradiation following cavity preparation (10 Hz, 50 mJ). After bisecting the specimens, one half was subjected to microhardness assessment and the other half was evaluated by SEM-EDS analysis. Results: Microhardness was significantly greater in the specimens prepared by both ablative and subablative laser irradiation (group 2) than that of the bur-prepared cavities (groups 3 and 4) (P < 0.05). The quantity of calcium ion was significantly greater in cavities prepared by the Er:YAG laser (groups 1 and 2) compared to that of the bur cavities (groups 3 and 4) (P < 0.05). Subablative irradiation improved microhardness and weight percentage of calcium ion in both laser and bur cavities, but the difference was not significant compared to that of the relevant control group (P > 0.05). Conclusion: Cavity preparation with an Er:YAG laser could be considered as an alternative to the conventional method of drilling, as it enhances the mechanical and compositional properties of lased dentin, especially when combined by subablative irradiation.

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Section: Discussionmentioning

confidence: 98%

Structural and Morphological Changes in Human Dentin after Ablative and Subablative Er:YAG Laser Irradiation

2016

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“…Fluorides may also be released from restorative materials as a preventive method. [1][2][3][4][5] Among them, adhesives and composite resins (CR) seem to provide little or no cariostatic effect. 3 On the other hand, conventional glass ionomer cements (GI) have shown the highest cariostatic potential, and glass ionomer/resin composite hybrid materials (RM) have shown an intermediate effect on caries prevention.…”

Section: Introductionmentioning

confidence: 99%

“…3 On the other hand, conventional glass ionomer cements (GI) have shown the highest cariostatic potential, and glass ionomer/resin composite hybrid materials (RM) have shown an intermediate effect on caries prevention. [3][4][5] Several in vitro studies have suggested the use of highintensity lasers at low doses, such as erbium and CO 2 , as a tool in the prevention of dental caries. [5][6][7][8][9][10] Some in vitro and in situ studies were able to demonstrate the potential of erbium lasers to increase enamel acid resistance.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5] Several in vitro studies have suggested the use of highintensity lasers at low doses, such as erbium and CO 2 , as a tool in the prevention of dental caries. [5][6][7][8][9][10] Some in vitro and in situ studies were able to demonstrate the potential of erbium lasers to increase enamel acid resistance. [5][6][7][8][9][10] However, erbium lasers were introduced in dentistry for cavity preparation, as they are well absorbed by water and hydroxyl radical in the hydroxyapatite, and they can promote enamel removal with minimal anesthesia needed.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Cavity Preparation with Er,Cr:YSGG Laser and Restorative Materials on In Situ Secondary Caries Development

Jorge

Cassoni

Freitas

et al. 2015

Photomedicine and Laser Surgery

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Objective: The aim of this study was to evaluate the influence of cavity preparation and restorative materials containing fluorides in the prevention of secondary caries lesion development in situ. Methods: A total of 120 blocks obtained from human teeth were divided into two groups and standardized cavities were prepared using diamond burs (DB) or Er,Cr:YSGG-laser [20 Hz, 4.0W, 55% water, 65% air (LA)]. They were divided into three subgroups according to the restorative material (n = 20): glass-ionomer cement (GI), resin modified glassionomer (RM) or composite resin (CR). Blocks were fixed in palatal intra-oral appliances worn in situ by 20 human volunteers, who dropped 20% sucrose solution eight times daily. After 21 days, blocks were removed and restorations were cross-sectioned to evaluate microhardness [Knoop hardness number (KHN)] underneath enamel surface from 30 to 200 lm. Factors ''cavity preparation,'' ''restorative materials,'' and ''depth'' were evaluated by three way ANOVA, followed by Tukey test ( p < 0.05). Results: The results showed lower microhardness in cavities prepared with DB than in cavities prepared with LA. At 30 lm, there were no statistical significant differences with regard to ''cavity preparation'' or ''restorative materials'' factors. In depth evaluation, the enamel microhardness progressively increased as a function of depth for the GI groups. In the groups prepared with LA at 60 lm/90 lm, there were no significant differences between GI and RM materials, whose microhardnesses were significantly higher than that of CR. Conclusions: Cavity preparation using Er,Cr:YSGG laser increases caries resistance of enamel walls, and reduce caries lesion depth development regardless of fluoride presence in the restorative material. CR showed higher caries lesion development than GI, and RM showed intermediate results.

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“…Moreover, pH cycle experiments simulate oral cariogenic conditions and are conducted to provide information regarding enamel demineralization of restorative materials and adhesives used in cavity preparation techniques. 4,23 The objective of this study was to evaluate the inhibition of enamel demineralization around restorative materials after QTH, LED, or AL activation according to the Knoop microhardness (KHN) profile of the enamel and the indirect degree of conversion in the superficial and deep areas of restorative materials.…”

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confidence: 99%

Influence of Photoactivation Source on Restorative Materials and Enamel Demineralization

Popoff

Rodrigues²,

Aras³

et al. 2014

Photomedicine and Laser Surgery

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Objective: The objective of this study was to evaluate the influence of the photoactivation source on the polymerization depth of restorative materials and its effects on resistance to enamel demineralization. Background data: Argon-ion laser (AL) irradiation itself provides a reduced depth of caries lesions in sound enamel. Methods: Eighteen human teeth were sectioned into 36 blocks and distributed into two groups according to the respective restorative material: resin-modified glass ionomer material (RMGI) (Vitremer-3M ESPE; A3; n = 18) and composite resin (CR) (Z350-3M ESPE; n = 18). Each group was subdivided into three subgroups and activated by a quartz-tungsten-halogen (QTH) lamp, an AL, or a light-emitting diode (LED) (n = 6). Knoop microhardness (KHN) analysis of the materials was evaluated at two different depths: 0 and 1.6 mm from the enamel surface. The blocks were thermocycled and submitted to five demineralization-remineralization cycles at 37°C. The KHN values of the enamel surface (0 mm) were evaluated. The specimens were longitudinally sectioned, and the restorative material was evaluated at a depth of 1.6 mm. Data were evaluated by two way analysis of variance (ANOVA) and Tukey tests ( p < 0.05). The evaluation of subsuperficial enamel demineralization by KHN analysis was conducted by seven indentations located at 100 lm from the restored cavity. Data were evaluated by three way ANOVA and Tukey tests ( p < 0.05). Results: Comparing the two restorative materials, the KHN values at the surface (0 mm) were greater for CR, whereas at 1.6 mm, they were greater for RMGI. In addition, there was less development of enamel demineralization around RMGI restorations than CR restorations. Moreover, there were statistically significant differences on subsuperficial enamel demineralization between the two restorative materials and between the three photoactivation methods ( p < 0.05); RMGI presented the highest KHN values, and QTH and AL presented the lowest. Conclusions: The photoactivation source did not influence superficial enamel demineralization, but LED activation positively influenced the subsuperficial microhardness of enamel.

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Cavity Preparation and Influence of Restorative Materials on the Prevention of Secondary Caries

Abstract: There was less development of caries lesion around LA-prepared cavities than around the DB-prepared cavities; however, no synergistic cariostatic effect was observed between the Er:YAG laser and glass ionomer cement.

Cited by 20 publications

References 29 publications

Structural and Morphological Changes in Human Dentin after Ablative and Subablative Er:YAG Laser Irradiation

Structural and Morphological Changes in Human Dentin after Ablative and Subablative Er:YAG Laser Irradiation

Influence of Cavity Preparation with Er,Cr:YSGG Laser and Restorative Materials on In Situ Secondary Caries Development

Influence of Photoactivation Source on Restorative Materials and Enamel Demineralization

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