<i>In vitro</i> evaluation of marginal and internal adaptation after occlusal stressing of indirect class II composite restorations with different resinous bases

Dietschi, Didier; Olsburgh, Steven; Krejci, Ivo; Davidson, C.L.

doi:10.1034/j.1600-0722.2003.00004.x

Cited by 55 publications

(57 citation statements)

References 25 publications

(25 reference statements)

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“…In the literature, larger proportions of enamel micro-fractures were observed in in-vitro mechanical loading tests conducted on cavities with a butt margin design [55,[57][58][59]. The parallel orientation of enamel prisms in the axial wall, in combination with the weakened region of non-bevelled enamel after phosphoric acid conditioning could be an explanation for these findings and may led to a reduction of marginal adaptation after TML.…”

Section: Discussionmentioning

confidence: 99%

Marginal adaptation of ceramic and composite inlays in minimally invasive mod cavities

et al. 2013

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OBJECTIVES: This study aims to evaluate the effect of a minimally invasive mesial-occlusaldistal (mod) preparation on the marginal adaptation of ceramic and composite inlays with the aim of saving sound dental substance. MATERIALS AND METHODS: Class II mod cavities were prepared in 50 extracted human molars and randomly allocated to five groups (n = 10). In all groups, the mesialproximal box margins were located in the dentin, 1 mm below the cementoenamel junction (CEJ), while the distal box margins were 1 mm above the CEJ. In groups A and B, conventional standard preparations with a divergent angle of = 6°were prepared. In groups C, D, and E, minimally invasive standard preparations with a convergent angle of = 10°were prepared. In groups A and D, composite inlays and, in groups B and C, ceramic inlays were fabricated (chairside economical restoration of esthetic ceramics (CEREC)) and adhesively inserted. In group E, a direct composite filling using the incremental technique was placed. Replicas were taken before and after thermomechanical loading (1,200,000 cycles, 50/5°C, max. load 49 N). Marginal integrity (tooth-luting composite, luting composite-inlay) was evaluated by scanning electron microscopy (×200). The percentage of continuous margins in the different locations was compared between and within groups before and after cycling, using ANOVA and Scheffé post hoc test. RESULTS: After the thermomechanical loading, no significant differences were observed between the different groups with respect to the interface of luting composite-inlay. At the interface of toothluting composite for preparations involving the dentin, groups A and B behaved significantly better compared to the control group E, which in turn were not different to groups C and D. CONCLUSION: Composite and ceramic inlays inserted in minimally invasive prepared mod cavities result in margins not different from those of inlays placed in conventional mod preparations. Direct composite filling margins, however, were inferior to those attained by conventional indirect restorations. CLINICAL RELEVANCE: Minimally invasive preparations for mod inlays with undercuts show marginal adaptation equal to that of conventional inlay preparation design. Keywords: Composite inlay, ceramic inlay; minimally-invasive; marginal adaption Declaration of interests:The authors declare they have no conflicts of interest. AbstractObjectives To evaluate the effect of a minimally-invasive mod-preparation on the marginal adaptation of ceramic and composite inlays with the aim of saving sound dental substance. Materials and MethodsClass II mod-cavities were prepared in 50 extracted human molars and randomly allocated to five groups (n=10). In all groups, the mesial-proximal-box-margins were located in dentin, 1 mm below the cementoenamel junction (CEJ), while the distal-boxmargins were 1 mm above the CEJ. In group A and B, conventional standard preparations with a divergent angle of α = 6° were prepared. In Group C, D and E minimally invasive standard preparation...

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Section: Discussionmentioning

confidence: 99%

Marginal adaptation of ceramic and composite inlays in minimally invasive mod cavities

et al. 2013

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“…Actually, the elastic deformation of a more 'flexible' material (e-modulus lower than the restorative material) [4,22] placed close to or within the adhesive interface might help to absorb immediate (resin polymerization shrinkage) and delayed strains (spontaneous postpolymerization and functional forces). The importance of the elastic layer has been shown as early as 1990 [21,22]; since then, several studies confirmed the validity of this concept [10,12,40,42,43]. A last potential explanation for the inferior efficiency of such a one bottle adhesive is an insufficient or total lack of polymerization of the very thin resin layer left after adhesive placement and solvent evaporation (only a few microns) [44].…”

Section: Adaptation To Dentinmentioning

confidence: 72%

“…This very favourable finding likely reflects the influence of prism orientation in bonding efficiency to acidetched enamel; it is known that a bevelled margin with enamel prisms cut roughly perpendicular to their long axis is a configuration more favourable than a butt margin [18,39]. Actually, larger proportions of enamel micro-cracks were observed in in vitro mechanical loading tests conducted on cavities with a butt margin design [25,26,38,40]. This speaks again in favour of placing a bevel around cavities to be filled with a direct technique, wherever enamel thickness is 1 mm or more [41,58].…”

Section: Marginal Adaptation To Enamelmentioning

confidence: 99%

Marginal and internal adaptation of class II restorations after immediate or delayed composite placement

Dietschi

Monasevic

Krejci

et al. 2002

Journal of Dentistry

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Direct class II composite restorations still represent a challenge, particularly when proximal limits extend below the CEJ. The aim of this in vitro study was to evaluate the influence of the type of adhesive and the delay between adhesive placement and composite insertion on restoration adaptation. Direct class II MOD box-shaped composite restorations (n ¼ 8 per group) were placed on intact human third molars, with proximal margins 1 mm above or under CEJ. All cavities were filled with a horizontal layering technique, immediately after adhesive placement (IP) or after a 24 h delay (DP). A filled three-component adhesive (OptiBond FL: OB) and a single-bottle, unfilled one (Prime & Bond 2.1: PB) were tested. Marginal adaptation was assessed before and after each phase of mechanical loading (250,000 cycles at 50 N, 250,000 cycles at 75 N and 500,000 cycles at 100 N); internal adaptation was evaluated after test completion. Gold-plated resin replicas were observed in the SEM and restoration quality evaluated in percentages of continuity (C ) at the margins and within the internal interface, after sample section. Adaptation to beveled enamel proved satisfactory in all groups. After loading, adaptation to gingival dentin degraded more in PB-IP (C ¼ 55.1%) than PB-DP (C ¼ 86.9%) or OB-DP (C ¼ 89%). More internal defects were observed in PB samples (IP: C ¼ 79.2% and DP: C ¼ 86.3%) compared to OB samples (IP: C ¼ 97.4% and DP: C ¼ 98.3%). The filled adhesive (OB) produced a better adaptation than the 'one-bottle' brand (PB), hypothetically by forming a stress-absorbing layer, limiting the development of adhesive failures. Postponing occlusal loading (such as the indirect approach) improved also restoration adaptation. q

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“…25,26 Since for the anterior vestibular restorations like composite veneers, the most relevant background is white, we also preferred to use white background in our study. 32 Resin composites used in dental restorations underwent color change when exposed to various storage media. The often-used solutions in research studies are coffee, black tea, red wine, coke, energy drinks, and some kind of soft beverages.…”

Section: Discussionmentioning

confidence: 99%

Discoloration Effects of Traditional Turkish Beverages on different Composite Restoratives

Bağlar¹,

Keskin²,

Orun³

et al. 2017

The Journal of Contemporary Dental Practice

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Aim:The aim of this study was to evaluate the discoloring effects of five beverages including, especially, traditional Turkish ones on five commonly used dental composites by using a spectrophotometer device. Materials and methods:Five methacrylate-based composites (shade A2) were selected to evaluate their color stability (175 disk samples). Four of them (Filtek Ultimate Universal, Clearfil Majesty ES-2, Tetric EvoCeram, and Cavex Quadrant Universal LC) were nanofilled universal composites for both anterior and posterior restorations, and one (Clearfil Majesty Posterior) was nano-superfilled for posterior restorations. The tested beverages were tamarind syrup, ottoman syrup, turnip juice, pomegranate juice, and distilled water (control). All samples were kept in an incubator at 37°C for 12 days (measured at 3rd, 6th, 12th day intervals) in immersion solutions which was equivalent to 1 year in vivo. Color measurements were made with VITA Easyshade Advance (Vident, Brea, CA) spectrophotometer device according to CIE L*a*b* system. Statistical analysis was performed with analysis of variance and least significant difference test to analyze differences in L*a*b* and ∆E values.Results: All materials showed significant discoloration (p < 0.05) when compared with the control group. The highest ∆E was observed in turnip juice, whereas ottoman syrup had the lowest ∆E. Tetric EvoCeram showed the lowest ∆E, while Clearfil Majesty ES-2 showed the highest ∆E. Conclusion:In all the groups tested, clinically unacceptable ∆E values were obtained. Although color stability of methacrylatebased composites has been widely investigated, this has not been done before with these kinds of immersion solutions.Clinical significance: Potential discoloration might be limited by dietary adjustments based on in vitro evaluations.

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In vitro evaluation of marginal and internal adaptation after occlusal stressing of indirect class II composite restorations with different resinous bases

Cited by 55 publications

References 25 publications

Marginal adaptation of ceramic and composite inlays in minimally invasive mod cavities

Marginal adaptation of ceramic and composite inlays in minimally invasive mod cavities

Marginal and internal adaptation of class II restorations after immediate or delayed composite placement

Discoloration Effects of Traditional Turkish Beverages on different Composite Restoratives

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