Efficacy of direct restorative materials in proximal box elevation on the margin quality and fracture resistance of molars restored with CAD/CAM onlays

Grubbs, Thomas David

doi:10.17077/etd.5213gkyb

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…Therefore, sealing ability of adhesive materials is of paramount relevance to ensure longevity of these restorations (3), being nanoleakage test one of the laboratory methods proposed for its evaluation and, by extension, the quality of the hybrid layer established (11,13,14). Up to the present time, there are limited studies evaluating the advantages and limitations of DME technique, and most of them are in vitro and focused on marginal adaptation of indirect restorations (8-10,15-18) fracture resistance (10,17) and bond strength (19). Only two studies have evaluated the sealing ability with microleakage tests, reporting a negative effect of DME technique regardless adhesive strategy (18) and resin composite consistency (20).…”

Section: Introductionmentioning

confidence: 99%

Influence of the adhesive strategy in the sealing ability of resin composite inlays after deep margin elevation

2021

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Background: The aim of this study was to determine the influence of the gingival margin position and the adhesive strategy selected to perform deep margin elevation (DME) in marginal sealing of resin composite inlays by a nanoleakage test. Material and Methods: 12 sound third molars were selected and expulsive MOD cavities for inlays were prepared. Experimental groups were established according to gingival margin location (enamel: 1 mm above cemento-enamel junction (CEJ), dentin: 1 mm below CEJ, or DME, and the adhesive strategy used to lute inlays and elevate the gingival margin. Therefore, the six experimental groups were: 1) Enamel + etch-and-rinse adhesive (ERA) Adper Scotchbond 1XT (SB1XT); 2) Dentin + SB1XT; 3) DME + SB1XT; 4) Enamel + self-etching adhesive (SEA) with enamel selective etching Clearfil SE Bond (CSE); 5) Dentin + CSE; 6) DME + CSE. Resin composite inlays were constructed (Gradia Indirect) and all luted with the same resin cement (RelyX ARC). Specimens were submitted to nanoleakage test. Results were analyzed by Kruskal-Wallis and Mann-Whitney U tests with Bonferroni correction (p<0.05). Results: A perfect sealing ability was evidenced for experimental groups with gingival margins on enamel. Similar nanoleakage values were determined when CSE adhesive was applied regardless the gingival margin position. The highest silver nitrate infiltration was detected for elevated margins with the ERA SB1XT. Conclusions: The SEA Clearfil SE Bond showed higher sealing ability than the ERA Adper Scotchbond 1XT when margins were located on dentin, regardless margin elevation. Gingival margins on enamel together with enamel acid etching provided an excellent sealing with both adhesive systems.

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Section: Introductionmentioning

confidence: 99%

Influence of the adhesive strategy in the sealing ability of resin composite inlays after deep margin elevation

2021

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“…Marginal qualities were classi ed according to the following criteria: 'continuous margin', 'gap/irregularity', or 'not assessable/artifact'. The lengths of the continuous margin and total margin were measured and recorded, and the percentage of marginal integrity was calculated as the continuous margin/total margin, according to a previous study [17].…”

Section: Marginal Integrity Analysismentioning

confidence: 99%

Influence of deep margin elevation on marginal quality of root–filled molars restored with different onlays

Zhang,

Liu

et al. 2024

Preprint

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Background This study evaluated the influence of deep margin elevation (DME) with composite resin when applied to deep margin defects in root–filled molars with mesiooccluso–distal (MOD) cavities, which were subsequently restored with computer-aided designed/computer-aided manufacturing (CAD/CAM) ceramic or composite onlays. Methods Forty–eight complete human third molars were removed and randomly distributed into 6 groups (n = 8). The MOD cavities were prepared with the distal gingival margin below the cementoenamel junction (CEJ) 2 mm and the mesial gingival margin above the CEJ 1 mm. All molars underwent endodontic treatment. The distal gingival margin was filled with 2 mm thick Filtek™ Z350 XT Flowable resin (FF) or Filtek™ Z350 XT Universal resin (FU) to the CEJ. Then, all molars were restored with onlays made by Vita MarkⅡ CAD (VC)/IPS e.max CAD (IC)/SHOFU ceramage (SC). Epoxy replicates were made before and after thermomechanical loading (5 ~ 55°C, 5000 cycles; 10 Hz at 360 N, 100000 cycles). Scanning electron microscopy (SEM) analysis was performed to analyze margin integrity. Statistical analysis was performed. Results All the interfaces exhibited a decrease in margin quality after thermomechanical loading(TML) (P < 0.05). At the onlay–resin interface, when comparing margin integrity with that of the same DME resin before TML, there were no significant differences among the FF/VC, FF/IC and FF/SC groups (P > 0.05), and there were no significant differences among the FU/VC, FU/IC and FU/SC groups (P > 0.05). After TML, FF/IC > FF/SC > FF/VC, and FU/IC > FU/SC > FU/VC, there was a significant differences among these groups (P < 0.05). When comparing marginal integrity with the same onlay material, there was no significant difference in marginal integrity between FU/SC and FF/SC, FU/IC and FF/IC, or FU/VC and FF/VC before and after TML (P > 0.05). At the resin‒dentin interface, before and after TML, the margin integrity of the dentin‒paste resin was greater than that of the dentin–flowable resin (P < 0.05). Conclusions In this study, after TML, the best marginal integrity was obtained at resin–onlay interface with IPS e.max CAD material. However, DME with paste or flowable resin had no significant effect on the marginal integrity of the resin–onlay interface. At the dentin–resin interface, this study revealed that the marginal integrity of the flowable resin was lower than that of the paste resin, but both resulted in acceptable marginal quality for use as DME materials.

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“…A destruição da superfície interproximal do elemento dentário é uma situação clínica desafiadora, pois com a falta da estrutura do esmalte, presença de concavidades radiculares e interferência do tecido gengival, o profissional deve ter conhecimento de procedimentos adjuvantes para restaurar caixas proximais profundas (GRUBBS et al, 2020).…”

Section: Lesões Cariosas Interproximais X Margens Cervicais Profundasunclassified

Elevação de Margem Cervical na Reabilitação de Dentes Posteriores: Revisão de Literatura / Cervical Margin Elevation in Posterior Teeth Rehabilitation: Literature review

2021

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A cárie interproximal representa grande desafio aos Cirurgiões-Dentistas. Uma situação clínica muito comum é a restauração em dentes posteriores com cárie interproximal que estende abaixo da junção cemento-esmalte. Tendo objetivo de realizar uma revisão de literatura sobre elevação de margem cervical em dentição posterior, abordando os principais critérios do tratamento. Este é um estudo descritivo e qualitativo, analisando a literatura científica, a partir de trabalhos publicados e em bases de dados, que aborda a elevação da margem cervical. Com a falta da estrutura do esmalte, presença de concavidades radiculares e interferência do tecido gengival, o profissional deve ter conhecimento para restaurar caixas proximais profundas. É indispensável o respeito da integridade do periodonto, gerando uma dificuldade na realização do método restaurativo de acordo os padrões ideais. Concluímos que a técnica é um procedimento com etapas e critérios que devem ser seguidos para que não haja complicações.

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Efficacy of direct restorative materials in proximal box elevation on the margin quality and fracture resistance of molars restored with CAD/CAM onlays

Cited by 3 publications

References 14 publications

Influence of the adhesive strategy in the sealing ability of resin composite inlays after deep margin elevation

Influence of the adhesive strategy in the sealing ability of resin composite inlays after deep margin elevation

Influence of deep margin elevation on marginal quality of root–filled molars restored with different onlays

Elevação de Margem Cervical na Reabilitação de Dentes Posteriores: Revisão de Literatura / Cervical Margin Elevation in Posterior Teeth Rehabilitation: Literature review

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