Microleakage

Taylor, M.J.; Lynch, E

doi:10.1016/0300-5712(92)90002-t

Cited by 194 publications

(171 citation statements)

References 74 publications

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“…This is the most commonly used method to assess microleakage of dental materials. 15 It is easy to perform, fast, and economical, but the shortcoming of the technique is the subjectivity of reading the specimens. 16 In our study all specimens were evaluated by the two operators at two times to evaluate measurement error.…”

Section: Discussionmentioning

confidence: 99%

Microleakage under Metallic and Ceramic Brackets Bonded with Orthodontic Self-Etching Primer Systems

Uysal

Ülker

Ramoğlu

et al. 2008

The Angle Orthodontist

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Objective: To compare the in vitro microleakage of orthodontic brackets (metal and ceramic) between enamel-adhesive and adhesive-bracket interfaces at the occlusal and gingival sides produced by self-etching primer system with that of conventional acid etching and bonding. Materials and Method: Sixty freshly extracted human mandibular premolar teeth were used in this study. The teeth were separated into four groups of 15 teeth each and received the following treatments: Group 1, 37% phosphoric acid gel ϩ Transbond XT liquid primer ϩ stainless steel bracket; Group 2, Transbond Plus Self-Etching Primer (TSEP) ϩ stainless steel bracket; Group 3, 37% phosphoric acid gel ϩ Transbond XT liquid primer ϩ ceramic bracket; Group 4, TSEP ϩ ceramic bracket. After curing, specimens were further sealed with nail varnish, stained with 0.5% basic fuchsine for 24 hours, sectioned and examined under a stereomicroscope, and scored for microleakage for the enamel-adhesive and bracket-adhesive interfaces from both occlusal and gingival margins. Statistical analyses were performed using Kruskal-Wallis and Mann-Whitney U tests. Results:The gingival sides in all groups exhibited higher microleakage scores compared with those observed in occlusal sides for both adhesive interfaces. Enamel-adhesive interfaces exhibited more microleakage than did the adhesive-bracket interfaces. Brackets bonded with self-etching primer system showed significantly higher microleakage at the enamel-adhesive interface of the gingival side. Conclusions: TSEP causes more microleakage between enamel-adhesive interfaces, which may lead to lower bond strength and/or white-spot lesions.

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Section: Discussionmentioning

confidence: 99%

Microleakage under Metallic and Ceramic Brackets Bonded with Orthodontic Self-Etching Primer Systems

Uysal

Ülker

Ramoğlu

et al. 2008

The Angle Orthodontist

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“…[14][15] The use of silver nitrate in combination with a photo developing solution as a chemical tracer is only distinct from the use of dyes in that the tracers rely on the reaction between both chemicals used. 14,16 Silver stains resist disruption by the coolant when sectioning the tooth, although they are passively deposited. [17][18] In general, the interpretation of silver staining results is subject to controversy.…”

Section: Methodsmentioning

confidence: 99%

Marginal Integrity of Partial Ceramic Crowns Within Dentin With Different Luting Techniques and Materials

Schenke

Hiller²,

Schmalz³

et al. 2008

Operative Dentistry

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Operative Dentistry, 2008, 33-5, 516-525 SUMMARYThis in vitro study evaluated the marginal integrity of partial ceramic crowns (PCCs) luted with or without a resin-coating and compared the results with the marginal sealing of a recently introduced self-adhesive universal resin cement. PCC preparations were performed on 84 extracted human molars, with proximal margins placed 1 mm below the cemento-enamel junction. The PCCs were fabricated from Vita Mark II ceramic (Vita) using the Cerec-3 Unit (Sirona). The prepared teeth were assigned to three groups: 1) conventional luting technique (n=36), 2) resin-coating luting technique (n=36) or 3) recently introduced self-adhesive universal resin cement (n=12). Resin coating improves the marginal seal of partial ceramic crowns to dentin compared to conventional luting, especially at the dentin/composite interface. However, the self-adhesive material RelyX Unicem shows significantly better marginal integrity than the other materials tested. resin-coating (SYR); 3) RelyX Unicem (REX).After thermocycling and mechanical loading (TC: 5000 cycles at 5°C/55°C; 30 seconds/cycle; ML:500000 cycles at 72.5 N, 1.6 Hz), microleakage was assessed by evaluating silver staining (%) on multiple tooth sections. Ceramic/composite-, resin-coating/composite-(where applicable) and dentin/composite-interfaces were evaluated separately. The data were statistically analyzed with the Mann-Whitney-U-test and the Error Rates Method.In Groups 1 and 2, the evaluation of microleakage at dentin showed better marginal integrity when the resin-coating technique was applied (EVR, PAR, SYR: 18-53%) than within the conventional luting technique group (EVC, PAC, SYC: 58-67%). However, the lowest microleakage values were found for RelyX Unicem (REX: 15%).In conclusion, resin-coating may improve the marginal sealing within dentin, depending on the materials used. Luting with a self-adhesive universal resin cement showed the best marginal sealing of all groups.

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“…[32][33][34] Although this study was conducted in vitro, which can be a screening apparatus for ensuing in vivo studies, previous research indicates that data obtained from in vitro microleakage testing may be useful, but not always necessarily reproducible in clinical in vivo settings. [35][36][37] Also, in performing in vitro microleakage investigations, obtaining conclusive information can be problematic, since vast differences in research protocols are reported in the dental literature.…”

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confidence: 99%

Effect of Single Step Adhesives on the Marginal Permeability of Class V Resin Composites

Owens¹,

Johnson²

2007

Operative Dentistry

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SUMMARYThis in vitro study evaluated the coronal and apical marginal microleakage of four self-etch, seventh generation adhesive systems.Sixty non-carious human molars were randomly assigned to four groups (n=12). Class V cavities were prepared on the facial or lingual surface of each tooth with coronal margins in enamel and apical margins in cementum (dentin) at the cementoenamel junction. The preparations were restored using four self-etch adhesive systems (iBond, G-Bond, Xeno IV and Clearfil S 3 Bond) and a control (no adhesive), followed by insertion of Gradia Direct microfilled hybrid resin composite. The teeth (specimens) were thermocycled 1,000 cycles, immersed in 1% methylene blue dye for 24 hours and invested in acrylic resin. The specimen blocks were then sectioned longitudinally, with dye penetration (microleakage) examined using a 20x binocular microscope. Coronal and apical margins were scored separately for microleakage using a 0-3 ordinal ranking system. Data were analyzed using non-parametric tests at a p<0.05 level of significance. A comparison of adhesive and control groups at the coronal and apical margins revealed that significant (p<.0001) differences were exhibited. At the coronal margin, Xeno IV revealed significantly less leakage than the other adhesives, with Clearfil S 3 Bond exhibiting significantly less leakage at the apical margin. Groups with no adhesive treatment (control) showed significantly greater leakage at both the coronal and apical margin locations. A Wilcoxon signed rank test showed no significant differences at the coronal compared to the apical margins of the four adhesive systems and control tested.

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Microleakage

Abstract: A critical review of techniques used in the assessment of microleakage in dental restorations is presented. These techniques include the use of air pressure, bacteria, radioisotopes, electrochemistry, chemical tracers and dye penetration. Wide variations in methodologies are revealed.

Cited by 194 publications

References 74 publications

Microleakage under Metallic and Ceramic Brackets Bonded with Orthodontic Self-Etching Primer Systems

Microleakage under Metallic and Ceramic Brackets Bonded with Orthodontic Self-Etching Primer Systems

Marginal Integrity of Partial Ceramic Crowns Within Dentin With Different Luting Techniques and Materials

Effect of Single Step Adhesives on the Marginal Permeability of Class V Resin Composites

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