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Marginal adaptation of heat-pressed glass-ceramic veneers to Class 3 composite restorations in vitro.
Oper Dent. 1999 Jul-Aug; 24(4):233-44.OD

Abstract

The aim of the present in vitro study was to compare the marginal adaptation and integrity of heat-pressed glass-ceramic veneers to adjacent class 3 composite restorations and to enamel using four dual-curing composite resin cements of different viscosity with their corresponding dentin bonding agents. Thirty-six caries-free human maxillary incisors were first restored with mesial and distal class 3 composite restorations and then prepared for facial ceramic veneers. The cavity margins of the veneers were located either in the class 3 composite restorations or in the residual enamel. Heat-pressed glass-ceramic veneers (IPS Empress) were inserted adhesively using one of the following four luting systems in nine teeth: SonoCem (SC) with EBS; Variolink Ultra (VU), Variolink High-Viscosity (VHV), and Variolink Low-Viscosity (VLV) with Syntac. The veneer margins in the region of the composite restoration and in the region apical to the composite restoration (ceramic/composite resin cement interfaces, composite resin cement/composite restoration interface, and composite resin cement/enamel interface) were evaluated before and after thermo-cycling and mechanical loading (TCML) by quantitative margin analysis under a scanning electron microscope (SEM) using an image analysis system. Furthermore, microleakage was assessed in each tooth by dye penetration after TCML. For all luting systems, SEM analysis revealed excellent marginal adaptation of the ceramic veneers to the composite restorations as well as to enamel. The median percentages of marginal gap formation were 1.1% and less before TCML and 5.1% and less after TCML. The error-rates method revealed no statistical influence of the interface or of the viscosity of the luting material. Maximal values of dye penetration showed a significantly higher microleakage at veneers cemented with VU (median: 86.4%) compared to SC (median: 13.3%). In conclusion, the present data demonstrated that existing clinically acceptable class 3 composite restorations have no negative influence on the marginal adaptation of ceramic veneers. This was valid independent of the viscosity of the dual-curing composite resin cement when SC, VHV, or VLV was used.

Authors+Show Affiliations

Christgau M
University of Regensburg, Dental School, Department of Operative Dentistry and Periodontology, Germany.
Friedl KH
No affiliation info available
Schmalz G
No affiliation info available
Edelmann K
No affiliation info available

MeSH

CeramicsComposite ResinsDental LeakageDental Marginal AdaptationDental PorcelainDental Restoration, PermanentDental VeneersDentin-Bonding AgentsHumansIncisorMaterials TestingMaxillaResin CementsViscosity

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

10823069

Citation

Christgau, M, et al. "Marginal Adaptation of Heat-pressed Glass-ceramic Veneers to Class 3 Composite Restorations in Vitro." Operative Dentistry, vol. 24, no. 4, 1999, pp. 233-44.
Christgau M, Friedl KH, Schmalz G, et al. Marginal adaptation of heat-pressed glass-ceramic veneers to Class 3 composite restorations in vitro. Oper Dent. 1999;24(4):233-44.
Christgau, M., Friedl, K. H., Schmalz, G., & Edelmann, K. (1999). Marginal adaptation of heat-pressed glass-ceramic veneers to Class 3 composite restorations in vitro. Operative Dentistry, 24(4), 233-44.
Christgau M, et al. Marginal Adaptation of Heat-pressed Glass-ceramic Veneers to Class 3 Composite Restorations in Vitro. Oper Dent. 1999 Jul-Aug;24(4):233-44. PubMed PMID: 10823069.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Marginal adaptation of heat-pressed glass-ceramic veneers to Class 3 composite restorations in vitro. AU - Christgau,M, AU - Friedl,K H, AU - Schmalz,G, AU - Edelmann,K, PY - 2000/5/24/pubmed PY - 2000/6/3/medline PY - 2000/5/24/entrez SP - 233 EP - 44 JF - Operative dentistry JO - Oper Dent VL - 24 IS - 4 N2 - The aim of the present in vitro study was to compare the marginal adaptation and integrity of heat-pressed glass-ceramic veneers to adjacent class 3 composite restorations and to enamel using four dual-curing composite resin cements of different viscosity with their corresponding dentin bonding agents. Thirty-six caries-free human maxillary incisors were first restored with mesial and distal class 3 composite restorations and then prepared for facial ceramic veneers. The cavity margins of the veneers were located either in the class 3 composite restorations or in the residual enamel. Heat-pressed glass-ceramic veneers (IPS Empress) were inserted adhesively using one of the following four luting systems in nine teeth: SonoCem (SC) with EBS; Variolink Ultra (VU), Variolink High-Viscosity (VHV), and Variolink Low-Viscosity (VLV) with Syntac. The veneer margins in the region of the composite restoration and in the region apical to the composite restoration (ceramic/composite resin cement interfaces, composite resin cement/composite restoration interface, and composite resin cement/enamel interface) were evaluated before and after thermo-cycling and mechanical loading (TCML) by quantitative margin analysis under a scanning electron microscope (SEM) using an image analysis system. Furthermore, microleakage was assessed in each tooth by dye penetration after TCML. For all luting systems, SEM analysis revealed excellent marginal adaptation of the ceramic veneers to the composite restorations as well as to enamel. The median percentages of marginal gap formation were 1.1% and less before TCML and 5.1% and less after TCML. The error-rates method revealed no statistical influence of the interface or of the viscosity of the luting material. Maximal values of dye penetration showed a significantly higher microleakage at veneers cemented with VU (median: 86.4%) compared to SC (median: 13.3%). In conclusion, the present data demonstrated that existing clinically acceptable class 3 composite restorations have no negative influence on the marginal adaptation of ceramic veneers. This was valid independent of the viscosity of the dual-curing composite resin cement when SC, VHV, or VLV was used. SN - 0361-7734 UR - https://www.unboundmedicine.com/medline/citation/10823069/Marginal_adaptation_of_heat_pressed_glass_ceramic_veneers_to_Class_3_composite_restorations_in_vitro_ DB - PRIME DP - Unbound Medicine ER -