Microleakage of extended and nonextended class I composite resin and sealant restorations

Penning, C; Amerongen, J.P. van

doi:10.1016/0022-3913(90)90166-a

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…There is somewhat less microleakage associated with composite inlays that have been post-cured with heat and light (Wendt, 1991;Shortall et a/., 1989;Biederman, 1989), but even with inlays, and despite the introduction of adhesion systems that strongly bond composites to dentin and enamel simultaneously, the problems associated with marginal gaps have not been completely solved (Cheung, 1990). Microleakage can be diminished in composite restorations by a number of techniques, most notably the use of glass-ceramic inserts, or "megafillers" (Donly et ai, 1989), and by the application of unfilled resin to the margins of the restoration Penning and van Amerongen, 1990). …”

Section: Marginal Leakagementioning

confidence: 97%

Dental Composites/Glass Ionomers: the Materials

Bowen

Marjenhoff

1992

Adv Dent Res.

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Most commercial dental composites contain liquid dimethacrylate monomers (including BIS-GMA or variations of it) and silica-containing compositions as inorganic reinforcing filler particles coated with methacrylate-functional silane coupling agents to bond the resin to the filler. They also contain initiators, accelerators, photo-initiators, photosensitizers, polymerization inhibitors, and UV absorbers. Durability is a major problem with posterior composites. The typical life-span of posterior composites is from three to 10 years, with large fillings usually fewer than five years. Polymerization shrinkage and inadequate adhesion to cavity walls are remaining problems. Some pulp irritation can occur if deep restorations are not placed over a protective film. Some have advocated the use of glass-ionomer cement as a lining under resin composite restorations in dentin. The concept of glass-ionomer cements (GICs) was introduced to the dental profession in the early 1970's. Current GICs may contain poly(acrylic acid) or a copolymer. Higher-molecular-weight copolymers may also be used to improve the physical properties of some GICs. Stronger and less-brittle hybrid materials have been produced by the addition of water-soluble compatible polymers to form light-curing GIC formulations. The ion-leachable aluminosilicate glass powder, in an aqueous solution of a polymer or copolymer of acrylic acid, is attacked by the hydrated protons of the acid, causing the release of aluminum and calcium ions. Salt bridges are formed, and a gel matrix surrounds the unreacted glass particles. The matrix is adhesive to mineralized tissues. Provisions must be made for maintenance of the water balance of restorations for the first 24 hours.(ABSTRACT TRUNCATED AT 250 WORDS)

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Section: Marginal Leakagementioning

confidence: 97%

Dental Composites/Glass Ionomers: the Materials

Bowen

Marjenhoff

1992

Adv Dent Res.

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Dental materials: 1990 literature review

Noort

Brown

Causton

et al. 1991

Journal of Dentistry

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Adaptation and radiographic evaluation of four adhesive systems

Opdam¹,

Roeters²,

Verdonschot³

1997

Journal of Dentistry

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Objectives: The purpose of this study was to compare micro leak age, gap formation, thickness of the adhesive layer and its radiographic appearance associated with four adhesive restorative procedures for class 1 cavities. Methods: Adhesive systems with easy handling characteristics were selected for the restoration of class I cavities in extracted third molars. Bite wing radiographs were taken of each tooth and four observers were asked to assess the presence of the adhesive layer. Microleakage, gap width and the thickness of the adhesive layer of each restoration were measured upon sectioning of the teeth.

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Microleakage of extended and nonextended class I composite resin and sealant restorations

Cited by 3 publications

References 3 publications

Dental Composites/Glass Ionomers: the Materials

Dental Composites/Glass Ionomers: the Materials

Dental materials: 1990 literature review

Adaptation and radiographic evaluation of four adhesive systems

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