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A 6-year clinical evaluation of Class I poly-acid modified resin composite/resin composite laminate restorations cured with a two-step curing technique.
Umeå University, Faculty of Medicine, Odontology, Dental Hygiene.
2003 (English)In: Dental Materials, ISSN 0109-5641, Vol. 19, no 5, 423-428 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: Polymerization shrinkage is still one of the main disadvantages of resin composite restorations (RC). Especially in cavities with a high C-factor, debonding can occur. A laminate restoration including a base with a more elastic behavior might result in a better adaptation. The purpose of this study was to evaluate the durability of a combination of two techniques suggested to counter the stress formation in direct RC restorations in cavities with the highest C-factor. METHODS: Each of the 29 patients received one or two pair(s) of Class I restorations. The first restoration was a poly-acid modified resin composite/resin composite (PMRC/RC) sandwich restoration and the second a direct RC restoration. Both restorations, except for the PMRC layer, were placed with oblique layering and two-step curing technique. Ninety restorations, 23 premolar and 67 molars, were evaluated annually with slightly modified USPHS criteria during 6 years. RESULTS: At 6 years, 41 pairs were evaluated. A cumulative failure rate of 2.4% was observed for both the RC and the laminate restorations. One laminate restoration showed non-acceptable color match, but was not replaced and one RC restoration showed non-acceptable marginal adaptation. Two cases of slight postoperative sensitivity were observed in one patient. Three restorations were partially replaced due to primary proximal caries. SIGNIFICANCE: A high durability for and no differences, were observed between both restorative techniques in Class I cavities.

Place, publisher, year, edition, pages
2003. Vol. 19, no 5, 423-428 p.
URN: urn:nbn:se:umu:diva-17660DOI: 10.1016/S0109-5641(02)00086-6PubMedID: 12742438OAI: diva2:157333
Available from: 2007-11-15 Created: 2007-11-15 Last updated: 2009-10-06Bibliographically approved

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van Dijken, Jan
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