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Four-year clinical evaluation of a self-adhesive luting agent for ceramic inlays.

Abstract

OBJECTIVES
The aim of this randomized controlled clinical trial was to evaluate the 4-year clinical performance of a self-adhesive resin cement, RelyX Unicem (3M ESPE), used for cementation of ceramic inlays. In addition, the influence of selectively acid-etching enamel prior to luting on the clinical performance of the restorations was assessed.
METHODS
Sixty-two IPS Empress 2 inlays/onlays were placed in 31 patients by two experienced clinicians. The restorations were luted with RelyX Unicem with (=experimental group: E) or without (=control group: NE) prior enamel etching with phosphoric acid. At baseline, 6 months, and 1, 2, and 4 years after placement, the restorations were assessed by two calibrated investigators using modified USPHS criteria. Ten selected samples of each group were investigated under SEM regarding morphological changes at the cement-inlay interface.
RESULTS
The recall rate at 4 years was 97%. Two restorations (1 E, 1 NE) were lost, and one (E) had to be replaced due to inlay and tooth fracture resulting in a survival rate of 95%. No significant differences between the experimental and control group were noticed regarding all criteria (McNemar, p < 0.05). An obvious deterioration in marginal integrity was observed after 4 years as only 5% (E = 7%; NE = 3%) of the restorations exhibited an excellent marginal adaptation. In 90% of the restorations small, still clinically acceptable marginal deficiencies were observed. SEM of the luting gap showed an increased wear of the RelyX Unicem cement over the 4-year period.
CONCLUSIONS
The self-adhesive luting cement RelyX Unicem can be recommended for bonding of ceramic inlays/onlays. Additional selective enamel etching does not improve the clinical performance of the restorations within the 4-year period.
CLINICAL RELEVANCE
The self-adhesive resin composite RelyX Unicem showed acceptable clinical performance after 4 years of clinical service.

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  • Publisher Full Text
  • Authors

    Peumans M, Voet M, De Munck J, Van Landuyt K, Van Ende A, Van Meerbeek B

    Source

    Clinical oral investigations 17:3 2013 Apr pg 739-50

    MeSH

    Acid Etching, Dental
    Adolescent
    Adult
    Cementation
    Dental Cements
    Dental Marginal Adaptation
    Dental Porcelain
    Dental Prosthesis Retention
    Dentin-Bonding Agents
    Female
    Humans
    Inlays
    Kaplan-Meier Estimate
    Male
    Microscopy, Electron, Scanning
    Middle Aged
    Statistics, Nonparametric
    Young Adult

    Pub Type(s)

    Journal Article
    Randomized Controlled Trial
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    22707232