Effect of plasma arc curing on the microleakage of Class V resin-based composite restorations

William W. Brackett, Larry D. Haisch, David A. Covey

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Purpose: To evaluate the effect of plasma arc light-curing on the microleakage of Class V resin-based composite (RBC). Materials and Methods: Facial and lingual Class V cavities were prepared at the cemento-enamel junction of extracted third molars. Restorations of the two materials (Z250; Amelogen) were placed, using the supplied dentin adhesives (Single Bond; PQ1, respectively), and light-cured by either a halogen light curing unit (H) or a plasma arc curing unit (P). After thermal cycling, the teeth were immersed in methylene blue dye, then sections of the restored teeth were visually assessed for leakage. Results: No leakage was observed at the interface between enamel and RBC in any restoration in this study. At gingival margins, the incidence of leakage (slight/severe) was: Z250 H = 2/4, P = 6/6; Amelogen H = 3/4, P = 1/12, where n = 16. The greatest incidence of leakage was observed in restorations cured by the plasma arc method. A two-way ANOVA of leakage data rankings showed curing method to be a significant factor (P = 0.002), restorative material not to be a significant factor (P = 0.24), and no significant interaction between material and curing method (P = 0.38).

Original languageEnglish (US)
Pages (from-to)121-122
Number of pages2
JournalAmerican journal of dentistry
Issue number3
StatePublished - Jun 2000

ASJC Scopus subject areas

  • General Dentistry


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