Sealing of restorations with marginal defects does not affect their longevity

Juan Estay Larenas, Javier Martin Casielles, Patricio Vildósola Grez, Claudia M. Villablanca, Ivar A. Mjör, Osmir Batista Oliveira, Mark Laske, Bas A. Loomans, Marcelo Ferrarezi De Andrade, Gustavo Moncada Cortés, Valeria V. Gordan, Niek J.M. Opdam, Eduardo Fernández

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Purpose: To evaluate sealed amalgam and resin-based composite restorations after 12 years to determine whether sealing minor defects (micro-repairs) enhanced the longevity of restorations. Methods: 34 subjects aged 18-80 were recruited. This sample group underwent 137 restorations, including 51 resin-based composite (RC) and 86 amalgam (AM) restorations. Existing restorations with localized, marginal defects were assigned to one of two groups: (a) the Sealing group (n=48, 27 AM; 21 RC) or (b) the Control group (n=89, 59 AM; 30 RC). The quality of each restoration was scored according to the modified USPHS criteria by two examiners at the beginning of the study and after 1-5, 10, and 12 years. Kaplan Meier survival curves were created and a Cox regression was applied to investigate survival variables. Mantel Cox, Wilcoxon, and Friedman tests were performed for comparisons within groups. Results: After 12 years, no statistically significant differences were observed for the variables "restorative material" (P= 0.538) or "sealing yes/no" (P= 0.136) with respect to the longevity of the restorations. AH groups behaved similarly with regard to marginal adaptation, secondary caries, and tooth sensitivity (P> 0.05). Cumulatively, after a 12-year observation period, sealing minor restoration defects did not affect the longevity of the restorations.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalAmerican Journal of Dentistry
Issue number2
Publication statusPublished - 1 Apr 2018

ASJC Scopus subject areas

  • Dentistry(all)


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