12 Years of repair of amalgam and composite resins: A clinical study

J. Estay, J. Martín, V. Viera, J. Valdivieso, C. Bersezio, P. Vildosola, I. A. Mjor, M. F. Andrade, R. R. Moraes, G. Moncada, V. V. Gordan, E. Fernández

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


Objective: The objective of this study was to clinically evaluate repaired posterior amalgam and composite restorations over a 12 year period, investigate the influence of repair in the survival of restorations, and compare their behavior with respect to controls. Methods: Thirty-four patients, 18 to 80 years of age with 167 restorations, 67 composite resin (RC), and 100 amalgam (AM) restorations, participated. Restorations with localized, marginal, anatomical deficiencies and/or secondary caries, and ''clinically judged'' suitable for repair or replacement according to US Public Health Service (USPHS) criteria, were randomly assigned to four groups: repair (n=35, 20 AM, 15 RC), replacement (n=43, 21 AM, 22 RC), positive control (n=71, 49 AM, 22 RC), or negative control (n=18, 10 AM, 8 RC). The quality of the restorations was blind scored according to the modified USPHS criteria. Two examiners scored them at initial status (j=0.74) and after one to five, 10, and 12 years (j=0.88). Wilcoxon and Mann-Whitney tests provided for comparisons within the same group and between years, respectively.

Original languageEnglish
Pages (from-to)12-21
Number of pages10
JournalOperative Dentistry
Issue number1
Publication statusPublished - 1 Jan 2018

ASJC Scopus subject areas

  • General Dentistry


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