Journal article
Effect of Polishing Direction on the Marginal Adaptation of Composite Resin Restorations
Journal of esthetic and restorative dentistry, Vol.25(2), pp.125-138
04/2013
DOI: 10.1111/jerd.12020
PMID: 23617387
Abstract
Problem
Polishing composite resin restorations may lead to marginal defects and gap formation.
Purpose
To assess the effect of polishing direction on the marginal adaptation of composite resin restorations using two composite resins and two polishing systems.
Materials and Methods
Forty extracted human molars were sectioned along their mesio‐distal axis. Buccal and lingual enamel was flattened and a triangular preparation, 0.87‐mm deep and 3‐mm wide, representing two 60° bevels, was performed. Specimens were randomly assigned to eight groups (N = 20) and restored with two composite resins: a nanofilled (Filtek Supreme Ultra, 3M ESPE, St. Paul, MN, USA) or a microhybrid (Point 4, Kerr, Orange, CA, USA) and finished with two polishing techniques: polishing discs (Sof‐Lex XT, 3M ESPE) or rubber polishers (HiLuster Plus, Kerr, Bioggio, Switzerland). On each specimen, both margins were polished with the same technique, one margin from composite resin to tooth and the other from tooth to composite resin. Replicas were made for field emission scanning electron microscope observation (200×) and quantitative margin analysis was performed based on four criteria. Data were analyzed with a paired‐sample t‐test, a two‐sample t‐test, and one‐way analysis of variance or their nonparametric analog.
Results
Significant differences were found in most groups between polishing directions with better marginal adaptation from composite resin to tooth than from tooth to composite resin. Differences between composite resins and polishing techniques seemed to be dependent on certain combinations of composite resin, polishing technique, and polishing direction.
Conclusion
Polishing from composite resin to tooth leads to better marginal adaptation than polishing from tooth to composite resin.
Clinical Significance
The results obtained from this in vitro study suggest that polishing direction influences the marginal adaptation of composite resins and that polishing from composite resin to tooth structure should be clinically performed whenever possible on accessible margins to preserve marginal integrity and esthetics.
Details
- Title: Subtitle
- Effect of Polishing Direction on the Marginal Adaptation of Composite Resin Restorations
- Creators
- Laurie St‐Pierre - Université LavalCathia Bergeron - Université LavalFang Qian - University of IowaMaria Marcela Hernández - University of IowaJustine L Kolker - University of IowaDeborah S Cobb - University of IowaMarcos A Vargas - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of esthetic and restorative dentistry, Vol.25(2), pp.125-138
- DOI
- 10.1111/jerd.12020
- PMID
- 23617387
- ISSN
- 1496-4155
- eISSN
- 1708-8240
- Number of pages
- 14
- Language
- English
- Date published
- 04/2013
- Academic Unit
- Preventive and Community Dentistry; Operative Dentistry; Family Dentistry; Dental Research
- Record Identifier
- 9984065702302771
Metrics
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