The Influence of a Flexible Model on the Marginal Adaptation of Inlay Composite Restorations: A MicroCT Analysis

M. V. Villanueva, G. D.S. Balbinot, G. H. Mogollon, V. C.B. Leitune, F. M. Collares

Research output: Contribution to journalArticlepeer-review


The aim of this study was to evaluate the influence of flexible models on the marginal adaptation of indirect resin composite restorations. Thirty-six cavity preparations were made for class II restorations in permanent molar teeth. Three groups (n=12) were defined following three impressions/model material combinations: G(STONE), polyvinylsiloxane, and type IV stone model, as a control group; G(IMPRESSIONPVS), alginate and flexible polyvinylsiloxane; G(MODELPVS), alginate and flexible polyvinylsiloxane for models. All restorations were positioned on their respective teeth and evaluated by micro-computed tomography. Absolute marginal discrepancies were measured digitally (ImageJ). The results were compared using one-way ANOVA (p⟨ 0.05). The mean ± SD absolute marginal discrepancy of indirect resin composite restorations made from flexible and rigid stone models was as follows: G(STONE), 206 (±79.95) μm; G(IMPRESSIONPVS), 221.50 (±61.73) μm; G(MODELPVS), 203.25 (±65.93) μm. Absolute marginal discrepancies were not significantly influenced by the flexible and rigid stone models (p=0.78). The flexible or rigid stone model did not influence the marginal adaptation of the indirect resin composite restorations.

Original languageEnglish
Pages (from-to)200-206
Number of pages7
JournalThe European journal of prosthodontics and restorative dentistry
Issue number3
StatePublished - 30 Aug 2022
Externally publishedYes


  • Composite Resins
  • Dental Impression Materials
  • Dental Marginal Adaptation
  • Dental Models
  • Silicone Elastomers
  • X-Ray Microtomography


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