Marginal adaptation and color stability of four provisional materials

J Prosthodont. 2008 Feb;17(2):97-101. doi: 10.1111/j.1532-849X.2007.00256.x. Epub 2007 Oct 30.

Abstract

Purpose: A number of provisional restorative materials exist on the market. This study tested marginal fit and color stability of three provisional restorative materials and a control.

Materials and methods: Two auto-cure materials, Protemp Garant and Integrity, and one dual-cure material, Luxatemp Solar, were tested against SNAP, a polyethyl methacrylate control. A maxillary right central incisor ivorine tooth was prepared for a full coverage all-ceramic crown, with a 1.5-mm chamfer margin. Four points were engraved at a point 1 mm below the facial, lingual, mesial, and distal margins, and replicas (n = 40) were produced by the manufacturer. Provisional crowns (n = 10 x 4) were fabricated on the individual replicas using a polyethylene coping template. The crowns were trimmed under magnification using an acrylic bur. The distance from the crown margins to a point tangent to the engraved markings was measured under 10x magnification and recorded. For color stability, 10-mm diameter x 2-mm thick discs (n = 10 x 4) were fabricated and immersed cyclically in tea for 1 week in a Tucillo/Nielson apparatus. Color measurements were recorded for each specimen at baseline and after staining. DeltaE values were calculated to determine the extent of the color change.

Results: The means of the four marginal discrepancy measurements for each specimen were analyzed using a 1-way ANOVA and Tukey post-hoc comparison. Luxatemp Solar had statistically significant marginal discrepancy (319 microm, p < 0.05) when compared to the other provisional materials. A significant color change (DeltaE = 4.33, p < 0.05) was found for Protemp Garant.

Conclusion: The dual-cure temporary material (Luxatemp Solar) exhibited significantly more discrepancy at the margin than the auto-cure bis-acryl materials or acrylic control. Protemp Garant exhibited a clinically noticeable change in shade after 1 week in staining solution, whereas the other materials did not exhibit a clinically noticeable change.

Clinical implications: Provisional crowns fabricated from SNAP, Protemp Garant, and Integrity exhibited similarly low marginal discrepancy. SNAP, Luxatemp Solar, and Integrity did not demonstrate a clinically detectable change in shade after 1 week in a staining solution.

Publication types

  • Comparative Study

MeSH terms

  • Acrylic Resins / chemistry
  • Bisphenol A-Glycidyl Methacrylate / chemistry
  • Color
  • Colorimetry
  • Composite Resins / chemistry
  • Crowns*
  • Dental Marginal Adaptation*
  • Dental Materials / chemistry*
  • Dental Prosthesis Design
  • Dental Restoration, Temporary / methods*
  • Humans
  • Incisor
  • Materials Testing
  • Methylmethacrylates / chemistry
  • Polymethacrylic Acids / chemistry
  • Surface Properties
  • Tea
  • Tooth Preparation, Prosthodontic

Substances

  • Acrylic Resins
  • Composite Resins
  • Dental Materials
  • Methylmethacrylates
  • Polymethacrylic Acids
  • Tea
  • integrity resin
  • luxatemp
  • vinyl ethyl methacrylate
  • Bisphenol A-Glycidyl Methacrylate
  • poly(ethylmethacrylate)
  • Protemp