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Marginal Adaptation and Color Stability of Four Provisional Materials

2007; Wiley; Volume: 17; Issue: 2 Linguagem: Inglês

10.1111/j.1532-849x.2007.00256.x

1532-849X

Edward J. Givens, Gisele F. Neiva, Peter Yaman, Joseph B. Dennison,

Temporomandibular Joint Disorders

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 × 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 10× magnification and recorded. For color stability, 10‐mm diameter × 2‐mm thick discs (n = 10 × 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. ΔE 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 μm, p < 0.05) when compared to the other provisional materials. A significant color change (ΔE = 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.