The Effect of Different Enamel Substrates on Color Change of Glass Ceramic Laminate Veneers

Document Type : Original Article

Authors

1 Fixed Prosthodontics Department, Faculty of Dentistry,Tanta University,

2 Restorative dentistry department ,Faculty of dentistry,Tanta university,Egypt.

3 Department of Fixed Prosthodontics, College of Dentistry, Tanta University

Abstract

Background: The purpose of this study was to evaluate how the color of glass ceramic laminate veneers was affected by various enamel substrates, including sound enamel, demineralized enamel, demineralized enamel treated with ICON resin infiltration, and demineralized enamel treated with Oli Nano seal.
Methods: 40 longitudinal labial halves of maxillary central incisor crowns, embedded in acrylic blocks. labial surfaces of all specimens that facing upward underwent initial preparation process through creation of 1 mm depth -orientation grooves , then randomly divided into four equal groups: n=10 G1: Laminate veneer bonded to sound enamel (control group),G2: Laminate veneer bonded to demineralized enamel, G3: Laminate veneer bonded to demineralized enamel treated with ICON resin infiltration,G4: Laminate veneer bonded to demineralized enamel treated with Oli Nano seal . Ceramic bars were prepared and base line color recordings using spectrophotometer then cementation of the ceramic bars to the working field of all groups, thermocycling and post operative color assessment. The data were analyzed using One way ANOVA and Multiple comparison Tuckey test .
Results: The least color change value (Δ E) presented in group III followed by group IV, while the highest (Δ E) value recorded in group II with a significant difference between group III (P-value 0.009*).
Conclusion: within the limitation of this in-vitro study Laminate veneers which bonded to demineralized enamel treated with ICON resin infiltration showed less color changes in comparison to those treated with Oli Nano seal or with demineralized enamel only.

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Egyptian Dental Journal
Volume 71, Issue 3 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
July 2025
Pages 2269-2279

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