Comparison of Optical Properties of Laminate Veneers Made of Zolid FX and Katana UTML Zirconia and Lithium Disilicate Ceramics

Abstract

Objectives: This study aimed to compare the optical properties of Zolid FX, Katana UTML, and lithium disilicate laminate veneers.
 Materials and Methods: In this in-vitro experimental study, the maxillary left lateral incisor of a phantom received a laminate veneer preparation. An impression was made, and a die was fabricated using dental stone. The die was scanned using a computer-aided design/computer-aided manufacturing scanner. Ten dies were fabricated from each of the A1, A2, and A3 shades of composite resin. Laminate veneers were fabricated using A1 shade of Katana UTML, Zolid FX, and IPS e.max CAD ceramics (n=10) and placed on composite abutments using bleach and white colors of trial insertion paste (TIP). The optical properties were measured at the incisal, middle, and cervical thirds using a spectrophotometer. Data were analyzed using three-way analysis of variance and Tukey’s test.
 Results: The effect of laminate material on the L*, a*, and b* parameters was significant in all areas (P<0.001), except for the L* parameter in the middle and cervical thirds. All color parameters were affected by TIP color in all three regions in most samples (P<0.05). The effect of composite abutment shade was also significant in most cases (P<0.05). The effect of laminate material, abutment shade, and TIP color on the b* parameter was significant (P<0.001). The L* parameter was almost the same in the two zirconia and lithium disilicate ceramic groups.
 Conclusion: The composite abutment shade, TIP color, and laminate material should be carefully selected to achieve optimal aesthetics in laminate veneers.

Effect of ceramic and resin cement type on color stability and translucency of ceramic laminate veneers for diastema closure: an in vitro study

“…In the current study, identical resin abutments with uniform facial reduction were used because they allow easy standardization of the color, size, and shape of the abutments 52 , 53 . Although natural teeth are more representative of clinical conditions during in vitro testing, they are much more difficult to use due to its variations in color, size, and shape, making it difficult to standardize the experiment.…”

Color stability and translucency of ceramic laminate veneer restoration for diastema closure: Effect of laminate veneering materials and resin cements

“…1 In the current study, resin teeth were used because they allow easy standardization of the color, size, and shape of the abutments. 58,59 Although natural teeth are more representative of clinical conditions during in vitro testing, they are much more di cult to use due to its variations in color, size, and shape, making it di cult to standardize the experiment. Additionally, collecting sound extracted human teeth of comparable size, shape, and color requires signi cant time and raises ethical concerns.…”

Zircônia ultra translúcida: Revisão de literatura

“…A translucidez é uma das propriedades que confere a restauração um efeito natural mais próximo ao da estrutura dentária 26 , sendo uma propriedade óptica muito relevante na escolha de um material cerâmico e sua aplicação clínica quando a estética é requerida5. Um dos grandes problemas das reabilitações orais é conseguir mascarar os diferentes tipos de substratos, tais como dentes clareados e escurecidos, núcleos metálicos fundidos e pilares de implantes.…”

“…A translucidez é uma propriedade inerente à zircônia ultra translúcida, comprovada por estudos recentes 5,14,18,19 . No entanto, poucos artigos se propuseram a avaliar a capacidade de mascaramento 24,26 e estabilidade de cor da zircônia ultra translúcida 27 . Os trabalhos utilizam metodologias distintas e adotam valores diferentes de ΔE* como sendo clinicamente perceptíveis, o que dificulta a comparação entre os estudos.…”