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Optical properties of a novel glass-ceramic restorative material.
Blackburn, Jackson; Jackson, Tate; Cook, Ryan; Sulaiman, Taiseer A.
Afiliação
  • Blackburn J; Division of Comprehensive Oral Health, University of North Carolina, Adams School of Dentistry, Chapel Hill, North Carolina, USA.
  • Jackson T; Graduate Orthodontics Program, Division of Craniofacial and Surgical Care, University of North Carolina, Adams School of Dentistry, Chapel Hill, North Carolina, USA.
  • Cook R; Graduate Prosthodontics Program, Division of Comprehensive Oral Health, University of North Carolina, Adams School of Dentistry, Chapel Hill, North Carolina, USA.
  • Sulaiman TA; Division of Comprehensive Oral Health, University of North Carolina, Adams School of Dentistry, Chapel Hill, North Carolina, USA.
J Esthet Restor Dent ; 33(8): 1160-1165, 2021 12.
Article em En | MEDLINE | ID: mdl-34365726
ABSTRACT

OBJECTIVE:

To examine the optical properties of a dental restorative material manufactured from lithium aluminosilicate ceramic and reinforced with lithium disilicate. Translucency and the optical effects of various supporting materials on color were the primary focus.

METHODS:

Five 10 × 10 mm samples were prepared in thicknesses of 0.5, 1.0, 1.5, and 2.0 mm of both high translucency (HT) and low translucency (LT) versions of the material in shade A3. A spectrophotometer was used to measure the illuminance of the samples with black and white backings in order to calculate contrast ratio (CR) and relative translucency parameter (RTP). A baseline relationship between translucency and material thickness was examined and the effects of composite, titanium, and zirconia abutments on color change were studied.

RESULTS:

No significant findings were identified for RTP or CR between the HT and LT material, regardless of the material thickness (p = 0.39, p = 0.14, respectively). Regardless of material thickness (HT vs. LT), translucencies (RTP and CR) were significantly different with composite, titanium, and zirconia backings compared to baseline values (p < 0.0001). Titanium had the most significant decrease in translucency compared to composite and zirconia. There was no difference in ΔE00 between the HT and LT materials (p > 0.05) regardless of the backing. Titanium had the most significant effect on color of both materials followed by composite then zirconia (p < 0.0001).

CONCLUSIONS:

There is not a clinically significant difference in translucency between the high translucency and low translucency materials. Only zirconia supporting structures produced changes in color that are clinically acceptable. CLINICAL

SIGNIFICANCE:

Understanding the optical properties of glass-ceramic restorative materials aids providers in selecting appropriate materials for optimum esthetic outcomes. The lithium-aluminosilicate reinforced with lithium disilicate material does a poor job masking supporting structures and resisting color change.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cerâmica / Desenho Assistido por Computador Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cerâmica / Desenho Assistido por Computador Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2021 Tipo de documento: Article