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Effect of the amount of thickness reduction on color and translucency of dental monolithic zirconia ceramics
The Journal of Advanced Prosthodontics ; : 37-42, 2016.
Article in English | WPRIM | ID: wpr-211468
ABSTRACT

PURPOSE:

This study investigated the effect of amount of thickness reduction on color and translucency of dental monolithic zirconia ceramics. MATERIALS AND

METHODS:

One-hundred sixty-five monolithic zirconia specimens (16.3 mm x 16.3 mm x 2.0 mm) were divided into 5 groups (Group I to V) according to the number of A2-coloring liquid applications. Each group was then divided into 11 subgroups by reducing the thickness up to 1.0 mm in 0.1-mm increments (Subgroup 0 to 10, n=3). Colors and spectral distributions were measured according to CIELAB on a reflection spectrophotometer. All measurements were performed on five different areas of each specimen. Color difference (DeltaE*(ab)) and translucency parameter (TP) were calculated. Data were analyzed using one-way ANOVA and multiple comparison Scheffe test (alpha=.05).

RESULTS:

There were significant differences in CIE L* between Subgroup 0 and other subgroups in all groups. CIE a* increased (0.523.7) were obtained between Subgroup 0 and other subgroups. TP values generally increased as the thickness reduction increased in all groups (R2>0.89, P<.001).

CONCLUSION:

Increasing thickness reduction reduces lightness and increases a reddish, bluish appearance, and translucency of monolithic zirconia ceramics.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Ceramics / Prosthesis Coloring Language: English Journal: The Journal of Advanced Prosthodontics Year: 2016 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Ceramics / Prosthesis Coloring Language: English Journal: The Journal of Advanced Prosthodontics Year: 2016 Type: Article