Influence of polishing systems on roughness and color change of two dental ceramics
Maciel Lucas Campagnaro, Silva Carlos Frederico Bettcher, de Jesus Ricardo Huver, da Silva Concilio Lais Regiane, Kano Stefania Carvalho, Xible Anuar Antonio,
소속 상세정보
( Maciel Lucas Campagnaro ) - University of Taubate Dental School
( Silva Carlos Frederico Bettcher ) - School of Higher Education of Sao Francisco de Assis Dental School
( de Jesus Ricardo Huver ) - University Veiga de Almeida Dental School
( da Silva Concilio Lais Regiane ) - University of Taubate Dental School
( Kano Stefania Carvalho ) - Federal University of Espirito Santo Dental School
( Xible Anuar Antonio ) - Federal University of Espirito Santo Dental School
Abstract
PURPOSE: To evaluate the polishing effect on roughness and color change of pressed and layering ceramics after immersion in coffee solution.
MATERIALS AND METHODS: 88 ceramic discs (1.0 mm × 10.0 mm) were manufactured - 44 nano-fluorapatite layering ceramics (IPS e.max Ceram. Group C) and 44 pressed lithium disilicate ceramic discs (IPS e. max Press - Group P). Each group was divided into 4 subgroups according to surface treatments: (G) Glaze, (S) Shofu polishing system (Shofu Inc.), (E) Edenta AG polishing System, (KG) 30-μm diamond granulation tip. Surface roughness (Ra) and color change (ΔE) measurings after the surface treatments were performed, before and 12 days after the immersion in coffee solution. A samples' qualitative analysis was conducted with a scanning electron microscopy (SEM). Data were statistically-treated with one-way-ANOVA and Duncan's tests, apart from paired t-test and Pearson's correlation test (α=5%).
RESULTS: The decrescent order, both for surface roughness (Ra) and ΔE for both ceramics were: KG > E > S > G (P<.05). With exception for PG and CG subgroups, which did not present statistical difference between them, all other pressed ceramics subgroups presented smaller Ra values and greater ΔE values than the layering ceramics subgroups (P<.05).
CONCLUSION: Although mechanical polishing systems presented intermediate Ra values, their colors were considered clinically acceptable. There is a strong correlation between the surface roughness and the color change of tested ceramics.
키워드
Ceramics; Pigmentation; Spectrophotometry; Dental restoration; Surface roughness
원문 및 링크아웃 정보
등재저널 정보