Impact of simulated toothbrushing on surface properties of chairside CAD-CAM materials: An in vitro study

Autor(es)

de Andrade, Guilherme Schmitt ^[1] ; Augusto, Marina Gullo ^{[2, 3]} ; Simoes, Beatriz Venturoso ^[2] ; Pagani, Clovis ^[2] ; Anzaloni Saavedra, Guilherme de Siqueira Ferreira ^[1] ; Bresciani, Eduardo ^[2]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ Unesp, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Inst Sci & Technol, Dept Restorat Dent, Av Eng Francisco Jose Longo 777Jd, BR-12245000 Sao Jose Dos Campos, SP - Brazil

^[3] Sao Francisco Univ USF, Sch Dent, Braganca Paulista, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PROSTHETIC DENTISTRY; v. 125, n. 3 MAR 2021.
• Citações Web of Science: 0

Resumo

Statement of problem. Chairside computer-aided design and computer-aided manufacturing (CAD-CAM) materials that do not require any firing steps are a promising option to expedite restoration production; however, little information is available to determine the most suitable material for each clinical situation. Purpose. The purpose of this in vitro study was to evaluate the effect of simulated toothbrushing on surface gloss, roughness, and wear of chairside CAD-CAM materials. Material and methods. Disk-shaped specimens (n=15) were prepared of the following materials: ENA-VITA Enamic; LAV-Lava Ultimate; EMP-IPS Empress CAD; CER-Cerasmart; GRA-Grandio blocs. Gloss (Gloss Unit-GU) and surface roughness (Ra-mm) were evaluated before and after simulated toothbrushing (100000 strokes). Wear (mm) was assessed by contact profilometry. Additional analyses of microhardness by scanning electron microscopy were also performed. Data were analyzed with 2-way repeated measures ANOVA test for roughness and gloss, and 1-way ANOVA for wear (alpha=.05). To estimate the correlation between Ra and GU, the Pearson correlation was calculated. Results. Before brushing, CER showed the lowest Ra (P<.001), and GRA the lowest GU values. After brushing, the feldspathic ceramic-based materials (ENA and EMP) presented the highest gloss, whereas the ceramic group (EMP) showed the lowest Ra. Before and after brushing, GRA showed the lowest GU values. Higher wear values were found for the composite resin groups (CER>GRA), with the exception of LAVA, which was similar to ENA, and EMP showing improved wear resistance. A strong negative correlation (-0.925) between GU and Ra values was detected (P<.001). Conclusions. The materials containing a glass phase (ENA and EMP) presented higher wear resistance, higher gloss, and lower roughness after brushing than the other materials tested. The correlation test showed that the higher the surface roughness, the lower the gloss. (AU)

• Processo FAPESP: 17/25849-0 - Efeito da escovação sobre o brilho, rugosidade e desgaste de materiais chairside para CAD/CAM
• Beneficiário: Beatriz Venturoso Simões
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica