Effect of high-power-laser with and without graphite coating on bonding of resin cement to lithium disilicate ceramic

Autor(es)

Feitosa, Fernanda A. ^[1] ; de Araujo, Rodrigo M. ^[2] ; Tay, Franklin R. ^[3] ; Niu, Lina ^{[4, 5, 6]} ; Pucci, Cesar R. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP Sao Jose Campos, Inst Sci & Technol, Dept Restorat Dent, Sao Paulo - Brazil

^[2] Sao Paulo State Univ UNESP Sao Jose Campos, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Sao Paulo - Brazil

^[3] Augusta Univ, Dent Coll Georgia, Augusta, GA - USA

^[4] Fourth Mil Med Univ, Sch Stomatol, State Key Lab Mil Stomatol, Xian, Shaanxi - Peoples R China

^[5] Fourth Mil Med Univ, Sch Stomatol, Natl Clin Res Ctr Oral Dis, Xian, Shaanxi - Peoples R China

^[6] Fourth Mil Med Univ, Sch Stomatol, Dept Prosthodont, Shaanxi Key Lab Oral Dis, Xian, Shaanxi - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 7, DEC 12 2017.
• Citações Web of Science: 1

Resumo

The present study evaluated the effect of different high-power-laser surface treatments on the bond strength between resin cement and disilicate ceramic. Lithium disilicate ceramic specimens with truncated cones shape were prepared and divided into 5 groups: HF (hydrofluoric acid-etching), Er: YAG laser + HF, Graphite + Er: YAG laser + HF, Nd: YAG laser + HF, and Graphite + Nd: YAG laser + HF. The treated ceramic surfaces were characterized with scanning electron microscopy and surface roughness measurement. Hourglasses-shaped ceramic-resin bond specimens were prepared, thermomechanically cycled and stressed to failure under tension. The results showed that for both the factors ``laser{''} and ``graphite{''}, statistically significant differences were observed (p < 0.05). Multiple-comparison tests performed on the ``laser{''} factor were in the order: Er: YAG > Nd: YAG (p < 0.05), and on the ``graphite{''} factor were in the order: graphite coating < without coating (p < 0.05). The Dunnett test showed that Er: YAG + HF had significantly higher tensile strength (p = 0.00). Higher surface roughness was achieved after Er: YAG laser treatment. Thus Er: YAG laser treatment produces higher bond strength to resin cement than other surface treatment protocols. Surface-coating with graphite does not improve bonding of the laser-treated lithium disilicate ceramic to resin cement. (AU)

• Processo FAPESP: 13/02953-5 - Avaliação da resistência de união utilizando diferentes tratamentos superficiais em cerâmica IPS e-max press empregando laser de alta potência
• Beneficiário: César Rogerio Pucci
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/08443-6 - Avaliação da resistência de união utilizando diferentes tratamentos superficiais em cerâmica IPS e-max press empregando laser de alta potência
• Beneficiário: Fernanda Alves Feitosa
• Modalidade de apoio: Bolsas no Brasil - Mestrado