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

Fernanda A. Feitosa, Rodrigo M. De Araújo, Franklin R. Tay, Lina Niu, César R. Pucci

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish (US)
Article number17422
JournalScientific Reports
Volume7
Issue number1
DOIs
StatePublished - Dec 1 2017

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Resin Cements
Graphite
Solid-State Lasers
Ceramics
Lasers
Hydrofluoric Acid
Tensile Strength
Clinical Protocols
Electron Scanning Microscopy
lithia disilicate
Therapeutics

ASJC Scopus subject areas

  • General

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Effect of high-power-laser with and without graphite coating on bonding of resin cement to lithium disilicate ceramic. / Feitosa, Fernanda A.; De Araújo, Rodrigo M.; Tay, Franklin R.; Niu, Lina; Pucci, César R.

In: Scientific Reports, Vol. 7, No. 1, 17422, 01.12.2017.

Research output: Contribution to journalArticle

Feitosa, Fernanda A. ; De Araújo, Rodrigo M. ; Tay, Franklin R. ; Niu, Lina ; Pucci, César R. / Effect of high-power-laser with and without graphite coating on bonding of resin cement to lithium disilicate ceramic. In: Scientific Reports. 2017 ; Vol. 7, No. 1.
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