Chemical surface modification of lithium disilicate needles of a silica-based ceramic after HF-etching and ultrasonic bath cleaning: impact on the chemical bonding with silane

Angeline Poulon-Quintin (1) , François Rouzé L’alzit (1) , Emma Ogden (1) , Axel Large (2, 1) , Caroline Bertrand (2, 1) , Michel Bartala (2)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 UFR d’Odontologie

Recommendations to obtain the best bonding to silica-based ceramics are to prepare its surface by hydrofluoric-acid HF etching and regular application of a silane. This study investigated how the HF-etching followed by ultrasonic water bath cleaning or by an additional phosphoric acid treatment impacts the adhesion properties of a resin (G-CEM LinkForce®) with a lithium disilicate glass-ceramic (IPS Emax Press, Ivoclar Vivadent). Comparison is based on results obtained with HF etching and direct silane application. After HF-etching, a water ultrasonic bath (4 minutes), and a final air drying, the scratch test critical load increases (+ 46%) thanks to chemical bonding. Additional tests are presented including heat treatments (at 85 °C before and after silanization). If HF-etching is followed by phosphoric acid treatment and drying of silane at 85 °C, scratch test critical load increases (+ 42%) due to mechanical bonding. Similar adhesion properties are obtained with two opposite protocols.

Domaines: Matériaux; Biomatériaux

Angeline Poulon-Quintin, François Rouzé L’alzit, Emma Ogden, Axel Large, Caroline Bertrand, et al.. Chemical surface modification of lithium disilicate needles of a silica-based ceramic after HF-etching and ultrasonic bath cleaning: impact on the chemical bonding with silane. Journal of Dental Problems and Solutions, 2022, 9 (2), pp.035-041. ⟨10.17352/2394-8418.000115⟩. ⟨hal-03956475⟩