Luting indirect restorations with resin cements versus composite resins: Effects of preheating and ultrasound energy on film thickness

• Published in: Journal of esthetic and restorative dentistry 2022-06, Vol.34 (4), p.641-649
• Main Authors: Falacho, Rui I., Marques, Joana A., Palma, Paulo J., Roseiro, Luís, Caramelo, Francisco, Ramos, João Carlos, Guerra, Fernando, Blatz, Markus B.
• Format: Article
• Language: English
• Subjects: Cementation; Composite materials; Composite Resins; Dental Bonding - methods; Dental cement; Dental Cements; Dental Porcelain; film thickness; luting agents; Materials Testing; Random Allocation; Resin Cements; Resins; Scanning electron microscopy; Sectioning; Statistical analysis; Surface Properties; temperature; ultrasonics
• ISSN: 1496-4155; 1708-8240
• DOI: 10.1111/jerd.12851

Objective This study aims to evaluate and compare the film thickness obtained with a resin cement and two composite resins, preheated and/or ultrasonically vibrated, as luting agents. Materials and methods One hundred and twenty‐six (126) pairs of resin discs were randomly assigned to six experimental groups (n = 21) according to luting agent (Variolink Esthetic LC, IPS Empress Direct or Estelite Omega) and cementation technique (preheating at 68°C and/or ultrasonic vibration). Specimens were luted by applying a controlled force. Following sectioning and film thickness measurement through field emission gun scanning electron microscopy, statistical analysis was carried out considering a 5% significance level. Results Statistically significant lower film thickness was observed in Variolink Esthetic LC group when compared to all composite resin groups (p