Is It Necessary to Photoactivate the Adhesive System Inside Ceramic Laminate Veneers in a Luting Procedure?
| Autor: | Paulo Henrique dos Santos, Henrico Badaoui Strazzi-Sahyon, Afonso Chimanski, Humberto Naoyuki Yoshimura |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Federal do ABC (UFABC) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Ceramics
Materials science medicine.medical_treatment Color Dental Cements 03 medical and health sciences 0302 clinical medicine Dental porcelain Dental cement Materials Testing medicine Ceramic Composite material Elastic modulus Curing (chemistry) 030206 dentistry General Medicine Dental Porcelain Accelerated aging Resin Cements Dental Veneers visual_art visual_art.visual_art_medium Veneer Adhesive Oral Surgery |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2020-12-10T19:39:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-11-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Purpose: To investigate the need for photoactivation of the adhesive system inside ceramic laminates before the luting procedure and to evaluate the color stability, nanohardness, and elastic modulus of the adhesive interface activated with singlewave and polywave light-curing units. Materials and Methods: A total of 44 lithium disilicate ceramic veneers (7.0 mm x 8.0 mm x 0.6 mm) were fabricated, bonded to enamel, and sorted into four experimental groups (n = 11 each) according to the type of light-curing unit (Radii-Cal [singlewave] or Valo [polywave]) and mode of adhesive system activation (with or without previous photoactivation). Two luting agents were used: the Tetric N- Bond adhesive system and Variolink Veneer resin cement. A visible ultraviolet spectrophotometer was used to evaluate the color stability before and after UVB artificial accelerated aging for 252, 504, and 756 hours (n = 8 samples from each group). A nanohardness tester under a load of 1,000 mu N was used to evaluate the nanohardness and elastic modulus (n = 3 samples from each group). Data regarding the color stability and the mechanical properties (nanohardness and elastic modulus) were subjected to analysis of variance and Tukey protected least significant difference test (alpha =.05). Results: Prior activation of the adhesive system, the distinct light-curing units, and different aging periods exerted no significant difference on the color stability or mechanical properties of the resin cement (P >.05), except for in the group activated with Radii-Cal after 756 hours, in which the nonprevious activation showed lower color alteration compared to the previous photoactivation (P =.0285). Without prior activation of the adhesive with Valo, the polywave unit promoted higher nanohardness and elastic modulus values in the adhesive system (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|