دورية أكاديمية
أعرض في EDS

Effect of four different mono and multi-wave light-curing units on the Knoop hardness of veneer resin composites.

التفاصيل البيبلوغرافية
العنوان: Effect of four different mono and multi-wave light-curing units on the Knoop hardness of veneer resin composites.
المؤلفون: Peres TS; School of Dentistry, UFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil., de Quirino Oliveira HL; School of Dentistry, UFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil., Mendoza LCL; School of Dentistry, UFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil., Ribeiro MTH; School of Dentistry, UFU - Universidade Federal de Uberlândia, MG, Brazil., Carlo HL; Dentistry Department, School of Dentistry, UFU - Universidade Federal de Uberlândia, MG, Brazil., Price RB; Dental Clinical Sciences Department and School of Biomedical Engineering, Dalhousie University, Halifax, Nova Scotia, Canada., Soares CJ; Dentistry Department, School of Dentistry, UFU - Universidade Federal de Uberlândia, MG, Brazil. Electronic address: carlosjsoares@ufu.br.
المصدر: Dental materials : official publication of the Academy of Dental Materials [Dent Mater] 2024 Jan; Vol. 40 (1), pp. 80-89. Date of Electronic Publication: 2023 Oct 31.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Science Country of Publication: England NLM ID: 8508040 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-0097 (Electronic) Linking ISSN: 01095641 NLM ISO Abbreviation: Dent Mater
أسماء مطبوعة: Publication: 1998- : Kidlington, Oxford, UK : Elsevier Science
Original Publication: Copenhagen : Munksgaard, c1985-
مواضيع طبية MeSH: Curing Lights, Dental* , Light-Curing of Dental Adhesives*, Hardness ; Materials Testing ; Composite Resins ; Dental Materials ; Polymerization
مستخلص: Objectives: To evaluate the effect of mono and multi-wave light-curing units (LCUs) on the Knoop hardness of resin-based composites (RBC) that use different photoinitiators.
Methods: Central incisor-shaped specimens 12 mm long, 9 mm wide, and 1.5 mm thick were made from 2 RBCs that use different photoinitiators: Tetric N-Ceram (Ivoclar Vivadent) - and Vittra APS (FGM), both A2E shade. They were light-cured with 4 different LCUs: two claimed to be multi-wave - VALO Grand (Ultradent) and Emitter Now Duo (Schuster); and two were monowave - Radii Xpert (SDI) and Elipar DeepCure-L (3 M Oral Care) using 2 different light exposure protocols: one 40 s exposure centered over the specimen; and two 20 s light exposures that delivered light from two positions to better cover the entire tooth. 16 groups with 10 specimens in each group were made. The Knoop hardness (KH, kg/mm 2 ) was measured at the top and bottom of the specimen in the center and at the cervical, incisal, mesial, and distal peripheral regions. The active tip diameters (mm) and spectral radiant powers (mW/nm) of the LCUs were measured with and without the interposition of the RBC, as well as the radiant exposure beam profiles (J/cm²) delivered to the top of the RBCs. The data was analyzed using Three-way ANOVA and Tukey's tests (α = 0.05).
Results: The VALO Grand (1029 mW) emitted twice the power of the Radii Xpert (500 mW). The KH values of VI and TN resin composite specimens were significantly affected by the LCU used (p < .001), the measurement location (p < .001), and the surface of the specimen (p < .001). LCUs with wider tip diameters produced greater Knoop hardness values at the peripheries of the 12 mm of long, 9 mm wide specimens. In general, the VALO Grand produced the highest KH values, followed by Elipar DeepCure-L, then by Radii Xpert. The Emitter Now Duo LCU produced the lowest values. Exposing the veneers from two locations reduced the differences between the LCUs and the effect of the measurement location. Only the VALO Grand could fully cover the composite veneer with light when the two locations were used.
Significance: The light tip must cover the entire restoration to photocure the RBC beneath the light tip.
Competing Interests: Declarations of Interest None. All authors actively participated in the discussion of the manuscript findings, reviewed and approved the final version of this manuscript.
(Copyright © 2023. Published by Elsevier Inc.)
فهرسة مساهمة: Keywords: Light exposure technique; Light-curing unit; Microhardness; Resin composite
المشرفين على المادة: 0 (Composite Resins)
0 (Dental Materials)
تواريخ الأحداث: Date Created: 20231102 Date Completed: 20231222 Latest Revision: 20231222
رمز التحديث: 20231222
DOI: 10.1016/j.dental.2023.10.019
PMID: 37919111
قاعدة البيانات: MEDLINE
الوصف
تدمد:1879-0097
DOI:10.1016/j.dental.2023.10.019