دورية أكاديمية
Impact of the distance of light curing on the degree of conversion and microhardness of a composite resin.
| العنوان: | Impact of the distance of light curing on the degree of conversion and microhardness of a composite resin. |
|---|---|
| المؤلفون: | Catelan A; Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas , Piracicaba, SP , Brazil., de Araújo LS, da Silveira BC, Kawano Y, Ambrosano GM, Marchi GM, Aguiar FH |
| المصدر: | Acta odontologica Scandinavica [Acta Odontol Scand] 2015 May; Vol. 73 (4), pp. 298-301. Date of Electronic Publication: 2015 Feb 01. |
| نوع المنشور: | Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Medical Journals Sweden AB Country of Publication: England NLM ID: 0370344 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1502-3850 (Electronic) Linking ISSN: 00016357 NLM ISO Abbreviation: Acta Odontol Scand Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 2023- : Uppsala, Sweden : Medical Journals Sweden AB Original Publication: Stockholm, Norstedt |
| مواضيع طبية MeSH: | Curing Lights, Dental*/classification, Composite Resins/*chemistry , Dental Materials/*chemistry , Light-Curing of Dental Adhesives/*methods, Carbon/chemistry ; Hardness ; Humans ; Light-Curing of Dental Adhesives/instrumentation ; Methacrylates/chemistry ; Polymerization ; Random Allocation ; Spectroscopy, Fourier Transform Infrared ; Spectrum Analysis, Raman ; Surface Properties |
| مستخلص: | Objective: This study evaluated the impact of the distance between the light guide tip of the curing unit and material surface on the degree of conversion and Knoop microhardness of a composite resin. Materials and Methods: Circular samples were carried out of a methacrylate micro-hybrid resin-based composite and light cured at 0, 2 and 4 mm distance. Monomer conversion rate was measured using a Fourier-transform Raman spectrometer and Knoop hardness number was obtained using a microhardness tester on the top and bottom surfaces. Data were statistically analyzed by analysis of variance and Tukey's test (α=0.05). Results: Overall, the increase of curing distance reduced the microhardness (p≤0.05), but did not influence the carbon double bond conversion rate (p>0.05) of the composite resin tested; and the top surface showed better properties compared to the bottom (p≤0.05). Conclusions: The light curing at distance can reduce mechanical properties and could affect long-term durability of the composite restorations. Thus, the use of a curing device with high irradiance is recommended. |
| فهرسة مساهمة: | Keywords: dental materials; physical properties; polymerization |
| المشرفين على المادة: | 0 (Composite Resins) 0 (Dental Materials) 0 (Filtek Z250) 0 (Methacrylates) 7440-44-0 (Carbon) |
| تواريخ الأحداث: | Date Created: 20150203 Date Completed: 20151229 Latest Revision: 20181202 |
| رمز التحديث: | 20240628 |
| DOI: | 10.3109/00016357.2014.946965 |
| PMID: | 25639534 |
| قاعدة البيانات: | MEDLINE |
PDF full text from Publisher كن أول من يترك تعليقا!