Effect of High-Irradiance Light-Curing on Micromechanical Properties of Resin Cements.

Peutzfeldt, Anne; Lussi, Adrian; Flury, Simon (2016). Effect of High-Irradiance Light-Curing on Micromechanical Properties of Resin Cements. BioMed research international, 2016, p. 4894653. Hindawi Publishing Corporation 10.1155/2016/4894653

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This study investigated the influence of light-curing at high irradiances on micromechanical properties of resin cements. Three dual-curing resin cements and a light-curing flowable resin composite were light-cured with an LED curing unit in Standard mode (SM), High Power mode (HPM), or Xtra Power mode (XPM). Maximum irradiances were determined using a MARC PS radiometer, and exposure duration was varied to obtain two or three levels of radiant exposure (SM: 13.2 and 27.2 J/cm(2); HPM: 15.0 and 30.4 J/cm(2); XPM: 9.5, 19.3, and 29.7 J/cm(2)) (n = 17). Vickers hardness (HV ) and indentation modulus (EIT) were measured at 15 min and 1 week. Data were analyzed with nonparametric ANOVA, Wilcoxon-Mann-Whitney tests, and Spearman correlation analyses (α = 0.05). Irradiation protocol, resin-based material, and storage time and all interactions influenced HV and EIT significantly (p ≤ 0.0001). Statistically significant correlations between radiant exposure and HV or EIT were found, indicating that high-irradiance light-curing has no detrimental effect on the polymerization of resin-based materials (p ≤ 0.0021). However, one resin cement was sensitive to the combination of irradiance and exposure duration, with high-irradiance light-curing resulting in a 20% drop in micromechanical properties. The results highlight the importance of manufacturers issuing specific recommendations for the light-curing procedure of each resin cement.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry
04 Faculty of Medicine > School of Dental Medicine
04 Faculty of Medicine > School of Dental Medicine > School of Dental Medicine, Restorative Dentistry, Research

UniBE Contributor:

Peutzfeldt, Anne and Lussi, Adrian

Subjects:

600 Technology > 610 Medicine & health

ISSN:

2314-6133

Publisher:

Hindawi Publishing Corporation

Language:

English

Submitter:

Eveline Carmen Schuler

Date Deposited:

02 Feb 2017 15:20

Last Modified:

05 Feb 2017 02:11

Publisher DOI:

10.1155/2016/4894653

PubMed ID:

28044129

BORIS DOI:

10.7892/boris.93027

URI:

https://boris.unibe.ch/id/eprint/93027

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