The effect of preheating resin composites on surface hardness: a systematic review and meta-analysis
Restorative Dentistry & Endodontics
;
: e41-2019.
Article
in English
| WPRIM
| ID: wpr-761319
ABSTRACT
OBJECTIVES:
This paper presents a systematic review and meta-analysis of the effect of preheating on the hardness of nanofilled, nanoceramic, nanohybrid, and microhybrid resin composites. MATERIALS ANDMETHODS:
An electronic search of papers on MEDLINE/PubMed, ScienceDirect, and EBSCOhost was performed. Only in vitro studies were included. Non-English studies, case reports, clinical trials, and review articles were excluded. A meta-analysis of the reviewed studies was conducted to quantify differences in the microhardness of the Z250 microhybrid resin composite using the Comprehensive Meta-Analysis software.RESULTS:
Only 13 studies met the inclusion criteria for this systematic review. The meta-analysis showed that there were significant differences between the non-preheated and preheated modes for both the top and bottom surfaces of the specimens (p < 0.05). The microhardness of the Z250 resin composite on the top surface in the preheated mode (78.1 ± 2.9) was higher than in the non-preheated mode (67.4 ± 4.0; p < 0.001). Moreover, the microhardness of the Z250 resin composite on the bottom surface in the preheated mode (71.8 ± 3.8) was higher than in the non-preheated mode (57.5 ± 5.7, p < 0.001).CONCLUSIONS:
Although the results reported in the reviewed studies showed great variability, sufficient scientific evidence was found to support the hypothesis that preheating can improve the hardness of resin composites.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
In Vitro Techniques
/
Hardness
Type of study:
Systematic reviews
Language:
English
Journal:
Restorative Dentistry & Endodontics
Year:
2019
Type:
Article
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