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The effect of preheating resin composites on surface hardness: a systematic review and meta-analysis

Restorative Dentistry & Endodontics 2019년 44권 4호 p.41 ~ 41
Elkaffas Ali A., Eltoukhy Radwa I., Elnegoly Salwa A., Mahmoud Salah H.,
소속 상세정보
 ( Elkaffas Ali A. ) - Mansoura University Faculty of Dentistry Department of Operative Dentistry
 ( Eltoukhy Radwa I. ) - Mansoura University Faculty of Dentistry Department of Operative Dentistry
 ( Elnegoly Salwa A. ) - Mansoura University Faculty of Dentistry Department of Operative Dentistry
 ( Mahmoud Salah H. ) - Mansoura University Faculty of Dentistry Department of Operative Dentistry

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 and Methods: 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.

키워드

Composite temperature; Meta-analysis; Microhardness; Microhybrid; Preheated composite; Systematic review

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