The effect of preheating resin composites on surface hardness: a systematic review and meta-analysis.
Ali A ElkaffasRadwa I EltoukhySalwa A ElnegolySalah Hasab MahmoudPublished in: Restorative dentistry & endodontics (2019)
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.