Smoke and mirrors - does smoking cause discolouration of composite restorations?

Data Sources: Searches were carried out across PubMed, Embase, Scopus and Web of Science for studies published until 28th March 2022.

Study Selection: In vitro studies assessing colour stability of resin-based composites (RBCs) exposed to conventional cigarette smoke (CS), tobacco heating systems (THS) or electronic nicotine delivery systems (ENDS) were considered. Included studies used a spectrophotometer or colorimeter for assessment of discolouration and measured discolouration using CIELAB or CIEDE2000 colour difference formulas.