Selection of participants
tissue loss, MIH, carious
The participants were recruited from patients admitted to a Pediatric Dentistry Department for routine dental treatment between August 2019, and January 2021.The inclusion criteria were as follows:
6–13-year-old healthy children with at least two fully-erupted permanent first molars showing extensive tissue loss due to multiple (at least three) carious surfaces with or without MIH, which cannot be effectively restored with a direct restoration, e.g. resin composite [