title: Child toothbrush abrasion effect on ionomeric materials.
abstract: The purpose of the study was to evaluate the abrasive effect of different toothbrushes-soft-cross bristles (CB), extra-soft-parallel bristles (ES), and soft-parallel bristles (S)-on the surface roughness of conventional (C) and resin-modified (V) glass ionomer cements in vitro. Eight specimens of each material were prepared for each group: (1) V and CB; (2) V and ES; (3) V and S; (4) C and CB; (5) C and ES; and (6) C and S. Specimens were stored at 37 degrees C/24 hours and 100% humidity, polished, and initially analyzed with a surface roughness-measuring device. Next, they were fixed to the tooth-brushing device and abraded via toothbrushes, using a dentifrice slurry, performed at 250 cycles/minute with a 200 g load. The specimens were washed, dried, and analyzed identically with the same device. There was no significant interaction between material and toothbrush types. After tooth-brushing, V showed significantly higher surface roughness than C and CB and created higher surface roughness than S. No difference was observed between these toothbrushes and ES. Regardless of the toothbrush type used, resin-modified glass ionomer cement showed the highest roughness values.
authors.affiliation: Department of Restorative Dentistry-Dental Materials Program, Dental School of Piracicaba, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
authors.forename: Fabíola G
authors.initials: FG
authors.lastname: Carvalho
authors.forename: Suzana B P
authors.initials: SB
authors.lastname: Fucio
authors.forename: Andréia B
authors.initials: AB
authors.lastname: Paula
authors.forename: Gisele Maria
authors.initials: GM
authors.lastname: Correr
authors.forename: Mario A C
authors.initials: MA
authors.lastname: Sinhoreti
authors.forename: Regina M
authors.initials: RM
authors.lastname: Puppin-Rontani
mesh_terms: D003775:Dental Polishing; D003802:Dentifrices / Q000737:chemistry; D004867:Equipment Design; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014099:Toothbrushing / Q000295:instrumentation*
chemical_list: D003802:Dentifrices; D005899:Glass Ionomer Cements; D019279:Resin Cements