title: Effect of composite resin polymerization modes on temperature rise in human dentin of different thicknesses: an in vitro study.
abstract: The aim of this in vitro study was to evaluate the effect of different polymerization modes on temperature rise in human dentin of different thicknesses, and to evaluate the relation between dentin thickness and temperature rise (TR). For this purpose, 60 specimens were assigned into 20 groups (n = 3): five polymerization modes (1-conventional; 2-soft-start; 3-high intensity; 4-ramp cure: progressive and high intensity; 5-high intensity with the tip of the light-curing unit at a distance of 1.3 cm for 10 s and the tip leaning on the sample) at four dentin thicknesses (0, 1, 2, 3 mm). During composite sample polymerization (2 mm), the temperature was measured by a digital laser thermometer (CMSS2000-SL/SKF). The statistical analyses were conducted by ANOVA (p = 0.05) and post-hoc Tukey's test. There were statistical differences of TR among polymerization modes and dentin thicknesses. The temperature rise was dependent on the polymerization mode and the dentin thickness: the thicker the dentin and the lower the polymerization mode energy, the lower the temperature rise.
authors.affiliation: Piracicaba School of Dentistry, Campinas State University, Av. Limeira, 901, SP, Brazil. aguiarfhb@yahoo.com.br
authors.forename: Flávio Henrique Baggio
authors.initials: FH
authors.lastname: Aguiar
authors.forename: Gisele Kanda Peres
authors.initials: GK
authors.lastname: Barros
authors.forename: Débora Alves Nunes Leite
authors.initials: DA
authors.lastname: Lima
authors.forename: Glaucia Maria Bovi
authors.initials: GM
authors.lastname: Ambrosano
authors.forename: José Roberto
authors.initials: JR
authors.lastname: Lovadino
mesh_terms: D001831:Body Temperature / Q000187:drug effects / Q000502:physiology*; D003188:Composite Resins / Q000008:administration & dosage / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry* / Q000494:pharmacology; D003804:Dentin / Q000187:drug effects / Q000502:physiology*; D006244:Hardness; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008963:Molar / Q000187:drug effects / Q000502:physiology*; D011108:Polymers / Q000737:chemistry*
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D011108:Polymers