title: Pulp chamber temperature increase from curing light units: an in vitro study.
abstract: OBJECTIVE
  The purpose of this study was to compare temperature rises in the pulp chamber induced by halogen, plasma arc, and conventional light-emitting diode (LED) curing units with that induced via a new generation LED-curing unit (VALO) in extra power mode.
  
  
  METHODS
  A Class I cavity was prepared on the occlusal surface of 80 extracted caries- free mandibular third molars, which were filled with a microhybrid composite. A thermocouple wire was inserted into the pulp chamber of each tooth to measure temperature changes.
  
  
  RESULTS
  The greatest temperature increases were observed during polymerization of composite resin with a halogen curing unit (3.2 degrees Celsius), followed by plasma arc curing (2.07 degrees Celsius) and VALO curing (1.44 degrees Celsius); the lowest temperature rise was with conventional LED curing (1.01 degrees Celsius).
  
  
  CONCLUSIONS
  There were no statistically significant differences between conventional LED and VALO curing in extra power mode regarding pulp chamber temperature increases when polymerizing composite resin.
authors.affiliation: Department of Pediatric Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey. k_cantekin@hotmail.com.
authors.forename: Kenan
authors.initials: K
authors.lastname: Cantekin
authors.affiliation: Department of Orthodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Suleyman Kutalmis
authors.initials: SK
authors.lastname: Buyuk
authors.affiliation: Department of Pediatric Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Ebru
authors.initials: E
authors.lastname: Delikan
authors.affiliation: Department of Pediatric Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Kübra
authors.initials: K
authors.lastname: Pedük
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Sezer
authors.initials: S
authors.lastname: Demirbuga
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D055117:Curing Lights, Dental; D003786:Dental Pulp Cavity / Q000528:radiation effects*; D006801:Humans; D066298:In Vitro Techniques; D055115:Light-Curing of Dental Adhesives / Q000295:instrumentation*; D008964:Molar, Third; D058105:Polymerization; D013696:Temperature
chemical_list: D003188:Composite Resins