title: Temperature rise and shear bond strength of bondable buccal tubes bonded by various light sources.
abstract: The objective of the present investigation was to determine the intrapulpal temperature changes and to compare the shear bond strength (SBS) of bondable buccal tubes bonded by high-intensity light sources. Ninety caries-free human first molar teeth extracted for periodontal reasons were used. For the temperature measurement test, 30 teeth were randomly divided into three groups (n = 10) whereas 60 teeth were used in three groups (n = 20) for SBS testing. Three light sources, high-intensity halogen, blue light-emitting diode (LED), and xenon plasma arc (PAC), were used for polymerization of Transbond XT. Temperature variations (Delta T) were recorded by a K-type thermocouple wire connected to a data logger. For SBS testing, a universal testing machine was used at a crosshead speed of 1 mm/minute until buccal tube bonding failure occurred. Data were analyzed using the Kruskal-Wallis test. The high-intensity halogen light resulted in significantly (P < 0.01) higher intrapulpal temperature changes than the LED or PAC. The results of the shear bond test revealed significant (P < 0.05) differences only between the halogen and LED groups. The findings of the present investigation showed that high-intensity curing devices can safely be used in bonding buccal tubes to molar teeth without causing a deleterious effect on the dental pulp.
authors.affiliation: Department of Orthodontics, Gazi University, Ankara, Turkey. culusoy77@hotmail.com
authors.forename: Cagri
authors.initials: C
authors.lastname: Ulusoy
authors.forename: Ozgür
authors.initials: O
authors.lastname: Irmak
authors.forename: Yildirim Hakan
authors.initials: YH
authors.lastname: Bagis
authors.forename: Ozgür Ilke Atasoy
authors.initials: OI
authors.lastname: Ulusoy
mesh_terms: D001831:Body Temperature; D003188:Composite Resins / Q000737:chemistry* / Q000528:radiation effects; D001840:Dental Bonding / Q000379:methods*; D003782:Dental Pulp / Q000528:radiation effects*; D003799:Dental Stress Analysis; D006801:Humans; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D008963:Molar; D016910:Orthodontic Brackets; D019279:Resin Cements / Q000737:chemistry* / Q000528:radiation effects; D033081:Shear Strength; D018709:Statistics, Nonparametric
chemical_list: D003188:Composite Resins; D019279:Resin Cements