title: In vitro evaluation of the thermal alterations on the root surface during preparation with different Ni-Ti rotary instruments.
abstract: The present study evaluated, in vitro, the temperature alterations on the external root surface during instrumentation with four different rotary systems. A total of 20 extracted human maxillary lateral incisors were instrumented using either the ProFile, MicroMega, Quantec or K3 systems and the thermal alterations on the root surface were recorded by means of three thermocouples attached to the coronal, middle and apical portions of the root. Mean temperature increases no higher than 0.4 degrees C +/- 1.0 degrees C (ProFile system) were recorded, which indicates that these instruments are safe for the surrounding periodontal tissues.
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Capelli
authors.forename: Danilo M Zanello
authors.initials: DM
authors.lastname: Guerisoli
authors.forename: Eduardo Luiz
authors.initials: EL
authors.lastname: Barbin
authors.forename: Júlio César Emboava
authors.initials: JC
authors.lastname: Spanó
authors.forename: Jesus Djalma
authors.initials: JD
authors.lastname: Pécora
mesh_terms: D001831:Body Temperature; D003722:Dental Alloys; D003762:Dental Instruments; D004869:Equipment Safety; D006358:Hot Temperature; D006801:Humans; D007180:Incisor; D009532:Nickel; D011897:Random Allocation; D018915:Root Canal Preparation / Q000295:instrumentation*; D014025:Titanium; D014092:Tooth Root
chemical_list: D003722:Dental Alloys; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium