title: The effect of dentin desensitizers on thermal changes in the pulp chamber during fabrication of provisional restorations.
abstract: The purpose of this study was to evaluate the effect of two dentin desensitizers on the pulp chamber temperature increase during fabrication of provisional restorations by a direct method. Sixty intact extracted mandibular third molars were prepared for a metal-ceramic complete crown. Then the teeth were randomly divided into three groups of 20 each. Group 1, no dentin desensitizer was used as the control group; group 2, a resin-based dentin desensitizer was selected; and group 3, the prepared teeth surfaces were coated with polyurethane cyanoacrylate adhesive. Each of the three groups was further divided into two polymerizing systems (autopolymerizing and a photopolymerizing) of 10 each. After insertion of the resin-filled matrix, the temperature change in the pulpal chamber was recorded with thermocouple connected to a data logger. anova indicated no significant differences for all combinations of desensitizing agents and curing methods (P > 0.05). When light cured composite or chemical curing acrylics were used to make temporary crowns, the presence of desensitizing agent did not reduce the temperature transmitted from the provisional material; the residual temperature rise transmitted was of such a magnitude as to cause concern regarding possible thermal injury to pulp.
authors.affiliation: Selcuk University, Faculty of Dentistry, Department of Prosthodontics, Campus, Konya, Turkey. asli_u@hotmail.com
authors.forename: A
authors.initials: A
authors.lastname: Usumez
authors.forename: A N
authors.initials: AN
authors.lastname: Ozturk
authors.forename: F
authors.initials: F
authors.lastname: Aykent
mesh_terms: D001831:Body Temperature / Q000187:drug effects; D003442:Crowns; D003738:Dental Cements / Q000494:pharmacology*; D003782:Dental Pulp / Q000187:drug effects / Q000502:physiology; D003786:Dental Pulp Cavity / Q000187:drug effects / Q000502:physiology*; D003794:Dental Restoration, Temporary / Q000379:methods*; D003804:Dentin / Q000502:physiology*; D017220:Dentin-Bonding Agents / Q000494:pharmacology*; D005976:Glutaral / Q000494:pharmacology*; D006801:Humans; D008334:Mandible; D008963:Molar; D011109:Polymethacrylic Acids / Q000494:pharmacology*; D019279:Resin Cements
chemical_list: D003738:Dental Cements; D017220:Dentin-Bonding Agents; D011109:Polymethacrylic Acids; D019279:Resin Cements; C075332:Dentin Protector; C044372:Gluma; D005976:Glutaral