title: Comparison of using calcium hydroxide or a dentine primer for reducing dentinal pain following crown preparation: a randomized clinical trial with an observation time up to 30 months.
abstract: The purpose of this study was to evaluate effect of a calcium hydroxide suspension [Ca(OH)2] or glutaraldehyde based dentine primer (GDP) to reduce tooth sensitivity after full crown preparation. Thirty-six patients were treated with Ca(OH)(2) on one tooth and with GDP on another. Patients completed a questionnaire regarding sensitivity during crown preparation, when the not-anaesthetized abutments were irritated [cotton pellet (20 degrees C)]. The teeth were tested before (T(0)) and after using the desensitizer (T(1)), again after 7 days (T(2)), 6 months (T(3)) and 30 months (T(4)). The results were registered on a visual analogue scale [0 (no pain)-100 (severe pain)]. The changes of tooth sensitivity between different testing times were analysed. The median and the (interquartile range) for the different time intervals for Ca(OH)(2) were DeltaT(0)-T(1): 5 (6-17), DeltaT(0)-T(2): 17 (14-32), and for GDP, DeltaT(0)-T(1): 9 (7-18) DeltaT(0)-T(2): 18 (16-33), the decreases in sensitivity were lower for DeltaT(0)-T(1) than for DeltaT(0)-T(2) for both desensitizers (P < 0.001). There was no statistical difference (P > 0.05) between the agents (DeltaT(0)-T(1), DeltaT(0)-T(2), DeltaT(3)-T(4)). Both substances might be useful in reducing tooth sensitivity after crown preparation, but no differences in the efficacy were found when comparing the materials.
authors.affiliation: Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, University Hospital Schleswig-Holstein, Campus Kiel, Germany. swolfart@proth.uni-kiel.de
authors.forename: S
authors.initials: S
authors.lastname: Wolfart
authors.forename: S M
authors.initials: SM
authors.lastname: Wegner
authors.forename: M
authors.initials: M
authors.lastname: Kern
mesh_terms: D000328:Adult; D000368:Aged; D001843:Bone Cements / Q000627:therapeutic use*; D002126:Calcium Hydroxide / Q000627:therapeutic use*; D003442:Crowns; D003807:Dentin Sensitivity / Q000517:prevention & control*; D017220:Dentin-Bonding Agents / Q000627:therapeutic use*; D004202:Disinfectants / Q000627:therapeutic use; D005260:Female; D005976:Glutaral / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement / Q000379:methods; D019231:Tooth Preparation, Prosthodontic / Q000009:adverse effects* / Q000379:methods; D014098:Toothache / Q000517:prevention & control*
chemical_list: D001843:Bone Cements; D017220:Dentin-Bonding Agents; D004202:Disinfectants; D002126:Calcium Hydroxide; D005976:Glutaral