title: Clinical performance of cervical restorations with desensitizing agents: 18-month clinical trial.
abstract: OBJECTIVE
  To evaluate the clinical performance and postoperative sensitivity of noncarious Class V restorations with and without the use of a potassium oxalate-based desensitizing agent over a period of 18 months.
  
  
  METHODS
  One hundred forty cervical lesions (40 patients) were selected and randomly divided into four groups: group 1 (G1) - teeth restored with the application of a potassium oxalate-based desensitizing agent (BisBlock) after acid etching and before the application of the adhesive Adper Single Bond 2; group 2 (G2) - teeth restored using the same adhesive system used in G1, without the use of any desensitizing agent; group 3 (G3) - similar to G1, but using the adhesive One-Step; group 4 (G4) - similar to G3, but without the application of BisBlock. All restorations were evaluated (double blind) after 1 week and 2, 6, 12, and 18 months according to the modified USPHS criteria. The McNemar and chi-square tests were used to analyze the results (p ≤ 0.05).
  
  
  RESULTS
  There were no statistical differences between groups restored with or without the use of a desensitizing agent for postoperative sensitvity. After 18 months, retention rates proved to be statistically significantly lower for One-Step than Adper Single Bond 2.
  
  
  CONCLUSIONS
  The use of potassium oxalate-based desensitizing agent did not decrease postoperative sensitivity when it was used under composite resin restorations.
authors: Department of Operative Dentistry, Federal Univeral of Santa Catarina, Florianoplis, Brazil. neimarsartori@gmail.com
authors: Neimar
authors: N
authors: Sartori
authors: Guilherme Carpena
authors: GC
authors: Lopes
authors: Luiz Clovis
authors: LC
authors: Vieira
mesh_terms: D000134:Acid Etching, Dental; D016009:Chi-Square Distribution; D003188:Composite Resins; D003738:Dental Cements; D003793:Dental Restoration, Permanent / Q000009:adverse effects / Q000145:classification / Q000379:methods*; D057133:Dentin Desensitizing Agents / Q000627:therapeutic use*; D003807:Dentin Sensitivity / Q000209:etiology / Q000517:prevention & control*; D017220:Dentin-Bonding Agents; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008689:Methacrylates; D010070:Oxalates / Q000627:therapeutic use; D019815:Oxalic Acid / Q000627:therapeutic use*; D019279:Resin Cements; D018709:Statistics, Nonparametric; D019237:Tooth Cervix; D057085:Tooth Wear / Q000628:therapy*
chemical_list: C554641:Adper single bond 2; C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; C514542:BisBlock; D003188:Composite Resins; D003738:Dental Cements; D057133:Dentin Desensitizing Agents; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D010070:Oxalates; D019279:Resin Cements; D019815:Oxalic Acid