title: The impact of chlorhexidine mouth rinse on the bond strength of polycarbonate orthodontic brackets.
abstract: OBJECTIVE
  The purpose of the current in-vivo study was to assess the effect of using 0.12% chlorhexidine (CHX) mouth rinse, before bonding, on shear bond strength of polycarbonate brackets bonded with composite adhesive.
  
  
  METHODS
  Eighteen orthodontic patients with a mean age 21.41 ± 1.2 years, who were scheduled to have 2 or more first premolars extracted, were included in this study. Patients were referred for an oral prophylaxis program which included, in part, the use of a mouth rinse. Patients were divided into 2 groups, a test group of 9 patients who used 0.12% CHX gluconate mouth rinse twice daily and a control group of 9 patients who used a mouth rinse without CHX, but with same color. After 1 week, polycarbonate brackets were bonded to first premolars with Transbond XT composite adhesive. Premolars were extracted after 28 days and tested for shear bond strength on a universal testing machine. Student's t-test was used to compare shear bond strengths of both groups.
  
  
  RESULTS
  No statistically significant difference was found in bond strengths' values between both groups. The test group (with CHX) has mean shear bond strength of 14.21 ± 2.42 MPa whereas the control group (without CHX) revealed a mean strength of 14.52 ± 2.31 MPa.
  
  
  CONCLUSIONS
  The use of 0.12% CHX mouth rinse, for one week before bonding, did not affect the shear bond strength of polycarbonate brackets bonded with Transbond composite. Furthermore, these brackets showed clinically acceptable bond strength.
authors.affiliation: Lecturer, Department of Orthodontics, Faculty of Dental Medicine, Al- Azhar University, Cairo, Egypt, e-mail: codriyadh@gmail.com.
authors.forename: Farouk Ahmed
authors.initials: FA
authors.lastname: Hussein
authors.affiliation: Assistant Professor, Dental Health Department, Dental Biomaterials Research Chair, College of Applied Medical Sciences, King Saud University; Department of Dental Biomaterial, Al-Azhar University, Cairo, Egypt.
authors.forename: Mohammed Ibrahim
authors.initials: MI
authors.lastname: Hashem
authors.affiliation: Researcher, Department of Oral Pathology, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Elna P
authors.initials: EP
authors.lastname: Chalisserry
authors.affiliation: Professor, Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Sukumaran
authors.initials: S
authors.lastname: Anil
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000293:Adolescent; D000891:Anti-Infective Agents, Local / Q000737:chemistry*; D002710:Chlorhexidine / Q000031:analogs & derivatives* / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D055117:Curing Lights, Dental / Q000145:classification; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000295:instrumentation; D006801:Humans; D009067:Mouthwashes / Q000737:chemistry*; D016910:Orthodontic Brackets; D010756:Phosphoric Acids / Q000737:chemistry; D010919:Placebos; D011076:Polycarboxylate Cement / Q000737:chemistry*; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D055815:Young Adult
chemical_list: D000891:Anti-Infective Agents, Local; D003188:Composite Resins; D003722:Dental Alloys; D003764:Dental Materials; D009067:Mouthwashes; D010756:Phosphoric Acids; D010919:Placebos; D011076:Polycarboxylate Cement; D019279:Resin Cements; C477790:Transbond XT; D013193:Stainless Steel; C005506:polycarbonate; C030242:phosphoric acid; C010882:chlorhexidine gluconate; D002710:Chlorhexidine
keywords: Anil S. The Impact of Chlorhexidine Mouth Rinse on the Bond Strength of Polycarbonate Orthodontic Brackets. J Contemp Dent Pract 2014;15(6):688-692. Source of support: Nil Conflict of interest: None declared.; Chalisserry EP; Chlorhexidine; Composite adhesive; Hashem MI; Polycarbonate brackets; Shear bond strength. How to cite this article: Hussein FA