title: Strength of attachment between band and glass ionomer cement.
abstract: OBJECTIVE
  To determine the strength of attachment between plain stainless steel band material and glass ionomer cement.
  
  
  METHODS
  Seventy-five extracted upper premolars, free of visible structural defects, were used. The teeth were divided randomly into three groups and embedded in acrylic resin blocks. A short length of plain, stainless steel band material with a welded stainless steel standard edgewise 0.022 inch bracket was adapted to the buccal surface of each tooth. The bracket-stainless steel pads were then cemented to the teeth with either Bandtite (Group 1), Granitec (Group 2) or Ariadent (Group 3) glass ionomer cement and stored in an incubator at 37 degrees C for 30 days. The shear bond strengths of the specimens were measured and compared.
  
  
  RESULTS
  The mean shear bond strengths (SBS) were significantly different: Bandtite 0.7331 +/- 0.056 Mpa; Granitec 0.3869 +/- 0.047 Mpa; Ariadent 0.2931 +/- 0.033 Mpa (ANOVA, p < 0.001). Tukey HSD post-hoc tests also showed significant differences between Bandtite and Granitec, Bandtite and Ariadent, and Granitec and Ariadent (p < 0.001). All specimens failed at the band-cement interface.
  
  
  CONCLUSIONS
  The highest and lowest SBS were related to Bandtite and Ariadent cements, respectively. All cements had bond strengths less than the range of bond strengths considered to be clinically acceptable for bonded orthodontic attachments. Mechanical factors are important for band retention.
authors.affiliation: Department of Orthodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran. elahevahid@dent.sbmu.ac.ir
authors.forename: Elahe Vahid
authors.initials: EV
authors.lastname: Dastjerdie
authors.forename: Houman
authors.initials: H
authors.lastname: Zarnegar
authors.forename: Mohammad
authors.initials: M
authors.lastname: Behnaz
authors.forename: Massoud
authors.initials: M
authors.lastname: Seifi
mesh_terms: D000268:Adhesiveness; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding; D012994:Dental Soldering; D003799:Dental Stress Analysis / Q000295:instrumentation; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D009967:Orthodontic Appliances; D016910:Orthodontic Brackets; D033081:Shear Strength; D013193:Stainless Steel / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
chemical_list: D003722:Dental Alloys; D005899:Glass Ionomer Cements; D013193:Stainless Steel