title: Does microetching enamel reduce bracket failure when indirect bonding mandibular posterior teeth?
abstract: OBJECTIVE
  To determine if microetching the mandibular premolars and first molars prior to acid-etching reduced bracket failures during the first six months of orthodontic treatment.
  
  
  METHODS
  Sixty four patients with 384 mandibular first molar and premolar brackets were used in a split-mouth study design. In each patient the teeth on one side were acid-etched and the contralateral teeth were microetched prior to acid-etching. The microetched side was alternated in successive patients. The brackets were indirect bonded to the teeth on both sides. First time bracket failures were recorded over a 6-month period.
  
  
  RESULTS
  Two brackets (1 per cent) came loose on the microetched enamel side and four brackets (2.1 per cent) failed on the conventionally acid-etched side. This difference was not clinically or statistically significant (p = 0.41).
  
  
  CONCLUSIONS
  The addition of microetching prior to acid-etching does not result in fewer bracket failures during the first six months of treatment.
authors.affiliation: pmiles@beautifulsmiles.com.au
authors.forename: Peter G
authors.initials: PG
authors.lastname: Miles
mesh_terms: D000293:Adolescent; D000328:Adult; D001641:Bicuspid; D002648:Child; D001840:Dental Bonding; D045662:Dental Etching / Q000379:methods*; D006801:Humans; D008297:Male; D008334:Mandible; D008963:Molar; D016910:Orthodontic Brackets; D011446:Prospective Studies