title: Long-term clinical failure rate of molar tubes bonded with a self-etching primer.
abstract: The purpose of this study was to assess the long-term in vivo failure rate of tubes bonded to first and second molars with a self-etching primer (SEF). A total of 810 molar tubes (414 first molar and 396 second molar) were bonded on 135 patients (56 male, 79 female; mean age 14 years) with the 3M Transbond Plus Self Etching Primer. The first-time failures of the tubes were recorded for a mean period of 26 months (range 23-29 months). Failure rates per jaw (maxilla-mandible), tooth (first and second molar), and quadrant (left, right) were analyzed with the chi(2) at alpha = 0.05 level of significance. Significant differences were found in the failure rate between first and second molars (9.66% vs 20%, respectively) as well as maxillary and mandibular molars (7.5% vs 21%, respectively). The combined, total failure rate for first and second molars was 14.80%. No difference was found between male and female failure rates for the molar tubes. First-molar tubes bonded with an SEF may show failure rates comparable with those reported in the literature for tubes bonded with conventional acid etching.
authors.affiliation: Department of Orthodontics, Aristotle University of Thessaloniki, Greece.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Pandis
authors.forename: Lars
authors.initials: L
authors.lastname: Christensen
authors.forename: Theodore
authors.initials: T
authors.lastname: Eliades
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D004868:Equipment Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008334:Mandible; D008437:Maxilla; D008963:Molar; D009532:Nickel / Q000737:chemistry; D009967:Orthodontic Appliances; D009969:Orthodontic Wires; D019279:Resin Cements / Q000737:chemistry*; D012737:Sex Factors; D013193:Stainless Steel / Q000737:chemistry; D014025:Titanium / Q000737:chemistry
chemical_list: D003722:Dental Alloys; D019279:Resin Cements; C429625:Transbond Plus Self-Etching Primer; C477790:Transbond XT; C040654:titanium nickelide; D013193:Stainless Steel; D009532:Nickel; D014025:Titanium