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Quintessence Publishing: Journals: ORTHODONTICS
The Art and Practice of Dentofacial Enhancement

Formerly World Journal of Orthodontics

Edited by
Rafi Romano, DMD, MSc (Editor-in-Chief)

ISSN 2160-2999 (print) / ISSN 2160-3006 (online)

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Spring 2006
Volume 7 , Issue 1

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A comparative assessment of the failure rate of molar tubes bonded with a self-etching primer and conventional acid-etching

Nikolaos Pandis, DDS, MS / Argyro Polychronopoulou, DDS, MSc, ScM, ScD / Theodore Eliades, DDS, MS Dr Med, PhD

Pages: 4144
PMID: 16548305

Objectives: Comparative assessment of the failure rate of molar tubes bonded to first and second molars with a self-etching primer and conventional acid-etching. Material and Methods: Four hundred forty-four molar tubes (246 first molar tubes and 198 second molar tubes) were bonded, using a split-mouth design, on 62 patients (23 male, 39 female; mean age 13.7 years) with the 3M Transbond Plus self-etching primer combined with Transbond XT paste; or with conventional acid-etching, Orthosolo primer, and Enlight adhesive paste. First-time failures were recorded over a period of 15 months. Results: Bond failure per adhesive system, arch (maxilla-mandible), quadrant (left, right) and tooth (first or second molar) were studied. Statistical analysis using logistic regression modeling (alpha = .05) showed that the overall failure rate for the first and second molar tubes was 11% (8% with self-etching primer and 13% with conventional acid-etching). No significant difference was found between the 2 bonding methods. Tooth location and type showed statistically significant associations. Mandibular tubes showed a 3:1 probability for failure compared to maxillary tubes. Right-sided tubes demonstrated 3 times more failures when compared to left-sided tubes, and second molar tubes showed a 3-fold increase in failure. Conclusion: Molar tube bonding with self-etching primer shows similar success rates to conventional acid-etching, whereas the mandibular right second molar presents the highest failure incidence.
World J Orthod 2006;7:4144.

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