Chemical composition of enamel surface as a predictor of in-vitro shear bond strength. American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics [Am J Orthod Dentofacial Orthop] Journal article | | Title | Chemical composition of enamel surface as a predictor of in-vitro shear bond strength. | | Author(s) | Lou L, Heo G, Nelson AE, Alsagheer A, Carey JP, Major PW | | Institution | Orthodontic Graduate Program, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada. | | Source | Am J Orthod Dentofacial Orthop 2009 Nov; 136(5):683-8. | | Abstract | INTRODUCTION: Orthodontic bond failure varies between patients. It has been speculated that the chemical composition of the enamel surface might play a role in the variations in bond failure.
METHODS: X-ray photoelectron spectroscopy was used in analyzing the surface chemical composition of 49 pairs of maxillary right and left first premolars from patients requiring extractions as part of the orthodontic treatment. After x-ray photoelectron spectroscopy analysis, 49 enamel samples were randomly selected for an in-vitro shear bonding study with a materials testing system, Synergie 400 machine (MTS Systems, Eden Prairie, Minn).
RESULTS: The in-vitro shear bond strength was found to have a mean of 6.93 +/- 2.71 MPa. Twelve elements were detected; the major ones were calcium, phosphorus, oxygen, nitrogen, and carbon. Regression analysis with the 12 elements explained 33.3% of the variations in bond strength. However, the contribution was not significant (P = 0.170).
CONCLUSIONS: The chemical composition of the buccal surface of maxillary first premolars was not significant in predicting in-vitro mean shear bond strength. Other factors are likely to be important contributors to the large variations frequently seen in bond strength studies. | | Language | eng | | Pub Type(s) | Journal Article
Research Support, Non-U.S. Gov't
| | PubMed ID | 19892285 |
|
|
| |
Advertise on this site.
| | |
|
