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Bond Strength of an Amorphous Calcium Phosphate–Containing Orthodontic Adhesive
The Angle Orthodontist
  • Jeff A. Foster, Marquette University
  • David W. Berzins, Marquette University
  • T. Gerard Bradley, Marquette University
Document Type
Format of Original
6 p.
Publication Date
The E. H. Angle Education and Research Foundation Inc.
Original Item ID
doi: 10.2319/020807-60

Objective: To determine whether an amorphous calcium phosphate (ACP)-containing adhesive has an acceptable level of shear bond strength to be used as an orthodontic adhesive.

Materials and Methods: Sixty extracted premolars were randomly divided into three groups for orthodontic bonding. Group 1 used a composite resin adhesive (Transbond XT), group 2 was bonded with an ACP-containing adhesive (Aegis Ortho), and group 3 used a resin-modified glass ionomer (Fuji Ortho LC). All bonded teeth were stored in distilled water at 37°C for 40 ± 2 hours prior to debonding. Shear bond strength and adhesive remnant index (ARI) were recorded for each specimen.

Results: The mean shear bond strengths for the three test groups were: group 1 (15.2 ± 3.6 MPa), group 2 (6.6 ± 1.5 MPa), and group 3 (8.3 ± 2.8 MPa). A one-way analysis of variance showed a significant difference in bond strengths between the groups. A post hoc Tukey test showed group 1 to be significantly (P < .001) greater than groups 2 and 3. A Kruskal-Wallis test and a Mann-Whitney U-test showed groups 1 and 3 exhibited lower ARI scores than group 2, but a majority of specimens in each group had greater than 50% of the cement removed along with the bracket during debonding.

Conclusions: The ACP-containing adhesive demonstrated a low, but satisfactory bond strength needed to function as an orthodontic adhesive.


Published version. The Angle Orthodontist, Vol. 78, No. 2 (March 2008): 339-344. DOI. © 2008 The E. H. Angle Education and Research Foundation Inc. Used with permission.

Citation Information
Jeff A. Foster, David W. Berzins and T. Gerard Bradley. "Bond Strength of an Amorphous Calcium Phosphate–Containing Orthodontic Adhesive" The Angle Orthodontist (2008) ISSN: 0003-3219
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