Effect of debonding forces on bonded orthodontic brackets: finite element study

Article type: Research Article

Authors: Lewis, Gladius^; | Manickam, Saravanakumar | Wharton, Darrison

Affiliations: Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA | Department of Biomedical Engineering, The University of Memphis, Memphis, TN 38152, USA

Note: [] Corresponding author. Please address request for reprints also to Dr. Gladius Lewis.

Abstract: The finite element analysis method was used to obtain values of the von Mises equivalent stress (SEQV) at selected locations within the adhesive layer of two-dimensional models of bonded orthodontic brackets. In all, 39 model cases were analyzed involving 4 overall bracket configurations, 3 combinations of materials of fabrication of the bracket, 3 types of debonding forces and 4 adhesives. The results are presented to show the sensitivity of SEQV to each of the parameters studied. Comments are made on the usefulness of the results in the development of a standard protocol for experimental determination of the bond strength of adhesives used in securing orthodontic brackets.

Keywords: Orthodontic bracket, debonding, adhesive layer, finite element stress analysis

DOI: 10.3233/BME-1996-6205

Journal: Bio-Medical Materials and Engineering, vol. 6, no. 2, pp. 113-121, 1996