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Proceedings Paper

Laser debonding of ceramic orthodontic brackets: a theoretical approach
Author(s): Kristine L. Kearney; Roy D. Marangoni; Jeff L. Rickabaugh
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Paper Abstract

Ceramic brackets are an esthetic substitute for conventional stainless steel brackets in orthodontic patients. However, ceramic brackets are more brittle and have higher bond strengths which can lead to bracket breakage and enamel damage during debonding. It has been demonstrated that various lasers can facilitate ceramic bracket removal. One mechanism with the laser is through the softening of the bracket adhesive. The high energy density from the laser on the bracket and adhesive can have a resultant deleterious thermal effect on the pulp of the tooth which may lead to pulpal death. A theoretical computer model of bracket, adhesive, enamel and dentin has been generated for predicting heat flow through this system. Heat fluxes at varying intensities and modes have been input into the program and the resultant temperatures at various points or nodes were determined. Further pursuit should lead to optimum parameters for laser debonding which would have minimal effects on the pulp.

Paper Details

Date Published: 1 June 1992
PDF: 12 pages
Proc. SPIE 1643, Laser Surgery: Advanced Characterization, Therapeutics, and Systems III, (1 June 1992); doi: 10.1117/12.137379
Show Author Affiliations
Kristine L. Kearney, Univ. of Pittsburgh (United States)
Roy D. Marangoni, Univ. of Pittsburgh (United States)
Jeff L. Rickabaugh, Univ. of Pittsburgh (United States)


Published in SPIE Proceedings Vol. 1643:
Laser Surgery: Advanced Characterization, Therapeutics, and Systems III
R. Rox Anderson, Editor(s)

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