Comparison of mechanical properties of ceramic and MZ100 composite brackets
Date
2006
DOI
Authors
Addiego, Domenico
Version
OA Version
Citation
Abstract
With so many advancements in material science and dental technology, finding a more economical product with comparable or even superior mechanical properties and esthetics becomes the goal. No study exists in which indirect composite material is used to fabricate orthodontic brackets.
Purpose: The aim of this study is to fabricate an orthodontic bracket from Paradigm MZ100 (3M/ESPE, St. Paul, MN) and compare the mechanical properties to those of conventional ceramic brackets.
Materials and Methods: Using a ceramic bracket template, a Celay instrument (Mikrona, Spreitenbach, Switzerland) was employed to fabricate forty orthodontic brackets from Paradigm MZ100. Ten specimens, constituting four groups (n=10), were subjected to four invitro tests: 3 point flexure, shear load, and resistance to second order (tipping) and third order (torsional) activations. The average moments necessary to fracture the brackets in each test was determined and compared to those of four types of commercially available alumina ceramic brackets tested in the same manner with equivalent sample sizes. An invitro static fatigue test was also performed on MZ100 brackets only. 26 brackets were subjected to static torque loads equivalent to 100% (n=10), 95% (n=10), 90% (n=3), and 80% (n=3) of the mean torque fracture value. The time until bracket failure was recorded.
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Description
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Thesis (MSD)--Boston University, Goldman School of Dental Medicine, 2006.
Includes bibliographic references : leaves 57-59.
Thesis (MSD)--Boston University, Goldman School of Dental Medicine, 2006.
Includes bibliographic references : leaves 57-59.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.