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    • University of Missouri-Kansas City
    • School of Graduate Studies (UMKC)
    • Theses and Dissertations (UMKC)
    • Theses (UMKC)
    • 2012 Theses (UMKC)
    • 2012 UMKC Theses - Freely Available Online
    • View Item
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    Effect of refrigerant spray on orthodontic composite resin-bracket debond strength and associated adhesive remnant index

    Gossett, Lauren Ashley
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    [PDF] Effect of refrigerant spray on orthodontic composite resin-bracket debond strength and associated adhesive remnant index (1.954Mb)
    Date
    2012
    Format
    Thesis
    Metadata
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    Abstract
    This study evaluated effects of refrigerant spray and crosshead speed on orthodontic composite resin shear debond strength and Adhesive Remnant Index (ARI) after bond failure. Orthodontic brackets were bonded to forty paired extracted mandibular third molars. Pairs were divided into experimental and control groups, with and without refrigerant spray prior to debond, respectively. Each group was further divided into two subgroups based on crosshead speed of 1 or 10 mm/min. Bracket shear debond strength was tested with a universal testing machine and ARI scores assessed. Results showed no statistically significant difference for shear debond strength or ARI score as a function of refrigerant spray usage. Statistically significant differences were shown for shear debond strength and ARI score as a function of crosshead speed. As crosshead speed increased, shear debond strength and ARI score both increased. These results indicate that application of refrigerant spray prior to bracket debonding is not beneficial.
    Table of Contents
    Introduction -- Materials and methods -- Results -- Discussion -- Conclusions -- -- Literature cited -- Appendix 1. IRB approval -- Appendix 2. Bracket temperature pilot data -- Appendix 3. Bracket debond time pilot data -- Appendix 4. Bracket composite layer temperature pilot data
    URI
    http://hdl.handle.net/10355/15982
    Degree
    M.S.
    Thesis Department
    Oral Biology (UMKC)
    Collections
    • Dentistry Electronic Theses and Dissertations (UMKC)
    • 2012 UMKC Theses - Freely Available Online

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