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Related Experiment Videos

Appliance breakages.

W J Kerr

    British Journal of Orthodontics
    |July 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Dental appliance breakages are common, with acrylic parts fracturing more often than wires. Patient carelessness and material issues contribute significantly to these frequent dental device failures.

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    Area of Science:

    • Dental materials science
    • Biomaterials engineering
    • Orthodontic appliance research

    Background:

    • Dental appliances, particularly those with acrylic components, are prone to fracture.
    • Understanding breakage patterns is crucial for improving appliance longevity and patient compliance.

    Purpose of the Study:

    • To analyze the frequency and causes of dental appliance breakages over a 12-month period.
    • To identify specific components and patient behaviors associated with higher breakage rates.

    Main Methods:

    • A 12-month survey was conducted to record dental appliance breakages.
    • Data collected included the type of appliance, fractured component, and circumstances of breakage.
    • Patient factors, including persistent offenders and in-care breakages, were analyzed.

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    Main Results:

    • Acrylic baseplates and bite planes fractured more frequently (57%) than wire elements (43%).
    • Approximately 20% of new appliances fitted during the period were broken.
    • Over half of breakages were by repeat offenders, and 31% occurred when appliances were out of the mouth.

    Conclusions:

    • Inadequate acrylic resin properties and patient carelessness are primary causes of dental appliance failure.
    • Strategies to improve material quality and patient education are needed to reduce breakage rates.