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Stressbreakers and the removable partial denture.

B T Cecconi, G Kaiser, A Rahe

    The Journal of Prosthetic Dentistry
    |August 1, 1975
    PubMed
    Summary
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    Deactivating stressbreakers reduced ridge displacement and abutment tooth movement. Making the pin-Dalbo rigid decreased ridge displacement, while rigidifying the hidden lock reduced tooth movement.

    Area of Science:

    • Dental prosthetics
    • Biomechanics
    • Biomaterials

    Background:

    • Stressbreakers are crucial components in dental prosthetics, designed to mitigate stress on abutment teeth.
    • Understanding the biomechanical behavior of different stressbreaker designs is essential for optimizing prosthetic stability and longevity.

    Purpose of the Study:

    • To investigate the impact of deactivating stressbreakers on abutment tooth mobility and residual ridge displacement.
    • To compare the effects of rigidifying two specific stressbreaker types: Ticonium hidden-lock and pin-Dalbo precision stressbreakers.

    Main Methods:

    • A laboratory study was conducted using Ticonium hidden-lock and pin-Dalbo precision stressbreakers.
    • The 'deactivation' or rigidification of these stressbreakers was systematically tested.

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    Main Results:

    • Rigidifying the pin-Dalbo precision stressbreaker significantly reduced ridge displacement.
    • Rigidifying the Ticonium hidden-lock stressbreaker significantly decreased abutment tooth movement, particularly during bilateral loading.

    Conclusions:

    • The deactivation of stressbreakers can effectively reduce both ridge displacement and abutment tooth movement.
    • The choice of stressbreaker design influences its biomechanical response; rigidifying the pin-Dalbo is beneficial for ridge stability, while rigidifying the hidden lock aids in controlling tooth mobility.