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Cement distribution and bond strength in cemented posts.

M Goldman, R DeVitre, J Tenca

    Journal of Dental Research
    |December 1, 1984
    PubMed
    Summary
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    Using a lentulo spiral to place cement in post preparations significantly improves cement distribution and tensile strength compared to coating the post alone. This method enhances post cementation in dental procedures.

    Area of Science:

    • Dental Materials Science
    • Prosthodontics
    • Biomaterials Engineering

    Background:

    • Effective cementation of posts is crucial for the longevity of endodontically treated teeth.
    • Traditional post cementation methods may lead to uneven cement distribution and compromised bond strength.

    Purpose of the Study:

    • To compare the cement distribution and tensile strength of two post cementation techniques.
    • To evaluate the effect of different irrigating solutions on post cementation outcomes.

    Main Methods:

    • Lucite rods and extracted teeth were used to simulate post preparations at varying depths.
    • Posts were cemented using either post-coating or lentulo spiral cement application.
    • Cement distribution was assessed photographically.

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  • Tensile strength was measured in four experimental groups with different irrigation protocols (sodium hypochlorite and EDTA).

    • Main Results:

    • The lentulo spiral technique resulted in more even cement distribution throughout the post preparation.
    • Cementation using the lentulo spiral demonstrated increased tensile strength compared to the post-coating method.
    • The use of EDTA in conjunction with sodium hypochlorite aimed to remove the smear layer, potentially influencing the dentin-cement interface.

    Conclusions:

    • Applying cement with a lentulo spiral is a superior method for achieving better cement distribution and higher tensile strength in post cementation.
    • The findings support the use of the lentulo spiral technique for improved clinical outcomes in post and core restorations.