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Related Experiment Videos

Rationale and methods for crown lengthening.

F Palomo, R A Kopczyk

    Journal of the American Dental Association (1939)
    |February 1, 1978
    PubMed
    Summary
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    Surgical crown lengthening is not advised for tooth fractures extending into the middle root third. This procedure can lead to complications like tooth mobility and increased pocket depth, suggesting extraction may be better.

    Area of Science:

    • Dentistry
    • Periodontology
    • Oral Surgery

    Background:

    • Surgical crown lengthening is a common dental procedure.
    • Fracture extension into the root impacts treatment options.
    • Assessing risks versus benefits is crucial for patient outcomes.

    Purpose of the Study:

    • To evaluate the contraindications for surgical crown lengthening.
    • To identify potential complications associated with the procedure in specific fracture cases.
    • To provide guidance on alternative treatments when crown lengthening is inadvisable.

    Main Methods:

    • Review of clinical scenarios involving tooth fractures and crown lengthening.
    • Analysis of potential sequelae, including bone reduction and soft tissue response.

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  • Evaluation of factors such as crown-root ratio, prognosis, and esthetics.

    • Main Results:

    • Surgical crown lengthening is contraindicated when tooth fractures reach the middle third of the root.
    • Excessive bone reduction can cause tooth mobility and furcation involvement.
    • Unfavorable osseous changes may lead to increased periodontal pocket depth.

    Conclusions:

    • Crown lengthening should be avoided in cases with hopeless prognosis or risk of poor crown-root ratio, mobility, furcation involvement, or esthetic compromise.
    • Extraction may be the indicated treatment for severe root fractures where crown lengthening is not feasible.
    • Careful case selection is essential to prevent adverse outcomes following surgical crown lengthening.