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The work done by an external force on a particle changes its kinetic energy. However, internal forces must also be considered for a system of interacting particles. The potential energy formulation helps formulate the effect of internal forces. The net work done by an external force can be written in terms of the total change of mechanical energy, which includes both kinetic and potential energies.
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[External cervical root resorption].

C J Warnsinck, H Shemesh

    Nederlands Tijdschrift Voor Tandheelkunde
    |February 21, 2018
    PubMed
    Summary

    External cervical root resorption starts on the root surface and progresses over time. Early diagnosis and treatment planning are crucial for managing this condition.

    Area of Science:

    • Dentistry
    • Oral Pathology

    Background:

    • External cervical root resorption (ECRR) originates at the root surface due to odontoclastic activity.
    • The pulp is affected in later stages; etiology and pathogenesis are not fully understood.
    • Potential predisposing factors include orthodontic treatment, trauma, internal bleaching, cemento-enamel junction damage, bruxism, and hypoxia.

    Purpose of the Study:

    • To summarize the understanding of external cervical root resorption.
    • To highlight diagnostic methods and treatment considerations.

    Main Methods:

    • Literature review on external cervical root resorption.
    • Discussion of clinical and radiographic signs.
    • Emphasis on Cone-Beam Computed Tomography (CBCT) in diagnosis.

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    Main Results:

    • A 'pink spot' can be an early clinical sign.
    • Two-dimensional radiographs often show ill-defined radiolucencies.
    • CBCT is valuable for diagnosis, prognosis, and treatment planning.

    Conclusions:

    • ECRR is a progressive condition with multifactorial etiology.
    • Accurate diagnosis, aided by CBCT, is essential for effective treatment.
    • Treatment approach (external or internal) depends on defect size.