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Pressures created by dental injections

E L Pashley, R Nelson, D H Pashley

    Journal of Dental Research
    |October 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Dental clinicians exert significant pressure during injections, with higher pressures observed in less distensible tissues like bone. This study measured maximum injection pressures in simulated dental procedures on dogs.

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    Area of Science:

    • Dentistry
    • Anesthesiology
    • Biomedical Engineering

    Background:

    • Dental anesthetic injections involve delivering solutions into tissues with varying elasticity.
    • Understanding injection pressures is crucial for patient safety and procedure efficacy.

    Purpose of the Study:

    • To quantify maximum injection pressures exerted by clinicians during simulated dental anesthesia in dogs.
    • To correlate injection pressures with the distensibility of different oral tissue sites.

    Main Methods:

    • Utilized regular aspirating dental syringes and dental anesthetic cartridges filled with isotonic saline.
    • Simulated dental injections on canine subjects, measuring maximum operator injection pressures.
    • Recorded pressures across various tissue sites, including interosseous, incisive papilla, periodontal, hard palate, and intrapulpal areas.

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    Main Results:

    • Maximum operator injection pressures ranged from 330 to 660 psi (17,061–34,122 mmHg).
    • Least distensible sites yielded the highest pressures: interosseous (21,559 mmHg), incisive papilla (18,224 mmHg), and periodontal (17,630 mmHg).
    • More distensible sites, such as the hard palate (11,322 mmHg) and intrapulpal (8918 mmHg), showed lower pressures.

    Conclusions:

    • Dental injection pressures vary significantly based on clinician effort and tissue distensibility.
    • Knowledge of these pressure variations is essential for safe and effective local anesthesia administration.
    • The findings highlight the mechanical forces involved in dental injections and their anatomical dependencies.