Research Article| Volume 48, ISSUE 1, P29-32, July 1979

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Trismus after injection of local anesthetic

  • Jeffrey Stone
    Boston, Mass. USA
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  • Leonard B. Kaban
    Reprint requests to: Dr. Leonard B. Kaban Peter Bent Brigham Hospital 721 Huntington Ave. Boston, Mass. 02115
    Boston, Mass. USA
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  • Author Footnotes
    ∗ Formerly Senior Resident in Oral Surgery, Massachusetts General Hospital, and Clinical Fellow in Plastic Surgery, Peter Bent Brigham Hospital; at present Assistant Professor of Oral Surgery, Vanderbilt Medical Center, Nashville, Tenn.
    ∗∗ Assistant Professor of Oral Surgery, Harvard School of Dental Medicine, and Associate in Surgery, Peter Bent Brigham Hospital and Children's Hospital Medical Center.
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      Persistent pain at the site of injection is the most common complication of local anesthesia in the oral cavity. The complication of trismus after local anesthetic injection is rare and may be prevented by the use of short needles for maxillary posterior injections, and by the avoidance of multiple injections in a short period of time. Once trismus develops, its progression to chronic hypomobility and fibrous ankylosis may be prevented by the early institution of treatment consisting of heat, analgesics, muscle relaxants, and exercises.
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        • Kramer H.S.
        • et al.
        Complications of Local Anesthesia.
        Dent. Clin. North Am. 1973; 17: 443-460
        • Benoit P.W.
        Reversible Skeletal Muscle Damage After Administration of Local Anesthetics With and Without Epinephrine.
        J. Oral Surg. 1978; 36: 198-201
        • Benoit P.
        • Belt W.
        Some Effects of Local Anesthetic Agents on Skeletal Muscle.
        Exp. Neurol. 1972; 34: 264
        • Brown A.E.
        Persistent Limitation of Opening Following Inferior Alveolar Nerve Block Injections.
        Br. Dent. J. 1976; 141: 186-190
        • Guralnick W.C.
        • Kaban L.B.
        Surgical Treatment of Mandibular Hypomobility.
        J. Oral Surg. 1976; 34: 343-348
        • Beehuis G.J.
        • et al.
        Trismus: Etiology and Management of Inability to Open the Mouth.
        Laryngoscope. 1965; 75: 1234-1258
        • Kaban L.B.
        • et al.
        Postoperative Physiotherapy Device for Mandibular Hypomobility.
        Oral Surg. 1977; 43: 513-516