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

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Trismus after injection of local anesthetic

  • Jeffrey Stone
    Footnotes
    Affiliations
    Boston, Mass. USA
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  • Leonard B. Kaban
    Correspondence
    Reprint requests to: Dr. Leonard B. Kaban Peter Bent Brigham Hospital 721 Huntington Ave. Boston, Mass. 02115
    Footnotes
    Affiliations
    Boston, Mass. USA
    Search for articles by this author
  • 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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      Abstract

      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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