Abstract
Myasthenia gravis (MG) is an autoimmune neuromuscular disorder, which is characterized by skeletal muscle weakness and fatigability. Medication, stress and infection is related to dental treatment that may result in exacerbation of their symptoms and the most serious clinical manifestation being myasthenic crisis.
We had experienced 4 cases of teeth extractions of patients with MG. The teeth extractions were performed under local anesthetics using 1% lidocaine with 1: 100, 000 epinephrine in an operating room equipped with respiratory support.
In one of the 4 cases, exacerbations of muscular weakness, ptosis and extremity weakness following teeth extractions developed. For the 29-year-old female patient whose clinical classification of MG was class III b, one mandibular third molar and two maxillary third molars were simultaneously extracted. This case suggested importance of clinical classifications of MG in dental treatment.
