[Changes in the masticatory system in myasthenia gravis]

Area of Science:

• Neurology
• Dentistry
• Rheumatology

Background:

• Myasthenia gravis is characterized by muscle hypofunction and motor dyscoordination.
• The oral health implications of myasthenia gravis, particularly concerning periodontal health and caries, require further investigation.
• Temporomandibular joint (TMJ) damage is a potential consequence of the motor dyscoordination associated with myasthenia gravis.

Purpose of the Study:

• To examine the oral health consequences of myasthenia gravis in a patient cohort.
• To investigate the relationship between muscle hypofunction, motor dyscoordination, and dental caries.
• To assess the diagnostic utility of Tensilon therapy in evaluating TMJ function in myasthenia gravis patients.

Main Methods:

• A cohort of 106 patients diagnosed with myasthenia gravis was studied.
• Dental caries intensity and periodontal status were assessed.
• TMJ function, including mouth opening and masticatory force, was evaluated before and after Tensilon administration.

Main Results:

• Muscle hypofunction in myasthenia gravis did not directly correlate with periodontal issues.
• A significant increase in dental caries intensity was observed in patients with myasthenia gravis.
• Tensilon therapy demonstrated a characteristic increase in mouth opening and masticatory force, proving useful for diagnosis.

Conclusions:

• Myasthenia gravis is associated with increased dental caries risk, despite no direct impact on periodontal health.
• Motor dyscoordination resulting from muscle hypofunction can lead to TMJ damage.
• Tensilon-induced improvements in jaw function serve as a valuable diagnostic marker for myasthenia gravis.