INBDE (Integrated National Board Dental Examination) Practice Exam

What is the most common cause of masticatory pain?

1. Dental caries

2. Myofascial pain syndrome

3. Gum disease

4. Sinusitis

The correct answer is: Myofascial pain syndrome

Masticatory pain refers to pain in the muscles involved in chewing, such as the jaw muscles. While dental caries (tooth decay) can certainly cause masticatory pain, it is not the most common cause. This is because dental caries can also present with other symptoms, such as toothache or sensitivity, and may not always cause masticatory pain. Likewise, gum disease can cause discomfort in the mouth and jaw, but it is not generally the main cause of masticatory pain. Sinusitis is inflammation or infection of the sinus cavities and can cause pain in the upper teeth and face, but it is not considered a common cause of masticatory pain. Similarly, while sinusitis can cause pain in the jaw, this is usually due to referred pain and not a primary cause of masticatory pain. The most common cause of masticatory pain is myofascial pain syndrome, which is a chronic condition where muscles in the jaw, neck, and face become tender or painful without any apparent reason. This can be due to overuse, poor posture, or stress, among other factors. Therefore, it is important to consider myofascial pain syndrome as a common cause of masticatory