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What are the two conditions that can occur when there is interference between the maxillary and mandibular teeth during closure?

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Final answer:

The two main conditions that can occur with interference between the maxillary and mandibular teeth during closure are Dislocation of the Temporomandibular Joint (when the jaw opens too wide) and Temporomandibular Joint Disorder (characterized by pain, difficulty chewing and sometimes lockjaw due to various causes such as arthritis, wearing of cartilage, etc.).

Step-by-step explanation:

The two main conditions that occur due to interference between the maxillary and mandibular teeth during closure are Dislocation of the Temporomandibular Joint (TMJ) and Temporomandibular Joint Disorder.

Dislocation of the TMJ generally happens when the mouth is opened too wide, such as when taking a large bite or after a blow to the jaw, causing the mandibular condyle to move anterior to the articular tubercle. In this situation, one would not be able to close their mouth.

On the other hand, Temporomandibular Joint disorder is a painful condition that might on account of arthritis, wearing away of the articular cartilage covering the bony surfaces of the joint, muscle fatigue from overuse, teeth grinding, harm to the articular disc within the joint, or a jaw injury. Its symptoms include a headache, difficulty chewing, or an inability to move the jaw (lock jaw). The treatments for this condition include pharmacologic agents for pain and other therapies like bite guards.

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