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Chronic clenching can also lead to receding gums—which increases tooth sensitivity—as well as cracked roots that require extraction, and, in some cases, limited ability to open the jaw.
In humans, the mandible, or lower jaw, is connected to the temporal bone of the skull via the temporomandibular joint. This is an extremely complex joint which permits movement in all planes. The muscles of mastication originate on the skull and insert into the mandible, thereby allowing for jaw movements during contraction.
It is a temporary condition that usually lasts no more than two weeks. Dental trismus is caused by an injury to the masticatory muscles, such as opening the jaw for an extended period of time or having a needle pass through a muscle. Typical dental anesthesia for the lower jaw involves inserting a needle into or through a muscle.
Of the aesthetic preparations prior to embalming, the closure of the eyes, mouth, and lips are the most aesthetically obvious. There is a distinction between mouth closure and lip closure, the former meaning closure of the jaws, whilst the latter is closure of the lips and ‘setting’ the look of the mouth.
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Oromandibular dystonia is characterized by involuntary spasms of the tongue, jaw, and mouth muscles that result in bruxism, or grinding of the teeth, and jaw closure. These conditions frequently lead to secondary dental wear as well as temporomandibular joint syndrome. In addition, problems with chewing, speaking, and swallowing may result from ...
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