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Tmj Quiz

Bruxism temporomandibular joint disorder TMJ causes symptoms pathology

When people are stressed, they sometimes clench their jaw and grind their teeth, which is called bruxism, and this can happen day or night, sometimes lasting a few days, and other times going on for months, and it’s usually that longterm grinding that can really cause problems. Grinding the top and bottom teeth together can lead to something called dental abfraction—a loss of tooth structure, and dental attrition, which is when the biting surfaces of teeth get flattened out. Eventually this can wearaway the protective outer surface of the tooth—the enamel, to.

Reveal the much more sensitive dentin below, resulting in tooth hypersensitivity and an increased risk of cavities. When it’s severe, bruxism can even cause a tooth fracture, tooth loosening, and even the loss of teeth, as well as damage any existing dental work like crowns and fillings. Occasionally, people with bruxism bite their tongue as well, which can lead to crenated or scalloped tongue—tooth shaped indentations on the tongue, and they sometimes they have canker sores from chewing their lips and inner cheeks. Bruxism can also lead to temporomandibular joint disorder, or TMJ, which involves the.

Muscles that help with chewing—the temporalis, masseter, and pterygoid muscles. All three of these work together to move the mandible, or the jawbone. Clenching these muscles over and over can be tiring and painful especially in the preauricular area, which is right in front of the ear and cause headaches around the temples of the head. Bruxism can also lead to inflammation of the periodontal ligaments, which are the tiny ligaments that attach each tooth to the bony socket that they are nestled in, making chewing quite painful.

Finally, over time, from the repeated clenching, chewing muscles can hypertrophy or grow, which only worsens the grinding action by making it more powerful and therefore more painful. Bruxism is an unconscious behavior, and when it happens at night, it’s called “sleep bruxismâ€� or “nocturnal bruxismâ€�. Typically, sleep bruxism is noticed by family or friends, who hear the clicking and grinding sounds that the person makes as they grind their teeth and move their jaw while sleeping. Night bruxism can leave a person feeling a dull, persistent headache and sore jaws when they wake up, both of which might slowly improve throughout the day.

For awake or “diurnalâ€� bruxism, there are a couple key differences. First, people don’t feel jaw pain upon waking, but instead their pain worsens throughout the day. Second, they don’t usually make grinding and clicking noises like in sleep bruxism. And third, awake bruxism is more strongly associated with stress, and is often accompanied by other behaviors like biting the inner cheeks and nails. Bruxism is caused by a variety of things. First, some evidence points to it being caused by improperly aligned teeth, which results.

In irregular contact between the upper and lower teeth. Other clues point to other cause like stress, dehydration, medication side effects, and use of recreational drugs like such as MDMA, commonly known as ecstasy. Treatment for bruxism can take a lot of forms. For awake bruxism, one therapy involves behavior modification to help someone gain conscious control over the behavior. For example, someone might learn to notice when they are clenching their jaw, and then intervene by placing the tip of their tongue between their top and bottom teeth as a reminder.

To unclench. For sleep bruxism, treatments usually focus on minimizing the damage that clenching and grinding can have on the teeth and the jaw. Mouth guards, occlusal splints, and removable dental plates are worn at night and help to keep the top and bottom teeth separated. In more serious cases, muscle relaxants and even oralsurgery might be needed to help reduce and repair the damage from bruxism. There are also a number of lifestyle modifications that can help as well, like avoiding certain.

Function of the Lateral Pterygoid Muscle Human Anatomy Kenhub

Hello again! It’s Matt from Kenhub, and in this tutorial, we will discuss the function of the lateral pterygoid muscle. The pterygoid muscles or wing muscles are two jaw muscles located on the inner surface of the mandible. One is called the medial pterygoid, and the other is the lateral pterygoid, which you see highlighted in green and will be our topic of discussion. The lateral pterygoid muscle has two heads, which lie almost horizontally to each other. The small superior head runs from the infratemporal crest of the sphenoid to the articular disc of the temporomandibular joint. The much larger inferior head courses from the pterygoid process.

Of sphenoid to the condylar process of mandible. Due to its anatomy, palpation of the lateral pterygoid is quite difficult. This muscle is innervated by a nerve with the same name, the lateral pterygoid nerve, which branches out from the mandibular nerve. The pterygoid muscles are muscles of mastication and serve the movement of the temporomandibular joint, seen here highlighted in green. The lateral pterygoid differs from the other three muscles of mastication as it is the only one among then that can open the jaw.

Once the lateral pterygoid opens the jaw, the movement is, then, continued with the help of the suprahyoid muscles. The bilateral activation of the lateral pterygoid also causes protrusion whereas the unilateral contraction moves the mandible laterally, which causes laterotrusion and, this way, supports chewing. This tutorial is more fun than reading a textbook, right? If you want more tutorials, interactive quizzes, articles, and an atlas of human anatomy, click on the “Take me to Kenhub� button. It is time to say goodbye to your old textbooks and say hello to your new anatomy learning partner, Kenhub!.

See you there! kenhub .

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