Teeth grinding occurs across all age groups, though it is generally more common in children. The primary manifestation of childhood teeth grinding is the unconscious clenching of teeth that produces a "grinding" sound during deep sleep, though it may occasionally occur while awake.Teeth grinding may occur continuously or intermittently. So what causes children to grind their teeth while sleeping?
1. Intestinal parasites, particularly roundworms, survive by absorbing nutrients from the human body. Their activity within the abdomen can cause abdominal pain, nausea, vomiting, and in severe cases, intestinal obstruction. Additionally, they may sometimes trigger nighttime teeth grinding.
2. Excessive daytime fatigue or mental agitation, especially when children play to exhaustion, prevents the cerebral cortex from fully resting during sleep. Persistent neural excitation can trigger nocturnal teeth grinding.
3. Gastrointestinal disorders, pediatric intestinal parasitic infections, and endocrine imbalances may all contribute to bruxism.
4. Habitual chewing of bubble gum, tobacco, or toothpicks can eventually lead to unconscious teeth grinding.
5. Intestinal parasites like roundworms reside in the small intestine. These parasites not only steal nutrients but also irritate the intestinal wall and secrete toxins, causing indigestion.Persistent abdominal discomfort in children can lead to insomnia, irritability, and nighttime teeth grinding. Additionally, pinworms can cause teeth grinding. Pinworms typically reside in the large intestine. After a child falls asleep, they crawl to the anus to lay eggs, causing anal itching that disturbs sleep and triggers teeth grinding.
6. Overeating at dinner Eating too much at dinner or having a late-night snack not only hinders nutrient absorption but also burdens the gastrointestinal tract. When the body rests, undigested food remains in the digestive system, forcing it to work overtime. This continuous activity can even activate the chewing muscles, causing involuntary contractions that lead to teeth grinding.
7. Vitamin D deficiency Children with rickets experience calcium and phosphorus metabolism disorders, leading to bone decalcification, muscle aches, and autonomic nervous system dysfunction. This often manifests as excessive sweating, night terrors, restlessness, and nocturnal teeth grinding.
8. Gastric indigestion. When the stomach's digestive function is impaired due to conditions like gastritis, it cannot effectively break down food, leading to teeth grinding during sleep.
9. Malocclusion or misaligned bite.
10. During periods of emotional tension, improper bite alignment often triggers bruxism. For instance, when teeth make premature contact, individuals may attempt to grind away uncomfortable tooth surfaces or cusps. If this occurs frequently over time, it can develop into persistent bruxism.
11. A small number of children who do not normally grind their teeth may develop nocturnal bruxism if they hear a thrilling story before bedtime or watch a frightening or tense TV show or cartoon. This occurs because their nervous system becomes overly excited. Another cause is stress, such as difficulty adjusting to kindergarten life, fear of a classmate, or arguments with parents or family members. These situations can cause mental tension, leading to teeth grinding during sleep.Additionally, some hyperactive children may also experience nighttime teeth grinding.
12. Misaligned teeth, excessive force from the chewing muscles, long-term chewing on one side, or poor bite alignment can cause temporomandibular joint dysfunction, which may also lead to nighttime teeth grinding.Moreover, children with misaligned teeth often have abnormal positioning of their chewing muscles. During sleep, these muscles may contract involuntarily, triggering teeth grinding.
13. Poor sleeping posture. If a child frequently sleeps with their head tilted to one side, it can cause uneven tension in the chewing muscles. The compressed side may experience abnormal contractions, leading to teeth grinding. Sleeping with the head covered at night can also cause teeth grinding due to excessive carbon dioxide buildup and insufficient oxygen supply.