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The instinct to suck is a normal physiological behavior performed by almost all infants. When an infant/toddler performs this behavior and no nutrition is obtained it is referred to as non-nutritive sucking (NNS). Generally, non-nutritive sucking decreases with age and a majority of toddlers discontinue between 2- 4 years of age.
Infants and toddlers will commonly utilize a pacifier or one or more digits for NNS. It is important to evaluate the frequency and the duration of this behavior. Digit sucking has been found to cause more severe dental effects than pacifiers because of the strong pressure on the teeth and dental arches. A pacifier with a curved shield that fits under the nose can help disseminate the pressure and can decrease dental effects. Parents should be reminded not to put any sugar-filled liquids on the pacifier.
NNS can affect both the primary and permanent dentitions. Dental effects are minor in children under the age of three years. Dental problems that are commonly associated with prolonged NNS include:
Breaking the habit
Parents and children should be educated about the dental effects of long-term sucking. Positive reinforcement is important for children who actively try to restrain from thumb, digit or pacifier sucking. A dentist should be consulted if the habit continues after eruption of the permanent dentition.
Parents will often report that their child is grinding their teeth and making an irritating noise while doing so. Bruxism is a self-limiting behavior that decreases as the child becomes older and the permanent dentition erupts. Children often experience attrition of the primary dentition and do not experience pain or discomfort. Children with neurological disorders are highly likely to have a bruxing habit that continues throughout their childhood and adulthood. If a child or young adult experiences attrition of the permanent dentition resulting from bruxism the dentist should be consulted regarding the possible fabrication of an occlusal guard.