Intrusion in dentistry is a type of orthodontic movement in which the teeth are actively pushed further into the gums, usually to correct malocclusion. This movement typically involves moving the teeth in an upward direction away from the roots. Intrusion may be used to close gaps between teeth or to correct an overbite, and is often used in combination with other orthodontic treatments, such as braces. Intrusion can be performed manually or with the help of a special orthodontic device. While the procedure can be uncomfortable, it is generally safe and effective in correcting malocclusion.