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乳牙滞留是指牙根未吸收或吸收不完全而未能按时脱落的乳牙,乳牙滞留常使继承恒牙萌出受阻或者异位萌出。乳牙滞留多发生于儿童,可见于儿童上颌前牙或下颌前牙会出现双排牙,会导致口腔卫生变差,不利咀嚼,影响美观,未脱落的乳牙可能会占据恒牙长出的位置,不利于恒牙的萌出。乳牙滞留与下列因素有关:乳牙根尖周病,继承恒牙异位生长,继承恒牙萌出无力,饮食习惯,先天性缺牙,遗传因素,全身疾病,部分原因不明。
Deciduous tooth retention refers to the root is not absorbed or incomplete absorption and failed to fall off on time of deciduous teeth, deciduous teeth often make the succession of permanent eruption blocked or ectopic eruption. Defective deciduous teeth occur in children, can be seen in children with maxillary anterior teeth or mandibular anterior teeth will appear double row of teeth, will lead to poor oral hygiene, unfavorable chewing, affecting the appearance of non-shed deciduous teeth may occupy the location of permanent teeth, Not conducive to the eruption of permanent teeth. Deciduous detention and the following factors: Deciduous periodontal disease, ectopic inheritance of permanent teeth, inheritance of eruption of permanent teeth weakness, diet, congenital edentulous, genetic factors, systemic diseases, in part for unknown reasons.