摘要：目的 进行儿童口腔不良生活习惯造成错牙合畸形原因和预防措施进行探讨。方法 针对口腔不良习惯造成错牙合畸形患者开展问卷调查，并对结果进行分析。结果 乳牙期儿童不良口腔习惯主要是吮指，比例为43.30%；替牙期儿童不良口腔习惯主要是舌习惯、吮指，比例为23.40%、22.00%；恒牙期儿童不良口腔习惯主要是偏侧咀嚼，比例为17.40%。188例患者中主要不良习惯包括吮指、偏侧咀嚼、唇习惯，比例分别为23.40%、20.20%、14.90%。Ⅰ类畸形、Ⅱ类畸形、Ⅲ类畸形比例为64.90%、16.00%、19.10%。结论 儿童不良口腔习惯造成错牙合畸形主要是Ⅰ类畸形，通过早期纠正儿童偏侧咀嚼、吮指、唇习惯，能够有效预防错牙合畸形。

    关键词：口腔不良习惯；儿童；错牙合畸形；预防

    Abstract：Objective To investigate the cause and prevention of malocclusion in children with poor oral life.Methods A questionnaire survey was conducted on patients with malocclusion due to poor oral habits，and the results were analyzed.Results The poor oral habits of children in deciduous period were mainly sucking ......