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口腔颌面部肌功能因素对牙面发育及形态学的影响,日益受到重视。最近的实验室和临床证据显示,除遗传因素影响外,颌骨和牙齿的发育明显受到局部环境因素的影响。例如口腔不良习惯、舌休息位、吞咽方式等均对牙面的生长发育产生作用。口呼吸是一种重要的肌功能因素,口呼吸儿童常表现为开口位、鼻扁平、鼻孔小且发育差、上唇短下唇丰满以及上颌切牙前突、上颌牙弓V形狭窄伴腭盖高拱、骨性Ⅱ类关系、后牙反(牙合),开(牙合)倾向等。过去认为口呼吸是鼻呼吸障碍的
Oral and maxillofacial function factors on the growth and morphology of the tooth surface, more and more attention. Recent laboratory and clinical evidence shows that in addition to genetic factors, the development of jaws and teeth is significantly affected by local environmental factors. For example, bad oral habits, tongue rest, swallowing, etc. have a role in the growth and development of the tooth surface. Mouth breathing is an important muscle function factor, mouth breathing children often showed open mouth, flat nose, small nostrils and poor development, upper lip short lip fullness and maxillary incisors, maxillary arch V-shaped stenosis with palatal cover High arch, skeletal Class Ⅱ relationship, anti-back teeth (occlusion), open occlusion tendency. In the past that mouth breathing is nasal respiratory disorders