overjet

Non-extraction treatment of Class ⅱ division 1 malocclusion with deep overjet

安氏Ⅱ类1分类Ⅲ度深覆盖错？的非拔牙矫治

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Cases obtained normal overjet and overbite and molar relationship.

其中，9例患者前牙达到正常覆牙合、覆盖关系，磨牙中性关系，2例患者前牙达到浅覆牙合、浅覆盖关系，后牙中性偏近中关系。

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The key point is how to open bite quickly and effectively and improve the overjet relationships.

如何快速而有效的打开咬合，减少覆盖是矫治成功的关键，也是矫治的难点。

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The good relationship between lips and teeth, normal overbite and overjet are vital goals which orthodontists pursuit.

前牙良好的唇齿关系和覆牙合、覆盖是口腔正畸医生追求的目标之一。

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Conclusion: Soft diet, decreasing of eating time and the malocclusion of teeth malposition, crowded, overjet and so on had important effects on the oral health of primary school students. Which also were the relative factors of positive rate of salivary occult blood.

结论：软质饮食、就餐时间的减少及牙齿错位、拥挤、深覆盖等错（牙合）畸形均为影响小学生口腔健康的重要因素，是唾液隐血阳性的相关因素。

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The research of Orthodontic therapy in second molar overjet

正畸矫治第二恒磨牙深覆盖的研究

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Analysis of Root Absorption in Treatment of Angle's ⅱ~ 1 Overjet of Different Ages

不同年龄安氏Ⅱ~1类正畸治疗后牙根吸收的分析

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Results Compared with patients with normal overjet,(?)

结果与正常覆盖组相比，I度深覆盖组患者的（？）

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Increased height of anterior maxillary anterior alveolar process was the compensatory change in skeletal class ⅰ patients with excessive overjet.

上颌前部牙槽高度增加可能是I类骨面型深覆盖的代偿性变化。

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The overjet and chewing time were the important factors influencing masticatory efficiency.

深覆盖及咀嚼次数是影响咀嚼效能的重要因素。

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