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- As early as 4 months, the first primary, or baby teeth, to erupt through the gums are the lower central incisors, followed closely by the upper central incisors. 最早在4个月的时候，首先萌出的是下颌第一乳切牙，紧接着萌出的是上颌中切牙。
- With the loss of the alveolar height, the maximum equivalent stress and the principle stress of the upper central incisor periodontium increased. 随着牙槽骨高度的降低，上中切牙牙周膜最大等效应力和主应力逐渐增大。
- The results of our investigation were as follows: the lower second molars had the highest percentage of caries followed by the upper central incisors in the deci-duous teeth. 其结果如下：在每个年龄层，龋齿在上颚比下颚多，而下颚孚牙第二大臼齿龋率最高，其次是上颚孚牙中切齿。
- Methods:Surgical exposures were made in 11 cases of the inversely impacted upper central incisors(2 with denta lyst).Treatments were performed under the protection of “U”. 方法：对11例倒置埋伏阻生的上中切牙(2例含牙囊肿)，先行手术开窗显露牙冠，然后在“U”型保护罩的支持下用活动或固定正畸技术进行矫治。
- As early as 4 months, the first primary, or baby, teeth to erupt through the gums are the lower central incisors, followed closely by the upper central incisors. 最早在4个月大时，第一颗乳齿或婴儿齿开始从牙龈突出的是下面中间的门牙，紧跟著的是上面中间的门牙。
- METHODS: Spiral CT (SCT) scanning technology, digital image transfer and transcription were used to obtain the initial 3-D data of the upper central incisor. 方法：采用螺旋CT扫描、数字影像传输与转录方法，获得中切牙三维形态的原始数据。
- RESULTS: With the loss of the alveolar height, the maximum equivalent stress and the principle stress of the upper central incisor periodontium increased. 结果：随着牙槽骨高度的降低，上中切牙牙周膜最大等效应力和主应力逐渐增大。
- In spite of the moderate size of the diastema, the analysis of the length and of the width of the upper central incisors demonstrated an unfavorable proportion for its closure with composite resins. 尽管牙间隙的大小只是中度，但分析显示：复合树脂关闭间隙后，上中切牙的长宽比例会不协调。
- Using internal live stain technique in ceramometal restorations to re store the color of upper central incisors 金属烤瓷内染色技术再现上颌中切牙色彩
- An in vitro study of two different cements'influence to the fracture resistance of upper central incisors restored with post-and-core systems 两种桩核粘接剂对离体上中切牙折裂强度影响的研究
- A study on the regularity of center of rotation in the orthodontic treatment of embedded and inverted impact upper central incisor 埋伏倒置上中切牙导萌正畸中旋转中心变化规律的研究
- Upper central incisors 上颌中切牙
- Methods:Specimens were obtained from patients who suffered from dental traumas and the upper primary central incisors cannot be kept. 方法:取外伤后无法保存的上颌乳中切牙作为标本,运用扫描电镜技术进行形态学观察。
- Mesial tipping occurred in all teeth except the upper second molars, the lower central incisors, and the lower lateral incisors. 测量牙冠舌侧近远心倾斜与颊舌侧斜角度，结果显示，上颚除第二大臼齿以外，其他牙齿皆为近心倾斜，最大近心倾斜为犬齿。
- Methods: The models of 3-dimensional finite element analysis (3-D FEA) of left upper permanent central incisor were designed by microtomy.Comparative studies of stress distribution were carried out. 方法： 采用切片法建立上颌左侧恒中切牙的三维有限元模型，研究3种瓷贴面复合体的应力分布。
- The case was a 12 years old girl with an impacted maxillary right canine and a supernumerary tooth located in between two central incisors. 本文介绍一位12岁的女孩病例，临床检查发现上颚犬齿阻生以及门齿间一颗多生牙。
- A clinical examination revealed a moderate midline diastema between maxillary central incisors. 临床检查：上中切牙间中缝，中度大小。
- The case was a12 years old girl with an impacted maxillary right canine and a supernumerary tooth located in between two central incisors. 本文介绍一位12岁的女孩病例，临床检查发现上颚犬齿阻生以及门齿间一颗多生牙。
- Conclusions:The inversely impacted central incisors in the maxillae could be aligned by orthodontic operation.The teeth need not be extracted. 结论：倒置埋伏阻生的上颌中切牙，通过手术和正畸技术，完全能排入正常牙列，不需拔除。
