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- In female group, there was no difference for the second premolar, but th... 结论成人上颌快速扩弓不会加速和(或)导致成人牙龈退缩。
- Methods Left mandible(without the second premolar and the first molar)was used for specimen. 方法对缺失的下颌骨进行固定桥修复。
- After treatment the changes of dental arch width in first and second premolar region were larger than that of cuspid and first molar regions. 上颌第一、二双尖牙间各自宽度较尖牙间、一磨牙间宽度增加显著。
- This 40-year-old male suffered from inconvenience when eating due to the absence of the lower right first molar and second premolar. 本文报告一位40岁的男性病例，主诉右下后方缺牙导致吃东西不便。
- With three different retainer designs, the retainer on the second premolar and the first molar exerted the smallest stress on the abutment and its periodontal tissue, while the retainer on the first premolar and the first molar had the largest stress. 在3种不同的固位体设计方式中，固位体放置在第二前磨牙与第一磨牙之间时，基牙及牙周组织受力最小；固位体放置在第一前磨牙与第一磨牙上，基牙与牙周组织受力最大。
- This article presents a 13-year-old female patient with an impacted maxillary second premolar which is incomplete root formation.The impacted tooth was surgically repositioned to normal occlusion. 本文报告一位13岁女性患者利用手术移位的方式将牙根尖尚未发育完全的上颚第二小臼齿直接移到正常的咬合位置。
- Absence of more than two first premolars or absence of a first and a second premolar. 缺少超过两个第一前臼齿或者一个第一和一个第二前臼齿。
- Mandibular left second premolar tooth 下颌左第二前磨牙
- Mandibular right second premolar tooth 下颌右第二前磨牙
- Maxillary left second premolar tooth 上颌左第二前磨牙
- Maxillary right second premolar tooth 上颌右第二前磨牙
- Methods Microscrew implants were implanted below the mandibular first and second premolars of four Beagle dogs as anchorage to intrude the teeth. 目的研究国产微螺钉种植体支抗压低磨牙过程中种植体-骨界面结合状况及种植体稳固度。
- Loading by condition 1, the second premolars were moved buccally.Loading by condition 2, the mesial side was rotated bucccally and the distal side was rotated lingually. |5在工况1作用下整体颊向移动，在工况2作用下近中颊向远中舌向扭转，且整体受力大于工况1；
- He singled and went to second on a passed ball. 他击出一垒打，再因对方漏接而跑上二垒。
- The runner went to second base on a wild pitch. 一记瞎设让跑垒员跑上了第二垒。
- It travels thousands of miles per second. 它一秒钟能走几千英里。
- The second snub settled his hash. 第二次碰壁使他不敢再找麻烦了。
- The second term commences in March. 第二学期自三月开始。
- He kicked the car down from third to second. 他把汽车排档从3档降为2档。
- Her second novel was taken apart by the critics. 她的第二部小说受到评论家的严厉批评。
