first molar meaning in English
第一磨牙
六岁磨牙
Examples
- Stress distribution and displacement of transpalatal distraction ostegenesis at the first molar region on the craniofacial complex
第一磨牙处横向牵张成骨对上颌骨复合体应力分布和位移的影响 - Permanent teeth begin appearing around age 6 , starting with the first molars and lower central incisors . this process continues until approximately age 21
恒牙萌出于6岁左右，开始于第一恒磨牙以及下颌第一中切牙。这个过程一直持续到将近21岁。 - Methods : in one mouth , the teeth of one side were as test group , other side as control group , the first molar in non - carious pit and fissure of 500 children were sealed
方法：将500例儿童的第一恒磨牙分为两组，一侧第1恒磨牙为一组，对侧同名牙为第2组。 - The long axises of miniature pigs teeth are 6 . 1 in the upper first molar , 6 . 5 in the lower first molar , 7 . 3 in the upper third premolar , 3 . 8 in the lower third premolar
结论小型猪咀嚼肌的形态、起止点、肌力方向都与人类有较大的相似性；第三前磨牙与第一磨牙长轴为近中倾斜，与人类第一前磨牙和第一磨牙近似。 - Results : 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
结果：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。