He argues that tooth crowns and roots have a high genetic component, minimally affected by environmental and other factors.
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2. 它就像牙根管一样普及。
It was about as popular as a root canal. (Speaking of the bank bailout).
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3. 牙根长度的变化无统计学意义。
And there is no significant change in root length.
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4. 目的：了解下颌前牙根管弯曲情况。
Objective: To investigate root canal curvatures in mandibular anteriors.
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5. 牙根管补过的牙有时会变色。
Sometimes a tooth with a root canal filling will change color.
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6. 牙根是没有牙釉质盖住的。
The root isn't covered with tooth enamel.
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7. 爸爸需要做牙根管治疗。
Dad needs to have a root canal operation.
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8. 牙齿都是有根的，牙根深切到你的牙床里。
They have roots that go deep into your gums.
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9. 目的观察离体上颌第一前磨牙根管解剖结构。
Objective the aim of this study was to investigate the root canal system of maxillary first premolar .
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10. 目的观察上颌第二前磨牙的牙根及根管形态。
Objective To investigate the root and canal morphology of extracted maxillary second premolars.
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11. 再把受感染的牙根梢和受感染的组织切除之后。
After the infected root tip and infected tissue have been removed.
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12. 目的：研究离体下颌前磨牙的牙根及根管形态。
Objective: To investigate the root and canal morphology of extracted mandibular premolars.
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13. 目的研究上颌第一前磨牙根管颊舌向的弯曲情况。
Objective To investigate root canal curvatures of human maxillary first premolars in buccolingual directions.
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14. 另外，还要将牙根周围颌骨受感染的组织切除掉。
Another Part of the treatment is to remove the infected (or cystic) tissue from the jaw-bone surrounding the root.
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15. 目的研究影响正畸治疗后牙根吸收的部分临床因素。
Objective to investigate the factors relating to root resorption after orthodontic treatment.
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16. 一颗牙齿在工作，另一颗则闲着，它的牙根部得不到刺激。
One tooth works while the other one idles and gets no stimulation in its root area.
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17. 结论珊瑚克林霉素糊剂是一种较理想的前牙根管充填材料。
CONCLUSION The clindamycin loaded coral paste is an ideal front tooth root canal filling material.
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18. 牙周袋（牙根周围牙龈感染）多的比牙周袋最少的心脏病风险高53%；
A higher number of deepened periodontal pockets (infection of the gum around the base of the tooth) had a 53 percent increased risk of heart attack compared to those with the fewest pockets.
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19. 前言：目的：观察意向再植术治疗磨牙根尖周炎的临床疗效。
Objective: To observe effects of replantation on treatment of serious periapical periodontitis of molar.
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20. 目的：探讨大鼠磨牙牙根根端组织发育牙根和牙周组织的能力。
Objective: to evaluate the capability of the apical tissue of rat molar to grow tooth root and periodontal tissue.
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21. 目的：探讨下颌第二磨牙根管系统的特征及临床诊断和治疗方法。
AIM: To discuss the clinical diagnosis and treatment of root canal system of mandibular second molars.
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22. 结果：无牙根保留的牙槽骨吸收较有牙根保留的牙槽骨吸收明显。
Results: bone resorption was more obvious in alveolar bone with residual roots than that without roots.
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23. 目的：评价标准方丝弓配合高位J钩对正畸治疗中牙根吸收的影响。
PURPOSE: The purpose of this study was to evaluate the effect of high pull J hook headgear(HPHG) on root resorption of maxillary incisors during orthodontic treatment.
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24. 只有一个牙尖的牙齿。任何一个尖牙都有一个较长的牙根。也称为犬齿。
A tooth with a single cusp. cuspids have the longest root of any tooth. also known as a canine.
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25. 目的：评价直接数字化影像技术在下颌第一磨牙牙根纵裂诊断中的作用。
Objective:To evaluate the contribution of radiogram in diagnosis of primary vertical root facture in mandibular first molar.
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26. 我有一颗牙在牙根管里补过。现在这颗牙变了颜色，有什么办法可以解决？
I have a root canal filling in one of my teeth. The tooth is changing color. Can anything be done about it?
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27. 目的探讨数字化根尖片和普通根尖片在评价牙齿长度和牙根吸收方面的差异。
Objective to investigate the difference between digital periapical film and conventional film in the evaluation of tooth length and root resorption.
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28. 人类牙齿发育是一个连续的过程，经历了蕾状期、帽状期、钟状期和牙根发育期。
Human tooth development is a consecutive process, which includes bud stage, cap stage, bell stage and tooth root development.
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29. 这感觉是怪异的，就像居然有人渴望牙根管治疗一样，而且就发生在这儿，米开朗琪罗的城市。
It felt weird, like pining for root-canal treatment, and it happened right here in the city of Michelangelo.
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30. 这感觉是怪异的，就像居然有人渴望牙根管治疗一样，而且就发生在这儿，米开朗琪罗的城市。
It felt weird, like pining for root-canal treatment, and it happened right here in the city of Michelangelo.
