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- Hypoplasia of teeth root (HTR) disease is a disorder with physiological development of tooth root. 摘要牙根发育不良疾病是牙齿根部生理性发育出现障碍的疾病。
- Keywords hypoplasia of teeth root;causative factor; 牙根发育不良;病因;
- hypoplasia of teeth roots 牙根发育不良疾病
- hypoplasia of tooth roots 牙根发育不良疾病
- hypoplasia of teeth root 牙根发育不良
- METHODS: 3 children with hypoplasia of teeth were examined and analyzed carefully by clinical examination and laboratory test to find the genetic factors. 方法:采用临床、实验室检查方法对3例患儿进行详细的体检,并分析导致出现牙根发育不良表型的遗传学因素。
- RESULTS:During the normal growth of teeth roots, apoplosis cells are found specially in odontoblasts, pulp, dental papilla, HERS and alveolar bone. 结果:牙根发育时期在成牙本质细胞、牙髓组织、牙乳头组织、上皮根鞘、牙槽骨组织中有特异件细胞调亡发生。
- Considering the time-variant mesh stiffness, the calculated results demonstrated the change of tooth root bending stress in one engagement period. 计算结果揭示了由于时变啮合刚度的影响齿根弯曲应力在一个啮合周期的变化规律。
- This paper discussed the relationship between the involute pitch of tooth root and tooth profile involute in hobbing. 本文阐述了滚刀滚齿时齿轮齿根过渡曲线的延长渐开线的等距线与齿轮齿形渐开线的关系。
- I pick up a leaflet about the care of teeth. 我拿起一张宣传保护牙齿的传单。
- It is proved that the pressmark of tooth root, the state of carbide and remanentelements in the material have different effects on the toughness of POwer hacksaw blades. 结果证明，机用锯条的分齿压痕、基体碳化物状况以及材料中的残存元素等对机用锯条的韧性有不同程度的影响。
- The carburizing quenching can raise the surface microhardness of gear, but the carburized layer thickness of tooth root is too thick to worsen the quality of gear. 渗碳淬火可以提高轮齿表层的显微硬度，但齿根渗碳层厚度较大，对齿轮质量不利；
- Cleanness of teeth in that area make many people die. 那个地区的食物缺乏导致多人死亡。
- Conclusion Calcium-hydroxide-iodoform paste used for apexification has antisepsis,anti-inflammation,and is very helpful to improve development of tooth root. 结论：在根尖诱导成形术中，应用氢氧化钙碘仿糊剂，有防腐、抗感染、促使牙根继续发育和根尖形成的作用。
- The algorithm and formulas to determine the size of tip relief modification of pre shaving gear hobs are put forward.A principle to determine the lead width of tooth roots is also presented. 给出了剃前齿轮滚刀修缘尺寸的计算方法和计算公式，并对滚刀齿根的齿间槽宽提出了更为合理的判断原则。
- The type,number,and arrangement of a set of teeth. 牙列，齿系牙床的类型、数目和安排。
- He wears a broad grin,display twin stump of teeth. 他咧嘴笑著，露出一对残牙。
- What will the world of tooth care look like then? 那么，到那时牙齿保健领域会是一派什么景象呢?
- bending fatigue strength of tooth root 齿根弯曲疲劳强度
- She's 80, but she still has a perfect set of teeth. 她虽已80岁,但仍有一副完好的牙齿。
