objective to explore the method of preserving molar residual root which using the split cast-post- core and crown or bridge.
目的：探讨利用铸造桩核加金属烤瓷冠桥修复磨牙残根的方法。
Methods 15 molar residual roots after excellent root canal therapy had been reconstructed by the split cast-post- core and crown or bridge.
15颗磨牙残根，经完善的根管治疗后，采用桩核加烤瓷冠桥修复。
It will help with body at the crown because we layered it through the back as well, so she`ll get root lift through the top and softness around the cheekbones with the layering at the sides and the ends.
这会改善头顶的型，因为我们在后面同样打层次，这样她就会从头顶开始发根提升，由于在侧面和末梢打层次，颧骨旁会更轻柔。
Applying the temporary full veneer crown before the root canal treatment for cracked teeth can avoid crown fracture and induce less adverse effects.
隐裂牙根管治疗前制作临时树脂全冠对保护患牙，防止冠折有良好的效果，同时不良反应更少。
Methods We Applied the orthodontic band, temporary full veneer crown and steel-wire cerclage to protect cracked molar teeth before root canal treatment. Compare the reserve curative effects of the cracked molar teeth, adverse effects and protectors'shape of the three methods.
选用正畸带环、临时树脂全冠、钢丝环扎3种方法对隐裂磨牙根管治疗前进行保护，并就患牙保留疗效、不良反应、保护装置外形进行临床对比。
Objective To investigate the clinical effect of one-time root canal therapy and reattachment of permanent incisors with crown fracture.
目的：观察恒切牙外伤冠折后行一次性根管治疗与断冠再接术的临床效果。
31 teeth of 27 subjects with crown fracture were treated by reattachment with glassfiber posts and dual-cure composite cement after disposable root canal therapy and all cases were followed up for 2 years.
对外伤引起冠折的折断部分保存完整的31个恒前牙采用玻璃纤维桩及和流体双固化复合树脂进行一次性根管治疗后自体牙断冠再接，并进行2年的追踪观察。
The aims of this study were to determine the rules of bite force changes and some factors, including proximal contact, bone support level, crown to root ratio, occlusal relationship of anterior teeth and tooth wear of loosen teeth. For further studying of dynamic chewing forces, we developed a new system of PVDF-based, which could be used in natural teeth as well as dentures. The biological security, including thrill, cell toxicity, hypersusceptibility and hemolysis characteristics, were also examined. Then, we evaluated the chewing forces during three basal functional movements-tapping, biting and laterotrusion, using the new instrument.
为此，本研究通过临床调查，分析了牙齿松动后，最大〓力值的变化规律以及影响松动牙受力因素，包括牙槽骨吸收程度、冠根比、邻接关系、〓关系、牙齿磨耗程度等；采用PVDF压电薄膜作为传感元件，首次研制出适用于测量单个天然牙咀嚼力的测量系统，并对PVDF压电薄膜的刺激性、细胞毒性、致敏性、溶血性能作以初步评价；采用所研制的咀嚼力测量系统，分析了正常牙与松动牙在紧咬、叩齿、侧〓等功能运动中咀嚼力变化的规律。
Horizontal force is the reason for horizontal crown fracture, while vertical force is liable to oblique root fracture and labial alveolar bone fracture.
研究结果发现，牙齿的阻尼比为14.6 %，当结构阻尼系数变大时，应力有下降趋势且其最大值延后产生；就撞击力的方向而言，垂直向下的力量较垂直向上的力量更容易产生应力集中现象，同时发现水平分量是导致牙冠水平断裂的原因，而垂直分量则易导致牙根斜向断裂与唇侧齿槽骨断裂，当角度由垂直向牙根尖方向且与水平齿槽骨夹77.5度以及垂直向牙冠方向且与水平齿槽骨夹70.9度时，破裂线的延伸是由施力点附近向牙冠切缘处方向进行，而超过此角度时，破裂线是由牙冠切缘处向施力点附近方向延伸；在撞击角度水平向下10.1度或水平向上13.8度时，牙齿的断裂型态则由倾向於唇侧牙冠断裂转变为倾向於牙冠水平断裂。
There was a significant impact on the chlorophyll content between table sugar and sucrose, the content of chlorophyll in the medium of sucrose was higher, while little effect on root, crown, fresh weight increase, and dry weight.
白砂糖和蔗糖对试管苗根部、冠部、鲜质量增量和干质量的影响不大，但对叶绿素的量有极显著影响，选用蔗糖作为碳源时，其叶片的叶绿素的量更高。
Phytophthora capsici is an important fungal pathogen that causes seed rot, seedling damping-off, root and crown rot, leaf spots, stem lesions, foliar blight, and fruit rot in many solanaceous crops and cucurbits (cantaloupe, cucumber, summer squash, pumpkin, watermelon). Rottingof seedlings prior to emergence (preemergence damping-off) and blighting of recently emerged seedlings (postemergence damping-off) can occur.
茄科疫病菌为一重要病原真菌，其在许多茄科作物与葫芦科作物(如哈密瓜、胡瓜、栉瓜、南瓜、西瓜)中会引起种腐病及种苗的猝倒、根腐及冠腐、叶斑、茎部病灶、叶枯和果腐病，而幼苗前猝倒病与后猝倒病亦皆会发生。
Can, under the guidance of the teacher, the correct file to use root canal + protaper, prepared root canal, the sharp taper gutta-percha filling + fiber post + crown restoration or filling operation, the independent number of cases completed root canal therapy and filling.
能够在老师的指导下，正确运用根管锉＋protaper，预备根管，大锥度牙胶尖充填＋纤维桩＋冠修复或充填术，独立完成若干例根管治疗及充填术。
RESULTS: Contrary to the normal occlusion, the mandibular teeth of occlusal model with severe attrition generally bear the torque force with the crown distally and the root medially.
结果：近远中方向上，重度磨耗牙合下颌牙列中各牙均受到冠向远中、根向近中的转矩力作用。
gap by law easy to use, easy to grasp, apply to the relatively high crown boneless resistance, resistance to a small adjacent teeth, the roots for the integration of the root or the root bifurcation cases, such as low lower the removal of impacted wisdom teeth; split crown law Requirements, flexibility in operation, more suitable for medium and low impacted significantly ditch and development, the root fork or a higher resistance to a larger adjacent teeth, and other cases, the lower-third-molar extraction.
结论增隙法操作方便、易于掌握，比较适用于高位、冠部无骨阻力、邻牙阻力小、根部为融合根或根分叉很低等情况下下颌阻生智齿的拔除；劈冠法要求条件高、操作灵活，比较适用于中、低位阻生且发育沟明显、根分叉较高或邻牙阻力较大等情况下下颌阻生智齿的拔除。
Symptoms of Crown and Root Rot of Alfalfa.
苜蓿根和根颈腐烂病的症状。
Silver Yeshu Xiong Wei strange, crown Bitian, a few may be high and the chest, and it is the root Zonghengjiaocuo growth plate, is used to step up inter-tidal soft Shini, stable body of the tree.
爱不释手。银叶树雄伟奇特、树冠蔽天，高度几可及胸，而它那纵横交错生长的板根，是用作抓紧潮间带松软的湿泥，稳定树身的。
The root, rhizomes, crown and first leaf- sheath of inoculated plants discolored and extensively rotted, the upper leaves became yellowing and the height of diseased plants remarkably reduced.
供试草种包括多年生黑麦草、一年生黑麦草、草地早熟禾、高羊茅、硬羊茅、细弱剪股颖、匍匐剪股颖和狗牙根等。
Objective: To observe the effect of casting anatomy bolt post-core in restoration of residual crown and root of molars.
目的：观察分体栓道式铸造桩核在磨牙残冠残根修复中的作用。
After being loaded with horizontal retraction force at various height, displacement and stress distribution of anterior teeth was not well-distributed. Labiolingual displacement of incisors varied from crown lingual tipping to lingual translation and lingual controlling root movement, while canine mainly showed crown lingual tipping. The displacements of teeth increased with the length of hook but their moving tendency remained unchanged. Stress distribution in PDL was in accordance with teeth displacement.
2水平向后牵引力的作用点升高时，上前牙的位移和应力分布趋势各不相同：切牙的唇舌向位移由冠舌向倾斜逐渐变为舌向整体移动和舌向控根移动，尖牙则以冠舌向倾斜位移为主；前牙位移量随牵引力高度增加而增大，但位移趋势较为稳定；牙周膜应力分布与其位移趋势相一致。
Methods The crown repair was performed after restoration with ring fixation and canal root treatment.
方法采用复位环扎固定，经降牙合、备洞及完善根管治疗后全冠修复。