磨尖

The abrader is a bit rough,and because some different directions in different places,it leads different glisten in g.

磨石还是有点粗，另外因为有些地方磨的方向不一致，导致反光较乱，剑尖磨得不错！！

AIM:To determine the efficiency of surgical o perating microscopein locating the se- cond mesiobuccal canal of perm anent upper first molar.

上颌第一恒磨牙在口腔内萌出较早，其龋病和尖周病的发病率较高，然而有资料统计其根管治疗的成功率较低。

GP ARRIS STEEL GRIT Angular when new.this grit rapidly rounds off in use and is particularly suited to descaling applications.

此种磨料新制成时，是尖棱状的，使用过程中棱角很快就被磨圆，特别适合于去除氧化皮作业。

Results: The average value of periodontal attachment level in the healthy adults was 5.03 mm in incisor zone, 2.93 mm in bicuspid zone, and 3.45 mm in molar zone.

结果 ：健康成年人牙周附着水平平均值前牙区为 5 。0 3mm、双尖牙区为 2 。93mm、磨牙区为 3.45mm。

Methods A modified Bramante muffle was used and 22 chinese mandibular second molars with Cshaped root or seperated roots were sectioned into four pieces perpendicularly distance from apex to 3,3.5,8 mm,respectively.The crosssectional anatomical morphology was observed and the minimum root canal wall thickness of each section was measured.

使用改良Branmante体外模型，将具有C形牙根或两个独立牙根中国人下颌第二恒磨牙各22颗，在距根尖3，5.5，8 mm处将样本锯为四段，观察C形根管横断面形态，测量断面最小根管壁厚度。

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。

Type 1-1-1,2-2-1 and 2-2-2 account for 91 4%;The appearing rats of distal lingual canal are 24 7%;The appearing rats of double root canal orifices are as follows:Medial canal 78 3%,distalcanalIt don't ...

远中舌根的发生率为 2 4 。7%；双根管口率：近中根为 78.3%，远中根(不含远中舌根，下同)为 19.3%；双根管率：近中根为 88.3%，远中根为 2 3.3%；双根尖孔率：近中根为 5 6 。7%，远中根 8.3%，单根管口而有双根尖孔者，近中为 6 。7%，远中为 3.3%。结论下颌第一恒磨牙根管的类型复杂，充分了解其根管解剖对提高根管预备效果、减少根管遗漏有重要意义。

Class Ⅲ furcation defects were created at the mandibular second pre-molars, first molars and second molars.

人工制备3只食蟹猴双侧下颌第二双尖牙、第一磨牙和第二磨牙的慢性Ⅲ度根分叉病损。

Methods Ten volunteers with experimental premature contact at the first premolar, the first molar and the second molar were asked to clench in CO and their electromyographic activity of the masseters, anterior temporalis and anterior belly of digastric muscles were measured simultaneously.

测定 10名志愿者在正中牙合；左右两侧下颌第一双尖牙、第一磨牙、第二磨牙实验性早接触状态下，嚼肌、颞肌前束及二腹肌前腹肌电活动的积分值与频谱值。

67 of old person latent to split tooth carry on clinical diagnosis, adopt the complex treatment method according to different situations to 63. 4 shallow form latent to split tooth, dental pulp normal having subjective symptoms to be only competent to transfer tooth treat jointly; Have deeper crackle as to 5, the vigor of dental pulp is normal, but there is trouble tooth of dentine irritated symptom, prepares against the hole, is filled with on the crack while adjusting the tooth contract; Pulpitis, 22 58 drops of trouble tooth with the sharp disease, symptom of the root already appear to 36, go ahead of the rest steel wire ring pitch or make, bring ring bonding in order to protect corona, rub except that high sharp abrupt slope, after dispelling the tooth and shutting the wound, the root canal with complete regeneration, observe for 2 weeks, after there is no clinical symptom, preceded and repair completely in time.

对63例老年人67颗隐裂牙进行临床诊断，并根据不同情况采用了综合治疗的方法。4颗浅表的隐裂牙，牙髓正常且无自觉症状仅行调牙合治疗；对于5颗有较深裂纹，牙髓活力正常，但有牙本质过敏症状的患牙，调牙合同时在裂隙处备洞、充填；对36颗已出现牙髓炎、22颗伴有根尖病症状的58颗患牙，先行钢丝环扎或做带环粘结以保护牙冠，磨除高尖陡坡，消除牙合创伤后，再行完善的根管治疗，观察2周，无临床症状后，及时做全冠修复。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。