牙根管

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。

Objective To observe the clinical effects of three methods protecting cracked molar teeth during root canal treatment.

目的：临床对比观察3种方法对隐裂磨牙根管治疗中的保护效果。

It was about as popular as a root canal.

它就像牙根管一样普及。

This patient of sorts at Miami's Metrozoo goes to the dentist for a root canal. The Malayan Sun Bear also had another tooth repaired.

这位迈阿密城市动物园的病人因牙根管问题而去看了趟牙医，这只马来黑熊之前也曾补过一颗牙。

Using stereomicroscope, we observed the fracture line direction and location as well as the angle between the fracture line and the attrite plane. The data was compiled into statistics and analyzed. The results revealed that most of the vertical root fractures occurred in teeth with severe attrite crown and flat root. Numerous bucco-lingual oriented fractures occurred in the mesial root of molars, and we found three non-endodontically treated cases with mesio-distal oriented fractures in the palatal roots.

结果发现，两组的垂直牙根断裂均好发於牙冠严重磨耗（77.4-88.2%）且扁平的牙根（61.8-75.8%）上，以大臼齿的近心牙根发生率最高（64-85.7%），多为颊舌侧走向（91.2-91.9%），且於未根管治疗组别亦发现三例腭侧根断裂，走向为较宽的近远心方向，显示牙根断裂会沿著牙根较宽的方向发生；同时，未经根管治疗而产生垂直牙根断裂的牙齿具有根叉位置较低的现象（61.8%），牙根於比例上有较短小的特徵。

Distobuccal root canals were found obvious curve out by the rate of 80% in mesiodistal direction, 45% in buccolingual direction.

目的：分析上颌第一恒磨牙根管弯曲发生情况、弯曲位置、弯曲方向及弯曲程度。

The proportion of maxillary center incisors, maxillary lateral incisors, maxillary canines curved in mesiodistal were 11.17%, 16.19% and 21.43%, in labio-lingual were 39.59%, 40.00% and 29.59%, both in labiolingual and mesiedistal directions were 4.60%, 35.24% and 24.49%.

大约50％左右的上颌前牙根管存在中度弯曲：与上颌切牙相比，上颌尖牙的弯曲度略大而弯曲半径略小。

Maxillary second molar has five subtype, Type A: absence of root fusion, Type B: presence of mesiobuccal and distobuccal root fusion, Type C: palatal root with anyone of buccal root fusion of molar with three roots, Type D:complete root fusion of molar with three roots, Type E:pseudofusion of molar.

分析其牙根发育沟之发生率、牙根发育沟之长度、牙根发育沟至牙骨质牙本质交界的距离，以及牙根发育沟最深点的深度、占牙根长的位置、与到牙根根管的距离，并且将牙根分类为上颚第一大臼齿，仅一种分类。

On the same day my car broke down, my refrigerator conked out and I learned that I needed root-canal work in my right rear tooth

我的汽车坏了，电冰箱出毛病了，还有人说我的右后牙得做牙根管治疗。而这几件事竟然都发生在同一天！

Methods 5 mg dexamethasone was injected submucosally at apical region of 80 teeth with asymtomatic pulp necrosis after root canal therapy ,then observing the incidence of EIP and compared with control group.

方法对80例死髓牙根管治疗后，在根尖周局部注射5 mg地塞米松，采用临床观察分析法，观察治疗组与对照组临床反应的差异。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。