牙

Bimaxillary protrusion extraction cases, the application implant anchorage appliance, the incisor root resorption evident.

双颌前突拔牙病例，应用种植支抗矫治后，切牙牙根吸收明显。

In a recent study, the researchers found that prolonged consumption of sports drinks may be linked to a condition known as erosive tooth wear, in which acids eat away the tooth's smooth hard enamel coating and trickle into the bonelike material underneath, causing the tooth to soften and weaken.

研究人员发现长期饮用运动饮料会导致腐蚀性的牙磨损，因为一些酸类会侵蚀牙齿表面光滑而坚硬的釉外壳并渗入内部的牙骨质，从而导致软化衰弱。

Methods: 1 HA particles were put into two kinds of solutions, which contained HA or Brushite microparticles, respectively. After vibrating for different time, the number of the microparticles attached to HA particles was measured and compared. 2 The solution containing HA microparticles was painted on the surfaces of exposed dentinal tubules to investigate the sealing effect of HA microparticles on dentinal tubules using ESM.

1羟磷灰石颗粒放入羟磷灰石微粒子溶液中进行机械反应与羟磷灰石颗粒放入Brushite (CaHPO42H2O)微粒子溶液中进行机械反应，对比两种溶液中微粒子附着在羟磷灰石颗粒表面的量。2用羟磷灰石微粒子涂布牙本质表面观察裸露的牙本质小管封闭情况。

Traditiona- ly, the buccolingual width of the pontic is reduced in clini- cal practice to lessen the load of the abutment teeth. But it has little scientific basis.

为了保护基牙、减少基牙的负荷，临床上常常采用减小桥体〓面颊舌径宽度的方法，但是对此一直未有科学的依据，对桥体〓面的设计还缺乏统一的认识。

Measurements of the longitudinalseparation, buccolingual space and highness of the area were established to select the perfect spiral-shafted implant and simulating the implant. by means of the process the dentists can know about the complications well that may happen or not and know how to do the work wonderfully.

选择一例男性、55岁、右下第一磨牙缺失的患者，螺旋CT扫描， DICOM格式数据储存，应用OINS软件进行读取和分析，对缺牙区的前后径、颊舌径和所需高度进行测量，根据所得的数据并结合需要选择合适的种植钉，模拟种植。

For each subject, the buccolingual bone thickness was measured by postulating that the miniscrews would be inserted at 16 positions (10, 12, 14 and 16 mm above the median sagittal planes of the interradicular spaces between the first molars and the second premolars in the maxilla, and 30°, 45°, 60°, 90° from the cortical bone surface).

在重建后的锥形线束CT影像上测量上颌第二前磨牙与第一磨牙牙根间矢状面上距离参考平面10，12，14，16 mm的4个植入高度上，以与骨皮质表面成30°，45°，60°，90°的4个方向共16个部位的颊舌侧骨质厚度，计算各植入部位触及上颌窦的危险率，在骨厚度大于6 mm的植入部位模拟植入微螺钉种植体并测量其周围骨质密度。

MB1 root canals of the mesiobuccal root canals in maxillary molars were found obvious curve out by the rate of 82.5% in mesiodistal direction, 77.5% in buccolingual direction and there is no difference of curvature degree in the two directions.

结果：1上颌第一磨牙腭侧根管通畅、较直。2远中颊侧根管在近远中方向有80%，颊舌方向有45%出现大于5的明显弯曲，弯曲位置多位于根中1/3，且近远中向的弯曲明显大于颊舌向(P.05)。3上颌第一恒磨牙近中颊根颊侧根管在近远中方向、颊舌方向分别有82.5%、77.5%出现大于5的明显弯曲。

Methods Ninety-five lower first molars with buccolingual vertical fracture were separated and cut vertically along the fracture line to exposure the proximal and distal residual roots. After complete pulp canal therapy,the residual roots were covered with PFM post crowns.

方法选取95例颊舌方向纵折之下颌第一磨牙病例，完全纵剖牙冠及髓室底，获得独立的近远中残根，完整的根管治疗后，行桩核和烤瓷熔附金属全冠修复，3年后进行临床评价。

The odontolith is the hard calcified or calcifying lump which is mainly formed by dental plaque .

牙石是附在牙面上的钙化或正在钙化的牙菌班为基质的团块。

It had a small, long head with a flat nose. The Camarasaurus' teeth were shaped like spoons.

牙齿长得像勺子一样（补，当磨损坏了时，它还能长出新的牙来代替原来的旧牙）。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。