牙

Methods: Normal dentognathic models were obtained by cephalometric roentgenography in 56 teenages (30 boys and 26 girls) aged 10～17 years.

由于正常牙合人的牙、牙弓大小存在着种族、民族和地区间的差别〔1～ 3〕，我国学者已对汉族、藏族人的牙颌模型做了测量研究〔3～ 5〕。

The pain-suffering that the toothache that various burning disease causes brings sufferer from go without saying, because of each on the sick list tooth, oneself is all continuously production, made duplicate a great deal of hotbed of germ virus, was passing blood toward the whole body dissemination every day, then violated the whole healthy body, in this time, traditional mouth cavity tooth disease treatment method, have to adopt destructiveness of pulled out a tooth therapyincluded to pull out a tooth, have a tooth filled, root-canal treatment etc.

各种炎症引发的牙痛给患者带来的痛楚自不必说，由于每颗患病牙齿，本身都是一个不断生产、复制大量病菌病毒的温床，每天都在通过血液向全身传播，进而侵害整个身体健康，在这个时候，传统的口腔牙病治疗方法，不得不采取破坏性的拔牙疗法（包括拔牙、镶牙、根管治疗等），来阻止口腔疾病恶化对身体健康的各种不利影响，然而，这种"亡羊补牢"式的破坏性的疗法，却是以牺牲牙齿为代价的。

Result:One case originated from the supernumerary teeth on the floor of left nasal cavity, and the other left reversed lateral incisor.

结果：1例起源于左鼻腔底额外牙的含牙囊肿，另1例起源于左鼻腔底倒生侧切牙的含牙囊肿，均有同侧上唇、鼻旁的反复肿胀史。

Medicine, said abnormal tooth eruption such as "viviparous teeth","new teeth""the birth of teeth" and so on.

医学上称这类萌出的异常牙为"胎生牙"、"新生牙""诞生牙"等。

The color of the maxillary anterior teeth is related to tooth position, the central incisor is the lightest but the canine is the darkest, and the canine is redder, yellower, and has the highest Chroma

上前牙的颜色与牙位有关，中切牙的亮度最大而尖牙最暗且颜色更偏红、偏黄，饱和度也最大

Congenital missing tooth can be divided into hypodontia、oligodontia and anodontia. Oligodontia is defined as absence of six or more teeth.

先天缺牙可分为个别牙先天缺失、多数牙先天缺失和先天无牙症三种类型。

(1) The 2% glutaraldehyole pulpotomy has the function of killing bacteria and could cure deep caries and early pulpitis;(2) The curative effects of six months after operation is better than that of three months and of upper jaw is better than that of lower jaw by using 2% glutaraldehyole pulpotomy;(3) The prognosis of 2% glutaraldehyole pulpotomy depends on selecting indication and the patients cooperation in the course of operation;(4) It must be early performed with the root canal therapy that the cases of further developing apicitis, the absorption of root apiex is over 1/3, the pulp necrosis and periapical disease.

(1) 2%戊二醛活髓切断术具有杀菌的功能，对于深龋及早期牙髓炎可以治愈；(2) 2%戊二醛活髓切断术治疗乳磨牙牙髓炎六个月后的疗效明显好于三个月的疗效，上颌组疗效明显好于下颌组；(3) 2%戊二醛活髓切断术的预后取决于适应证的选择及治疗过程中患儿的配合程度；(4)对于进一步发展为根尖炎的病例及根尖吸收超过1/3、牙髓坏死和根尖周有病变者，应及早行根管治疗术。

On the other hand, extract of cemental matrix was separated and clarified from healthy teeth which were extracted because of orthodontic treatment.

从因正畸需拔除的健康牙体表面获得牙骨质基质提取物，分别观察不同作用时间、不同浓度的牙骨质基质提取物对牙龈成纤维细胞和牙周膜成纤维细胞在牙体表面附着的影响。

The using of cephalogram is limited because of the structure overlapping of the skull, jaw and teeth, for example the overlapping of the right side teeth and the left side make it difficult to distinguish the landmarks of posterior teeth.

颅颌骨牙齿之间影像的重叠使头颅定位x线片的应用受到了限制，比如牙列的重叠使后牙区的标志点难以辨认，所以对牙列的研究要借助牙〓模型。

The arrangement of odontoblasts was found in line and there was no inflammation. The root pulp and periodontal tissue were normal. Finally the opened area was closed by dentinal bridge.

周边造牙本质细胞排列整齐，牙髓无炎症及变性，根髓及牙周组织正常，最终形成牙本质桥将穿髓孔封闭使牙髓保存了活力。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。