列齿

The morphology of the radula obtained from anatomizing and being cooked in 10% NaOH solution,was compared in detail among seven common species of molluscan ployplacophora in Fujian coast on the basis of microscopic observation in the present work.

应用10%NaOH溶液烧煮齿舌部获得可清晰观察的舌齿带的方法，对福建沿海7种常见多板类软体动物的齿舌形态作了详细的比较研究，结果表明，多板类齿舌上每一横列舌齿恒为17枚，对称排列，其中以内侧齿端部形态的种间差异显著，在系统分类上具有重要意义。

In the paper,the transmission of designed roller oscillating tooth reduction gear adopts osci llating tooth gear drive without exception,one-stage reduction gear and two-stage reduction gear have joined through spline coupling band;The joining way of shock wave thellomble and oscillating tooth adopts the biserial bearing of without inner ring of needle bearing,and directly adopts bearing outer ring as shock wave thellomble;Center wheel of two-stage reduction gear and center wheel of two-stage reduction gear passes through taper thread,and center wheel is fixed;As soon as the flange of input end and center wheel of one-stage reduction gear,the flange of export end and center wheel of two-stage reduction gear makes monobloc structure.

本文预设的井下减速器的传动均采用活齿传动，一级减速器的输出轴和二级减速器的输入轴通过花键联轴套联接；激波环与活齿的毗连方式采用能蒙受较大载荷的无内圈双列滚针不锈钢管，且直接采用不锈钢管外圈作为激波环；一级减速器的中心轮和二级减速器的中心轮是通过锥螺纹毗连的，且中心轮固定；一级减速器的中心轮与输入端的法兰盘，二级减速器的中心轮与输出端的法兰盘均做成整体的结构。

In the paper,the transmission of designed roller oscillating tooth reduction gear adopts oscillating tooth gear drive without exception,one-stage reduction gear and two-stage reduction gear have joined through spline coupling band;The joining way of shock wave thimble and oscillating tooth adopts the biserial bearing of without inner ring of needle bearing,and directly adopts bearing outer ring as shock wave thimble;Center wheel of two-stage reduction gear and center wheel of two-stage reduction gear passes through taper thread,and center wheel is fixed;As soon as the flange of input end and center wheel of one-stage reduction gear,the flange of export end and center wheel of two-stage reduction gear makes monobloc structure.

本文设计的井下减速器的传动均采用活齿传动，一级减速器的输出轴和二级减速器的输入轴通过花键联轴套联接；激波环与活齿的连接方式采用能承受较大载荷的无内圈双列滚针中国财经圈，中国财经圈，且直接采用进口中国财经圈外圈作为激波环；一级减速器的中心轮和二级减速器的中心轮是通过锥螺纹连接的，且中心轮固定；一级减速器的中心轮与输入端的法兰盘，二级减速器的中心轮与输出端的法兰盘均做成整体的结构。

From a preventive and interceptive viewpoint, when a child's dentition is a Class I relationship before the primary second molars are lost, so that the space derived from mesial drift and diastemata is available, it is likely that emerging permanent teeth will assume correct alignment.

由预防性与阻断性的观点而言，当小病人在第二乳臼齿脱落之前的齿列是一级咬合关系时，如此空间可由近心倾斜门齿间隙所获得，而将来的永久齿是可得一正确的排列。

A case report was presented with a female patient of class II malocclusion, bimaxillary dentoalveolar protrusion with space deficiency. Bilateral lower left second molars were mesially inclined impactions with large caries. The lower left second molar was diagnosed with acute apical periodontitis.

本文提出一双颚齿槽前突合并齿列拥挤之安格氏二级咬合不正之女性患者，其下颚两侧第二大臼齿为近心倾倒之阻生齿合并龋齿，而左下第二大臼齿之龋齿已侵犯到牙髓而有急性根尖牙周炎的情况。

Both upper and lower dental study models were collected from 30 boys (12 years old) and 30 girls (12 years old) with acceptable normal occlusion to understand the characteristics of the crown size, dental arch width and length such as (1) mesiodistal diameters of crown size from central incisor to first molar,(2) the width and length of dental arch and basal arch and (3) the morphology of dental arch form. After statistical analysis, data were compared with Japanese, Central and South American Indians and North American Caucasians from papers. The results were:(1) There was no statistical difference in teeth size between males and females, except the upper first molar of males was larger than that of females, lower central incisor of males was smaller than that of females.(2) The dimensions of dental arch of males were larger than that of females in general, especially such items as width and length of basal arch.(3) The crown size of Chinese male was in generally smaller than that of four other races, especially the upper canine, lower central incisor and first molar.

为了解住在台湾的中国人其牙齿的大小，齿列弓幅径及形态，为齿科人类学上的特微，以期能对儿童牙科，齿颚矫正科之临床及齿科基础医学能有所贡献，抽取12岁学童男女各30名共60名，可接受为正常咬合之上下颚齿列模型，测量其上下颚(1)左侧正中门牙到第一大臼齿共计12颗恒牙之牙冠近远心径，(2)齿列弓宽径、长径及齿槽基底宽径、长径，(3)齿列弓之形态，以上资料经统计分析作t-test检定，并与诸学者对日本人、北美白人、中美及南美印第安人人种的研究结果作检讨得知；(1)男女性恒牙的近远心径无明显差异，但男性上颚第大臼齿比女性者大，下颚正中门牙比女性者小；(2)男性的齿列弓幅径比女性者为大，尤以齿槽基底宽径及长径最显著；(3)国人男子的牙齿近远心径比其他四人种者为小，特别是国人的上颚犬齿，下颚正中门牙及第一大臼齿最小。

This case report provided the non-retentive telescopic denture treatment for severe attritted dentition due to parafunctional habits of bruxism and loss of posterior teeth support.

本病例讨论对於因磨牙与后牙丧失而造成之严重磨耗齿列，以双重冠义齿的治疗方式提高咬合高度并恢复齿列外观。

This condition is characterized by severe skeletal and dental malformations and underdevelopment, including partial or total absence of unilateral or bilateral clavicles, multiple impacted supernumerary teeth and impacted permanent teeth.

临床表徵多呈现严重骨骼及齿列发育异常，包括单侧或双侧锁骨部分或全部缺失、多发性阻生齿及赘生齿等。

Depending on the method of manufacture, the gear may be of the continuous-tooth herringbone variety or a double-helical gear with a space between the two halves to permit the cutting tool to run out.

推力问题可以通过在同一坯见切削两组斜齿来克服。根据制造方法的不同，齿轮可以是连续人字形的，或者在两列斜齿之间留一间隙的双斜齿形的，以便切削刀具通过。

The dimensions of dental arch in Chinese were very similar to Japanese, South and Central American Indians, but wider and shorter than Central and South American Indians.(5) The superimposition of dental arch form showed that the four races of Mongoloids had similar ovoid dental arch forms.

但中美印第安人之齿列弓长径比国人者长，南美印第安人之齿列弓宽、长径则比国人者更长；(5)检讨四种人种的齿列弓形态的重叠影像，可发现四种蒙古人种的齿列弓形态都极为酷似，呈现弧度较大的椭圆形。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。