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.

為了解住在臺灣的中國人其牙齒的大小黄色网站免下载，齒列弓幅徑及形態(tài)亚洲欧美日韩无，為齒科人類學上的特微有码一区，以期能對兒童牙科人人看的三级黄色网站，齒顎矯正科之臨床及齒科基礎醫(yī)學能有所貢獻在线观看黄色视频毛片，抽取12歲學童男女各30名共60名国产迷奸在线观看，可接受為正常咬合之上下顎齒列模型，測量其上下顎(1)左側正中門牙到第一大臼齒共計12顆恒牙之牙冠近遠心徑欧美一级做一级a做片性，(2)齒列弓寬徑啊用力插视频、長徑及齒槽基底寬徑、長徑成年美女黄网站18禁免费动态图，(3)齒列弓之形態(tài)国产毛片在线看线，以上資料經(jīng)統(tǒng)計分析作t-test檢定，并與諸學者對日本人久久久久国产精品爆乳、北美白人色一区二区、中美及南美印第安人人種的研究結果作檢討得知；(1)男女性恒牙的近遠心徑無明顯差異亚洲高偷拍一区二区三区，但男性上顎第大臼齒比女性者大好大好爽插我视频在线播放免费，下顎正中門牙比女性者小全球二级三级黄视频；(2)男性的齒列弓幅徑比女性者為大动漫在线，尤以齒槽基底寬徑及長徑最顯著；(3)國人男子的牙齒近遠心徑比其他四人種者為小就是操就是干，特別是國人的上顎犬齒人人操人人看人人插人人干，下顎正中門牙及第一大臼齒最小。

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.

但中美印第安人之齒列弓長徑比國人者長看欧美一级片子视频，南美印第安人之齒列弓寬黄色A片三级三级三级免费看、長徑則比國人者更長；(5)檢討四種人種的齒列弓形態(tài)的重疊影像日免费在线精品，可發(fā)現(xiàn)四種蒙古人種的齒列弓形態(tài)都極為酷似性无码高潮在线网站，呈現(xiàn)弧度較大的橢圓形。

One is preshaped NiTi rocking-chair archwire whose form is like letter "L", the other is the standard arch form rocking-chair archwire which is shaped by orthodontists in clinic according to various standard arch forms of straight wire appliance.

臨床常用的搖椅弓形主要有兩種：一種是&L&形的預成NiTi搖椅弓怕怕怕免费网站18以上看；另一種是我們在臨床上自己彎制的探花自拍日韩视频在线、與各種標準弓形一致的標準弓形搖椅弓。

arch floor：拱形底板,拱形樓板

arch face ==> 拱面 | arch floor ==> 拱形底板,拱形樓板 | arch form ==> 弓形