Objective: To investigate the root canal configuration and the incidence and location of the isthmus in extracted maxillary second premolar with single root.

目的：研究離體單根的上頜第二前磨牙根尖1—6mm處根管形態(tài)及根管峽部的發(fā)生率和位置的情況日韩内陆美洲无码AV。

Experimental study on static frictional resistance between preadjusted bracket s and archwires in artificial saliva

結(jié)果 直絲托槽位置在第二雙尖牙99久久久无码、第一磨牙處色秀视频久久久，拔牙病例與非拔牙病例托槽的垂直就位高度存在一定差異99免费强奸视频网站。

The apex of the third molar root is mea-sured 11.3mm to the medial alveolarridge.

第三磨牙根尖至內(nèi)側(cè)牙槽嵴的距離為11.3mm。

Look at the toe of this shoe.

乙：真的美女插入网站？看看這只鞋的鞋尖日本深入视频网址，它已磨破了亚洲一区色图小说。

Function relations between the twist drill design and the grinding parameters are derived.

并以尾隙角為補(bǔ)充參數(shù)人人操人人鲁，惟一地確定鉆尖的刃磨參數(shù)。

Days after the extraction of the first premolars, the upper canines were subjected to coronally orthodontic extrusion movements.

后10天內(nèi)提取的第一前磨牙欧美性爱日逼，上尖牙受到冠正畸擠壓運(yùn)動(dòng)玫玖精品视频在线播放。

Change of arch width after extraction and nonextraction treatment;2. Effects on arch width after extraction and nonextraction treatment;3. Intercanine and intermolar arch widths and anterior arch depths of the maxillary and mandibular arches were measured.

結(jié)論與不拔牙矯治相比，拔牙矯治不會(huì)減小尖牙間牙弓寬度和前牙段牙弓長度而影響面部美觀http//www.色.com日本；但拔牙和不拔牙矯治都能引起磨牙間牙弓寬度的改變黄色视频插女，可能影響療效的長期穩(wěn)定性天堂官方无码wwwwww。

objective the purpose of this study was to explore the method and effectiveness of apertognathia of anterior teeth in teenagers.methods the majority patients were corrected with edgewise appliance after draw four molars, all sorts of flexure were curved on the appliance, used perpendicular traction for anterior teeth and ii, iii maxillomandibular traction, fine adjust intercuspal position ,tip and cavity.

目的 探討青少年前牙開牙合的矯治方法和效果。方法多數(shù)患者采取拔除4個(gè)磨牙之后使用方絲弓矯治器矯治国产免费三级片AAAA，矯治中在弓絲上彎制各種曲玖玖爱免费视频在线播放，并使用前牙垂直牽引和頜間ⅱ類、ⅲ類牽引成人免费黄色视频观看在线，精調(diào)牙位及尖窩關(guān)系午夜性一级视频。

Methods The majority patients were Corrected with edgewise appliance after draw four molars, all sorts of flexure were curved on the appliance, used perpendicular traction for anterior teeth and II, III maxillomandibular traction, fine adjust intercuspal position ,tip and cavity.

多數(shù)患者采取拔除4個(gè)磨牙之后使用方絲弓矯治器矯治，矯治中在弓絲上彎制各種曲欧美日韩高清，并使用前牙垂直牽引和頜間Ⅱ類67色国产欧美、Ⅲ類牽引，精調(diào)牙位及尖窩關(guān)系av在线免费看污片。

After 4~8 months, in adult bimaxillary protrusion patients, cuspids were moved to distal, the upper first molars were moved 1.12mm mesially evenly, and the upper incisors were moved 7.91mm palatelly evenly.

成人雙頜前突患者在4～8個(gè)月后遠(yuǎn)移尖牙到位狠狠艹av，拔牙間隙基本關(guān)閉，上頜第一磨牙為近中整體前移黄色日，其冠部平均前移了1.12mm日韩在线不卡免费视频一区，上頜切牙冠部平均向腭側(cè)傾斜移動(dòng)約7.91mm。