中华口腔医学杂志
中華口腔醫學雜誌
중화구강의학잡지
Chinese Journal of Stomatology
2012年
z1期
35-39
,共5页
牙髓腔%根管疗法%根管峡部%扁根
牙髓腔%根管療法%根管峽部%扁根
아수강%근관요법%근관협부%편근
Dental pulp cavity%Root canal therapy%Canal isthmus%Oval shape roots
目的 观察上颌第一前磨牙的根管分布、峡部形态和纵向走行变化,为根管治疗和根尖手术提供根管解剖形态的指导.方法 收集北京大学口腔医学院·口腔医院口腔颌面外科门诊拔除的上颌第一前磨牙118颗,进行横切片,体视显微镜下观察牙根全长的根管数目、峡部形态及Hsu和Kim分型.结果 72.0％(85/118)的牙根含双根管,有峡部者占69％(59/85)；牙根在根冠1/3段的双根管占99％(84/85),独立双根管和含峡部者均占49％ (42/85),含峡部双根管在向根尖走行的过程中逐渐融合为单根管；全根长中根管峡部的横断面形态主要为Ⅳ和V型.结论 上颌第一前磨牙双根管间峡部主要存在于根中1/3,横断面形态与根管通联,根冠向根尖走行过程中渐融合为单根管；提示临床根管治疗中应以渗透性强的冲洗剂充分浸泡,加强对峡部的清理,提高疗效.
目的 觀察上頜第一前磨牙的根管分佈、峽部形態和縱嚮走行變化,為根管治療和根尖手術提供根管解剖形態的指導.方法 收集北京大學口腔醫學院·口腔醫院口腔頜麵外科門診拔除的上頜第一前磨牙118顆,進行橫切片,體視顯微鏡下觀察牙根全長的根管數目、峽部形態及Hsu和Kim分型.結果 72.0％(85/118)的牙根含雙根管,有峽部者佔69％(59/85)；牙根在根冠1/3段的雙根管佔99％(84/85),獨立雙根管和含峽部者均佔49％ (42/85),含峽部雙根管在嚮根尖走行的過程中逐漸融閤為單根管；全根長中根管峽部的橫斷麵形態主要為Ⅳ和V型.結論 上頜第一前磨牙雙根管間峽部主要存在于根中1/3,橫斷麵形態與根管通聯,根冠嚮根尖走行過程中漸融閤為單根管；提示臨床根管治療中應以滲透性彊的遲洗劑充分浸泡,加彊對峽部的清理,提高療效.
목적 관찰상합제일전마아적근관분포、협부형태화종향주행변화,위근관치료화근첨수술제공근관해부형태적지도.방법 수집북경대학구강의학원·구강의원구강합면외과문진발제적상합제일전마아118과,진행횡절편,체시현미경하관찰아근전장적근관수목、협부형태급Hsu화Kim분형.결과 72.0％(85/118)적아근함쌍근관,유협부자점69％(59/85)；아근재근관1/3단적쌍근관점99％(84/85),독립쌍근관화함협부자균점49％ (42/85),함협부쌍근관재향근첨주행적과정중축점융합위단근관；전근장중근관협부적횡단면형태주요위Ⅳ화V형.결론 상합제일전마아쌍근관간협부주요존재우근중1/3,횡단면형태여근관통련,근관향근첨주행과정중점융합위단근관；제시림상근관치료중응이삼투성강적충세제충분침포,가강대협부적청리,제고료효.
Objective To describe the transverse morphology and variation in long axis of isthmus in maxillary first premolars.Methods One hundred and eighteen maxillary first premolars were collected from the extracted teeth.Consecutive transverse sections vertical to the long axis of the roots were made every 1 mm from the apex to cemento-enamel junction.The section was observed under a stereomicr-oscope at 10-20 magnification.The classifications(Hsu&Kim Classification) of isthmus were recorded.Results Of the 118 maxillary first premolars,85 (72.0％) had two canals,the incidence of isthmus with two canals was 59 (69％).Two canals mostly remained separated throughout the root.Two canals with isthmus almost merged into one canal,isthmus faded away at apex in maxillary first premolars.The most patterns of isthmus in total canal were type Ⅳ,type V.Conclusions Most oval shape roots of permanent teeth had two canals.Most of isthmus were located in the coronal 2/3 of the roots,therefore,debridement and sealing of the related area should be emphasized in order to obtain effective root canal therapy.
