目的：研究离体下颌前磨牙的牙根及根管形态。
Objective: To investigate the root and canal morphology of extracted mandibular premolars.
方法：从6颗离体的形态正常的人右下颌第一磨牙中，选取密合度最好且形态接近临床要求的1颗进行根管治疗，制作制锁式的带桩嵌体修复体。
METHODS: 1 of the 6 first mandibular molars on the right side with normal morphology in vitro was selected for pulpectomy, which was the best in density and near to clinical requirement in morphology.
方法：25颗离体直根管前牙，随机分为5组，不锈钢K锉常规法预备根管，应用5种冲洗剂组合进行冲洗。
METHODS: 25 extracted human maxillary anterior teeth, with a single straight root were randomly divided into 5 groups. They were instrumented with K-files and conventional preparation technique.
结果表明，以离体去皮根段为外植体，MS为基本培养基，诱导愈伤组织较为适宜。
Callus was efficiently induced from in vitro root segment devoid of rhizodermis on MS medium.
利用离体诱变方法，对37份材料进行了抗根腐病突变体的离体筛选。
The screening wheat mutant which has the resistance to root rot was completed in 37 varieties by in vitro induction mutation method.
并比较了该方法与常规方法对离体牙进行根管清洗时，根管内碎屑清洗的效果和根尖孔的压力变化。
The effect of root irrigation on removing canal debris and the variance of apical foramen pressure on extracted teeth were compared between the conventional irrigation and CANS irrigation.
方法对10例甲根以远指尖离断采取只吻合动脉的方法再植，术后于再植指体末端做小切口放血引流。
Methods 10 patients with a distal fingertip amputation to take root only method of arterial anastomosis replanted. Body in the replanted fingers after the end of a small incision bleeding drainage.
结论 ：金铁锁毛状根离体培养系统的成功建立，对进一步规模化培养金铁锁毛状根具有重要意义。
Conclusion : Establishment of hairy roots culture of P. tunicoides provided a foundation for industrial production of active components from P. tunicoides culture.
本发明公开了一种利用甘薯离体培养不定根产生甘薯芽的方法。
The invention discloses a method for producing sweet potato buds by isolated culture of adventitious roots by sweet potatoes.
主要从以下几个方面进行研究：离体培养体系的建立、遗传转化体系的建立、优良毛状根系的筛选、毛状根最佳培养条件的建立。
This study showed that in vitro systems establish, transformed systems establish, the choiceness hairy root lines select and the optimal culture condition of hairy roots systems establish.
结果：离体牙10颗，上颌第一磨牙近中颊根第二根管发现率为60%，通畅率为50%。
RESULTS: MB2 canal can be located in 60% and dilate 50% of 10 extracted maxillary first molars.
结果：离体牙10颗，上颌第一磨牙近中颊根第二根管发现率为60%，通畅率为50%。
RESULTS: MB2 canal can be located in 60% and dilate 50% of 10 extracted maxillary first molars.
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