Results All of 83 patients with MVD, completed decompression of offending vessels at the root entry zone of the facial never were observed, like the surgical findings, by using the postoperative MRTA.

结果83例患者术后MRTA均反映出MVD手术中的改变，见到责任血管的移位，面神经减压充分。

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The secondary xylem of root is well developed, and there is supernumerary cambium around the vessels.

块根的次生木质部发达，导管周围存在额外形成层。

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Root canal treatment and finished tooth, lost in the pulp cavity nutrition supplies such as nerves, blood vessels, lymphatic, makes itself become more brittle fracture of teeth.

且做完根管治疗的牙齿，失去了牙髓腔中神经、血管、淋巴等营养供应，使得牙齿本身变得较脆易断裂。

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