目的：通过根管外科手术，治疗一些常规根管治疗疗效不佳，根管内有不能取出的充填物而不能进行常规根管治疗的患牙。
AIM:To observe the clinical effect of endodontic surgery. METHODS: 10 cases were reacted badly to or couldn't be treated by routine root canal therapy.
目的：通过根管外科手术，治疗一些常规根管治疗疗效不佳，根管内有不能取出的充填物而不能进行常规根管治疗的患牙。
AIM:To observe the clinical effect of endodontic surgery. METHODS: 10 cases were reacted badly to or couldn't be treated by routine root canal therapy.
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