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既往诊断为中龋的乳磨牙，都采用姑息牙髓充填疗法．若出现慢性很尖脓肿，临床难以治愈。对此我们不得不采用最终拔除中间乳磨牙的办法予以根治。我们对拔己的角牙，借助扫描电镜进行了形态学观察，为改进临床间均治疗方法提供了科学依据。！及因与方法！．1资料选择门诊就医首
Past diagnosis of caries in the molars, palliative pulp filling therapy are used. If there is chronic very sharp abscess, clinically difficult to cure. For this we have to use the final removal of the middle molars to be cured. We have extracted the corner teeth, with the help of SEM to observe the morphology and provide a scientific basis for improving the clinical treatment. ! And because of the method! . 1 data selection outpatient first