Objective:To explore the treatment of front teeth defect or absence.
目的：探讨前牙修复的方法。
Objective to evaluate the aesthetic effects of anterior teeth defect restored with fiber posts and resin cores after long-term clinical observation.
目的：使用纤维桩树脂核修复前牙牙体缺损，通过对修复体长期的临床观察，评价其美学效果。
What is the defect of the structure of the tooth(teeth)?
什么是牙齿结构上的缺陷呢？
Objective: To explore the clinical effect of full crown with core prosthesis on the massive defect of posterior teeth.
目的：观察探讨核全冠修复后牙大面积缺损的临床应用效果。
PURPOSE: To observe the clinical effect of treatment of primary molar teeth with extensive defect using prefabricated metal crowns (PMCs).
目的：观察金属成品冠修复乳磨牙大面积缺损的疗效。
Methods: 76 old people of 218 premolar teeth with wedge-shaped defect were divided into two groups randomly: the teeth were prepared in the first group but not in the second group.
方法：选择相邻的前磨牙楔状缺损患者76例218颗患牙，随机分为2组，第一组修复前预备洞型；第二组修复前不预备洞型。
Methods: 76 old people of 218 premolar teeth with wedge-shaped defect were divided into two groups randomly: the teeth were prepared in the first group but not in the second group.
方法：选择相邻的前磨牙楔状缺损患者76例218颗患牙，随机分为2组，第一组修复前预备洞型；第二组修复前不预备洞型。
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