Methods: The 46 cases of HCPH were divided into two groups randomly.
方法：46例门静脉高压征患者随机分成两组。
Methods 297 canals of 147 patients with 163 teeth were divided into two groups randomly.
方法选择需进行根管治疗者147人163颗牙297个根管，随机分为两组。
Method:40 curved mesial-buccal canals in mandibular molars were selected and divided into two groups randomly. Each group had 20 canals.
方法：选取40个下颌磨牙近中颊侧弯曲根管，随机分为两组，每组20个根管。
Methods 61 emergency surgery patients were divided into two groups randomly, with the intervention group 31cases and the control group 30 cases.
方法将61例急诊手术病人随机分成两组，分别为干预组31例和对照组30例。
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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