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1996～1999年,作者用银汞合金充填Ⅱ类洞300个患牙,取得了较为满意的疗效,但有22例失败病例,其中男7例,女15例;年龄16～55岁;牙位:双尖牙5例,第一磨牙13例,第二磨牙4例。 22例失败原因分析如下: ①牙髓炎:1例。常见的原因有:龋坏组织未去干净,备洞时产热过多;深龋使用刺激性较强的药物消毒,垫底充填材料使用不当;对已有牙髓病变未作出正确判断误当深龋处理而直接充填。为防止在龋病治疗后发生牙髓炎,首先应针
From 1996 to 1999, the author used silver-amalgam to fill 300 teeth of Class II holes and achieved satisfactory results. However, there were 22 cases of failure, including 7 males and 15 females, aged from 16 to 55 years old. : Bifidus in 5 cases, the first molar in 13 cases, the second molar in 4 cases. 22 cases of failure analysis as follows: ① pulpitis: 1 case. Common causes are: carious tissue did not go clean, too much heat when the hole is prepared; deep caries use strong irritant drug disinfection, improper use of the bottom filling material; Caries treatment and direct filling. In order to prevent the occurrence of dental pulpitis after caries treatment, the first should be needle