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对根管塑化（简称根塑）治疗后因疼痛而失败的病例进行超声根管治疗，并对其根塑后引起疼痛的原因进行分析，以期发现导致根塑失败的原因和超声根管对根塑失败治疗的临床价值．临床资料１病例收集：收集本院内科自１９９５年１月～１９９７年１月因根塑后疼痛而失败的病例...
Root canal plasticization (referred to as root plastic) after the failure of the treatment of pain due to root canal treatment of root canal and plastic root causes of pain caused by the analysis, in order to find the cause of root plastic failure and root canal ultrasound The clinical value of root plastic failure treatment. Clinical data 1 Case collection: collection of hospital medical department from January 1995 to January 1997 after the failure of root plastic surgery cases ...