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传统观点认为:超声锉根管预备产生的热会显著增强次氨酸钠根管冲洗液的灭菌和溶解有机物等能力,但其产热情况,迄今尚缺定量研究。为此,作者用Cavi-Endo超声仪和离体人牙做了如下实验:10个根尖发育完全的尖牙,常规制备开髓孔。以2.5%次氯酸钠液为冲洗液,用手持K型锉扩大根管至80号,用球钻敞开根尖孔后浸入生理盐水中备用。实验所用的温度测量装置是铜-康铜温差电偶(a copper-onstaxt-
The traditional view is that: the heat generated by ultrasonic file root canal preparation will significantly enhance the ability of the sodium nitroprusside root canal rinse solution to sterilize and dissolve organic matter, but its heat production has not yet been studied quantitatively. To this end, the author used the Cavi-Endo system and isolated human teeth to do the following experiments: Ten root tips developed fully canine, the conventional preparation of open pulp hole. To 2.5% sodium hypochlorite solution for the rinse, with a hand-held K-type file to expand the root canal to No. 80, open the apical hole with a ball drill immersed in saline for use. The temperature measurement device used in the experiment is a copper-onstaxt-