Ceyhanli K Tolga, Turkun Murat, Erdilek Necdet, Peskersoy Cem, Kose Timur
Department of Endodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkiye.
Department of Restorative Dentistry, Faculty of Dentistry, Ege University, Izmir, Turkiye.
Eur J Dent. 2013 Sep;7(Suppl 1):S041-S044. doi: 10.4103/1305-7456.119070.
The aim of this study was to evaluate the apical root canal adaptation performance of various root canal instruments.
A total of 40 freshly extracted single-rooted mandibular incisors were used in this study. Coroner parts of all teeth were removed from cemento-enamel junction and root canal of each tooth was explored with a size 8 K-file until the tip of the file was just visible at the apex. Working lengths (WLs) were determined as 1 mm short of these measurements. ProTaper, K-file, profile and hedstroem files were inserted into the root canals of 10 teeth to the WL following the flaring of the coronal and middle thirds. Instruments were fixed in the root canals with acrylic resin. The apical 1 mm of each root tip was ground on wet sandpaper to expose the canal and the instrument at the WL and the apical region of each tooth was examined under stereomicroscope. The stereoscopic images of the teeth were digitized and analyzed with software in order to determine the differences between the areas of root canals and file tips. Result data were analyzed using the one-way analysis of variance test (P = 0.05).
There were no significant differences between apical file/root canal areas of the evaluated instruments (P > 0.05).
None of the evaluated instruments performed a perfect adaptation with the apical root canal surface at the WL in mandibular incisors. Therefore, total removal of the debris from the apical canal surface may not be achieved when these filing instruments are used.
本研究旨在评估各种根管器械的根尖根管适配性能。
本研究共使用了40颗新鲜拔除的单根下颌切牙。将所有牙齿的冠方部分从牙骨质-釉质界处去除，并用8号K锉探查每颗牙齿的根管，直至锉尖在根尖处刚刚可见。工作长度（WL）确定为比这些测量值短1mm。在对冠部和中部三分之一进行扩管后，将ProTaper、K锉、Profile和Hedstroem锉插入10颗牙齿的根管至工作长度。器械用丙烯酸树脂固定在根管内。将每个根尖的根尖1mm在湿砂纸上打磨，以暴露根管和工作长度处的器械，并在体视显微镜下检查每颗牙齿的根尖区域。将牙齿的立体图像数字化并用软件进行分析，以确定根管面积和锉尖面积之间的差异。结果数据采用单因素方差分析检验（P = 0.05）进行分析。
所评估器械的根尖锉/根管面积之间无显著差异（P > 0.05）。
在本研究中，所评估的器械在单根下颌切牙的工作长度处均未与根尖根管表面实现完美适配。因此，当使用这些锉器械时，可能无法完全清除根尖根管表面的碎屑。
