Department of Pedodontics, Faculty of Dentistry, Haci Bektaş Veli University, 50040 Nevşehir, Turkey.
Department of Pedodontics, Faculty of Dentistry, Erciyes University, 38039 Kayseri, Turkey.
J Clin Pediatr Dent. 2023 Nov;47(6):150-154. doi: 10.22514/jocpd.2023.089. Epub 2023 Nov 3.
This study compared the accuracy of Root ZX mini apex locator in presence of sodium hypochlorite (NaOCl) in primary molars with and without apical resorption. Sixty-four extracted primary lower molar teeth with 32 root resorption and 32 without resorption were selected. To determine the actual working length (AWL), a K-file was inserted into the root canal until the tip of the file was visible at the major foramen or the resolution level. It was then withdrawn 1 mm. This value was recorded as AWL. The teeth were then divided subgroups (with/without NaOCl). To determine the electronic working length, a Root ZX mini apex locator in canals with/without NaOCl was used. A K-file was inserted into the canal to just beyond the foramen, as indicated by the flashing "APEX" bar, and the electronic working length was determined by subtracting 1 mm from this length. The deviation of the Root ZX mini measurement from the AWL was determined. Student's -test was used for statistical analysis. In teeth with no resorption, the measurement accuracy rates (within+/-0.5 mm) of non-NaOCl and NaOCl groups were 84.37% and 81.25%, respectively ( > 0.05); within+/-1 mm, the non-NaOCl and NaOCl demonstrated 100% and 96.87% accuracy, respectively ( > 0.05). In teeth with resorption, the measurement accuracy rates (within+/-0.5 mm) was 81.25% for the non-NaOCl and 62.50% for the NaOCl, respectively ( < 0.05). The measurement accuracy rates (within+/-1 mm) of the non-NaOCl and NaOCl was 96.87% and 84.37%, respectively ( < 0.05). The presence of NaOCl in the root canal affected the accuracy of the Root ZX mini in primary teeth with apical resorption, but not in teeth without resorption.
本研究比较了在有和没有根尖吸收的情况下，次氯酸钠（NaOCl）存在时 Root ZX mini 根尖定位仪在初级磨牙中的准确性。选择了 64 颗提取的初级下颌磨牙，其中 32 颗有根尖吸收，32 颗没有根尖吸收。为了确定实际工作长度（AWL），将 K 锉插入根管，直到锉尖在主孔或分辨率水平可见。然后将其撤回 1 毫米。将此值记录为 AWL。然后将牙齿分为亚组（有/无 NaOCl）。为了确定电子工作长度，在有/无 NaOCl 的根管中使用了 Root ZX mini 根尖定位仪。将 K 锉插入根管，直到指示“APEX”闪烁的锉尖超过孔口，然后从该长度减去 1 毫米以确定电子工作长度。确定了 Root ZX mini 测量值与 AWL 的偏差。使用 Student's -test 进行统计分析。在没有吸收的牙齿中，非 NaOCl 和 NaOCl 组的测量精度率（在+/-0.5 毫米内）分别为 84.37%和 81.25%（> 0.05）；在+/-1 毫米内，非 NaOCl 和 NaOCl 的准确度分别为 100%和 96.87%（> 0.05）。在有吸收的牙齿中，非 NaOCl 的测量精度率（在+/-0.5 毫米内）为 81.25%，NaOCl 为 62.50%（< 0.05）。非 NaOCl 和 NaOCl 的测量精度率（在+/-1 毫米内）分别为 96.87%和 84.37%（< 0.05）。根管中存在 NaOCl 会影响 Root ZX mini 在有根尖吸收的初级牙齿中的准确性，但对没有根尖吸收的牙齿没有影响。
