Tasdemir Tamer, Yesilyurt Cemal, Ceyhanli Kadir Tolga, Celik Davut, Er Kursat
Karadeniz Teknik Universitesi Dis Hekimliği Fakültesi, Trabzon, Turkey.
J Can Dent Assoc. 2009 Apr;75(3):201a-201d.
To determine the percent gutta-percha-filled area in the apical third of root canals after filling with 2 different root filling techniques.
Thirty extracted human lower premolars were instrumented with ProTaper rotary files (Dentsply Maillefer) and then randomly divided into 2 groups of 15 teeth each. The first group was filled using the single-cone technique with a tapered gutta-percha cone. The second group was filled with the lateral condensation technique. Horizontal sections were cut 2 and 4 mm from the apical foramen of each tooth. Photomicrographs of the apical surface of each cross-section were obtained at magnification x40. Digital image analysis was used to measure the overall area of the canal and the aggregate area occupied by gutta-percha; from these values, the percent gutta-percha-filled area was calculated. The data were compared by t test.
The single-cone technique produced significantly greater percent gutta-percha filled area at 2 mm from the apex (p = 0.046), but there was no significant difference between the techniques at 4 mm from the apex (p = 0.17).
These results suggest that the single-cone technique with tapered gutta-percha cones may yield better filling (measured as the percent gutta-percha-filled area) than the lateral condensation technique, at a level 2 mm from the apex.
采用两种不同的根管充填技术充填后，确定根管根尖三分之一处牙胶充填面积的百分比。
30颗拔除的人下颌前磨牙用ProTaper旋转锉（登士柏迈弗公司）进行预备，然后随机分为两组，每组15颗牙。第一组采用单锥技术，用锥形牙胶尖充填。第二组采用侧方加压技术充填。从每颗牙的根尖孔处2毫米和4毫米处制作水平切片。在40倍放大倍数下获取每个横截面根尖表面的显微照片。使用数字图像分析测量根管的总面积和牙胶所占的总面积；根据这些值计算牙胶充填面积的百分比。数据采用t检验进行比较。
在距离根尖2毫米处，单锥技术产生的牙胶充填面积百分比显著更高（p = 0.046），但在距离根尖4毫米处，两种技术之间没有显著差异（p = 0.17）。
这些结果表明，在距离根尖2毫米处，使用锥形牙胶尖的单锥技术可能比侧方加压技术产生更好的充填效果（以牙胶充填面积百分比衡量）。
