■确定工作长度(WL)对于根管治疗(RCT)的成功结果是必要的。WL确定中的常见方法包括触觉,射线照相,和电子顶点定位器(EAL)。
■这项研究的目的是将三种WL测定方法与根尖收缩(AC)的实际可视化进行比较。
■加纳大学牙科学校诊所连续接受单根单管牙拔除指征的患者随机分为三组。体内根管WL由触觉决定,数字射线照相,和第五代EAL(SendolineS5)。体内测量后,将文件固定在运河中。修剪根尖的4-5mm以暴露插入的文件和AC。实际WL,由AC的可视化决定,是用数码显微镜完成的。然后比较了不同组的不同WL,并报告了平均实际运河长度。
■EAL准确预测了31颗(96.9%)牙齿的AC,虽然数字射线照相和触觉感觉方法准确地预测了19颗(59.4%)和8颗(25%)牙齿的收缩,分别,在研究人群中。单根牙齿的平均工作管长在性别之间没有观察到的差异,年龄类别,和下巴的一侧。
■EAL为加纳人的单根牙齿提供了更可靠,更准确的WL测量,与数字射线照相和触觉方法相比。
UNASSIGNED: Determination of working length (WL) is necessary for the successful outcome of root canal treatment (RCT). Common methods in WL determination include tactile, radiographic, and electronic apex locators (EAL).
UNASSIGNED: The aim of this study was to compare three methods of WL determination to the actual visualization of the apical constriction (AC).
UNASSIGNED: Consecutive patients with indications for extraction of single-rooted single canal teeth at the University of Ghana Dental School clinic were randomly assigned to three groups. In-vivo root canal WL was determined by tactile sensation, digital radiography, and a 5th generation EAL (Sendoline S5). Files were cemented in the canals after the in-vivo measurements. The apical 4-5 mm of the roots was trimmed to expose the inserted files and the AC. Actual WL, as determined by visualization of the AC, was done using a digital microscope. Different WLs were then compared for the various groups, and the mean actual canal lengths were reported.
UNASSIGNED: EAL accurately predicted the AC in 31 (96.9%) teeth, while the digital radiographic and tactile sensation methods accurately predicted the constriction in 19 (59.4%) and 8 (25%) teeth, respectively, in the study population. The mean working canal lengths for single-rooted teeth showed no observable difference among sexes, age categories, and side of the jaw.
UNASSIGNED: The EAL provided more reliable and accurate WL measurements for single-rooted teeth among Ghanaians, compared to digital radiography and tactile methods.