OBJECTIVES The aim of this study was to determine the frequency and quality of root canal fillings (RCF) and the prevalence of apical radiolucency (AR) in a German population. MATERIAL AND METHODS Five hundred randomly selected full-size CBCT images (Planmeca ProMax 3D, FOV = 8 × 8 cm, voxel size 160 μm or 200 μm) were obtained from German patients (40.6% = ♂; 59.4% = ♀; mean age = 50.21 ± 12.45 years). A total of 8254 teeth were examined for pathology (AR, widened periodontal ligament). The relationship between AR and existing RCF and the quality of RCF were documented. Frequency and correlations between the left and right sides and gender distribution were analyzed statistically using the chi-square test. RESULTS The overall prevalence of AR was 3.8%, whereas for teeth with RCF, it was 42.5%. Patients had approximately 1.4 root canal-filled teeth (8.2% of all teeth). RCF terminated more than 2 mm short of the radiological apex in 31.2%, 5.1% reached beyond the apex, 8.1% were associated with extruded sealer, and 5.3% presented untreated root canals. Odds ratio of having an AR was highest in teeth with RCF beyond the apex (OR = 27.0) followed by RCF <2 mm short of the apex (OR = 4.4), untreated root canals (OR = 2.9), and inhomogeneity of RCF (OR = 1.2). Extrusion of sealer was least associated with AR. Molars were most frequently associated with AR (P < 0.05). Root canal-filled teeth showed significantly more AR in men compared with women (P < 0.05). CONCLUSIONS About 42.5% of root canal-filled teeth were associated with AR, and in about one-third of these teeth, the RCF terminated more than 2 mm short of the apex. CLINICAL RELEVANCE Each step in root canal therapy influences treatment outcome and prevalence of periapical radiolucencies. Determination of the working length is still one of the key points to achieve predictable periapical healing, and homogenous root canal filling reaching the foramen major seems to be essential.

中文翻译：

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德国人口的根管充填质量和根尖射线不透性患病率：CBCT分析。

目的本研究的目的是确定德国人群中根管充填的频率和质量（RCF）以及根尖射线透性（AR）的患病率。材料与方法从德国患者中获得了五百份随机选择的全尺寸CBCT图像（Planmeca ProMax 3D，FOV = 8×8 cm，体素尺寸为160μm或200μm）（40.6％=♂； 59.4％=♀；平均年龄） = 50.21±12.45年）。总共检查了8254颗牙齿的病理（AR，牙周膜变宽）。记录了AR与现有RCF之间的关系以及RCF的质量。使用卡方检验对左侧和右侧与性别分布之间的频率和相关性进行统计分析。结果AR的总体患病率为3.8％，而带有RCF的牙齿的患病率为42.5％。患者大约有1。4根充满根管的牙齿（占所有牙齿的8.2％）。RCF终止于距放射顶点不到2毫米的地方，占31.2％，超出顶点的占5.1％，与挤压封闭剂相关的占8.1％，未治疗的根管占5.3％。RCF超过根尖的牙齿中具有AR的几率最高（OR = 27.0），然后是根尖小于2 mm的RCF（OR = 4.4），未处理的根管（OR = 2.9）和RCF的不均匀性（ OR = 1.2）。封口机的挤出与AR最少相关。臼齿最常与AR相关（P <0.05）。男性相比女性，根管充盈的牙齿显示出明显更高的AR（P <0.05）。结论大约42.5％的根管充填牙齿与AR相关，并且在其中大约三分之一的牙齿中，RCF终止于距顶端不到2 mm处。临床相关性根管治疗的每个步骤都会影响治疗结果和根尖周放射透明性的患病率。确定工作长度仍然是实现可预测的根尖周愈合的关键点之一，并且均匀的根管充填达到大孔似乎是必不可少的。