Kazemipoor Maryam, Sabaghzadegan Farinaz, Ezoddini Ardakani Fatemeh
Department of Endodontics, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Social Determinants of Oral Health Research Center, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Iran Endod J. 2019 Fall;14(4):259-264. doi: 10.22037/iej.v14i4.24188.
INTRODUCTION: Health of periapical tissues has been considered as an index for the evaluation of endodontic outcomes. The present study sought to assess the pattern of periapical lesion extension in anterior teeth using cone-beam computed tomography (CBCT). METHODS AND MATERIALS: In this descriptive study' 199 CBCT images belonged to patients aging from 15 to 79 were assessed according to periapical lesion extension in the regions of maxillary and mandibular anterior teeth. Maximum periapical lesion extensions in three orthogonal planes were measured and recorded in millimeters and were assessed according to age' gender' dental arch and tooth type. Statistical analysis was performed using percentages' repeated measure ANOVA and Bonferroni tests. The significant level was set at 0.05. RESULTS: The highest average of lesion extension, in both maxilla and mandible, was in vertical dimension' followed by horizontal buccolingual and horizontal mesiodistal dimensions' respectively. There were significant differences between the vertical and mesiodistal (=0.004) and also mesiodistal and buccolingual (=0.010) periapical lesion extension dimensions. In addition, there were significant differences in maxilla and mandible (=0.012). In maxilla, there were no significant differences between the three tooth types (=0.346) but in the mandibular arch, there were significant differences between central-canine (=0.004) and lateral-canine (=0.026). According to independent variables, only gender had a significant effect on the lesion extension in anterior regions of maxilla and mandible (=0.001). The periapical lesion extensions were significantly higher in men compared with women. CONCLUSIONS: The bone destruction_as a consequence of periapical inflammatory process_ was greatest in the vertical, and lowest in the horizontal mesiodistal dimensions. That way, the extension in buccolingual dimension, which could not be detected in the 2-D imaging techniques, was rather high in the present study. Thus CBCT, as a 3-D imaging technique, could be recommended for the precise evaluation of lesion extension in the periapical area.
引言：根尖周组织的健康状况一直被视为评估牙髓治疗效果的一个指标。本研究旨在使用锥形束计算机断层扫描（CBCT）评估前牙区根尖周病变的扩展模式。 方法和材料：在这项描述性研究中，根据上颌和下颌前牙区的根尖周病变扩展情况，对199例年龄在15至79岁患者的CBCT图像进行了评估。测量并记录了三个正交平面上的最大根尖周病变扩展，以毫米为单位，并根据年龄、性别、牙弓和牙型进行评估。使用百分比、重复测量方差分析和Bonferroni检验进行统计分析。显著性水平设定为0.05。 结果：在上颌和下颌中，病变扩展的平均最大值在垂直方向上最高，其次分别是水平颊舌向和水平近远中向。根尖周病变扩展的垂直方向与近远中方向（=0.004）以及近远中方向与颊舌向（=0.010）之间存在显著差异。此外，上颌和下颌之间也存在显著差异（=0.012）。在上颌中，三种牙型之间没有显著差异（=0.346），但在下颌牙弓中，中切牙（=0.004）和侧切牙（=0.026）之间存在显著差异。根据自变量，只有性别对上颌和下颌前牙区的病变扩展有显著影响（=0.001）。男性的根尖周病变扩展明显高于女性。 结论：根尖周炎症过程导致的骨破坏在垂直方向上最大，在水平近远中方向上最小。这样，在二维成像技术中无法检测到的颊舌向扩展在本研究中相当高。因此，作为一种三维成像技术，CBCT可推荐用于精确评估根尖周区域病变的扩展。
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