口腔锥形束CT对下颌牙种植位点线性测量精度的实验研究
发布时间：2018-07-24 16:41
【摘要】：目的：随着口腔医学的发展与进步,牙种植术由于其独特的优势,日益普及并逐渐成为牙缺失患者首选修复方式。牙种植的全过程离不开影像技术的支持。应用于牙种植中的传统的影像学设备包括根尖片、曲面体层片以及多排螺旋CT等,这些影像学设备由于各种不足无法满足牙种植临床诊疗对影像学的需求。20世纪90年代出现的口腔锥形束CT(CBCT)为口腔种植提供了新的影像学诊查手段。作为一种新兴的影像学设备,CBCT也被广泛地应用于口腔临床诊疗的各个领域,大量学者对CBCT的优劣势进行了相关的研究与探讨。然而,CBCT对牙齿种植位点线距测量的精确性仍然存在一定的争议。本研究将通过模拟CBCT在牙种植术前评估中对下颌牙齿种植位点线距测量的精确性做一验证,探讨CBCT在牙种植中的应用价值,为CBCT在口腔种植中的临床应用提供指导与参考。方法：选取10例无牙颌下颌骨病例,制作实验模型。在下颌骨树脂模型中混入10%硫酸钡,使模型CT值(HU)与天然骨接近。首先在模型骨段上标记测量点,然后用蜡片包绕拟测量位点模型骨段,用牙胶尖在实验模型上标记标志点作为放射标记,确定测量线距以及测量截面。将标记后的模型拍摄CBCT,影像数据导入设备自带的DCTViewer软件测量所标记线距。去除包绕的蜡片及放射标记,根据标记点截开模型骨段,采用游标卡尺直接测量标记线距。数据分为前牙垂直线距、后牙垂直线距、前牙水平线距,后牙水平线距4组。将各组数据的CBCT及游标卡尺对应测量值进行配对样本t检验,P0.05表示差异有统计学意义。结果：CBCT测量前牙垂直线距、后牙垂直线距、前牙水平线距、后牙水平线距均值分别为(21.62±1.87)、(10.66±0.95)、(7.08±0.69)、(10.10±1.80)；游标卡尺测量的相应结果分别为(21.71±1.96)、(10.75±0.90)(7.13±0.65)、 (10.19±1.86)；二者之间差值分别为(-0.0895±0.2200)、(-0.0830±0.1900)、(-0.0520±0.1400)、(-0.0847±0.3200)mm。无论在前牙区或后牙区,水平线距或垂直线距,CBCT测量结果与游标卡尺直接测量结果之间差异无统计学意义(t值分别为-1.784、-1.981、-1.621、-1.684,P值均0.05)。CBCT测量结果与游标卡尺直接测量结果之间无显著差异。结论：在对牙齿种植位点线距的测量方面,CBCT具有较高的可靠性。CBCT能够对下颌任意牙位的骨量高度与厚度数据做出准确评估。CBCT在牙齿种植术前骨量评估中具有很高的应用价值。
[Abstract]:Objective: with the development and progress of stomatology, dental implant is becoming more and more popular and gradually become the first choice for dental defect patients because of its unique advantages. The whole process of dental implant can not be separated from the support of image technology. Traditional imaging devices used in dental implants include apical, curved and multi-slice spiral CT. These imaging equipment can not meet the need of imaging for clinical diagnosis and treatment of dental implants due to various deficiencies. The appearance of oral conical bundle CT (CBCT) in 1990s provides a new method for imaging diagnosis and examination of dental implants. As a new imaging equipment, CBCT is also widely used in various fields of oral clinical diagnosis and treatment. A large number of scholars have studied and discussed the merits and demerits of CBCT. However, the accuracy of CBCT in measuring the distance between implant sites is still controversial. In this study, the accuracy of line distance measurement of mandibular implant sites was verified by simulating CBCT before dental implants, and the application value of CBCT in dental implants was discussed, which provided guidance and reference for clinical application of CBCT in dental implants. Methods: 10 cases of edentulous mandible were selected to make experimental model. 10% barium sulfate was added into the mandibular resin model, which made the CT value of the model close to that of the natural bone. First, the measuring points were labeled on the model bone segment, then the bony segment of the model was wrapped around the wax sheet, and the measuring line distance and the measuring cross section were determined by labeling the mark point on the experimental model with the dental glue tip as the radiolabelling mark. The tagged model was photographed and the image data was imported into the DCTViewer software of the equipment to measure the marked line distance. After removing the wrapped wax and radiating marks, the model bone segment was cut off according to the labeling points, and the marking line distance was measured directly by Vernier caliper. The data were divided into 4 groups: vertical distance of anterior teeth, vertical distance of posterior teeth, horizontal distance of anterior teeth and horizontal distance of posterior teeth. The corresponding values of CBCT and Vernier caliper for each group of data were matched by t-test (P0.05) and the difference was statistically significant. 缁撴灉锛欳BCT娴嬮噺鍓嶇墮鍨傜洿绾胯窛,鍚庣墮鍨傜洿绾胯窛,鍓嶇墮姘村钩绾胯窛,鍚庣墮姘村钩绾胯窛鍧囧，
本文编号：2141997
[Abstract]:Objective: with the development and progress of stomatology, dental implant is becoming more and more popular and gradually become the first choice for dental defect patients because of its unique advantages. The whole process of dental implant can not be separated from the support of image technology. Traditional imaging devices used in dental implants include apical, curved and multi-slice spiral CT. These imaging equipment can not meet the need of imaging for clinical diagnosis and treatment of dental implants due to various deficiencies. The appearance of oral conical bundle CT (CBCT) in 1990s provides a new method for imaging diagnosis and examination of dental implants. As a new imaging equipment, CBCT is also widely used in various fields of oral clinical diagnosis and treatment. A large number of scholars have studied and discussed the merits and demerits of CBCT. However, the accuracy of CBCT in measuring the distance between implant sites is still controversial. In this study, the accuracy of line distance measurement of mandibular implant sites was verified by simulating CBCT before dental implants, and the application value of CBCT in dental implants was discussed, which provided guidance and reference for clinical application of CBCT in dental implants. Methods: 10 cases of edentulous mandible were selected to make experimental model. 10% barium sulfate was added into the mandibular resin model, which made the CT value of the model close to that of the natural bone. First, the measuring points were labeled on the model bone segment, then the bony segment of the model was wrapped around the wax sheet, and the measuring line distance and the measuring cross section were determined by labeling the mark point on the experimental model with the dental glue tip as the radiolabelling mark. The tagged model was photographed and the image data was imported into the DCTViewer software of the equipment to measure the marked line distance. After removing the wrapped wax and radiating marks, the model bone segment was cut off according to the labeling points, and the marking line distance was measured directly by Vernier caliper. The data were divided into 4 groups: vertical distance of anterior teeth, vertical distance of posterior teeth, horizontal distance of anterior teeth and horizontal distance of posterior teeth. The corresponding values of CBCT and Vernier caliper for each group of data were matched by t-test (P0.05) and the difference was statistically significant. 缁撴灉锛欳BCT娴嬮噺鍓嶇墮鍨傜洿绾胯窛,鍚庣墮鍨傜洿绾胯窛,鍓嶇墮姘村钩绾胯窛,鍚庣墮姘村钩绾胯窛鍧囧，
本文编号：2141997
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