本文選題：錐形束CT　切入點(diǎn)：數(shù)字化X線成像法　出處：《口腔醫(yī)學(xué)研究》2017年01期 　論文類型：期刊論文

【摘要】：目的:對(duì)比CBCT法與數(shù)字化X線成像法(RVG)對(duì)下頜恒切牙根管形態(tài)評(píng)估的差異。方法:對(duì)101顆離體牙進(jìn)行唇舌向及近遠(yuǎn)中向數(shù)字化X線片拍攝和CBCT高清牙列模式掃描,對(duì)圖像進(jìn)行根管數(shù)目、Vertucci根管分型、根管鈣化和根尖口開口位置的評(píng)估,并通過CBCT圖像建立偏角度投照的三角函數(shù)模型,計(jì)算偏向投照的角度。結(jié)果:CBCT法顯示有30顆為雙根管,RVG近遠(yuǎn)中向投照顯示有36顆為雙根管,卡方檢驗(yàn)顯示對(duì)根管數(shù)目和Vertucci根管分型兩種方法均具有顯著性差異(P0.05)。兩種方法對(duì)根管鈣化和根尖口開口位置的評(píng)估均不具有顯著性差異。30顆雙根管牙中下頜恒切牙唇舌向雙根管的最大距離(LaL)在0~1.5 mm之間的,85.7%的為Vertucci III型,LaL在1.5~2mm之間的,66.7%為Vertucci IV和V型。以根尖片上雙根管顯示距離為1mm計(jì)算,LaL在1~2mm之間的,偏向投照角度為26.6°~45.0°,LaL在0.1~1mm之間的,偏向投照角度為45.0°~84.3°。結(jié)論:CBCT高清牙列模式掃描和RVG投照對(duì)于根管數(shù)目和Vertucci根管分型的評(píng)估具有顯著性差異,對(duì)于根管鈣化和根尖口開口位置的評(píng)估不具有顯著性差異。LaL在1~2 mm之間時(shí),偏角度投照的臨床可操作性較強(qiáng)。
[Abstract]:Objective: to compare the difference between CBCT and digital radiography in evaluating the root canal morphology of mandibular incisors. Methods: 101 isolated teeth were scanned by digital radiography and CBCT high-definition dentition mode. The root canal classification, root canal calcification and the location of the apical orifice were evaluated. The trigonometric function model of biased angle projection was established by CBCT image. Results 30 of 30 RVG were shown to be double root canal RVG and 36 of them were double root canals. Chi-square test showed that there were significant differences in the number of root canals and the classification of Vertucci root canals. There was no significant difference between the two methods in evaluating the calcification of root canals and the location of apical orifice. There was no significant difference between the two methods in evaluating the permanent mandibular incisors in 30 double root canals. The maximum distance to double root canal of lip and tongue was 85.7% in the range of 0 ~ 1.5 mm. Vertucci IV and V type were found in 66.7% of the cases with Vertucci III type Lal between 1.5 mm and 2 mm. The distance of the two root canals on the apical film was 1 mm and the distance between Lal and Lal was 12 mm. The biased projection angle was 26.6 擄/ 45.0 擄/ L and the bias angle was 45.0 擄/ 84.3 擄respectively. Conclusion there is significant difference in the number of root canals and the classification of Vertucci root canal by RVG and high-definition dentition mode scanning. There was no significant difference in the assessment of root canal calcification and the location of apical orifice. When Lal was between 1mm and 2mm, the clinical maneuverability of angle projection was stronger.
【作者單位】： 南京大學(xué)醫(yī)學(xué)院附屬口腔醫(yī)院預(yù)防口腔科;南京大學(xué)醫(yī)學(xué)院附屬口腔醫(yī)院口腔頜面醫(yī)學(xué)影像科;
【基金】：江蘇省自然科學(xué)基金(編號(hào):BK20150089,BK20141083) 南京市醫(yī)學(xué)科技發(fā)展項(xiàng)目(編號(hào):ZKX14049,YKK15116) 南京市衛(wèi)生青年人才(編號(hào):QRX11264)
【分類號(hào)】：R781.05

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