Observation of the pulp horn by swept source optical coherence tomography and cone beam computed tomography.
Observation of the pulp horn by swept source optical coherence tomography and cone beam computed tomography.
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通过扫频光学相干断层扫描和锥形束计算机断层扫描观察牙髓角。
DOI：
10.1117/12.2076008
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Suda H
中科院分区：
文献类型：
--
作者：
Iino Y;Yoshioka T;Hanada T;Ebihara A;Sunakawa M;Sumi Y;Suda H
锥束计算机断层扫描（CBCT）是牙科中最有用的诊断技术之一，但它涉及电离辐射，而扫频源光学相干断层扫描（SS-OCT）最近已被引入作为一种无损的，实时的，高分辨率的成像技术，使用低相干干涉测量，它不涉及电离辐射。本研究的目的是评价SS-OCT与CBCT检测髓角（PH）的能力。使用10个提取的人下颌磨牙。水平去除一半牙冠后，使用微焦点计算机断层扫描（Micro CT）（SL）作为金标准，通过CBCT（CL）和SS-OCT（OL）测量从切割的牙本质表面到PH的距离。在SS-OCT图像中，仅当在上覆牙本质下方观察到PH时，记录从切割牙本质表面到PH的距离。如果牙髓暴露，则定义为牙髓暴露（PE）。上述三种方法所得结果采用斯皮尔曼等级相关系数进行统计学分析，显著性水平为p < 0.01。当SL测量的牙本质切割面与PH的距离小于或等于2.33mm时，SS-OCT检测到PH的存在，SL与CL（r=0.87）、SL与OL（r=0.96）、CL与OL（r=0.86）的测量值之间存在较强的相关性。结果表明，SS-OCT图像与CBCT图像密切相关，表明SS-OCT可以作为一种有用的工具来检测PH。
Cone-beam computed tomography (CBCT) is one of the most useful diagnostic techniques in dentistry but it involves ionizing radiation, while swept source optical coherence tomography (SS-OCT) has been introduced recently as a nondestructive, real-time, high resolution imaging technique using low-coherence interferometry, which involves no ionizing radiation. The purpose of this study was to evaluate the ability of SS-OCT to detect the pulp horn (PH) in comparison with that of CBCT. Ten extracted human mandibular molars were used. After horizontally removing a half of the tooth crown, the distance from the cut dentin surface to PH was measured using microfocus computed tomography (Micro CT) (SL) as the gold standard, by CBCT (CL) and by SS-OCT (OL). In the SS-OCT images, only when PH was observed beneath the overlying dentin, the distance from the cut dentin surface to PH was recorded. If the pulp was exposed, it was defined as pulp exposure (PE). The results obtained by the above three methods were statistically analyzed by Spearman's rank correlation coefficient at a significance level of p < 0.01. SS-OCT detected the presence of PH when the distance from the cut dentin surface to PH determined by SL was 2.33 mm or less. Strong correlations of the measured values were found between SL and CL (r=0.87), SL and OL (r=0.96), and CL and OL (r=0.86). The results showed that SS-OCT images correlated closely with CBCT images, suggesting that SS-OCT can be a useful tool for the detection of PH.