Application of Optical Coherence Tomography to Identify Pulp Exposure During Access Cavity Preparation Using an Er:YAG Laser

Ding, Jiangfeng; Ebihara, Arata; Watanabe, Satoshi; Iino, Yoshiko; Kokuzawa, Chizuko; Anjo, Tomoo; Suda, Hiroshi; Sumi, Yasunori

doi:10.1089/pho.2013.3688

Cited by 15 publications

(6 citation statements)

References 17 publications

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“…Micro-CT was used as a reference standard. Up to our knowledge, DM results have not yet been compared to micro-CT results before, while micro-CT has been used as a reference standard to evaluate OCT results in several studies [26,27]. The Spearman correlation between DM and OCT was low in addition to the low sensitivity and specificity of OCT. McNemar's test showed a significant difference between DM and OCT. One reason for the lower performance of OCT may be that the resolution of OCT was not high enough, resulting in somewhat blurred images without clear borderlines.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Crack Formation and Propagation with Ultrasonic Root-End Preparation and Obturation Using a Digital Microscope and Optical Coherence Tomography

et al. 2019

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Objective. This study is aimed at determining (1) the effect of root-end resection, ultrasonic root-end preparation, and root-end filling on the incidence of crack formation and propagation by using a digital microscope (DM) and optical coherence tomography (OCT) and (2) the performance of OCT on the detection of cracks by comparing with microcomputed tomography (micro-CT) as a reference standard. Methodology. Thirty extracted lower incisors were endodontically treated and subjected to root-end resection and ultrasonic root-end cavity preparation. Then, the teeth were divided into three groups (n=10, each), and the root-end cavity was either left unfilled or filled with mineral trioxide aggregate (MTA) or super-EBA. The resected surface was observed with OCT and DM after the root-end resection, ultrasonic root-end preparation, and root-end filling, and the frequency of incomplete and complete cracks were recorded. The observation was repeated after two weeks, one month, and two months, and micro-CT scans after two months were taken as the gold standard. Results. The DM results show dentinal crack formation in 47% of the samples following root-end resection and in 87% following ultrasonic preparation. After the ultrasonic preparation, no existing crack propagated to a complete crack, but new cracks were formed. MTA and super-EBA had no effect on crack formation. The Spearman correlation coefficient between OCT and DM was 0.186 (very weak correlation; p=0.015). Sensitivity and specificity in comparison to micro-CT were 0.50 and 0.55 in OCT and 1.00 and 0.35 in DM, respectively. McNemar’s test showed a significant difference between OCT and DM (p<0.05). Conclusion. Apical resection and ultrasonic preparation could form dentinal cracks. OCT and DM showed different detection frequencies of cracks with very weak correlation. DM showed superior sensitivity compared with OCT.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Crack Formation and Propagation with Ultrasonic Root-End Preparation and Obturation Using a Digital Microscope and Optical Coherence Tomography

et al. 2019

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“…Since OCT has the ability to detect tiny objects, the applications of the OCT in the field of dentistry have been studied [1,3,4,16]. Also, it could potentially be applied to provide detailed information about tooth cracks, such as micro-fractures, and may thus be a powerful noninvasive and reversible method of diagnosing cracked-tooth syndrome.…”

Section: Introductionmentioning

confidence: 99%

Dental optical coherence tomography: new potential diagnostic system for cracked-tooth syndrome

Lee

Chung

et al. 2015

Surg Radiol Anat

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“…SL was defined as the gold standard in this study, because section images were obtained non-destructively. Previous studies have reported the maximum dentin thickness penetrable by SS-OCT laser as <1.69 mm [5][6][7]9 . Other studies have reported the depth range of SS-OCT imaging in dental hard tissues as approximately 2.0 mm 10 .…”

Section: Discussionmentioning

confidence: 96%

“…As noted above, radiographic procedures possess some limitations. A few studies suggested that SS-OCT might detect the pulp dentin complex 5,6 . It has been reported that, using CT as a gold standard, spectral-domain OCT (SD-OCT), a type of OCT often employed in ophthalmology, successfully detected the pulp dentin complex 7 .…”

Section: Introductionmentioning

confidence: 99%

Observation of the pulp horn by swept source optical coherence tomography and cone beam computed tomography

et al. 2015

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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.

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Application of Optical Coherence Tomography to Identify Pulp Exposure During Access Cavity Preparation Using an Er:YAG Laser

Abstract: Objective: The study aimed to evaluate the ability of optical coherence tomography (OCT) to guide and identify pulp exposure using an erbium: yttrium-aluminum-garnet (Er:YAG) laser.

Cited by 15 publications

References 17 publications

Evaluation of Crack Formation and Propagation with Ultrasonic Root-End Preparation and Obturation Using a Digital Microscope and Optical Coherence Tomography

Evaluation of Crack Formation and Propagation with Ultrasonic Root-End Preparation and Obturation Using a Digital Microscope and Optical Coherence Tomography

Dental optical coherence tomography: new potential diagnostic system for cracked-tooth syndrome

Observation of the pulp horn by swept source optical coherence tomography and cone beam computed tomography

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