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

Yoshiko Iino D.D.S.; Toshihiko Yoshioka D.D.S.; Takahiro Hanada D.D.S.; Arata Ebihara D.D.S.; Mitsuhiro Sunakawa D.D.S.; Yasunori Sumi D.D.S.; Hideaki Suda D.D.S.

doi:10.1117/12.2076008

24 February 2015 Observation of the pulp horn by swept source optical coherence tomography and cone beam computed tomography

Yoshiko Iino D.D.S., Toshihiko Yoshioka D.D.S., Takahiro Hanada D.D.S., Arata Ebihara D.D.S., Mitsuhiro Sunakawa D.D.S., Yasunori Sumi D.D.S., Hideaki Suda D.D.S.

Author Affiliations +

Proceedings Volume 9306, Lasers in Dentistry XXI; 93060I (2015) https://doi.org/10.1117/12.2076008
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

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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Yoshiko Iino D.D.S., Toshihiko Yoshioka D.D.S., Takahiro Hanada D.D.S., Arata Ebihara D.D.S., Mitsuhiro Sunakawa D.D.S., Yasunori Sumi D.D.S., and Hideaki Suda D.D.S. "Observation of the pulp horn by swept source optical coherence tomography and cone beam computed tomography", Proc. SPIE 9306, Lasers in Dentistry XXI, 93060I (24 February 2015); https://doi.org/10.1117/12.2076008

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