Apices of maxillary premolars observed by swept source optical coherence tomography

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

doi:10.1117/12.2076924

24 February 2015 Apices of maxillary premolars observed by swept source optical coherence tomography

Arata Ebihara D.D.S., Yoshiko Iino D.D.S., Toshihiko Yoshioka D.D.S., Takahiro Hanada 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; 93060J (2015) https://doi.org/10.1117/12.2076924
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

Apicoectomy is performed for the management of apical periodontitis when orthograde root canal treatment is not possible or is ineffective. Prior to the surgery, cone beam computed tomography (CBCT) examination is often performed to evaluate the lesion and the adjacent tissues. During the surgical procedure, the root apex is resected and the resected surface is usually observed under dental operating microscope (DOM). However, it is difficult to evaluate the details and the subsurface structure of the root using CBCT and DOM. A new diagnostic system, swept source optical coherence tomography (SS-OCT), has been developed to observe the subsurface anatomical structure. The aim of this study was to observe resected apical root canals of human maxillary premolars using SS-OCT and compare the findings with those observed using CBCT and DOM. Six extracted human maxillary premolars were used. After microfocus computed tomography (Micro CT; for gold standard) and CBCT scanning of the root, 1 mm of the apex was cut perpendicular to the long axis of the tooth. Each resected surface was treated with EDTA, irrigated with saline solution, and stained with methylene blue dye. The resected surface was observed with DOM and SS-OCT. This sequence was repeated three times. The number of root canals was counted and statistically evaluated. There was no significant difference in the accuracy of detecting root canals among CBCT, DOM and SS-OCT (p > 0.05, Wilcoxon test). Because SS-OCT can be used in real time during surgery, it would be a useful tool for observing resected apical root canals.

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Arata Ebihara D.D.S., Yoshiko Iino D.D.S., Toshihiko Yoshioka D.D.S., Takahiro Hanada D.D.S., Mitsuhiro Sunakawa D.D.S., Yasunori Sumi D.D.S., and Hideaki Suda D.D.S. "Apices of maxillary premolars observed by swept source optical coherence tomography", Proc. SPIE 9306, Lasers in Dentistry XXI, 93060J (24 February 2015); https://doi.org/10.1117/12.2076924

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