Hagay Shemesh

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Colin Robinson

University of Leeds

Oleg Yu Vorobyev

Siberian Federal University

David Seamon

Kansas State University

Remo Caponi

University of Cologne

Dimitrios Koutroumpas

National & Kapodistrian University of Athens

Lamine Anne-Sophie

Université de Strasbourg

Rony Christian Hidalgo

Universidad Peruana Cayetano Heredia

Catur Atmaji

Universitas Gadjah Mada (Yogyakarta)

Maria Georgopoulou

National & Kapodistrian University of Athens

Charu Uppal

University of Gothenburg

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Papers by Hagay Shemesh

Optical coherence tomography for endodontic imaging

SPIE Proceedings, 2008

Endodontic applications of endoscopic optical coherence tomography

A Central Incisor with 4 Independent Root Canals: A Case Report

by Hagay Shemesh and Carlos Portoles

Journal of Endodontics, 2015

The maxillary central incisor is the tooth with the least anatomic variations. Despite the fact t... more The maxillary central incisor is the tooth with the least anatomic variations. Despite the fact that several studies have reported a prevalence of 100% for the presence of a single canal, root canal aberrations of maxillary central incisors with up to 3 canals have also been reported. Such cases represent both a diagnostic and technical challenge to the clinician. The present case describes root canal treatment performed in a maxillary central incisor with 4 canals. The detection of all canals was achieved by examination of the pulp chamber floor with the help of the dental operating microscope as well as careful examination of intraoral radiographs. The canals were prepared with hand and rotary instruments and obturated with a warm gutta-percha technique. The present report is the first to describe a maxillary central incisor with 4 canals in a tooth with no developmental abnormalities. It stresses the importance of using a dental operating microscope during endodontic treatment as well as questioning the routine use of cone-beam computed tomographic imaging for similar cases.

Accuracy of Cone-beam Computed Tomography in the Detection of a Second Mesiobuccal Root Canal in Endodontically Treated Teeth: An Ex Vivo Study

by H. Mirmohammadi, Hagay Shemesh, Poerya Partovi, and B. Hassan

Journal of Endodontics, 2015

Introduction: There is a high incidence of a second mesiobuccal root canal (MB2) in maxillary mol... more Introduction: There is a high incidence of a second mesiobuccal root canal (MB2) in maxillary molars. The study aim is to assess the accuracy of cone-beam computed tomographic (CBCT) imaging in detecting a second mesiobuccal root canal in endodontically treated maxillary molars. Methods: The study sample consisted of 60 extracted maxillary molars, which were endodontically opened and examined under a dental operating microscope for the presence of an MB2. The teeth were then further examined using micro-computed tomographic imaging as the gold standard. Root canals were filled (except the MB2) and were then subdivided into an experimental and a control group. After fixing the teeth in a dry human skull, they were scanned using CBCT imaging (Ac-cuiTomo 170; Morita Inc, Tarumi-cho Suita City, Osaka, Japan). The observers for this study were 2 experienced radiologists blinded to the group allocation of controls and experiments; they evaluated the images twice independently. Sensitivity, specificity, and accuracy were calculated as well as the kappa values for both interand intraobserver agreement. Results: From 30 teeth, which were diagnosed without an MB2 under examination with a dental operating microscope, 6 teeth proved to have an MB2 using mCT (20%). Intraobserver reliability was high for both observers 1 (R = 0.85) and 2 (R = 0.96). Interobserver reliability as assessed by the Cohen kappa was excellent (R = 0.89). CBCT sensitivity for detecting an MB2 was 96%, specificity was 100%, and total accuracy was 98%. Conclusions: CBCT imaging is a suitable diagnostic technique for detecting a missed MB2 in endodontically treated teeth. (J Endod 2015;-:1-4)

Hagay Shemesh

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