Oral Biol Res 2019; 43(2): 148-154  https://doi.org/10.21851/obr.43.02.201906.148
Non-surgical treatment of large periapical lesions
Kyoung-Hwa Jung1 ,2, Eun-Young Kwon1 , So-Yeun Kim1 , Hye-Mi Jeon1 , Youn-Kyung Choi1 , Sung-Ae Son2 , Jeong-Kil Park2*
1Dental Clinic Center, Pusan National University Hospital, Busan, Korea 
2Department of Conservative Dentistry, School of Dentistry, Pusan National University, Yangsan, Korea
Correspondence to: Jeong-Kil Park, Department of Conservative Dentistry, School of Dentistry, Pusan National University, 20 Geumo-ro, Mulgeum-eup, Yangsan 50612, Korea. Tel: +82-55-360-5221, Fax: +82-55-360-5214, E-mail: jeongkil@pusan.ac.kr
Received: April 5, 2019; Revised: May 23, 2019; Accepted: June 10, 2019; Published online: June 30, 2019.
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This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Most periapical lesions can be classified as apical periodontitis, radicular cyst, or abscess. Treatment options for large periapical lesions management range from conventional endodontic treatment to surgical treatment and extraction. Recently, the surgical treatment is only administered if the conventional endodontic therapy fails to restore the integrity of the peripheral tissue. This case report submits the successful treatment of a large periapical lesion using non-surgical endodontic therapy. 
Keywords: Conservative treatment, Periapical diseases, Periapical periodontitis, Radicular cyst 

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