A right lower central incisor with a sinus tract at the labial gingiva that required periodontal treatment, but not endodontic treatment: Prodigious amount of periodontal regeneration of the severe labial bone loss due to a cemental tear after treatment

Takayoshi Nagahara, DDS, PhD^{1), 2)}, Katsuhiro Takeda, DDS, PhD*²⁾, Sadayuki Inoue, MT, CT¹⁾, Keinoshin Wada, DDS, PhD³⁾, Hideki Shiba, DDS, PhD²⁾

¹⁾ Nippon Kokan Fukuyama Hospital, 1844, Tsunoshita, Daimon-cho, Fukuyama, Hiroshima 721-0927, Japan, Phone: +81-84-945-3106 Fax: +81-84-945-3564

²⁾ Department of Biological Endodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, Hiroshima 734-8553, Japan, Phone: +81-82-257-5656 Fax: +81-82-257-5659

³⁾ Wada Dental Clinic, 3481-1, Minomi-cho, Fukuyama, Hiroshima 720-0832, Japan, Phone: +81-84-956-0246 Fax: +81-84-983-1211

*Corresponding author

Takayoshi Nagahara: takayoshi_nagahara@nkfh.or.jp

Katsuhiro Takeda: takepon@hiroshima-u.ac.jp

Sadayuki Inoue: sadayuki_inoue@nkfh.or.jp

Keinoshin Wada: oms@wadadc.jp

Hideki Shiba: bashihi@hiroshima-u.ac.jp