case_images: PMC6004977_01
case_images: Clinical symptoms of patient.
case_images: thc-26-thc174689-g001.jpg
case_images: PMC6004977_01_thc-26-thc174689-g001.jpg
case_images: thc-26-thc174689-g001
case_images: Fig. 1, the primary symptoms are central incisors obliquity-crowns incline to the lingual side and roots trend to labial side, but a weak bone plate on labial side complicates the conditions to achieve a routine treatment. For more messages about alveolar bone and roots, a group of CT images was obtained by a spiral CT machine (Toshiba/Aquilion ONE, Florida, US) with parameters as follow: 120 KV, 150 mA.s, pixel size 0.342 mm, 0.5 mm slice thickness, 0.5 mm slice interval and entirely 505 images were acquired.