アブストラクト（12巻1/2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Two Cases of Impacted Upper Deciduous Central Incisor Caused by Abnormal Erupting Direction and/or Position
Subtitle　： ORIGINAL ARTICLES
Authors　： Sumio Kumasaka, Yasuhiro Nagashima, Atsushi Miyagi, Mitsuru Shikone, Hisaaki Shinji, Noboru Uchimura, Morio Higaki
Authors（kana）　：
Organization　： Department of Pedodontics, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 12
Number　： 1/2
Page　： 63-73
Year/Month　： 1984 / 3
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Introduction] Impaction is defined as the condition of a tooth failing to erupt as it still remains under the gingiva at the ordinary period of eruption. It is believed that the tooth impaction is more incidental in deciduous dentition than in a permanent one. Among deciduous teeth, the primary molar is most often liable to be impacted, while the incisor has the highest incidence of impaction among the often less impacted teeth. It is supposed that tooth impaction results from systemic or local cause, although the causative factors are left unknown in some cases. The authors experienced two cases of deciduous incisor impaction, and observed them clinically and radiographically. Moreover, their histological findings were obtained after extraction. Thereby we would like to add several information to past case studies of deciduous tooth impaction. [Cases] [Case 1] A 4-year-and-9-month-old boy. Date of birth: May 11, 1978. First dental examination: March 1, 1983. Chief complaint: Retarded eruption of the upper right primary medical incisor. [Anamnesis] The medical history of the patient's mother showed nothing particular. She was healthy during her pregnancy of her boy with a normal labour.
Practice　： Dentistry
Keywords　： Impacted Deciduous Teeth, Abnormal Erupting Direction, Abnormal Position of Dental Germ