上顎両側犬歯の萌出異常に伴う側切歯の歯根吸収症例について

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  • Root Resorption of the Maxillary Lateral Incisor Caused by the Ectopic Eruption of the Maxillary Canine

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A 9 year 11 month olf female with ectopic eruption of the bilateral maxillary canines had her left lateral incisor extracted because of severe root resorption. We report on the clinical signs and treatment processes of this case. We presumed the cause of the root resorption and investigated the point of examination on the root resorption of the incisor.<BR>Conclusions were as follows:<BR>1. The presumed causes of the root resorption of the maxillary left lateral incisor were ectopic eruption and rapid inclination of the left canine, existence of the follicular cyst and short root tendency in the maxillary incisors.<BR>2. Ectopic eruption of the bilateral maxillary canines was not due to the tooth to denture base discrepancy.<BR>3. In cases in which it is found that canines are not palpated nor located when in the normal position or the lateral incisor inclines when a patient leaches around 10 years of age, it is necessary to examine by radiograph such items as an orthopantomogram to prevent lateral incisors from root resorption.<BR>4. A careful observation is needed when the crown of the canine locates medially and its axis inclines medially on orthopantomogram. If possible, taking a tomogram is recommended to comfirm a position between the canine and incisor, and the position and extent of the root resorption of the later.

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