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- 山本 学
- Department of Oral and Maxillofacial Surgery, Shiga University of Medical Science
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- 太田 義之
- Ohta Orthodontic Clinic
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- 田中 章夫
- Department of Oral and Maxillofacial Surgery, Shiga University of Medical Science
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- 中田 利明
- Department of Oral and Maxillofacial Surgery, Shiga University of Medical Science
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- 猪田 博文
- Department of Oral and Maxillofacial Surgery, Kohoku General Hospital
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- 吉武 一貞
- Department of Oral and Maxillofacial Surgery, Shiga University of Medical Science
書誌事項
- タイトル別名
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- Three cases in which the lower first molar was successfully aligned in the dental arch
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抄録
Although impaction of the lower first molar is extremely rare, we have encountered three cases of lower first molar impaction. Case 1 involved a 9-year-old girl with the chief complaint of retarded eruption of 6·Ê. Orthopantomography revealed dental follicular cyst originating from 6·Ê. Case 2 involved an 11-year-old boy, who consulted our department hoping to undergo induced eruption of 6·Ê. Orthopantomography revealed that 6·Ê was submerged and inclined distally. Case 3 involved a 9-year-old boy with the chief complaint of retarded eruption of 6·Ê. Orthopantomography revealed that the roots of 6·Ê were crooked distally. In cases 1 and 3, fenestration was performed, and in case 2, traction was performed. In all cases, the impacted first molar was successfully aligned in the dental arch.<BR>There are various etiologic factors of tooth impaction, and they are largely divided into systemic factors and local factors. In case 1, a dental follicular cyst impeded the eruption of 6·Ê. In case 2, the displacement of the tooth germ, insufficient eruption force, and anomalous direction of eruption were thought to have prevented the normal eruption of 6·Ê. In case 3, decreased eruption force caused by the crooked roots was thought to have led to impaction of 6·Ê.<BR>If impaction of the lower first molar is discovered before eruption of the lower second molar, treatment can be easy. Therefore, pediodic examination including radiography during the eruption period of the lower first molar will be helpful, especially when the eruption of a lower first molar is delayed compared to the others. In such cases, careful examination should be recommended to the patient. We also think that induced eruption is certainly worth trying in cases presenting no marked malformation or ankylosis of the tooth.
収録刊行物
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- 小児口腔外科
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小児口腔外科 9 (2), 59-65, 1999
日本小児口腔外科学会
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詳細情報 詳細情報について
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- CRID
- 1390001204473300864
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- NII論文ID
- 130004120973
- 10018998558
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- NII書誌ID
- AN10367847
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- ISSN
- 18846661
- 09175261
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可