| 恒牙阻生X线研究 |
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| 引用本文： | 张志良,徐冶敏.恒牙阻生X线研究[J].临床放射学杂志,2001,20(1):43-45. |
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| 作者姓名： | 张志良 徐冶敏 |
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| 作者单位： | 1. 上海第二医科大学口腔医学院影像诊断学教研室
2. 上海第二医科大学九院临床医学院影像诊断学教研室 |
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| 摘 要： | 目的 调查研究恒牙阻生发生情况及其发生的局部因素。材料与方法 509例（533个）恒牙阻生牙为本组研究对象，并进行X线影像分析。结果 恒牙阻生牙发生率为0．55％。8－14岁年龄组最多见，占65．0％。上下颌骨之比为1．3：1。上颌尖牙阻生发生率最高（146／533）为27．4％。发生阻生的局部因素主要是牙间隙不足。结论 除上颌第1磨牙外，全口恒牙均可发生阻生，保留牙间隙是十分重要的。
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| 关 键 词： | 恒牙 阻生齿 X线影像 治疗 诊断 |
| 修稿时间： | 1999年11月15 |
X ray Study of Permanent Impacted Teeth |
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| ZHANG Zhiliang,XU Yemin. Teaching and Research Section of Diagnostic Imaging,School of Stomatology,Shanghai Second Medical University,Shanghai ,P.R.China.X ray Study of Permanent Impacted Teeth[J].Journal of Clinical Radiology,2001,20(1):43-45. |
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| Authors: | ZHANG Zhiliang XU Yemin Teaching and Research Section of Diagnostic Imaging School of Stomatology Shanghai Second Medical University Shanghai PRChina |
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| Institution: | ZHANG Zhiliang,XU Yemin. Teaching and Research Section of Diagnostic Imaging,School of Stomatology,Shanghai Second Medical University,Shanghai 200011,P.R.China |
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| Abstract: | Objective To investigate the incidence of permanent impactedteeth and to study the local factors accounted for their occurrence.Materials and Methods Five hundred and thirty-three permanent impacted teeth occurred in 509 cases were included in this study, and their X-ray findings were analyzed.Results The incidence of permanent impacted teeth was 0.55%, occurring most often in 8～14 year-old patients (65%). The occurrence ratio of maxilla to mandible was 1.3 to 1. The maxillary impacted canines carried the highest incidence (27.4%,146/533). The main factor lead to impacted teeth was insufficient interdentium.Conclusion All the permanent teeth, except the first molars of maxilla, may occur impacted teeth. To maintain a proper interdentium is of great importance. |
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| Keywords: | Permanent tooth Impacted tooth X ray image |
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