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相關文獻
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頁籤選單縮合
題名 | 小臼齒區的贅生齒=Supernumerary Teeth in the Premolar Region |
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作者 | 吳修慧; 賈孝範; | 書刊名 | 牙醫學雜誌 |
卷期 | 17:3 1997.09[民86.09] |
頁次 | 頁178-185 |
分類號 | 416.93 |
關鍵詞 | 小臼齒贅生齒; 贅生齒; Supernumerary teeth; Hyperdontia; Supernumerary premolar; |
語文 | 中文(Chinese) |
中文摘要 | 贅生齒在黃種人的盛行率高,大於百分之三,白種人較低,約在百分之一至百分 之三之間。小臼齒贅生齒約佔了全部贅生齒的百分之八至十,它們在下顎出現的機會較上顎 多,形態以增補型居多。小臼齒贅生齒形成的時間通常在多數恆牙齒列萌出之後,位置多在 恆牙第一小臼齒至第一大臼齒牙根的舌側或□側,且多數並未萌出,除非贅生齒已萌出,確 切診斷的工具只有X光片,目前常用的環口放射照片,牙根尖放射照片,咬合面放射照片。 治療方式多為拔除。 |
英文摘要 | The presence of teeth in excess of the normal complement is referred to as supernumerary teerh or hyperdontia. The prevalence of supernumerary teeth ranges from l to 3% in Caucasian population, and a frequency higher than 3% in Mongoloid races. 90 to 98% of supernumerary teeth occur in the maxilla, with a particular predilection for the premaxilla. Only 8 to 10% of supernumerary teeth are in the premolar region. Supernumerary teeth the premolar region are more frequent in the mandible than in the premolar region are similar to normal teeth (supplemental type). They usually develop after most permanent teeth have erupted, thus thus is rarely sufficient space for them to undergo complete eruption and their effect upon the occlusion is limited. The majority of supernumerary premolars can be diagnosed only by means of radiography (panoramic, periapical & occlusal radiographs)since most of them are impacted. The generally recommeded course of treatment is extracion, although in selected cases periodic monitoring is advised if the tooth could be useful for orthodontic reasons or the surgery would be unjustifiably hazardous to adjacent structures. |
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