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題 名 | 利用電腦斷層影像分析臺灣人下顎舌側凹陷=Morphologic Analysis of Mandibular Lingual Concavity by Computed Tomography Image in Taiwanese Population |
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作 者 | 歐雅綺; 陳俊榮; 林靖萍; 黃國精; 曾春祺; | 書刊名 | 臺灣牙周病醫學會雜誌 |
卷 期 | 17:2 2012.06[民101.06] |
頁 次 | 頁191-197 |
分類號 | 416.96 |
關鍵詞 | 舌側凹陷; 電腦斷層影像; 人工植牙; Periodontal treatment; Guided tissue regeneration; Intrabony defect; Root resection; Crown lengthening; |
語 文 | 中文(Chinese) |
中文摘要 | 舌側凹陷是造成下顎植牙手術併發症的危險因子之一,如果手術區有明顯舌側凹陷,不僅會提高手術的困難度,更可能會造成嚴重的術後併發症。本篇研究利用電腦斷層影像,分析台灣人位於下顎第一大臼齒缺牙區舌側凹陷的比例,並針對有舌側凹陷的案例分析其凹陷的角度及深度。本研究總共收錄60位患者的電腦斷層的資料,其中30位為男性,30位為女性,平均年齡43.92±12.33歲,擷取第一大臼齒缺牙區的橫斷面影像(cross-sectional image),以下齒槽神經為參考線測量齒槽骨高度及寬度,並分析其齒槽骨型態。研究結果顯示距離下齒槽神經上緣2mm處的齒槽骨寬度為11.90±1.46mm,並和齒槽骨頂點的距離為15.64±2.85mm,齒槽骨頂點下方2mm處的齒槽骨寬度平均為6.51±1.97mm:齒槽骨型態最常見為凹陷型(undercut type),約佔50%:平均凹陷的角度及深度分別為67.85±8.11度及2.18±1.33mm。根據本研究結果,在台灣人下顎第一大臼齒缺牙區域,會有一半的機率會有舌側凹陷,其中有43%的患者舌側凹陷大於2mm,對於施行在此區域的手術,這些數據可以提供手術醫師作為參考,以增加手術的安全性。 |
英文摘要 | Background: Although dental implants are widely and sucessfully used for tooth replacement, many complications may occur during surgery. Lingual plate perforation is one of these complications when implants were placed in the mandible and is difficult to manage. The presence of lingual concavity increases the risk of perforating the lingual plate. The aim of this study was to evaluate the prevalence and the morphology of lingual concavity in the mandibular first molar region in Taiwanese population by using computed tomography images. Materials and Methods: Total 60 patients (30 males and 30 females) with mean age of 43.92。"12.33 year-old were included in this study. Their crosss-sectional computed tomography images were analyzed. Using the imaginary line 2mm above inferior alveolar canal as a reference, the lingual morphology of mandibular first molar were determined and measured. The images were classified into the convex, parallel and undercut type. In terms of the undercut type, further measurements were performed, such as the depth and angle of lingual concavity. The relevance between gender and the prevalence of concavity were also calculated and statistically analyzed with chi-square test. Results: The most common morphology of alveolar bone in the mandibular first molar region is undercut type. The prevalence of lingual concavity is 50% in Taiwanese population. There was no significant difference of the prevalence of lingual concavity between male and female. Conclusions: Lingual concavity was very common in the mandibular first molar region. Since lingual cavity may increase the risk of lingua l plate perforation during surgery, diagnosis and treatment planning should be made carefully before implantation in these cases. |
本系統中英文摘要資訊取自各篇刊載內容。