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題 名 | Morphometric Analysis of the Mandible in Subjects with Class Ⅲ Malocclusion=三級異常咬合者下顎幾何形態測量學分析 |
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作 者 | 潘金芸; 周思婷; 張宏博; 劉保興; | 書刊名 | The Kaohsiung Journal of Medical Sciences |
卷 期 | 22:7 民95.07 |
頁 次 | 頁331-338 |
分類號 | 416.92 |
關鍵詞 | 成人; 小孩; 三級異常咬合; 下顎; 形態測量分析; Adults; Children; Class Ⅲ malocclusion; Mandible; Morphometric analysis; |
語 文 | 英文(English) |
中文摘要 | 本項研究的目的,在於使用幾何形態測量學,分析三級異常咬合者構成下顎外形的形變。對於 100 位的男、女成人與 70 位男、女孩三級異常咬合者,進行側面測顱 X 光片的分析,與配對的正常咬合對照組比較,樣本數男、女相同。12 項下顎標誌經數位板輸入電腦,藉由普氏疊合分析獲得下顎平均幾何圖形;然後,使用薄板仿樣分析測定三級異常咬合與正常咬合者下顎局部形態的差異所在。男、女成人與男、女孩兩組咬合者之間的下顎形態具有統計學上的顯著差異;薄板仿樣分析顯示三級異常咬合者下顎沿著髁突—頦前下點的軸向在髁突與上行枝部位以及下顎聯合前下部分有伸長的形變,伸長的情形成人更為明顯。三級異常咬合者的形變呈現下顎前後伸長的發育,導致下顎前突的側面外形。 |
英文摘要 | This study evaluated the deformations that contribute to Class III mandibular configuration, employing geometric morphometric analysis. Lateral cephalograms of male and female groups of 100 young adults and 70 children with Class III malocclusion were compared to those of counterparts with normal occlusion. The sample included an equal number of both genders. The cephalographs were traced, and 12 homologous landmarks were identified and digitized. Average mandibular geometries were generated by means of Procrustes analysis. Thin-plate spline analysis was then applied to mandibular configurations to determine local form differences in male and female groups of adults and children with normal occlusion and Class III mal-occlusion. The mandibular morphology was significantly different between these two groups of male and female adults, and children (p < 0.0001). This spline analysis revealed an anteroposterior elongation of the mandible along the condylion–gnathion axis, showing an extension in the regions of the mandibular condyle and ramus, and of the anteroinferior portion of the mandibular symphysis in Class III groups. More extension was evident in Class III adults. The deformations in subjects with Class III malocclusion may represent a developmental elongation of the mandible anteroposteriorly, which leads to the appearance of a prognathic mandibular profile. |
本系統中英文摘要資訊取自各篇刊載內容。