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  5. Konus 雙重冠活動義齒結合有限元素分析之生物力學研究
 
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Konus 雙重冠活動義齒結合有限元素分析之生物力學研究

Other Title
Biomechanical Research of Konus Telescope Removable Denture
Stress Distribution by Finite Element Analysis
Type
thesis
Date Issued
2014-07-23
Author(s)
吳俊雄
Advisor
黃瓊芳
Subjects
系所名稱:醫療器材產業碩士專班
Description
學位別:碩士
語文別:中文
指導教授:黃瓊芳
共同指導教授:
口試委員:林永和;歐士輔
中文關鍵字:Konus 雙重冠;有限元素分析
Abstract
雙重冠(konus)義齒是指以內冠及外冠所構成的雙重金屬冠為固位體的義齒,
為利用內外冠的緊密適合所產生的摩擦力或楔子效果來維持。Konus 義齒的維持,
理論上是由konus 角的大小來決定,適當的內外冠維持力一顆支柱牙約為500-900
g,平均為700 g,因此合計在2-3 kg 最好,這個維持力在義齒使用時不會因黏著
性的食物而發生脫離,而且不會對病人的支柱牙發生太大的受力及外傷性變化。
konus 的角度,通常以6 度最為理想適當,但是在臨床的實際上,考量支柱牙的
骨植條件狀態或動搖度,konus 角在4-8 度間變化,在骨植狀態不良的支柱牙把
角度稍微加大來調整義齒整體的維持力。
本研究利用有限元素分析法分析konus 雙重冠活動義齒受咬合力時牙周組
織所產生之應力,將CT 影像重建之下顎骨模型及小臼齒模型,並利用CAD 軟
體將konus 內冠、外冠、植體、支台體等一併組合成有限元素分析模型,模擬
konus 雙重冠義齒受咬合力時,對於骨組織所產生之應力。經由有限元素分析的
輔助,可歸結konus 內冠角度與長度對於單顆義齒承受咬合力時並無顯著影響,
僅外冠長度對於骨組織及植體會造成較顯著的差異,而konus 雙重冠義齒能成功
地運用於臨床,仰賴醫師與技師之間的協調與配合,多起臨床病例亦證明konus
雙重冠確實可增加植體贋復的成功率。
URI
https://203.71.86.71/handle/123456789/56923

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