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研究生:藍鼎勛
研究生(外文):Ting-Hsun Lan
論文名稱:下顎後牙區不同角度植體咬合功能時的應力分布之影響--有限元素法
論文名稱(外文):Stress Analysis of Angulated Dental Implant Installation— Finite Element Method
指導教授:李惠娥李惠娥引用關係
指導教授(外文):Huey-Er Lee
學位類別:碩士
校院名稱:高雄醫學大學
系所名稱:牙醫學研究所碩士班
學門:醫藥衛生學門
學類:牙醫學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:126
中文關鍵詞:植體傾斜壓應力值下顎三維有限元素分析
外文關鍵詞:stress analysisimplant angulationImplant tiltingfinite element method
相關次數:
  • 被引用被引用:0
  • 點閱點閱:137
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:1
根據傳統的觀念,植體要相互平行且垂直咬合面的植入。因為臨床上的限制,常常發現有非相互平行的植體出現。本篇實驗主要是研究在咀嚼力下不同角度植體植入的骨應力分布。進而推論出更理想的植入角度。
我們使用三維有限元素模型來模擬下顎骨在第一、第二大臼齒區缺牙並植入植體的情形。根據單顆植體角度15°的偏差來做角度變化總計模擬九組模型,施力200N在贗復物牙橋的中心咬合窩上,方向分為垂直力、水平力(頰舌向)及斜向力45°(頰舌向及近遠心向)。
植體植入的角度有所傾斜並不一定都是壞的結果,就力量的分布而言,有些設計還優於平行植入的植體 ;就垂直施力而言,植體根尖稍微分開的組別(Model 2、 5、6)其應力表現是接近或更優於平行植入的組別(Model 1);而在水平力的施予下,除了在第二大臼齒區遠心傾斜植入植體的組別(Model 4、9)表現出較高的壓應力值外,其餘各組的表現各組都差別不大。頰舌向45°斜向力的應力表現與水平力近似,而近遠心向45°斜向力的應力表現以植體根間分開的組別表現較佳(Model 2、5、6),其餘各組的表現都比平行植入的植體還差。
在臨床上常常有許多的理由來解釋植體角度的差異,特別是在後牙區。事實上,植體植入時在根尖的部分有稍微的外展也許是一個不錯的選擇,建議臨床醫師在手術板引導下先植入第二大臼齒區植體,確認角度的差異後再來植入第一大臼齒,並可由X ray知道預後情況。
According to the conventional concept, implants were installed to parallel with each other and perpendicular to occlusion plane. Due to clinical limitations, non-parallel implants occurred at times. The purpose of this study was focused on the bony stress distribution of different implant tilting under masticatory load. Furthermore, attempted to find the desirable installation angle of implant.
The three-dimensional finite element models were constructed to simulate when mandibular first and second molar missing restored with implants. According to different angulation designs (15�a), nine solid models were built up. A simulating load (200N) was applied vertically、 horizontally(buccal-lingual direction) and obliquely45°(B-L direction and mesial-distal direction) on the occlusal central fossa of the bridge prostheses.
Implant bodies tilting with the bridge prostheses not all got bad results. For stress distribution, some designs will be better than parallel installation. From the peak stress values , slightly divergent installed implants have near(model 2) or lower values (model 5&6); slightly convergent installed implants got higher values under vertical force. Under horizontal force, the peak values were close to each other, except the 2nd implant incline distally (model 4&9) .Under the oblique force of buccal-lingual direction, the results were similar to the horizontal force; the oblique force of mesial and distal direction, slightly divergent installed implants had lower values (model 2,5&6),the others had worse results than parallel installed implants (model 1).
Clinically, there are many reasons to explain why implant tilting occur, especially over posterior area. Slightly non-parallel installation of implant bodies is may be a better choice. We suggested the clinician to install the implant over the second molar area first and check X ray first to decide the next step, and check another X ray after installing the other implant over the first molar area to get prognosis.
目 錄
中文摘要
英文摘要
致謝
第一章 緒論---------------------------------------1
1-1 研究背景----------------------------------------1
1-2 文獻回顧----------------------------------------3
1-3 研究動機與目的----------------------------------7
第二章 材料與方法-------------------------------- 8
2-1 研究流程概述------------------------------------8
2-2 三維有限元素模型建立---------------------------10
2-3 最佳化網格的建立-------------------------------14
2-4 模型的邊界條件與負荷---------------------------15
第三章 結果--------------------------------------16
3-1 典型之區域型人工植牙分析模擬結果------------- 16
3-2 不同角度的植入型態對齒槽骨應力分析----------- 18
第四章 討論--------------------------------------28
4-1 有限元素分析與牙科植體-----------------------28
4-2 有限元素模型與相關條件設定-------------------29
4-3 結果討論---------------------------------------33
第五章 結論與未來展望 -------------------------------44
參考文獻------------------------------------------------46
表格----------------------------------------------------53
附圖----------------------------------------------------58














表 次
第一章 緒論
第二章 材料與方法
表2-1 頰舌徑的平均值-------------------------------------53
表2-2 骨模型近遠心徑------------------------------------53
表2-3 模型高度的決定------------------------------------53
表2-4 緻密骨厚度----------------------------------------54
表2-5 本研究所使用之材料參數----------------------------54
第三章 結果
第四章 討論
表4-1 垂直施力時與Model 1相較下的增減幅百分比----------54
表4-2 PH (B->L) 400N下的增減幅百分比---------------------------55
表4-3 PH (L->B) 400N下的增減幅百分比-----------------------55
表4-4 POb 45°(M->D) 400N下的增減幅百分比---------------------55
表4-5 POb 45°(D->M) 400N下的增減幅百分比---------------------56
表4-6 POb 45°(B->L) 400N下的增減幅百分比---------------------56
表4-7 POb 45°(L->B) 200N下的增減幅百分比---------------------56
表4-8 犬齒引導咬合下的總得分----------------------------57
表4-9 群體功能引導咬合下的總得分------------------------57

圖 次
第一章 緒論
圖1-1 臨床上植體角度的差異------------------------------58
圖1-2 工程界的設計------------------------------------- 58
圖1-3 大臼齒的牙根型態----------------------------------58
第二章 材料與方法
圖2-1 本研究流程圖--------------------------------------59
圖2-2 下顎骨自然牙還存在時的頰舌徑平均值----------------60
圖2-3 頰側緻密骨與舌側緻密骨厚度的平均值----------------60
圖2-4 XY平面上的點座標模擬草圖-------------------------61
圖2-5 XZ、YZ平面的點座標模擬草圖-----------------------61
圖2-6 加入緻密骨的模擬草圖------------------------------62
圖2-7 確立座標------------------------------------------62
圖2-8 線連結--------------------------------------------62
圖2-9 面的圍成------------------------------------------63
圖2-10 體積的構築----------------------------------------64
圖2-11 延展後的下顎骨模型--------------------------------64
圖2-12 工作平面------------------------------------------65
圖2-13 植體植入------------------------------------------65
圖2-14 贗復體牙橋---------------------------------------66
圖2-15 Model 1------------------------------------------66
圖2-16 各組Model---------------------------------------67
圖2-17 檢視模型參數的給予-------------------------------68
圖2-18 給予材料參數後的八組模型-------------------------69
圖2-19 網格化-------------------------------------------70
圖2-20 最佳化後的八組模型-------------------------------71
圖2-21 近遠心面施予邊界條件------------------------------72
圖2-22 七個施力方向--------------------------------------72
第三章 結果
圖3-1 Model 1在PV 垂直施力各部分的應力分布圖------------73
圖3-2 Model 1在PH 水平施力各部分的應力分布圖------------75
圖3-3 PV 施在中心咬合部位------------------------------ 78
圖3-4 PV 八組緻密骨應力分布圖-------------------------- 78
圖3-5 PH (B->L) 在中心咬合位置-----------------------------83
圖3-6 PH (B->L) 八組緻密骨應力分布圖-----------------------83
圖3-7 PH (L->B) 在中心咬合位置-----------------------------88
圖3-8 PH (L->B) 八組緻密骨應力分布圖-----------------------88
圖3-9 POb 45°(M->D) 在中心咬合位置---------------------------93
圖3-10 POb 45°(M->D) 八組緻密骨應力分布圖---------------------93
圖3-11 POb 45°(D->M) 在中心咬合位置--------------------------98
圖3-12 POb 45°(D->M) 八組緻密骨應力分布圖--------------------98
圖3-13 POb 45°(B->L) 在中心咬合位置-------------------------103
圖3-14 POb 45°(B->L) 八組緻密骨應力分布圖-------------------103
圖3-15 P ob 45°(L->B) 在中心咬合位置-------------------------108
圖3-16 P ob 45°(L->B) 八組緻密骨應力分布圖-------------------108
第四章 討論
圖4-1 Pv 400N下,緻密骨最大壓縮應力值的柱狀圖-----------113
圖4-2 PH (B->L),緻密骨最大壓縮應力值的柱狀圖--------------113
圖4-3 PH (L->B),緻密骨最大壓縮應力值的柱狀圖---------------113
圖4-4 P ob 45° (M->D),緻密骨最大壓縮應力值的柱狀圖-----------114
圖4-5 P ob 45° (D->M),緻密骨最大壓縮應力值的柱狀圖------------114
圖4-6 P ob 45° (B->L),緻密骨最大壓縮應力值的柱狀圖------------115
圖4-7 P ob 45° (L->B),緻密骨最大壓縮應力值的 柱狀圖-----------115
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