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系統識別號 U0026-2908201709433700
論文名稱(中文) 以三維矯正測力系統評估鎳鈦矯正線受溫度變化的影響
論文名稱(英文) Three-dimensional orthodontic force measurement system to evaluate the temperature effect on NiTi wire
校院名稱 成功大學
系所名稱(中) 口腔醫學研究所
系所名稱(英) Institute of Oral Medicine
學年度 105
學期 2
出版年 106
研究生(中文) 羅任邦
研究生(英文) Jen-Bang Lo
學號 T46041033
學位類別 碩士
語文別 英文
論文頁數 54頁
口試委員 指導教授-劉佳觀
共同指導教授-張志涵
召集委員-李澤民
口試委員-陳永崇
中文關鍵字 鎳鈦合金  形狀記憶  超彈性  矯正線    力矩  生物力學  口內模型  重建  錐狀射束電腦斷層掃描  3D列印 
英文關鍵字 Nickel-Titanium  shape memory  superelasticity  orthodontic wires  force  moment  biomechanics  oral model  CBCT  reconstruction  3D printing 
學科別分類
中文摘要 牙齒矯正過程很重要的是我們對牙齒(包含牙冠及牙根)三度空間上面的控制。為了達到理想的位置我們在施加矯正力量過程應考慮到三度空間力量的方向,特別是當矯正線及矯正器施加在牙齒上所產生的力量及力矩應該被清楚的瞭解,否則可能會造成治療失敗、施加過大的力量、牙根吸收或組織壞死等問題。因材料學的進步,鎳鈦矯正線因為其形狀記憶、超彈性被廣泛使用於牙齒矯正上。鎳鈦矯正線的機械性質也受到溫度及壓力改變所造成的相轉變影響。本實驗透過牙科錐狀斷層cone-beam CT 影像資訊並利用軟體(Mimics 10.01, Geometric studio 12 and Solidworks )設計建置立體測力模型,使用3D printer(Up plus 2)輸出後,利用多軸測力儀器Nano17(ATI, USA),可獲得牙齒在三度空間中所受到的力及力矩。進一步於溫控箱中觀察在不同溫度下四種不同.016x.022吋的矯正線(Nitinol, Sentalloy, 27°C CuNiTi, 40°C CuNiTi)透過自鎖式矯正器對牙齒的施力狀況。結果顯示,除了Nitinol外,溫度和牙齒受到的力量呈現高度相關(相關係數Sentalloy=0.964, 27°C CuNiTi=0.918, 40°C CuNiTi=0.946),而且比較這四種鎳鈦矯正線在不同溫度所產生的力量在統計上達顯著差異;力矩的部分與溫度的關係相關性並沒有非常高,Nitinol所展現的力矩最大,40°C CuNiTi最小。結論是矯正線在臨床上會受到溫度的影響,透過三維矯正測力系統評估可更了解矯正線對牙齒施力的影響。
英文摘要 The movement of teeth during orthodontic treatment should be controlled in all three planes of space, including the crown and root position. Force and movement should be accurately known in order to move a tooth into the ideal position and avoid undesirable side effects such as additional visits, overloading, tissue necrosis or even root resorption. Nickel-titanium (NiTi) wires are widely used in orthodontics as they combine the shape memory and superelasticity resulting from phase transformation induced by stress or temperature. In this study, a 3D force measuring system was developed using cone-beam computerized tomography (CBCT) images and software (Mimics 10.01, Geometric studio 12 and Solidworks). The models were fabricated using a 3D printer (Up plus 2). A multi-axis force transducer, called Nano17 (ATI, USA), was used for the 3D orthodontic force and moment measurements. Four different types of NiTi wire (Nitinol, Sentalloy, 27°C CuNiTi, 40°C CuNiTi) with the same size (.016 x .022 inches) were used. Self-ligating brackets (H4, Orthoclassic, USA) were bonded on simulated teeth. The change in orthodontic force and moment can be observed inside temperature controlled box. The results revealed that there was a strong relation between temperature and orthodontic force for most brands of wires, except Nitinol (correlation coefficient: Sentalloy=0.964, 27°C CuNiTi=0.918, 40°C CuNiTi=0.946). Comparison of forces under different temperature among different NiTi wires also reached statistically significant difference. However, the moment and temperature did not show a very strong correlation. Nitinol expressed highest and 40°C CuNiTi expressed lowest moment among four groups. The 3D force measurement system can provide practical information for clinical use.
論文目次 Chapter 1 Introduction 1
1-1 Background 1
1-2 Literature review of force measurement systems 2
1-2-1 Friedrich et al., 1998 2
1-2-2 Fuck et al., 2006 3
1-2-3 Badawi et al. 2009 4
1-2-4 Mencatelli et al., 2017 5
1-3 NiTi wire 6
1-3-1 Shape memory 6
1-3-2 Superelasticity 7
1-4 Motivation 9
1-5 Objectives 10
Chapter 2 Materials and methods 11
2-1 Experimental flowchart 11
2-2 CT image acquisition 11
2-3 Reconstruction 12
2-4 Fixture design and 3D printing 14
2-5 Bonding brackets 15
2-6 Nano17 16
2-7 Experimental materials (NiTi wires) 19
2-8 Experimental procedure 20
2-9 Statistics 21
Chapter 3 Results 22
3-1 Force 22
3-1-1 At different temperatures 22
3-1-2 Inter-brand differences 30
3-2 Moment 31
3-2-1 At different temperatures 31
3-2-2 Inter-brand differences 39
Chapter 4 Discussion 41
4-1 3D force measurement system 41
4-2 Load of NiTi wire 42
4-2-1 Force 43
4-2-2 Moment 46
4-3 Limitations 50
Chapter 5 Conclusion 52
Chapter 6 References 53

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