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| 研究生： |
羅任邦 Lo, Jen-Bang |
|---|---|
| 論文名稱： |
以三維矯正測力系統評估鎳鈦矯正線受溫度變化的影響 Three-dimensional orthodontic force measurement system to evaluate the temperature effect on NiTi wire |
| 指導教授： |
劉佳觀
Liu, Jia-Kuang |
| 共同指導教授: |
張志涵
Chang, Chi-Han |
| 學位類別： |
碩士 Master |
| 系所名稱： |
醫學院 - 口腔醫學研究所 Institute of Oral Medicine |
| 論文出版年： | 2017 |
| 畢業學年度： | 105 |
| 語文別： | 英文 |
| 論文頁數： | 54 |
| 中文關鍵詞： | 鎳鈦合金 、形狀記憶 、超彈性 、矯正線 、力 、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 |
| 外文關鍵詞： | Nickel-Titanium, shape memory, superelasticity, orthodontic wires, force, moment, biomechanics, oral model, CBCT, reconstruction, 3D printing |
| 相關次數： | 點閱：153 下載：5 |
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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。
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.
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校內：2022-07-07公開校外：2022-07-07公開