隱形牙套在不同溶液中力量衰退的研究

研究目的本研究目的為了解隱形牙套在矯正治療過程中的力量衰退情形，並針對牙套受力、口腔環境、牙套設計往唇側移動距離、浸泡溶液探討造成牙套矯正力衰退之原因材料方法本研究分為兩部分實驗。首先是牙套受力、牙套設計往唇側移動距離與口腔環境的探討，設計上顎右門牙唇側移動0.1mm (D1), 0.2mm (D2), 0.3mm (D3)的Duran T牙套，放置於牙套是否浸泡口水(S)、牙套是否配戴受力(F)，共4種環境組合下。最後使用薄膜壓力感測器測量七天內牙套矯正力變化。第二部分是探討浸泡不同飲料對牙套的影響。三種不同成型片(Duran T, Biolon, Zendura FLX)於人工唾液與五種溶液(人工唾液、咖啡、茶、可樂、紅酒) 中浸泡0, 1, 4, 7天，再進行三點彎曲測試測量成型片強度，統計使用independent t test 比較比較同一種成型片浸泡飲料與浸泡唾液同樣時間的殘餘強度比例。結果在模擬口腔環境( SF )下，D2、D3組都在Day 0與Day 1之間有顯著差異( p < 0.05 )。SFD1到Day5有顯著差異（p < 0.05）。SFD2與SFD3皆到Day4有顯著差異（p< 0.05）。此外，在七天內SFD3組的矯正力衰退比例比SFD1、SFD2高，但是統計上並無顯著差異。在力量衰退變因分析上，浸泡口水( S )在Day1-Day7對牙套矯正力殘餘比例皆有顯著影響( p < 0.05 )，而設計牙套往唇側移動距離(D)在Day3開始對牙套矯正力殘餘比例皆有顯著影響( p < 0.05 )。Biolon 成型片浸泡於酒、咖啡與浸泡於人工唾液第1、4天有顯著差異( p < 0.05 )。Duran T成型片浸泡於咖啡與浸泡在人工唾液第1天存在顯著差異( p < 0.05 )。Zendura FLX成型片浸泡任何飲料與浸泡唾液之間都無顯著差異。結論在受力與人工唾液環境下，牙套設計頰側水平移動越大，矯正力衰退比例越高。牙套浸潤在人工唾液會加速矯正力衰退，Zendura FLX 的防水層觀察七天內最有效對抗各種飲料水分子的滲透破壞內部結構。

PurposeThe present study aimed to compare the force decay of invisible aligners and explore the factors contributing to the reduction of the force, including the forces applied to the aligner, the oral environment, the distance designed for tooth movement, and the effects of soaking solutions.Materials and MethodsThe whole experiment consists of two parts. The initial segment of this study focuses on the force applied to the aligner, the oral environment, and the prescribed distance for tooth movement. The prepared invisible aligners (Duran T) were immersed in saliva (S) and subjected to applied force (F) for 7 Days. The aligners were set and placed on the maxillary right central incisor with 0.1 mm (D1), 0.2 mm (D2), and 0.3 mm (D3) labial movement. Thin-film pressure sensors were used to measure the aligner force changes. The data were collected and analyzed by statistical methods. In the second part, three types of invisible impression films, i.e., Duran T (polyethylene terephthalate glycol, PETG), Biolon (polyethylene terephthalate, PET), and Zendura FLX (polyurethane, PU), were soaked in artificial saliva and four drinks (coffee, tea, cola, red wine) for 1, 4, and 7 days. The strength test was performed by using the three-point bending test method. The residual strength ratio for the same type of invisible correction film at the same time was separately recorded. The independent t test was used to indicate significant differences at p<0.05ResultsSignificant differences were observed in the initial and first-Day force between the D2 and D3 groups under simulated oral environment force (SF) (p<0.05). There was a significant difference in force decay between Day 1 and Day 7 for all groups (p<0.05). The SFD1 group showed a significant decrease in force on Day 5 (p<0.05), while the SFD2 and SFD3 groups showed significant force decay on Day 4 (p<0.05). The force decay ratio on Day 7 was higher in the SFD3 group than in the SFD1 and SFD2 groups, but no significant difference was observed. The Biolon invisible correction film soaked in cola, red wine and artificial saliva showed significant differences on the 1st and 4th days (p<0.05). The Duran T invisible correction film soaked in coffee and artificial saliva showed significant differences on the first day (p<0.05). The Zendura FLX invisible correction film had a waterproof layer on the surface, and there was no significant difference between soaking in any drink and soaking in saliva (p>0.05).Conclusion Larger labial movement of the aligners resulted in higher force decay under artificial saliva environments, and the force decay of invisible aligners was increased by immersion time in artificial saliva. Regarding the impact of patient diet on invisible aligner, the waterproof layer of Zendura FLX is most effective in resisting damage from various beverages.