摘要
現今台灣青少年喝飲料的風氣盛行，有研究指出矯正中的患者如果愛喝酸性軟式飲料不僅會造成牙齒表面牙釉質的腐蝕、矯正器的腐蝕、黏著劑和樹脂變色、蛀牙率增高、肥胖，亦造成矯正器黏結的強度下降；但這些酸性軟式飲料對矯正線的影響卻鮮少被討論。因此，本論文目的將研究軟性飲料對三種常用矯正線造成的影響。實驗分成0.016 英吋之不鏽鋼矯正圓線、0.016 英吋鎳鈦矯正圓線和0.016 英吋鈦鉬合金矯正圓線三組進行討論，這三組再次分為四個浸泡小組，分別為可口可樂（Coca-ColaR）、雪碧（SpriteR）、紅茶（麥香紅茶R）、以及控制組人工唾液（欣露R人工唾液）。 每天以冷藏之軟性飲料浸泡兩次，一次三十分鐘，共浸泡二十八天。以金相顯微鏡和電子顯微鏡觀察這些軟性飲料對矯正線的影響，並且做拉力測試。實驗結果發現可口可樂汽水以及雪碧汽水對矯正線有很高的腐蝕性，鈦鉬合金矯正線腐蝕情況比起不鏽鋼矯正線和鎳鈦矯正線嚴重得多，鎳鈦矯正線的腐蝕情況比起不鏽鋼矯正線較輕微。腐蝕以後矯正線平均斷裂荷重沒有顯著差異的改變，並且拉力曲線的表現也沒有顯著性的差異。
並列摘要
Acidic soft drinks became more and more popular over teenagers nowadays. Orthodontic patients who love acidic soft drinks will increase the opportunity of enamel erosion、corrosion of orthodontic appliance、discoloration of resin and bonding agent、dental caries、obesity、decrease bonding strength of orthodontic brackets and so no. However, whether these acidic soft drinks would affect orthodontic wires were seldom discussed. The purpose of this study was to investigate the effect of acidic soft drinks on orthodontic wires. The orthodontic wires are divided into 3 groups: 0.016-inch stainless steel round wire, 0.016-inch NiTi round wire, and 0.016-inch TMA round wire. And each wire group subdivided by four subgroups: Coca-Cola, Sprite, black tea, and artificial saliva (control). The orthodontic wires were rinsed with cold soft drinks 30 minutes twice a day for 28 days. The orthodontic wires then were stretched with “universal testing machine” for tensile test. A scanning electron microscopes and metalloscope were used to determine the amount of corrosion of the wires. The results indicated that Coca-Cola and Sprite subgroups had significant corrosion effect over orthodontic wires than black tea. All 3 types wires showed surface corrosion, especially TMA wires. NiTi wires had less corrosion than stainless steel wires. The orthodontic wires showed no significant difference between groups in tensile test, and also the tensile curve.