2026-11-092026-11-09https://scholars.csmu.edu.tw/handle/123456789/38629To high efficiency of orthodontic treatment is every orthodontist idea. The self ligating bracket (SLB) is developed at 1935, but recently it is popular on the market. As it is promote by the dealers or orthodontic specialists, the clinician does not fully realize or believe its efficiency. That means the SLB still lack of scientific evidence on its role. The purpose of present study is going to accomplish the following projects: first year, it is going to compare the SLB and conventional bracket’s friction force before and after corrosion management. The second year is to evaluate efficiency of canine movement on Typodont. The third year is to compare the canine movement under different SLB on the patient’s mouth. Material and Methods: First year, the SLB used in present study is 0.022x0.028 inches slot Damon MX (Ormco Co.),SmartClip (Unitek, 3M Co.), In Ovation R (GAC Co.) and Carrierre (Ortho Org. Co). Total number is 240 SLB. Half of the SLB were corroded by electrochemical corrosion. The surface were analysed by SEM/EDS. The frictional force test was by pulling the wire which in bracket by EZtest (universal testing machine). The main wire applied is 0.018 in (0.46 mm) and 0.019 x 0.025 in (0.48 x 0.64 mm) (3M Unitek), 2 titanium-based wire: 0.019 x 0.025-in heat-activated nickel-titanium (Ni-Ti, 3M Unitek) and.017 x 0.025-in (0.44 x 0.64 mm) beta-titanium alloy wire (TMA, Ormco). The condition is as follows: crosshead speed 10mm/min, moving distance is 5mm. The second year: By preparing 10 set of Typodont with normal occlusion wax pattern, the tooth with SLB were placed on typodont. The 0.022x0.028 inches slot Damon MX (Ormco Co.),SmartClip (Unitek, 3M Co.), In Ovation R (GAC Co.) and Carrierre (Ortho Org. Co) bracket were tested one by one. The study divided as experiment group which is corroded SLB by electrochemical corrosion. The control group is not doning any treatment. The procedure is by leveling the teeth till the wire sequence are 0.018x0.025 SSW, then we start to doing the canine movement. Using the digital caliper to record the distance change, and before and after typodont were immersed in hot water bath. By parallel X ray taking, the distance change also recorded. The third year. Total sample of patient are 50 patients with limited health conditions. They are divided as four experiment group and one control group. Each group conatining10 patients. The 0.022x0.028 inches slot Damon MX (Ormco Co.),SmartClip (Unitek, 3M Co.), In Ovation R (GAC Co.) and Carrierre (Ortho Org. Co) bracket are applied to each group patient. Following the routine level action, the alignment is well done. Then start to doing the canine retraction. On first quadrant and fourth quadrant, the canine retraction force is 100g, the second and third quadrant canine retraction force is 150g. Using the digital caliper to record the distance change on patient, at before and after each visit(four weeks/visit). By parallel X ray taking, the distance change also will be recorded. By applying the statistic method, the mean and standard deviation will be calculated. It is hope from present study, the results can provide valuable data to the orthodontist who wants to apply SLB.隨著技術與材料的進步，高效率矯正治療要求成為大眾的需求，自瑣式矯正支 架(self ligating bracket，簡寫SLB)之設計乃期望達到此要求。然而由於廠商的鼓 吹與專家的建議，往往欠缺較多的科學數據與資料，許多臨床矯正醫師對於SLB 治療效率是否比傳統矯正支架優良則感到茫然。本研究計畫預計以三年時間完成 下面的研究目的：第一年於體外，比較自瑣式矯正支架(SLB)經氟化物腐蝕前後 之摩差力變化。第二年於體外，比較自瑣式矯正支架(SLB)於矯正模擬咬合器上， 犬齒之移動速率。第三年於體內，比較患者口中裝上自瑣式矯正支架後，犬齒之 移動速率。材料與方法：第一年本實驗所用自鎖式金屬的矯正支架為0.022x0.028 溝槽之Damon MX (Ormco Co.)，SmartClip (Unitek, 3M Co.)， In Ovation R (GAC Co.)，和Carrierre (Ortho Org. Co)。每種廠牌各60 個，共計240 個，實驗組為一 半矯正支架先以電化學將之腐蝕，以SEM/EDS 分析表面結構。控制組則只以 SEM/EDS 分析表面結構。摩差力試驗則將實驗組與控制組之矯正支架固定於鋁 板上，以矯正金屬線為0.018 in (0.46 mm) 和0.019 x 0.025 in (0.48 x 0.64 mm) (3M Unitek).； 二個titanium-based 矯正線: 0.019 x 0.025-in heat-activated nickel-titanium (Ni-Ti, 3M Unitek) 和0.017 x 0.025-in (0.44 x 0.64 mm) beta-titanium alloy wire (TMA, Ormco)，作為測試摩差力之主線。以EZ test 拉力 試驗機器(Shimadazu, Tokyo, Japan)做拉伸試驗，crosshead speed 為每分鐘 10mm，距離為拉動5mm 作為觀測，分別記錄其動摩差力與靜摩差力，再做統 計分析。 第二年則準備自鎖式金屬的矯正支架為0.022x0.028 溝槽之Damon MX (Ormco Co.)，SmartClip (Unitek, 3M Co.)， In Ovation R (GAC Co.)，和Carrierre (Ortho Org. Co)。每種廠牌各200 個，共計800 個。分為試驗組（經電化學腐蝕）與控制組。 準備十組矯正模擬咬合器(typodont)，先取同一種矯正支架裝置於咬合器上，依 照矯正治療程序，先做Leveling 動作，至換上0.018x0.025 SSW 不銹鋼線後，以 數位量尺進行犬齒移動之測量。以分角線X 光照射法，測量其距離之變化。 第三年，試驗樣本預計採50 位患者，患者均被告知試驗，均同意被拔除第一小 臼齒，試驗組分成四組每組十位，每一組分別裝上相同之自鎖式矯正支架。自鎖 式金屬的矯正支架為0.022x0.028’溝槽之Damon MX (Ormco Co.)，SmartClip (Unitek, 3M Co.)， In Ovation R (GAC Co.)，和Carrierre (Ortho Org. Co)。控制組 十位受試者，採用傳統之矯正支架MBT bracket (Unitek, 3M Co.)。依矯正治療 程序，於犬齒移動步驟時，以Closed coil spring 分別由第一大臼齒牽引到全齒， 第一、第四象限施與100g 力，第二、第三象限施與150g 力。以數位量尺(digital vernier caliper[shinwa Co. Japan])分別記錄由犬齒矯正支架遠心處到第一大臼齒 矯正支架近心端之距離。另外也以分角線X 光照射法，拍攝四個象限，第一大 臼齒到犬齒位置，並測量其距離之變化。以無母數和Mann-Whitney U test 分別 統計。比較不同狀況下之犬齒移動變化。期望藉由本研究可提供更多更正確的科 學化數據，並給矯正醫師決定使用SLB 時的一個參考。瑣式矯正支架摩差力矯正模擬咬合器犬齒移動體外試驗體內試驗elf ligating bracketfrictiontypodontcanine movementin vitroinvivoProject