本文選題：原子力顯微鏡　切入點：固定矯治器　出處：《廣西醫(yī)科大學》2014年碩士論文

【摘要】：目的:探討自鎖托槽與普通直絲弓托槽在牙齒移動過程中對0.018″×0.025″方形不銹鋼弓絲表面結(jié)構(gòu)產(chǎn)生的影響。 方法:對戴用Damon-Q自鎖托槽和Z2直絲弓矯治器的錯畸形患者于牽拉尖牙遠移靠攏第二雙尖牙前后，使用原子力顯微鏡觀察和測量在口內(nèi)環(huán)境中的0.018″×0.025″方形不銹鋼片段弓托槽滑過段弓絲四個面滑過前后、未滑過的磨牙前段弓絲四個面表面形貌的結(jié)構(gòu)變化。測量參數(shù)選用三維參數(shù)（Sz、Sp、Sv、St、Sdc），并于spss13.0統(tǒng)計學軟件中對數(shù)據(jù)進行統(tǒng)計分析，作滑過前后、臨床組內(nèi)、臨床組間結(jié)構(gòu)及變化量的比較。 結(jié)果:(1)臨床中自鎖組尖牙遠移牽引力約120g/側(cè)，移動速度約為0.96mm/月；直絲組約為150g/側(cè)，移動速度約為0.72mm/月。(2)原子力顯微鏡掃描下同一廠家、品牌的弓絲結(jié)構(gòu)差異無顯著性。(3)托槽滑動過后Z2直絲組弓絲四個面均變粗糙；自鎖組上下寬面弓絲結(jié)構(gòu)差異有顯著性，均變光滑；外窄面結(jié)構(gòu)差異無顯著性，弓絲表面無明顯變化；內(nèi)窄面結(jié)構(gòu)差異有顯著性，變得略粗糙。(4)自鎖組尖牙滑過后尖牙滑過段弓絲與磨牙前段弓絲結(jié)構(gòu)變化量四個面均有顯著性差異，而Z2直絲組僅內(nèi)窄面有顯著性差異，尖牙滑過段內(nèi)窄面比磨牙前段變得更粗糙，余三個面變化量差異無顯著性，變粗糙程度基本相近。(5)口內(nèi)環(huán)境下，兩組無托槽滑過的磨牙前段弓絲在尖牙滑動時間段內(nèi)均變粗糙；變粗糙程度內(nèi)外窄面差異有顯著性，以Z2直絲組為嚴重，上下寬面無顯著性差異，兩組變粗糙程度相近。 結(jié)論:1、同一廠家、品牌的方形弓絲表面結(jié)構(gòu)基本相同。2、與Z2直絲弓組相比，自鎖組托槽滑過弓絲后，弓絲表面結(jié)構(gòu)損壞小,多變光滑。尖牙遠移摩擦力小，牽引力較小，牙移動較快。3、于口內(nèi)自然環(huán)境下，固定矯治器的方形不銹鋼弓絲，即使無托槽滑過，隨治療時間加長，表面會變粗糙，，應及時更換。
[Abstract]:Objective: to investigate the effect of self-locking bracket and common straight wire bracket on the surface structure of 0.018 "脳 0.025" square stainless steel arch wire during tooth movement.Methods: the malformed patients wearing Damon-Q self-locking bracket and Z2 straight wire appliance were treated with the second bicuspid teeth before and after pulling the canine teeth.Atomic force microscopy (AFM) was used to observe and measure the structural changes of the 0.018 "脳 0.025" square stainless steel segment arch bracket in the oral environment before and after sliding through the four facets of the segmental arch wire, and the surface morphology of the four surfaces of the unskid anterior segment arch wire was observed and measured.The measurement parameters were selected as three dimensional parameters, and the data were statistically analyzed by spss13.0 software. The structure and variation of the data were compared between the clinical groups before and after sliding and in the clinical group.Results (1) in the self-locking group, the distal distraction force of the canine teeth was about the 120g/ side, and the moving speed was about 0.96mm/ month, and the straight wire group was about the 150g/ side and the moving speed was about 0.72mm/ month. 2) the same manufacturer was scanned by atomic force microscope.There was no significant difference in the arch wire structure of the brand. (3) after sliding the brackets, the four facets of the Z2 straight wire group all became rough, the difference of the upper and lower wide plane arch wire structure of the self-locking group was significant, all of them became smooth, and the difference of the outer narrow plane structure was not significant.There was no obvious change in the surface of arch wire, and there was significant difference in the structure of the inner narrow surface, which became slightly rough. 4) in the self-locking group, there were significant differences in the changes of the structure of the anterior segment of the arch wire between the canine and the anterior segment of the molar after the canine slip.In Z2 straight wire group, there was significant difference only in the inner narrow surface. The narrow surface of the canine was rougher than that of the anterior molar, but there was no significant difference in the change of the other three surfaces. The degree of coarseness was similar to that in the intraoral environment.The coarseness degree of the anterior arch wire in the anterior segment of the molars without brackets slid during the period of the canine sliding had significant difference between the two groups, especially in the Z2 straight wire group, there was no significant difference in the upper and lower width, and the degree of coarseness was similar between the two groups.ConclusionThe surface structure of the square arch wire of the same manufacturer is basically the same as that of the Z2 straight wire group. Compared with the Z2 straight wire group, the surface structure of the arch wire in the self-locking group after sliding over the bow wire is less damaged and changeable and smooth than that in the Z2 straight wire group.The distal movement of the canine teeth is small, the traction force is small, the tooth moves faster. 3. In the natural environment of the mouth, the square stainless steel arch wire of fixing the appliance, even if no bracket slips, the surface will become rougher with the treatment time, and should be replaced in time.
【學位授予單位】：廣西醫(yī)科大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：R783.5

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