三種鎳鈦器械對(duì)根管初始工作寬度的適應(yīng)性研究
發(fā)布時(shí)間:2018-02-12 10:57
本文關(guān)鍵詞: 根管初始工作寬度 根管初步預(yù)備 機(jī)用鎳鈦器械 器械折斷 出處:《吉林大學(xué)》2015年碩士論文 論文類型:學(xué)位論文
【摘要】:目的: 因前牙和前磨牙的根管初始工作寬度較大,許多專家和廠家在指導(dǎo)鎳鈦器械使用和推介時(shí)指出就此類牙齒的根管不必進(jìn)行完善的根管初步預(yù)備。針對(duì)這一問題,我們使用目前在臨床上最常用的Protaper、Mtwo、Reciproc鎳鈦系統(tǒng)的第一支銼進(jìn)入原始根管,通過X線片觀察其進(jìn)入的最大深度,來評(píng)價(jià)鎳鈦器械與根管初始工作寬度的適應(yīng)性,為在臨床根管預(yù)備過程中選擇合理的器械提供依據(jù)。同時(shí),對(duì)比在Pathfile鎳鈦器械進(jìn)行根管初步預(yù)備后上述三種鎳鈦器械的第一支銼進(jìn)入根管的深度差異,來探討鎳鈦器械在根管預(yù)備前進(jìn)行初步預(yù)備的必要性。 材料方法: 1.收集吉林地區(qū)成年人上下頜中切牙、側(cè)切牙、尖牙、第一前磨牙、第二前磨牙、第一磨牙、第二磨牙各10顆,經(jīng)預(yù)處理及截冠后將Protaper鎳鈦系統(tǒng)的S1號(hào)銼、Mtwo鎳鈦系統(tǒng)的10號(hào)銼、Reciproc鎳鈦系統(tǒng)的25號(hào)銼分別編號(hào)為P、M、R,在保持根管的原始形態(tài)下手動(dòng)分別插入到所選離體牙中,感到阻力后停止插入,按照長(zhǎng)焦距平行投照技術(shù)拍攝X線片,導(dǎo)入DFW數(shù)字成像軟件系統(tǒng),,測(cè)量各鎳鈦銼尖端距解剖根尖孔的長(zhǎng)度L1。 2.將上述所有離體牙用Pathfile鎳鈦器械進(jìn)行根管初步預(yù)備后,再分別將P、M、R手動(dòng)插入到所選離體牙中,感到阻力后停止插入,按照長(zhǎng)焦距平行投照技術(shù)拍攝X線片,導(dǎo)入DFW數(shù)字成像軟件系統(tǒng),測(cè)量各鎳鈦銼尖端距解剖學(xué)根尖孔的長(zhǎng)度L2。與上述器械進(jìn)入原始根管測(cè)得的長(zhǎng)度L1進(jìn)行比較,將兩組實(shí)驗(yàn)結(jié)果進(jìn)行統(tǒng)計(jì)學(xué)分析。 結(jié)果: 1.在上頜側(cè)切牙,上頜第一磨牙MB、DB,上頜第二磨牙MB、DB,下頜中切牙,下頜側(cè)切牙,下頜第一磨牙MB、ML,下頜第二磨牙MB、ML的根管中初步預(yù)備情況和三種鎳鈦器械類型之間存在協(xié)同作用(P0.001),即根管進(jìn)行初步預(yù)備后對(duì)各類鎳鈦器械的使用效果有促進(jìn)作用。在進(jìn)行初步預(yù)備與未初步預(yù)備之間,各鎳鈦器械進(jìn)入根管深度差異有統(tǒng)計(jì)學(xué)意義(P0.001),其中,P銼和M銼有統(tǒng)計(jì)學(xué)意義,R銼無統(tǒng)計(jì)學(xué)意義。 2.實(shí)驗(yàn)用所有組離體牙無論是否進(jìn)行根管初步預(yù)備,鎳鈦器械類型均對(duì)測(cè)量值的差異有統(tǒng)計(jì)學(xué)意義(P0.001)。各鎳鈦器械類型的使用效果運(yùn)用LSD法進(jìn)行兩兩比較,由均值可得:M銼進(jìn)入原始根管深度最大、P銼次之,R銼最小。其中在上頜中切牙、上頜尖牙、上頜第一磨牙P、上頜第二磨牙P、下頜尖牙、下頜第一前磨牙、下頜第二前磨牙、下頜第一磨牙D、下頜第二磨牙D的根管中測(cè)得的M銼尖端距解剖根尖孔長(zhǎng)度均值小于0.5mm,即超出生理性根尖孔,說明M銼與上述各組根管初始工作寬度適應(yīng)性差,在這里上頜尖牙組還包括P銼。 3.在上頜側(cè)切牙、上頜尖牙、上頜第一磨牙、上頜第二磨牙、下頜中切牙、下頜側(cè)切牙、下頜第一磨牙、下頜第二磨牙的根管中,無論初步預(yù)備情況和三種鎳鈦器械類型之間是否存在協(xié)同作用,根管進(jìn)行初步預(yù)備與未進(jìn)行初步預(yù)備情況對(duì)測(cè)量值的差異有統(tǒng)計(jì)學(xué)意義(P0.001),其中上頜尖牙組采用單因素統(tǒng)計(jì)分析。 結(jié)論: 1.所有組離體牙無論是否進(jìn)行根管初步預(yù)備,三種鎳鈦系統(tǒng)中作為進(jìn)入根管的第一支器械,Mtwo的10號(hào)銼進(jìn)入根管深度最大,其次為Protaper的S1號(hào)銼,而Reciproc的25號(hào)銼效果不佳。其中在上頜中切牙、上頜尖牙、上頜第一磨牙P、上頜第二磨牙P、下頜尖牙、下頜第一前磨牙、下頜第二前磨牙、下頜第一磨牙D、下頜第二磨牙D的根管中發(fā)現(xiàn)Mtwo鎳鈦器械的10號(hào)銼與上述各組根管初始工作寬度適應(yīng)性差,在這里上頜尖牙組還包括Protaper的S1號(hào)銼。 2.在上頜側(cè)切牙、上頜尖牙、上頜第一磨牙、上頜第二磨牙、下頜中切牙、下頜側(cè)切牙、下頜第一磨牙、下頜第二磨牙的根管中,使用Pathfile鎳鈦器械進(jìn)行根管初步預(yù)備與未進(jìn)行根管初步預(yù)備之間存在差異,初步預(yù)備后的效果較好。進(jìn)行根管初步預(yù)備后,Protaper的S1號(hào)銼和Mtwo的10號(hào)銼再次進(jìn)入根管的深度較Rrciproc的25號(hào)銼明顯。 3.在本實(shí)驗(yàn)中,Reciproc單支銼系統(tǒng)其25號(hào)銼與上述14組牙位根管的初始寬度適應(yīng)性較其他兩種常規(guī)鎳鈦器械稍差。
[Abstract]:Objective:
Because of anterior teeth and premolar root canal initial working width is large, many experts and manufacturers in the guide and promote the use of nickel titanium instruments that such teeth root canal without complete root canal preliminary preparation. To solve this problem, we use the most commonly used in clinical Protaper, Mtwo, the first branch file Reciproc nickel titanium system into the original root canal, the maximum depth of entering through the observation of X-ray evaluation of nickel titanium instruments and root canal initial working width of adaptability, provide a basis for rational selection of clinical root canal preparation process equipment. At the same time, the first file comparison of root canal preparation after the preliminary three kinds of nickel titanium instruments in Pathfile nickel titanium instruments in different depth of the root canal, to explore the necessity of preliminary preparation of nickel titanium instruments in root canal preparation before.
Material methods:
Collect 1. adults in Jilin area on the mandibular incisors, lateral incisor, canine and first premolar and second premolar, first molar and second molar teeth 10, after pretreatment and crowns after Protaper nickel titanium system S1 file, Mtwo nickel titanium system No. 10 file, Reciproc nickel titanium system No. 25 file were numbered P, M, R, while maintaining the original form of the root canal manual were inserted into the selected teeth, was stopped after the insertion resistance, with long focal length parallel projection X-ray digital imaging system into DFW software, measuring the nickel titanium file from the anatomic root tip the length of the hole L1.
2. all the teeth with Pathfile nickel titanium instruments in root canal preparation and preliminary, respectively P, M, R manually inserted to the selected teeth, was stopped after the insertion resistance, with long focal length parallel projection X-ray digital imaging system into DFW software, and the length of L2. the instrument measuring the nickel titanium file from the apical tip of anatomy into the original root canal length measured by L1 were compared with two groups of experimental results were statistically analyzed.
Result錛
本文編號(hào):1505471
本文鏈接:http://sikaile.net/yixuelunwen/kouq/1505471.html
最近更新
教材專著