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系統識別號 U0007-2007201018515800
論文名稱(中文) Surface Analysis of Different Tooth Prepared Using Er,Cr:YSGG Laser, Er:YAG Laser and High Speed Diamond Burs
論文名稱(英文) Surface Analysis of Different Tooth Prepared Using Er,Cr:YSGG Laser, Er:YAG Laser and High Speed Diamond Burs
校院名稱 臺北醫學大學
系所名稱(中) 牙醫學系碩博士班
系所名稱(英) School of Dentistry
學年度 98
學期 2
出版年 99
研究生(中文) 睦韻蘭
研究生(英文) Riana Laitu Poma (Laitu Puapua Poma)
學號 M204096016
學位類別 碩士
語文別 英文
口試日期 2010-06-24
論文頁數 81頁
口試委員 指導教授-林哲堂
委員-黃豪銘
委員-鄭璧瑩
中文關鍵字 Er,Cr:YSGG雷射  Er:YAG雷射  脫落  牙冠  濕潤性  接觸角 
英文關鍵字 Er,Cr:YSGG laser  Er:YAG laser  Ablation  Crown 
學科別分類
中文摘要 目的: 以新的鉺牙科雷射製備後的牙齒,其表面粗糙度及濕潤性等特性目前還尚未清楚。因此本篇研究的目的是研究以Er,Cr:YSGG雷射(Erbium,Chromium:Yttrium,Scandium,Gallium,Garnet)以及Er:YAG雷射(Erbium:Yttrium,Aluminium,Garnet)與一般高速鑽石鑚針磨製牙齒,牙齒製備是為了製作牙冠,並且細分為酸蝕以及不酸蝕之組別分別進行測試,測試其表面粗糙度以及對於濕潤性的影響。
背景: 鉺牙科雷射在其對於生物組織具有熱度機械效應的過程中,由於幾乎完全的移除了牙齒塗層(smear layer),在切除牙齒的硬組織的同時也導致了表面的粗糙度。適度的表面粗糙度可以增進表面的濕潤性因而增進了牙冠的固位。
方法: 第一部份: 24顆未蛀牙的臼齒分為三個組別,Er,Cr:YSGG 雷射組,Er:YAG雷射組與高速鑽石鑚針組,每組各有8顆臼齒,製備過程中有4顆會磨至牙本質,而另4顆會磨至牙釉質。在牙釉質與牙本質的4顆牙齒的樣本中,有兩個樣本會以37%的磷酸進行酸蝕,另外兩個樣本則不做酸蝕處理。所有的樣本皆以掃描式電子顯微鏡進行觀察。第二部份: 將60個未蛀牙的臼齒從中剖半,這120個剖半的臼齒平分作三個組別,每組各40個剖半的臼齒,這40個之中,20個製備至牙本質,另外20個製備至牙釉質。這20個牙本質與牙釉質的樣本中,其中一半的10個樣本進行酸蝕,而另外的10個樣本則不進行酸蝕處理。所有樣本的表面粗糙度以表面粗度儀(profilometer)進行測量。第三部份: 以第二步的樣本同樣進行接觸角的測量。
結果: 和雷射製備的組別相比,以高速磨牙鑽石鑚針製備的牙齒,不論是有無酸蝕的組別,皆具有最平滑的表面,並且有最小的接觸角
結論: 雷射製備的牙齒,比起以高速鑽石鑚針製備的牙齒,其表面粗糙度較為粗糙,並且有較多開放的牙本質小管。然而這並無增加其表面溼潤性。在未來的研究中,鍵結測試需要進一步的研究與討論。
英文摘要 Objective: The surface roughness and wettability of teeth prepared with new erbium dental lasers is not clear. The purpose of this study is to characterize the surface roughness and its influence on wettability of the etched and non etched teeth prepared for complete crowns with high speed diamond burs, Er,Cr:YSGG (Erbium,Chromium:Yttrium,Scandium,Gallium,Garnet) and Er:YAG(Erbium:Yttrium,Aluminium,Garnet) lasers.
Background Data: Erbium dental lasers, on the process of thermomechanical interaction with biological tissues, ablate dental hard tissues resulting in rough surfaces with almost complete removal of smear layer. Adequate surface roughness could improve surface wettability thus enhancing crown seating.
Methods: Part 1: 24 extracted non carious molars were divided into three groups, Er,Cr:YSGG laser, Er:YAG laser and High speed diamond rotary. 4 from each group were prepared into dentin and the other 4 into enamel. 2 samples from each preparation of enamel and dentin were etched with 37% phosphoric acid. All samples were viewed under SEM. Part 2: 60 extracted non carious molars were sectioned in halves. 120 halves were equally divided into the three groups. 20 halves from each group were prepared into dentin, the other 20 into enamel. 10 samples from enamel and dentin samples were etched. Surface roughness for all samples was measured by the profilometer. Part 3: The contact angles for the same samples in Part 2 were measured.
Results: Teeth prepared using high speed diamond burs revealed the smoothest surfaces with the smallest contact angle measured for the etched and non-etched samples compared to lasers prepared samples.
Conclusion: Laser prepared teeth are rougher and showed more open tubules than those prepared with high speed diamonds. However it does not increase the wettability of the surface. Further research for bonding test is recommended.
論文目次 CONTENTS
Chinese Abstract…………………………………………………………………I
English Abstract………………………………………………………………...IV
1Introduction……………………………………………………………………...1
1-1Background……….………………...………………………………………1
1-2 Motivation…………………………….……………….……………….......6
1-3 Purpose………………………………………….……………………….....8
1-4 Hypothesis………………………………………………….………………9
2 Literature Review……………………………………………………………….10
3 Materials and Method…………………………………………………………...18
3-1 Materials…………………………………………………………………….18
3-2 Equipments………………………………………………………………….18
3-3 Methodology...……………………………………………………………...19
3-3-1 Surface Comparisons Under SEM……………………………...……19
3-3-2 Surface Roughness Analysis……………………………….………...22
3-3-3 Contact Angle Measurement…………………………………………23
3-3-4 Statistical Analysis………………………………………………..….24
4 Results…………………………………………………………………………..25
4-1 Scanning Electron Microscope Images………...……….…………………25
4-2 Surface Roughness…………………………………………………..…….26
4-3 Contact Angles…………………………………………………………….27
5 Discussion………………………………………………………………………29
6 Conclusion………………………………………………………………………35
7 Recommendations………………………………………………………………36
References………………………………………………………………………..37
Figures……………………………………………………………………………41
Tables……………………………………………………………………………..71
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