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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林俊彬 | |
dc.contributor.author | Chih-Ming Lu | en |
dc.contributor.author | 呂志明 | zh_TW |
dc.date.accessioned | 2021-06-13T03:23:45Z | - |
dc.date.available | 2006-08-03 | |
dc.date.copyright | 2006-08-03 | |
dc.date.issued | 2006 | |
dc.date.submitted | 2006-07-29 | |
dc.identifier.citation | 李偉明、林俊彬,鎳鈦旋轉器械之斷裂機轉的探討,國立台灣大學醫學院臨床牙醫學研究所牙髓病學組 2001.
吳錫侃,鎳鈦形狀金屬合金及鈦鋁介金屬材料之研究,台灣大學機械及材料所 2001. 呂玉蓉、林俊彬、陳文斌,根管治療用之鎳鈦旋轉器械力學行為分析 2005. Buehler WH, Gilfrich JV, Wiley RC. Effect of low temperature phase changes on the mechanical properties of alloy near composition Ni-Ti. Journal of Applied Physics 1963; 34; 1475-1477. Bramante CM, Betti LV. Comparative analysis of curved root canal preparation using nickel-titanium instruments with or without EDTA. J. Endodon 2000;26:278–80. Berutti E, Giorgio C, Gaviglio I, Eng D, Andrea I, Eng D. Comparative Analysis of Torsional and Bending Stresses in Two Mathematical Models of Nickel-Titanium Rotary Instrument: ProTaper versus ProFile. The American Association Endodon 2003; 29:15-19. Bahia MGA, Martins RC, Gonzalez BM & Buono VTL. Physical and mechanical characterization and the influence of cyclic loading on the behaviour of nickel-titanium wires employed in the manufacture of rotary endodontic instruments. Int. Endodon. J., 38, 795–801, 2005. Civjan S, Huget EF, DeSimon LB. Potential applications of certain nickel-titanium(nitinol) alloys. J Dent Res, 1975;54: 89-96 Cunningham CJ, Senia ES. A three-dimensional study of canal curvatures in the mesial roots of mandibular molars. J Endodon 1992;18:294-300 Camps JJ, Pertot WJ. Torsional and stiffness properties of Canal Master U stainless steel and nickel titanium instruments J Endodon 1994;20:395-8. Cohen S, Burns RC. Pathways of the pulp. 7th ed. St. Louis: Mosby-Year Book, Inc., 1998:255. Dederich DN, Zakariasen KL. The effects of cyclical axial motion on rotary endodontic instrument fatigue. Oral Surg 1986;61:192-6. Fuchs HO, Stephens RI. Metal fatigue in engineering, John Wiley, Inc., New york, 1980. Gutierrez JH, Garcia J. Microscope and macroscopic investigation of results of mechanical preparation of root canals. Oral Surg 1968; 25: 108-116. Glosson CR, Haller RH, Dove SB, del Rio CE. A comparison of root canal preparations using Ni-Ti hand, Ni-Ti engine driven, and K-Flex endodontic instruments. J Endodon, 1995;21:146-51. Gambarini G. Torsional and cyclic fatigue of ProFile NiTi rotary instruments. J Evol Dent 1999;2:4-14. Mahir Günday, Hesna Sazak and Yy ́ldy ́z Garip, A Comparative Study of Three Dif-ferent Root Canal Curvature Measurement Techniques and Measuring the Canal Access Angle in Curved Canals. J Endod., 31, 796-798, 2005. Hankins PJ, ElDeeb ME. An evaluation of the canal master, balanced-force, and step-back techniques. J Endod 1996;22:123–30. Hülsmann M, Heckendorff M, Lennon A. Chelating agents in root canal treatment: mode of action and indications for their use. Int Endod J. 2003;36:810–30. Kazemi RB, Stenman E, Spangberg LSW. The endodontic file is a disposable instrument. J Endod 1995;21:451. Kim SK, Yun HH, A comparison of the shaping abilities of 4 nickel-titanium rotary instruments in simulated root canals. Oral Surg Oral Med Oral Pathol Oral Radiol. Endod. 2003;95:228-33 Lee JH, Park JB, Andreasen GF, Lake RS. Thermo-mechanical study of NiTi alloy. Journal of Biomechanical Materials Research 1988; 22:573-588. Michelich RJ, Schultz HH. Instrument of root canals in molars using the step-down technique. J Endodon 1982; 8(12):550-554. Pruett JP, Clement DJ, Carnes DL. Cyclic fatigue testing of nickel-titanium endodontic instruments. J Endodon 1997;23:77–85. Martin B, Zelade G, Varela, Bahillo, Magan F, Ahn S. Rodriguez C. Factor influencing the fracture of nickel-titanium rotary instruments. Int Endodon J 2003; 36:262-266. Pettiette MT, Delano EO, Trope M. Evaluation of success rate of endodontic treat-ment performed by students with stainless-steel K-files and nickel-titanium hand files. J Endodon 2001;27:124–7. Peters OA, Peters CI, Schönenberger K, Barbakow F. ProTaper rotary root canal preparation: assessment of torque and force in relation to canal anatomy. Int Endod J 2003;36:93–9. Paque ́ F, Musch U, Hu ̈ lsmann M. Comparison of root canal preparation using RaCe and ProTaper rotary Ni–Ti instruments. International Endodontic Journal 2005; 38: 8–16. Ruddle CJ. The ProTaper endodontic system: geometries, features, and guidelines for use. Dent Today 2001;20:60-67. Ruddle C. Cleaning and shaping the root canal system. In: Cohen S, Burns RC, eds. Pathways of the pulp. 8th ed. St. Louis: Mosby, 2002:231–92. Sommer RF, Ostrander FD, Crowley MC. Clinical Endodontics, 1956; 301-302. Sam W, Schneider. A comparison of canal preparations in straight and curved root canals. Oral Surg 1971; 28:271-275. Schneider SW. A comparison of canal preparations in straight and curved root canals. Oral Surg Oral Med Oral Pathol 1971;32:271–5. Schilder H. Cleaning and Shaping the root canal. Dent Clin North Am 1974; 18:269-296. Stoeckel D, Yu W Superelastic Ni-Ti wire. Wire Journal International 1991;March:45-50 Serene TP, Adams JD, Saxena A. Nickel-Titanium Instruments: Applications in endodontics. St Louis MO, USA: Ishiyaku Euro America, Inc. 1995. Schafer E, Joachim Tepel. Relation between design features of endodontic instruments and their properties. Part 3. Resistance to bending and fracture. Endod 2001;27:299-303. Thompson SA, Dummer PMH Shaping ability of Profile .04 taper series 29 rotary nickel-titanium instruments in simulated root canals. Part I. International endodontic journal 1997;30:1-7 Turpin YL, Chagneau F, Vulcain JM. Impact of Two Theoretical Cross-sections on Torsional and Bending Stresses of Nickel-Titanium Root canal Instrument models. J Endodon 2000; 26:414-417. Turpin YL, Chagneu F, Bartier O, Cathelineau G, Vulcain M. Impact of Torsional and Bending Inertia on Root Canal Instruments. J Endodon 2001; 27:333-336. Weine FS Endodontic therapy, 3rd ed. St. Louis: CV Mosby, 1982:288-306 Walia H, Brantley WA, Gerstein H. An initial investigation of the bending and torsion properties of nitinol root canal file. J Endodon 1988; 14:346-351. Wildey WL, Senia ES, Montgomery S. Another look at root canal instrumentation. Oral Surg Oral Med Oral Pathol 1992;74:499 –507. Youssef H, Rene S, Geoff B, Bernard S, Claude A Dynamic and cyclic fatigue of engine-driven rotary nickel-titanium endodontic instruments J Endodon 1999;25(6):434-40 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/31898 | - |
dc.description.abstract | 彈性極佳的鎳鈦旋轉器械被賦予期望能夠去減少根管修形產生肩台形成、根尖孔敞開、根尖區穿孔、根管偏移等併發症的機會,並藉此提高彎曲牙根根管治療的成功率;可是上述根管修形之併發症依然是時有所聞,不易移除的器械斷裂病例更是曾出不窮,因此有必要對鎳鈦旋轉器械的基本金屬特性再加以深入探討;雖然先前學者的動態或是靜態研究,對此類問題也提出了看法,例如週期性疲勞、或者是不當施力方式等,但是並無研究是針對器械本身不同幾何形狀的變化,以及其受力負載後的撓曲力學行為影響。所以本研究的目的,是使用有別於ADA 28號的測試方式,探討鎳鈦旋轉器械進入不同長度之彎曲根管後、器械本身的幾何形態與撓曲度之力學變化,並找出鎳鈦旋轉器械進入根管修形時,器械的彎曲之模式、進而對臨床醫師及一般研究者提出預防器械斷裂與如何達到安全的根管修形之建議。本研究的前導實驗,分析出台灣牙醫師最常用的鎳鈦旋轉器械為ProTaper system,為了模擬鎳鈦旋轉器械進入彎曲根管,所形成的彎曲行為,我們使用一塊斜度為十五度的金屬塊負載於不同的鎳鈦旋轉器械(ProTaper system F1, F2 & F3)之上,使得鎳鈦旋轉器械在不同的彎曲限制點(3, 6 & 9 mm)改變下,受力下壓位移至少使得鎳鈦旋轉器械彎曲超過Schneider角度50°,過程中除了記錄負載力量之大小、下壓位移的距離外、我們並使用數位影像記錄來進行鎳鈦旋轉器械的Schneider角度與Pruett角度之分析,本實驗的彎曲測試的結果,並將與三維有限元素法之彎曲測試結果來做比較分析。
當以Schneider技術來評估不同限制點的同一鎳鈦器械時,結果顯示、當限制點越往後移動時,鎳鈦旋轉器械受力彎曲時,產生大量金屬分子晶相由Austenite轉變到Martensite的彎曲角度也會隨之減小;但是在彈性限度的臨界角度的比較上,卻是不受器械與限制點的影響,都是45°,此時鎳鈦器械都會脫離超彈性的特性,因而進入永久形變區。另一方面在Pruett角度的評估上,我們的實驗的結果也顯示,當限制點向後移動時、就單一器械本身來說,F2與F3的大量金屬分子之晶相轉換角度有逐漸減小的趨勢,而F1卻是無明顯的差異;在限制點位於9 mm時,F1,F2與F3因受力彎曲而進入大量分子參與晶相轉變的角度相近,並且有相近的,重要的是彈性限度的臨界角度也相近;總而言之、鎳鈦旋轉器械進入不同長度之彎曲根管時、不僅僅是根管彎曲的角度與曲率半徑對根管修形的難度,或是說對器械本身的撓曲力學行為會有所改變、在限制點的位置不同所模擬彎曲根管的長度,或是說進入此長度的器械尺寸,都扮演極為重要的角色;也就說當根管彎曲角度越大,曲率半徑越小,彎曲根管的長度越長、或者是器械尺寸越大,對於彎曲根管的修行來說都是較不利的。三維有限元素法之彎曲測試結果也顯示與本實驗各項結果有極高的相關連性,證明本實驗設計與結果足以提供臨床醫師與研究人員當成參考指標。 | zh_TW |
dc.description.abstract | With the advantages of material technology, nickel titanium (Ni-Ti) files are introduced to facilitate the instrumentation of curved canals due to its superior flexibility to minimize operative complications, such as ledging, elbow, perforation and transportation. They also have been expected for-ward to increase the success rate of root canal therapy. Nevertheless, separation is still a subject of debate with Ni-Ti rotary instruments. Thus, the purpose of this study was aimed to compare the mechanical behaviors of different geometries of endodontic Ni-Ti rotary instruments via simula-tive variable curvatures of root canal during shaping. ProTaper® F1, F2, and F3 were selected due to the different geometries of design and most ex-ercised in Taiwan. Each group contained 10 files progressing static bending test in different restricted points experimentally by universal testing ma-chine. The results showed that according to the evaluation of Schneider Technique, the restricted points move backward from 3 mm to 9 mm, the bending angle of maximal crystal transformation will be minimized, which is getting abundantly transforming Austenite into Martensite. However, among the ProTaper R F1, F2, and F3 or the different restricted points, the critical angle of elasticity always came close to 45。. On the other hand, ac-cording to the evaluation of Pruett Technique, our results also showed when the restricted point moving backward from 3 mm to 9 mm, the bending an-gle of maximal crystal transformation of ProTaper R F2 and F3 had the ten-dency to reduce gradually, but F1 did not have obvious difference; ProTa-per R F1, F2, and F3 have the approximative angle, whatever the bending angle of maximal crystal transformation, the critical angle of elasticity. It means that if the root canals have a severe angle, a small radius of curve, a long working length or the usage of large instruments, there are more unfa-vorable to the shaping of root canals. And The experimental results corre-lated very well with FEM analysis. In conclusion, these data of static bend-ing test can provide useful information for instrument under cyclic tensile and compressive stresses which can cause fracture failure. Furthermore, it is important that the limitations of instruments using rotary Ni-Ti instruments should be known and the modification of geometry and material should be further investigated in the future. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T03:23:45Z (GMT). No. of bitstreams: 1 ntu-95-P91422010-1.pdf: 4384164 bytes, checksum: c23fbc65ce5973e00f8aba50110897f0 (MD5) Previous issue date: 2006 | en |
dc.description.tableofcontents | 中文摘要..................................................I
英文摘要.................................................Ⅲ 總目錄...................................................Ⅵ 圖目錄...................................................Ⅹ 表目錄.................................................ⅩⅢ References............................................ ⅩⅢ 附件一.......................................... ⅩⅢ 總目錄 第一章 前言.............................................1 第二章 文獻回顧...........................................4 2.1 根管彎曲形態的分析...................................4 2.2 根管治療器械的發展....................................6 2.3 鎳鈦旋轉器械的週期性疲勞(cyclic fatigue)...........8 2.4 根管器械角度偏斜與斷裂的測試標準.....................9 2.5有限元素法簡介......................................10 第三章 研究目的.........................................12 第四章 材料方法與研究步驟...............................14 4.1 研究主要設備介紹....................................14 4.2 前導實驗.............................................14 4.3 靜態彎曲測試方面(Static Bending Test)..............15 4.3.1 樣本的預備.........................................15 4.3.2 實驗模具的設計....................................15 4.3.2.1 金屬塊的製作....................................16 4.3.2.2 金屬塊角度的選擇.................................16 4.3.2.3 夾具的製作.....................................16 4.3.3 鎳鈦旋轉器械的選擇.................................17 4.3.3.1 ProTaper® system的選擇..........................17 4.3.3.2 ProTaper® system的簡介...........................17 4.3.3.3 實驗的分組方式..................................18 4.3.3.4 檢視...........................................18 4.4 靜態彎曲測試操作方法................................18 4.5 鎳鈦旋轉器械的彎曲角度量測...........................19 4.5.1 角度計算方式.......................................19 4.5.2 SA1與SA2之定義與量測..............................19 4.5.3 PA1與PA2之定義與量測..............................20 第五章 結果.............................................21 5.1 問卷部份............................................21 5.2 靜態彎曲測試方面(Static Bending Test)...............22 5.2.1 三段式線性曲線圖...................................22 5.2.2 器械尖端位移距離與彎曲角度間的關係................22 5.2.3 器械彎曲角度與超彈性區間之關係....................23 (a) 在Schneider's angle (SA)方面........................23 (b) 在Pruett's angle (PA)方面............................24 (c) 超彈性平台之作用力方面..............................25 5.2.4 Pruett's angle與曲率半徑r之變化................25 5.3 應證三維有限元素分析.............................25 第六章 討論..........................................26 6.1 問卷部份............................................26 6.2 實驗模具設計方面....................................27 6.3 靜態彎曲測試方面(Static Bending Test)...............28 6.3.1 超彈性平台(superslastic plateau )的形成...........28 6.3.2 負載角度曲線圖與應力應變曲線圖之比較..............29 (a)晶相轉變 (transformation of crystal phase) 之探討....29 (b) SA-FTE Curvature上晶相轉變之探討.....................30 (c) SA-Load Curvature晶相轉變之探討......................31 (d) PA-Load Curvature晶相轉變之探討......................32 (e) 超彈性平台 (superslastic plateau ) 與作用力之關係....33 6.4 Schneider與Pruett Technique的比較....................34 (a) Schneider Technique的缺點............................34 (b) 曲率半徑 (radius of curve) 對於根管修形之探討.......34 (c) 曲率半徑 (radius of curve) 與根管修形器械尺寸之探討..35 (d) 根管彎曲長度 (length of curve root canal) 與根管彎曲截面積(cross-section of curve root canal)對於根管修形............35 6.5應證三維元素分析......................................36 (a) 寬敞根管修形與單側切削 (unilateral shaping) 的應證...36 (b) 調校三維有限元素法 (Finite element method) 之參數....36 第七章 結論.................................38 第八章 未來展望.........................................39 圖目錄 圖1. Schneider technique(Schneider 1971).............................................40 圖2. Pruett technique(Pruett 1997)..........................................................40 圖3. 各種根管彎曲度之計算方式.......................................................41 圖4. ProFile及Hero根管器械之蒙麥斯應力彎 曲作用(Turpin 2000, Berutti 2003)..............................................42 圖5. ProTaper模擬進入彎曲根管尖端 (呂玉蓉、林俊彬、陳文斌2005)...............................................43 圖6. 萬有拉力測試機:Instron 5566, Canton, MA, USA)....................44 圖7. A method previously described by Gambarini 1999......................44 圖8. A new testing method described by Pin Lin & W.P. Cheng 2005...............................................................................................45 圖8-1. PT R=3 mm, E=9 mm, EC=3 mm/min.......................................46 圖8-2. PT R=6 mm, E=15 mm, EC=3 mm/min.....................................46 圖8-3. PT R=9 mm, E=18 mm, EC=3 mm/min.....................................46 圖9. ProTaper的橫切面........................................................................47 圖10. ProTaper的商品目錄與錐度變化..............................................47 圖11. 立體顯微鏡(Leica MZ8, Heebrugg, Switzerland)....................48 圖12-1. ProTaper在R3E9的條件下, 所得到的Load Extension Curve............................................49 圖12-2. ProTaper在R6E15的條件下, 所得到的Load Extension Curve............................................49 圖12-3. ProTaper在R9E18的條件下, 所得到的Load Extension Curve............................................50 圖12-4. Hysteresis loop of stress strain curve of ideal NiTi alloy.............................................51 圖13. ProTaper F1在限制點3 mm時, 每間隔1 mm所擷取的影像.....................................................52 圖14. Schneider Technique的計算.......................................................53 圖14-1. SA1、SA2與SA2-SA1之定義...............................................54 圖15. Pruett Technique的計算.............................................................55 圖15-1. PA1、PA2與PA2-PA1之定義.............................................56 圖16-1. R3E9 SA FTE curve...................................................................57 圖16-2. R6E15 SA FTE curve.................................................................57 圖16-3. R9E18 SA FTE curve.................................................................58 圖17-1. R3E9 Load SA curve..................................................................58 圖17-2. R6E15 Load SA curve................................................................59 圖17-3. R9E18 Load SA curve................................................................59 圖17-4. F1的Load SA Curvature...........................................................60 圖17-5. F2的Load SA Curvature...........................................................60 圖17-6. F3的Load SA Curvature...........................................................61 圖18-1. R3E9 Load PA curve..................................................................61 圖18-2. R6E15 Load PA curve................................................................62 圖18-3. R9E18 Load PA curve................................................................62 圖18-4. ProTaper F1 Load PA curve.......................................................63 圖18-5. ProTaper F2 Load PA curve.......................................................63 圖18-6. ProTaper F3 Load PA curve.......................................................64 圖19-1. R3E9 PA FTE curve.................................................................64 圖19-2. R6E15 PA FTE curve...............................................................65 圖19-3. R9E18 PA FTE curve.................................................................65 圖20-1. R3E9 Radius PA curve...............................................................66 圖20-2. R6E15 Radius PA curve.............................................................66 圖20-3. R9E18 Radius PA curve.............................................................67 圖21-1. R3E9 SA PA curve...................................................................67 圖21-2. R6E15 SA PA curve.................................................................68 圖21-3. R9E18 SA PA curve.................................................................68 圖22-1. The Load-LCE curve of F1 R6E9 between FEA & experimental study...................................................69 圖22-2. The Load-LCE curve of F2 R6E9 between FEA & experimental study...................................................70 表目錄 表一、ProTaper F1, F2 & F3之幾何結構...............................71 表二、ProTaper F1, F2, F3之分組......................................72 表三、鎳鈦旋轉器械於台灣牙醫師 使用的市場佔有率........................................................73 表四、台灣牙醫師使用鎳鈦旋轉器械 最常遭遇的問題統計表................................................74 表五、各不同限制點所產生的 臨界角度與器械尖端下降之關係................................75 表六、不同限制點的SA1與SA2之關係.............................76 表七、不同限制點的PA1與PA2之關係.............................77 References................................................................................78 附件一......................................................................................82 | |
dc.language.iso | zh-TW | |
dc.title | 根管治療用鎳鈦旋轉器械之幾何形態與撓曲度之力學分析 | zh_TW |
dc.title | Mechcnics Analysis of Geometry and Bedning Angulation of Endodontic Nickel - Titanium Rotary Instrumentation | en |
dc.type | Thesis | |
dc.date.schoolyear | 94-2 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 陳文斌 | |
dc.contributor.oralexamcommittee | 藍萬烘 | |
dc.subject.keyword | 鎳鈦旋轉器械,限制點,Schneider角度,Pruett角度,曲率半徑,三維有限元素法, | zh_TW |
dc.subject.keyword | Ni-Ti rotary instruments,restricted point,Schneider angle,Pruett angle,radius of curve,Finite element method, | en |
dc.relation.page | 100 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2006-07-29 | |
dc.contributor.author-college | 醫學院 | zh_TW |
dc.contributor.author-dept | 臨床牙醫學研究所 | zh_TW |
顯示於系所單位: | 臨床牙醫學研究所 |
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