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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林立德 | |
dc.contributor.author | En-Heng Liu | en |
dc.contributor.author | 劉恩亨 | zh_TW |
dc.date.accessioned | 2021-06-13T06:56:43Z | - |
dc.date.available | 2005-08-04 | |
dc.date.copyright | 2005-08-04 | |
dc.date.issued | 2005 | |
dc.date.submitted | 2005-07-27 | |
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Branemark PI, Zarb G, Albrektsson T. Tissue-integrated prostheses: osseointegration in clinical dentistry. Special edition for Nobelpharma. Chicago: Quintessence; 1987. p. 268-71. 37. Rubenstein JE, Ma T. Comparison of interface relationships between implant components for laser-welded titanium frameworks and standard cast frameworks. Int J Oral Maxillofac Implants 1999;14:491-5. 38. Binon PP. Evaluation of machining accuracy and consistency of selected implants, standard abutments, and laboratory analogs. Int J Prosthodont 1995;8:162-78. 39. Hecker DM, Eckert SE. Cyclic loading of implant-supported prostheses: changes in component fit over time. J Prosthet Dent. 2003;89(4):346-51. 40. Rangert B, Jemt T, Jorneus L: Forces and moments on Branemark implants. Int J Oral Maxillofac Implants 1989;4:241-247 41. Skalak R: Biomechanical considerations in osseointegrated prostheses. J Prosthet Dent 1983;49:843-848 42. Kallus T, Bessing C: Loose gold screws frequently occur in full-arch fixed prostheses supported by osseointegrated implants after 5 years. Int J Oral Maxillofac Implants 1994;9:169-178 43. Jemt T, Book K: Prosthesis misfit and marginal bone loss in edentulous implant patients. Int J Oral Maxillofac Implants 1996;11:620-625 44. Klinerberg IJ, Murray GM. Design of superstructures for osseointegrated implant. Swed Dent J 1985;28:63-69 45. Jemt T, Lie A. Accuracy of implant-supported prostheses in the edentulous jaw. Analysis of precision of fit between cast gold-alloy frameworks and master casts by means of a three-dimensional photogrammetric technique. Clin Oral Impl Res 1995;6:172-180. 46. Assif D, Fenton A, Zarb G, Schmitt A. Comparative accuracy of implant impression procedure. Int J Periodont Rest Dent 1992;12:113-121. 47. Millington ND, Leung T. Inaccurate fit of implant superstructures. Part 1: Stresses generated on the superstructure relative to the size of fit discrepancy. Int J Prosthodont 1995 Nov-Dec;8(6):511-6. 48. Eckert SE, Wollan PC. Retrospective review of 1170 endosseous implants placed in partially edentulous jaws. J Prosthet Dent 1998;79:415-21. 49. Taylor TD. Prosthodontic problems and limitations associated with osseointegration. J Prosthet Dent 1998;79:74-8. 50. Kallus T, Bessing C. Loose gold screws frequently occur in full-arch fixed prostheses supported by osseointegrated implants after 5 years. Int J Oral Maxillofac Implants 1994;9:169-78. 51. Goodacre CJ, Kan JY, Rungcharassaeng K. Clinical complications of osseointegrated implants. J Prosthet Dent 1999;81:537-52. 52. Eckert SE, Meraw SJ, Cal E, Ow RK. Analysis of incidence and associated factors with fractured implants: a retrospective study. Int J Oral Maxillofac Implants 2000;15:662-7. 53. Jemt T, Lekholm U, Johansson CB. Bone response to implant-supported frameworks with differing degrees of misfit preload: in vivo study in rabbits. Clin Implant Dent Relat Res 2000;2:129-37. 54. Rangert B, Krogh PHJ, Langer B. Bending overload and implant fracture: A retrospective clinical analysis. Int J Oral Maxillofac Implants 1995;10:326-334. 55. Weinstein AM, Klawitter JJ, Anand SC, Schuessler R. Stress analysis of porous rooted dental implants. J Dent Res 1976;55:772-7. 56. Pietrabissa R, Contro R, Quaglini V, Soncini M, Gionso L, Simion M. Experimental and computational approach for the evaluation of the biomechanical effects of dental bridge misfit. J Biomech. 2000 Nov;33(11):1489-95. 57. Tan KB, Nicholls JI, Implant-abutment screw joint preload of 7 hex-top abutment system. Int Oral Maxillofac Implant1997;16:367-77. 58. Duyck J, Van Oosterwyck H, Vander Sloten J, De Cooman M, Puers R, Naert I. Magnitude and distribution of occlusal forces on oral implants supporting fixed prostheses: an in vivo study. Clin Oral Implants Res 2000;11(5):465-75. 59. Cantwell A, Hobkirk JA. Preload loss in gold prosthesis-retaining screws as a function of time. Int J Oral Maxillofac Implants 2004;19:124-32. 60. Möllersten L, Lockowandt P, Linden LA. Comparison of strength and failure mode of seven implant systems: an in vitro test. J Prosthet Dent 1997;78:582–591. 61. Stegaroiu R, Kusakari H, Nishiyama S, Miyakawa O. Influence of prosthesis material on stress distribution in bone and implant: a 3-dimensional finite element analysis. Int J Oral Maxillofac Implant 1998;13:781-790. 62. Benzing UR, Gall H, Weber H. Biomechanical aspects of two different implant-prosthetic concepts for edentulous maxillae. Int J Oral Maxillofac Implant 1995;10:188-198. 63. Kunavisarut C, Lang LA, Stoner BR, Felton DA. Finite element analysis on dental implant-supported prostheses without passive fit. J Prosthodont 2002;11(1):30-40. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/35523 | - |
dc.description.abstract | 礙於臨床上及製作技術上的限制,要製作一個完全密合的補綴物幾乎是不可能的。因此,決定一個臨床可以接受的補綴物密合度是有必要的。本有限元素分析實驗的目的在於比較三單位牙橋補綴物與支台間的垂直不密合度,對於植體螺釘關節內應力分部的影響。實驗中採用NobleBiocare植體系統的MK IV植體、Multi-unit支台與TorqTite植釘為觀察對象。補綴物是模擬由兩支植體支撐的三單位螺釘固定牙橋,並在遠心支台與補綴物間設定0μm、50μm、100μm、150μm的垂直間隙,來模擬補綴物的不密合度。實驗步驟為依序鎖緊近心支台螺釘、遠心支台螺釘、近心補綴固位螺釘與遠心補綴固位螺釘(支台螺釘的預負載力設為550N;補綴固位螺釘的預負載力設為350N),再於遠心支台上方補綴物施予300N的模擬垂直咬合力。實驗結果顯示在支台螺釘部分最大應力分部於螺紋部與螺釘頭部間的連接體處,當密合度愈大時,應力數值愈大,並集中在螺釘連接體接近螺紋部分。近心支台螺釘最大的Von Mises應力發生在施加模擬咬合力後,依密合度小到大的順序為:24.0%, 26.7%, 34.1%, and 41.8% of the ultimate tensile strength(1100 N)。在補綴固位螺釘方面,應力也是主要集中在螺釘的連接體處,而且數值明顯比支台螺釘大許多。最大Von Mises應力發生在近心補綴固位螺釘的連接體處,在四支螺釘都鎖緊後,其數值依密合度小到大的順序為:72.3%, 75.1%, 75%, and 88% of the ultimate tensile strength(1100 N)。在施加模擬咬合力後,唯有150μm不密合度這組的最大Von Mises應力明顯提高至0.94 GPa (90.7% of the ultimate tensile strength)。其餘三組則變化不明顯。在本實驗的條件限制下顯示三單位牙橋補綴物的垂直不密合度在150μm這組對近心補綴固位螺釘造成的最大應力明顯大於其餘三種密合度。另外,在支台螺釘方面,最大應力皆沒有大過ultimate tensile strength。 | zh_TW |
dc.description.abstract | Purpose: The purpose of this study was to use finite element analysis to investigate the effect of misfit prostheses on the stress distribution in the abutment screws and prosthetic screws.
Materials and Methods: A 3-dimensional finite element models, including two 4.0-mm-diameter MK IV implant fixtures, two 2.0-mm-height / 4.0-mm-diameter Multi-unit abutment with TorqTite abutment screws and TorqTite prosthetic screws, suprastructure, and bone block were constructed. The geometries of four suprastructures were designed to simulate 0μm、50μm、100μm、150μm gaps between suprastructure and distal abutment. The loading procedure is in the sequence : mesial abutment screw, distal abutment screw, mesial prosthetic screw, distal prosthetic screw, and adding 300N simulated biting force on distal area of suprastructure. Results: When the implant system got balance without external loading, the maximum Von Mises stress of mesial abutment screw were 23.5%, 25.6%, 32.5%, and 40.0% of the ultimate tensile strength(1100 N) in sequence of 0 to 150μm gap. With a simulated biting force of 300N, they became 24.0%, 26.7%, 34.1%, and 41.8%. Regarding two prosthetic screws, the maximum Von Mises stress occurred in mesial one, the values were 72.3%, 75.1%, 75%, and 88% of the ultimate tensile strength in sequence of 0 to 150μm gap. After simulated biting load, the value increased to 90.7% of the ultimate tensile strength in 150μm-gap model. Conclusions: Prosthesis misfit influenced the pattern and magnitude of stress distribution in the abutment and prosthetic screws. The stress of mesial prosthetic screw in 150μm-gap model was obviously different from the other three models. All the three vertical discrepancy, 50μm, 100μm, and 150μm, between prosthetic and abutment could be closed after the screws were locked. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T06:56:43Z (GMT). No. of bitstreams: 1 ntu-94-R90422009-1.pdf: 3957562 bytes, checksum: 9067f8a9101a7bd48ad4454732ab7434 (MD5) Previous issue date: 2005 | en |
dc.description.tableofcontents | Introduction
1. Implant Screw Joint Stability 1 1.1 Clinical Complication – Screw Loosening or Fracturing 1 1.2 Screw Joint Mechanics 3 1.3 Optimum Screw Tension 5 2. Misfit of Dental Implant Components 7 2.1 Misfit between Pre-mechanic Implant Components 7 2.2 Dental Implant Suprastructure Misfit 7 2.3 Clinically Acceptable Misfit 9 Purpose 11 Materials and methods 13 1. Geometry and Finite Element Model 13 1.1 Implant 13 1.2 Suprastructure 13 1.3 Full Model Including Implant, Suprastructure, and Bone Block 14 2. Materials 14 3. Contrain 14 4. Boundary Condition 15 5. Simulation of Screw Locking 15 6. Loading Procedures 16 Results 18 1. Stress Distribution at Mesial Abutment Screw 18 2. Stress Distribution at Distal Abutment Screw 19 3. Stress Distribution at Mesial Prosthetic Screw 20 4. Stress Distribution at Distal Prosthetic Screw. 21 Discussion 22 1. Applications of Finite Element Analysis in Dental Implant Researches 22 2. Abutment Screw 24 2.1 Stress distribution pattern in mesial abutment screw. 24 2.2 Stress distribution pattern in distal abutment screw .26 2.3 Value of abutment screw preload 27 3. Prosthetic screw29 3.1 Stress distribution pattern in mesial prosthetic screw 29 3.2 Stress distribution pattern in distal prosthetic screw 30 3.3 Value of prosthetic screw preload 31 4. Screw Joint Integrity 33 5. Stress Distribution in Bone 34 Conclusion 35 Figures Tables References Figures Figure 1. Cross-sectional view of three-dimensional finite element models of Branemark System 4.0 × 10-mm Mark IV implant (purple), MultiUnit abutment (yellow), MultiUnit abutment screw (green) and prosthetic screw(blue) with exact dimensions of thread helix. Figure 2. The geometric feature of a 3-unit suprastructure CAD model which represented lower premolar (mesial retainer), second premolar (pontic), and first molar (distal retainer). Figure 3. Full geometry model including implants, suprastructure, and bone block. The bone block is with 2-mm-thick cortical bone at the surface. Figure 4. Finite element model of the full investigated model Figure 5. Finite element model of the mesial side bolts Figure 6. Finite element model of the distal side bolts Figure 7. The location of four kinds of vertical discrepancy. Figure 8. The constrain of analysis model. Figure 9. Contact body and the symmetric plane at the analysis model. Figure 10. Simulation technique about screw locking. Figure 11. The biting pressure applied on the distal area of suprastructure. Figure 12. Stress distribution of mesial abutment screw in fit model at 5th , 10th, 15th , 16th , 20th , 21th , 25th , 30th increments. Maximum stresses are located around shank of screw. Figure 13. Stress distribution of mesial abutment screw in 150μm-misfit model at 5th , 10th, 15th , 16th , 20th , 21th , 25th , 30th increments. Maximum stresses are located around shank of screw. Maximum stresses are located around shank of screw and concentrated at mesial part obviously. Figure 14. The maximum Von Mises stress of mesial abutment screw at each increment Figure 15. Stress distribution of distal abutment screw in fit model at 5th , 10th, 15th , 16th , 20th , 21th , 25th , 30th increments. Maximum stresses are located around shank of screw. Figure 16. Stress distribution of distal abutment screw in 150μm-misfit model at 5th , 10th, 15th , 16th , 20th , 21th , 25th , 30th increments. Maximum stresses are located around shank of screw. Figure 17. The maximum Von Mises stress of distal abutment screw at each increment Figure 18. Stress distribution of mesial abutment screw in fit model at 5th , 10th, 15th , 16th , 20th , 21th , 25th , 30th increments. Maximum stresses are located around shank of screw. Maximum stresses are located around shank of screw. Figure 19. Stress distribution of mesial prosthetic screw in 150μm-misfit model at 5th , 10th, 15th , 16th , 20th , 21th , 25th , 30th increments. Maximum stresses are located around shank of screw. Maximum stresses are located around shank of screw and concentrated at mesial part obviously. Figure 20. The maximum Von Mises stress of mesial prosthetic screw at each increment Fig. 21. Stress distribution of distal prosthetic screw in fit model at 5th , 10th, 15th , 16th , 20th , 21th , 25th , 30th increments. Maximum stresses are located around shank of screw. Figure 22. Stress distribution of distal prosthetic screw in 150μm-misfit model at 5th , 10th, 15th , 16th , 20th , 21th , 25th , 30th increments. Maximum stresses are located around shank of screw. Figure 23. The maximum Von Mises stress of distal prosthetic screw at each increment Tables Table 1. Mechanical Properties of Each Material Type. | |
dc.language.iso | en | |
dc.title | 三單位植體補綴物不密合度對於植體螺釘關節
內部應力分佈的影響 | zh_TW |
dc.title | The Influence of Three Unite Suprastructure Misfit on Stress Distribution in Implant Screw Joints | en |
dc.type | Thesis | |
dc.date.schoolyear | 93-2 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 王若松 | |
dc.contributor.oralexamcommittee | 許明倫 | |
dc.subject.keyword | 植體,補綴物,密合度,螺釘關節,應力分部, | zh_TW |
dc.subject.keyword | Three Unite Suprastructure Misfit,Stress Distribution,Implant Screw Joints, | en |
dc.relation.page | 64 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2005-07-28 | |
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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