The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지
DOI QR코드

DOI QR Code

Finite element analysis on the connection types of abutment and fixture

수종의 내부연결형 임플란트에서 연결부의 형태에 따른 응력분포의 유한요소 분석

  • Jung, Byeong-Hyeon (Department of Prosthodontics, School of Dentistry, Chosun University) ;
  • Lee, Gyeong-Je (Department of Dentistry, Wonju College of Medicine, Yonsei University) ;
  • Kang, Dong-Wan (Department of Prosthodontics, School of Dentistry, Chosun University)
  • 정병현 (조선대학교 치의학전문대학원 보철학교실) ;
  • 이경제 (연세대학교 원주의과대학 치과학교실) ;
  • 강동완 (조선대학교 치의학전문대학원 보철학교실)
  • Received : 2012.03.27
  • Accepted : 2012.04.12
  • Published : 2012.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose: This study was performed to compare the stress distribution pattern of abutment-fixture connection area using 3-dimensional finite element model analysis when 5 different implant systems which have internal connection. Materials and methods: For the analysis, a finite element model of implant was designed to locate at first molar area. Stress distribution was observed when vertical load of 200 N was applied at several points on the occlusal surfaces of the implants, including center, points 1.5 mm, 3.0 mm away from center and oblique load of 200 N was applied $30^{\circ}$ inclined to the implant axis. The finite element model was analyzed by using of 3G. Author (PlassoTech, California, USA). Results: The DAS tech implant (internal step with no taper) showed more favorable stress distribution than other internally connected implants. AS compare to the situations when the loading was applied within the boundary of implants and an oblique loading was applied, it showed higher equivalent stress and equivalent elastic strain when the loading was applied beyond the boundary of implants. Regardless of loading condition, the abutments showed higher equivalent stress and equivalent elastic strain than the fixtures. Conclusion: When the occlusal contact is afforded, the distribution of stress varies depending on the design of connection area and the location of loading. More favorable stress distribution is expected when the contact load was applied within the diameter of fixtures and the DAS tech implant (internal step with no tapering) has more benefits than the other design of internally connected implants.

연구 목적: 본 연구는 3차원 유한요소분석을 통해 특징적인 내부연결구조를 갖는5종의 임플란트의 고정체와 지대주의 연결방식에 따른 응력분산을 알아보고자 하였다. 연구 재료 및 방법: 본 실험을 위한 유한요소모델은 하악 제1대구치부에 임플란트가 식립되고 상부구조물로 3형 금합금을 사용하는 것으로 가정하였다. 응력분산은 200 N의 하중이 교합면의 중심, 중심에 1.5 mm 외측, 중심에서 3.0 mm 외측에 수직으로 가해지고 임플란트의 장축과 $30^{\circ}$의 각도로 경사하중이 가해지도록 하여 분석하였다. 유한요소모델에 대한 해석작업은 3G.Author (PlassoTech, California, USA)를 사용하여 이뤄졌다. 결과: 경사가 없는 내부계단 구조를 가지는 DAS tech의 임플란트의 경우, 내부연결구조를 갖는 다른 임플란트에 더 유리한 응력분산을 보였다. 하중이 임플란트 고정체의 외형선 이내에 가해지는 경우와 비교하여 외형선 바깥이나 경사력으로 전해지는 경우 더 높은 응력을 보였으며 하중조건과 관계없이 임플란트 고정체보다는 지대주에 더 큰 응력이 집중되었다. 결론: 교합력이 가해졌을 때 응력분산은 임플란트의 연결부의 형태와 하중이 가해지는 위치에 따라 달라졌으며 내부계단 구조를 가지는 DAS tech의 임플란트를 사용한 경우와 고정체의 외형선 이내에 하중이 가해졌을 경우에 더 유리한 응력분산을 보였다.

Keywords

References

  1. Branemark PI, Zarb GA, Albrektsson T (eds.): Tissue integrated prostheses. Osseointegration in clinical dentistry. Chicago; Quintessence; 1985.
  2. Adell R, Lekholm U, Pockler B, Branemark PI. A 15 year study of osseointegrated implants in the treatment of the edentulous jaw. Int J Oral Surg 1981;10:387-416. https://doi.org/10.1016/S0300-9785(81)80077-4
  3. Duyck J, Naert IE, Van Oosterwyck H, Van der Sloten J, De Cooman M, Lievens S, Puers B. Biomechanics of oral implants: a review of the literature. Technol Health Care 1997;5:253-273.
  4. Adell R, Lekholm U, Rockler B, Branemark P-I, Lidhe J, Eriksson B, Sbordone L. Marginal tissue reactions at osseointegrated titanium fixtures (I) A 3 year longitudinal prospective study. Int J Oral Surg 1986;15:39-52. https://doi.org/10.1016/S0300-9785(86)80010-2
  5. Lindquist LW, Rockler B, Carlsson GE. Bone resorption around fixtures in edentulous patients treated with mandibular fixed tissue- integrated prostheses. J Prosthet Dent 1988;59:59-63. https://doi.org/10.1016/0022-3913(88)90109-6
  6. Block MS, Gardiner D, Kent JN, Misiek DJ, Finger IM, Guerra L. Hydroxyapatite-coated cylindrical implants in the posterior mandible: 10-year observations. Int J Oral Maxillofac Implants 1996;11:626-33.
  7. van Steenberghe D, Lekholm U, Bolender C, Folmer T, Henry P, Herrmann I, Higuchi K, Laney W, Linden U, Astrand P. Applicability of osseointegrated oral implants in the rehabilitation of partial edentulism: a prospective multicenter study on 558 fixtures. Int J Oral Maxillofac Implants 1990;5:272-81.
  8. Isidor F. Loss of osseointegration caused by occlusal load of oral implants. A clinical and radiographic study in monkeys. Clin Oral Implants Res 1996;7:143-52. https://doi.org/10.1034/j.1600-0501.1996.070208.x
  9. Brunski JB. Biomaterials and biomechanics in dental implant design. Int J Oral Maxillofac Implants 1988;3:85-97.
  10. Zarb GA, Schmitt A. The longitudinal clinical effectiveness of osseointegrated dental implants: the Toronto study. Part III: Problems and complications encountered. J Prosthet Dent 1990;64:185-94. https://doi.org/10.1016/0022-3913(90)90177-E
  11. Merz BR, Hunenbart S, Belser UC. Mechanics of the implantabutment connection: an 8-degree taper compared to a butt joint connection. Int J Oral Maxillofac Implants 2000;15:519-26.
  12. Becker W, Becker BE. Replacement of maxillary and mandibular molars with single endosseous implant restorations: a retrospective study. J Prosthet Dent 1995;74:51-5. https://doi.org/10.1016/S0022-3913(05)80229-X
  13. Jemt T, Laney WR, Harris D, Henry PJ, Krogh PH Jr, Polizzi G, Zarb GA, Herrmann I. Osseointegrated implants for single tooth replacement: a 1-year report from a multicenter prospective study. Int J Oral Maxillofac Implants 1991;6:29-36.
  14. Levine RA, Clem DS 3rd, Wilson TG Jr, Higginbottom F, Saunders SL. A multicenter retrospective analysis of the ITI implant system used for single-tooth replacements: preliminary results at 6 or more months of loading. Int J Oral Maxillofac Implants 1997;12:237-42.
  15. Han SU, Park HO, Yang HS. stress analysis of supporting tissues and implants according to implant fixture shapes and implant-abutment connections. J Korean Acad Prosthodont 2004;42:226-37.
  16. Levine RA, Clem D, Beagle J, Ganeles J, Johnson P, Solnit G, Keller GW. Multicenter retrospective analysis of the solidscrew ITI implant for posterior single-tooth replacements. Int J Oral Maxillofac Implants 2002;17:550-6.
  17. Norton MR. An in vitro evaluation of the strength of an internal conical interface compared to a butt joint interface in implant design. Clin Oral Implants Res 1997;8:290-8. https://doi.org/10.1034/j.1600-0501.1997.080407.x
  18. Norton MR. Assessment of cold welding properties of the internal conical interface of two commercially available implant systems. J Prosthet Dent 1999;81:159-66. https://doi.org/10.1016/S0022-3913(99)70243-X
  19. Sones AD. Complications with osseointegrated implants. J Prosthet Dent 1989;62:581-5. https://doi.org/10.1016/0022-3913(89)90084-X
  20. Kallus T, Bessing C. Loose gold screws frequently occur in fullarch fixed prostheses supported by osseointegrated implants after 5 years. Int J Oral Maxillofac Implants 1994;9:169-78.
  21. Haas R, Mensdorff-Pouilly N, Mailath G, Watzek G. Branemark single tooth implants: a preliminary report of 76 implants. J Prosthet Dent 1995;73:274-9. https://doi.org/10.1016/S0022-3913(05)80205-7
  22. Kim KT, Jo KH, Lee CH, Yu WJ, Lee KB. Cervical design effect of dental implant on stress distribution in crestal cortical bone studied by finite element analysis. J Korean Acad Prosthodont 2009;47:385-93. https://doi.org/10.4047/jkap.2009.47.4.385
  23. Boggan RS, Strong JT, Misch CE, Bidez MW. Influence of hex geometry and prosthetic table width on static and fatigue strength of dental implants. J Prosthet Dent 1999;82:436-40. https://doi.org/10.1016/S0022-3913(99)70030-2
  24. Merz BR, Hunenbart S, Belser UC. Mechanics of the implantabutment connection: an 8-degree taper compared to a butt joint connection. Int J Oral Maxillofac Implants 2000;15:519-26.
  25. Walton JN, MacEntee MI. A prospective study on the maintenance of implant prostheses in private practice. Int J Prosthodont 1997;10:453-8.
  26. Kim YL, Cho HW, Lee JB. Three dimensional finite element analysis of internally connected implant systems. J Korean Acad Prosthodont 2006:44:85-102.
  27. Geng JP, Tan KB, Liu GR. Application of finite element analysis in implant dentistry: a review of the literature. J Prosthet Dent 2001;85:585-98. https://doi.org/10.1067/mpr.2001.115251
  28. Weinstein AM, Klawitter JJ, Anand SC, Schuessler R. Stress analysis of porous rooted dental implants. J Dent Res 1976;55:772-7. https://doi.org/10.1177/00220345760550051001
  29. Ahn JK, Kay KS, Chung CH. Finite element stress analysis of implant prosthesis with internal connection between the implant and the abutment. J Korean Acad Prosthodont 2004;42:356-72.
  30. Richter EJ. In vivo vertical forces on implants. Int J Oral Maxillofac Implants 1995;10:99-108.
  31. Carlsson GE, Haraldson T. Functional response. In: Branemark PI. Zarb GA, Albrektsson T. (Eds) Tissue integrated prostheses. Osseointegration in clinical dentistry. 4th ed. Chicago; Quintessence; 1986. p. 74-8.
  32. Craig RG. Restorative Dental Materials. 6th ed. St. Louis; Mosby; 1980. p. 60-1.
  33. Lee HS, Kim MR, Park JM, Kim SJ. A 3-dimensional finite element analysis of tapered internal connection implant system (Avana SS III(R)) on different abutment connections. J Korean Acad Prosthodont 2010;48:181-8. https://doi.org/10.4047/jkap.2010.48.3.181
  34. Ban JH, Shin SW, Kim SJ, Lee JY. Three-dimensional finite element analysis on stress distribution of the mandibular implant- supported cantilever prostheses depending on the designs. J Korean Acad Prosthodont 2009;47:70-81. https://doi.org/10.4047/jkap.2009.47.1.70
  35. Rangert B, Jemt T, Jorneus L. Forces and moments on Branemark implants. Int J Oral Maxillofac Implants 1989;4:241-7.
  36. Rangert B, Krogh PH, Langer B, Van Roekel N. Bending overload and implant fracture: a retrospective clinical analysis. Int J Oral Maxillofac Implants 1995;10:326-34.
  37. Kwon JH, Choi MH, Kim YL, Cho HW. Three-dimensional finite element stress analysis of single implant restoration using different fixture and abutment screw diameters. J Korean Acad Prosthodont 2005;43:105-19.
  38. Yu SH, Park WH, Park JJ, Lee YS. A study on the various implant systems using the finite element stress analysis. J Korean Acad Prosthodont 2006;44:207-16.