The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

A STUDY OF SCREW LOOSENING AFTER DYNAMIC CONTINOUS FATIGUE TEST OF SEVERAL ABUTMENT SCREW

수종 임플랜트 지대주나사의 반복하중 후 나사풀림에 관한 연구

  • Kim Jin-Man (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Han Jung-Suk (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Lee Sun-Hyung (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Yang Jae-Ho (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Lee Jae-Bong (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Kim Yung-Soo (Department of Prosthodontics, College of Dentistry, Seoul National University)
  • 김진만 (서울대학교 치과대학 치과보철학교실) ;
  • 한중석 (서울대학교 치과대학 치과보철학교실) ;
  • 이선형 (서울대학교 치과대학 치과보철학교실) ;
  • 양재호 (서울대학교 치과대학 치과보철학교실) ;
  • 이재봉 (서울대학교 치과대학 치과보철학교실) ;
  • 김영수 (서울대학교 치과대학 치과보철학교실)
  • Published : 2003.08.01
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Abstract

Statement of problem : Chronic implant screw loosening remains a problem in restorative practices. Some implant manufactureres have introduced abutment screws with treated material, surfaces and macrostructures in an effort to reduce potential loosening. Purpose : This study evaluated the materials and loading cycles on detorque value after dynamic continous fatigue test in the sinulated conditions of posterior single restoration. Material and method : Fourteen of each of the following abutment screws - titanium alloy, gold alloy, gold-tite, and titanium alloy modified - were used in test. SEM is used to verify macrostructures of each screws. $ZrO_2/Al_2O_3$ composite abutment was tightened on $4{\times}10.0mm$ titanium external implant at 30 Ncm. Cyclic loading machine delivered dynamic loading forces between 20 and 320N for 100,000, 200,000, 300,000, 500,000, and 1,000,000 cycles at frequencies 14Hz. Torque and detorque value after loading was measured. Results : All measued screws had different screw length and thread form. Titanium modified screw had greater detorque value than others before and after cyclic loadings(p<0.05). All abutment screws had no significant change in mean percentage of detorque value after loading to initial value after less than 500.000 cyclic loadings, but significant lower value after 1,000,000 cycles(p<0.05). Conclusion : Within limintations of this study all abutment screws may be loosend after about 1 year use. Annual check-up is nessasary to prevent screw loosening.

Keywords

References

  1. Branemark PI. Osseointegration and its experimental background. J Prosthet Dent 1983;50:399-410 https://doi.org/10.1016/S0022-3913(83)80101-2
  2. Adell R, Lekholm U, Eriksson B, Branemarkk PI, Jemt T. A long term follow-up study of osseointegrated implants in the treatment of totally edentulous jaws. Int J Oral Maxillofac Implants 1990;5:347-59
  3. Binon PP. The effect of implant/abutment hexagonal misfit on screw joint stability. Int J Prosthodont 1996;9:149-60
  4. Jemt T. Failures and complications in 391 consecutively inserted fixed prostheses supported by Br${\aa}$nemark implants in edentulous jaws: A study of treatment from the time of prosthesis placement to the first annual checkup. Int J Oral Maxillofac Implants 1991;6:270-276
  5. Jemt T. Failures and complications in 391 consecutively inserted fixed prostheses supported by Br${\aa}$nemark implants. Int J Oral Maxillofac Implants 1992;7:513-22
  6. Jemt T, Linden B, Lekholm U. Failures and complication in 127 consecutively placed fixed partial prostheses supported by Br${\aa}$nemark implants: From prosthetic treatment to first annual check up. Int J Oral Maxillofac Implants 1992;7:40-3
  7. Zarb G, Schmitt A. The longitudinal clinical effectiveness of osseointegrated implants : the Toronto study, part III. Problems and complications encountered. J Prosthet Dent 1990;64:185-194 https://doi.org/10.1016/0022-3913(90)90177-E
  8. Lekholm U, Steenberghe D, Herrmann I. Osseointegrated implants in the treatment of partially edentulous jaws: a prospective five-year multicenter study. Int J Oral Maxillofac Implants 1994;9:627-635
  9. Becker W, Becker B. Replacement of maxillary and mandibular molars with single endosseous implant restoration: a retrospective study. J Prosthet Dent 1995;74:51-55 https://doi.org/10.1016/S0022-3913(05)80229-X
  10. Misch CE. Contemporary Implant Dentistry. Mosby-Year Book, Inc.., St. Louiss 1993;669-83
  11. Bickford JH. An introduction to the design and behavior of bolted joints. New York: Marcel Dekker, Inc, 1981
  12. Burguete RI, Johns RB, KingT, Patterson EA. Tightening characteristics for screw joints in osseointegrated dental implants. J Prosthet Dent 1994:71:592-599
  13. McGlumphy EA, Mendel DA, Holloway JA. Implant screw mechanics. Dent Clin North Am 1998;42:71-89
  14. Korioth TW, Cardoso AC, Versluis A. Effect of washers on reverse torque displacement of dental implant gold retaining screws. J Prosthet Dent. 1999 ;82:312-6 https://doi.org/10.1016/S0022-3913(99)70086-7
  15. Haack JE, Sakaguchi RL, Sun T, Coffey JP. Elongation and preload stress in dental implant abutment screws. Int J Oral Maxillofac Implants 1995;10:529-36
  16. Martin WC, Woody RD, Miller BH. Miller AW. Implant abutment screw rotations and preloads for four different screw materials and surfaces. J Prosthet Dent 2001 ;86:24-32 https://doi.org/10.1067/mpr.2001.116230
  17. Cibirka RM, Nelson SK, Lang BR, Rueggeberg FA. Examination of the implant-abutment interface after fatigue testing. J Prosthet Dent. 2001;85:268-75 https://doi.org/10.1067/mpr.2001.114266
  18. ISO/DIS 14801 Dental implants - Dynamic continuous fatigue test, International Organization for Standardization, 2001
  19. Kim DJ, Lee MH, Lee DY, Han JS. Mechanical properties, phase stability, and biocampatibility of (Y, Nb)-TZP/$Al_2O_3$ composite abutments for dental implant. J Biomed Mater Res 2000;53:438-43 https://doi.org/10.1002/1097-4636(2000)53:4<438::AID-JBM19>3.0.CO;2-3
  20. Standlee JP, Caputo AA, Chwu MJ, Sun TI'. Accuracy of mechanical torque-limiting devices for implants. Int J Oral Maxillofac Implants 2002;17:220-224
  21. Standlee JP, Caputo AA. Accuracy of an electric torque-limiting device for implants. Int J Oral Maxillofac Implants 1999;14:278-81
  22. Mitrani R, Nicholls JI, Phillips KM, Ma T. Accuracy of electric implant torque controllers following time in clinical service. Int J Oral Maxillofac Implants 2001;16:394-399
  23. Gollen KL, Vermilyea SG, Vossought J, Agar JR. Torque generated using hand held screwdrivers and torque drivers for osseointegrated implants. Proceedings of the Eight Annual Meeting of the Acedemy of Osseointegration. San Diego, CA, 1993. p.103-4
  24. Gutierrez J, Nicholls JI, Libman WJ, Butson TJ. Accuracy of the implant torque wrench following time in clinical service. Int J Prosthodont 1997;10:562-7
  25. Gibb CH, Mahan PE, Mauderli A, Lundeen HC, Walsh EK, Limits of human bite strength. J Prosthet Dent 1986;56:226-9