대한치과보철학회지 (The Journal of Korean Academy of Prosthodontics)

  • 제46권3호
  • /
  • Pages.246-254
  • /
  • 2008
  • /
  • 0301-2875(pISSN)
  • /
  • 2005-3789(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
권호 표지

EFFECT OF CASTING PROCEDURE ON SCREW LOOSENING OF UCLA ABUTMENT IN TWO IMPLANT-ABUTMENT CONNECTION SYSTEMS

  • Ha, Chun-Yeo (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Kim, Chang-Whe (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Lim, Young-Jun (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Kim, Myung-Joo (Department of Prosthodontics, Graduate School, Seoul National University)
  • 발행 : 2008.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

STATEMENT OF PROBLEM: The cast abutment has advantages of overcoming angulation problem and esthetic problem. However, when a gold-machined UCLA abutment undergoes casting, the abutment surfaces in contact with the implant may change. PURPOSE: The purpose of this study was to compare the detorque values of prefabricated machined abutments with gold-premachined cast-on UCLA abutments before and after casting in two types of internal implant-abutment connection systems: (1) internal hexagonal joint, (2) internal octagonal joint. Furthermore, the detorque values of two implant-abutment connection systems were compared. MATERIALS AND METHODS: Twenty internal hexagonal implants with an 11-degree taper and twenty internal octagonal implants with an 8-degree taper were acquired. Ten prefabricated titanium abutments and ten gold-premachined UCLA abutments were used for each systems. Each abutment was torqued to 30 N㎝ according to the manufacturer's instructions and detorque value was recorded. The detorque values were measured once more, after casting with gold alloy for UCLA abutment, and preparation for titanium abutments. Group means were calculated and compared using independent t-test and paired t-test (${\alpha}$=0.05). RESULTS: The results were as follows: 1. The detorque values between titanium abutments and UCLA-type abutments showed significant differences in internal octagonal implants (P<0.05), not in internal hexagonal implants (P>0.05). 2. In comparison of internal hexagonal and octagonal implants, the detorque values of titanium abutments had significant differences between two connection systems on the initial analysis (P<0.05), not on the second analysis (P>0.05) and the detorque values of UCLA-type abutments were not significantly different between two connection systems (P>0.05). 3. The detorque values of titanium abutments and UCLA-type abutments decreased significantly on the second analysis than the initial analysis in internal hexagonal implants (P<0.05), not in internal octagonal implants (P>0.05). CONCLUSION: Casting procedures of UCLA-type abutments had no significant effect on screw loosening in internal implant-abutment connection systems, and UCLA-type abutments showed higher detorque values than titanium abutments in internal octagonal implants.

키워드

참고문헌

  1. Branemark PI, Hansson BO, Adell R, Breine U, Lindstrom J, Hallen O, Ohman A. Osseointegrated implants in the treatment of edentulous jaw. Experience from a 10-year period. Scand J Plastic Reconstr Surg Suppl 1977;16:1-132
  2. Adell R, Eriksson B, Lekholm U, Branemark PI, Jemt T. Long-term follow-up of osseointegrated implants in the treatment of totally edentulous jaws. Int J Oral Maxillofac Implants 1990;5:347-59
  3. Jemt T, Linden B, Lekholm U. Failures and complications in 127 consecutively placed fixed partial prostheses supported by Branemark implants: from prosthetic treatment to first annual checkup. Int J Oral Maxillofac Implants 1992;7:40-4
  4. Jemt T, Lekholm U, Grondahl K. 3-year follow up study of early single implant restorations ad modum Branemark. Int J Periodontics Restorative Dent 1990;10:340-9
  5. Scheller H, Urgell JP, Kultje C, Klineberg I, Goldberg PV, Stevenson-Moore P, Alonso JMN, Schaller M, Corria RM, Engquist B, Toreskog S, Kastenbaum F, Smith CR. A 5- year multicenter study on implant-supported single crown restorations. Int J Oral Maxillofac Implants 1998;13:212-8
  6. Jemt T, Pettersson P. A 3-year follow-up study on single implant treatment. J Dent 1993;21:203-8 https://doi.org/10.1016/0300-5712(93)90127-C
  7. McGlumphy EA, Mendel DA, Holloway JA. Implant screw mechanics. Dent Clin N Am 1998;42:71-89
  8. Lan LA, May KB, Wang RF. The effect of the use of a countertorque device on the abutment-implant complex. J Prosthet Dent 1999;81:411-7 https://doi.org/10.1016/S0022-3913(99)80007-9
  9. Lewis S, Beumer J, Hornburg W, Moy P. The 'UCLA' abutment. Int J Oral Maxillofac Implants 1988;3:183-9
  10. Lewis S, Avera S, Engleman M, Beumer J. The restoration of improperly inclined osseointegrated implants. Int J Oral Maxillofac Implants 1989;4:147-52
  11. Quirynen M, Bollen CM, Papaioannou W, Van Eldere J, van Steenberghe D. The influence of titanium abutment surface roughness on plaque accumulation and gingivitis: short-term observations. Int J Oral Maxillofac Implants 1996;11:169-78
  12. Burguete RL, Johns RB, King T et al. Tightening characteristics for screwed joints in osseointegrated dental implants. J Prosthet Dent 1994;71:592-9 https://doi.org/10.1016/0022-3913(94)90443-X
  13. Shigley JE, Mischke CR. Standard Handbook of Machine Design. New York: McGraw-Hill, 1986
  14. 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
  15. Merz BR, Hunenbart S, Belser UC. Mechanics of the implant- abutment connection: an 8-degree taper compared to a butt joint connection. Int J Oral Maxillofac Implants 2000;15:519-26
  16. Cehreli MC, Akca K, Iplikcioglu H, Sahin S. Dynamic fatigue resistance of implant abutment junction in an internally notched morse-taper oral implant: influence of abutment design. Clin Oral Impl Res 2004;15:459-65 https://doi.org/10.1111/j.1600-0501.2004.01023.x
  17. Tan KB, Nicholls JI. Implant-abutment screw joint preload of 7 hex-top abutment systems. Int J Oral Maxillofac Implants 2001;16:367-77
  18. Byrne D, Jacobs S, O'Connell B, Houston F, Claffey N. Preloads generated with repeated tightening in three types of screws used in dental implant assemblies. J Prosthodont 2006;15:164-71 https://doi.org/10.1111/j.1532-849X.2006.00096.x
  19. Kano SC, Binon P, Bonfante G, Curtis DA. Effect of casting procedures on screw loosening in UCLA-type abutments. J Prosthodont 2006;15:77-81 https://doi.org/10.1111/j.1532-849X.2006.00078.x
  20. Carr AB, Brantley WA. Characterization of noble metal implant cylinders: as-received cylinders and cast interfaces with noble metal alloys. J Prosthet Dent 1996;75:77-85 https://doi.org/10.1016/S0022-3913(96)90422-9
  21. Byrne D, Houston F, Cleary R, Claffey N. The fit of cast and premachined implant abutments. J Prosthet Dent 1998;80:184-92 https://doi.org/10.1016/S0022-3913(98)70108-8
  22. Vigolo P, Majzoub Z, Cordioli G. Measurement of the dimensions and abutment rotational freedom of gold-machined 3i UCLA-type abutments in the as-received condition, after casting with a noble metal alloy and porcelain firing. J Prosthet Dent 2000;84:548-53 https://doi.org/10.1067/mpr.2000.110497