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VOLUME 23 , ISSUE 8 ( August, 2022 ) > List of Articles

ORIGINAL RESEARCH

In Vitro Comparison of Loss of Torque between Gold and Titanium Alloy Abutment Screws in Dental Implants without Any Cyclic Loads

Nithyapriya Selvamani, Ramesh Ardhanari Shanmugasundaram, Anand Selvaraj, Gayathri Ranganathan

Keywords : Loss of torque, Preload loss, Screw loosening

Citation Information : Selvamani N, Shanmugasundaram RA, Selvaraj A, Ranganathan G. In Vitro Comparison of Loss of Torque between Gold and Titanium Alloy Abutment Screws in Dental Implants without Any Cyclic Loads. J Contemp Dent Pract 2022; 23 (8):801-806.

DOI: 10.5005/jp-journals-10024-3388

License: CC BY-NC 4.0

Published Online: 29-11-2022

Copyright Statement:  Copyright © 2022; The Author(s).


Abstract

Aim: To find and compare the amount of screw loosening in gold and titanium alloy abutment screws without any cyclic load, this study was performed. Materials and methods: A total of 20 implant fixture screw samples with 10 gold abutment screws from Osstem and 10 titanium alloy abutment screws from Genesis. Implant fixtures were placed into the acrylic resin using a surveyor to maintain the same path of insertion. Using a hex driver and calibrated torque wrench, initial torque was given according to the manufacturer’s recommendation. One vertical and other horizontal lines were drawn over the head of the hex driver and resin block. Acrylic block position was standardized using a putty index in a fixed table and using a tripod stand a digital single-lens reflex camera (DSLR) camera was positioned with its horizontal arm facing the floor, as well as perpendicular to the acrylic box. Photographs were taken immediately after the application of the initial torque given as per the manufacturer’s recommendation and 10 minutes after the initial torque. Re-torque of 30 and 35 N cm was given to gold and titanium alloy abutment screws respectively. Photographs were taken again in that same position immediately after re-torquing and 3 hours after re-torquing. The photographs were uploaded into the Fiji-win64 analysis software and the angulations were measured in each photograph. Results: Both the gold and titanium alloy abutment screws exhibited screw loosening after initial torquing. There was a significant difference in the amount of screw loosening between gold and titanium alloy abutment screws after initial torquing and no change in the abutment screw position after three hours of re-torquing. Conclusion: Re-torquing of both gold and titanium alloy abutment screws after 10 minutes of initial torquing should be performed routinely for retaining the preload and minimizing the screw loosening even before loading the implant fixture. Clinical significance: Gold abutment screws may have the ability to retain the preload better than the titanium alloy abutment screws after initial torquing, re-torquing may be necessary after 10 minutes to reduce the settling effect in a routine clinical procedure.


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  1. Siamos G, Winkler S, Boberick KG. Relationship between implant preload and screw loosening on implant-supported prostheses. J Oral Implantol 2002;28(2):67–73. DOI: 10.1563/ 1548-1336(2002)028<0067:TRBIPA>2.3.CO;2.
  2. Goheen KL, Vermilyea SG, Vossoughi J, et al. Torque generated by handheld screwdrivers and mechanical torquing devices for osseointegrated implants. Int J Oral Maxillofac Implants 19941;9(2):149–155. PMID: 8206549.
  3. Kazemi M, Rohanian A, Monzavi A, et al. Evaluation of the accuracy and related factors of the mechanical torque-limiting device for dental implants. J Dentistry (Tehran). 2013;10(2):112–118. PMID: 23724209.
  4. Barbosa GS, Silva–Neto JP, Simamoto–Júnior PC, et al. Evaluation of screw loosening on new abutment screws and after successive tightening. Brazilian Dent J 2011;22(1):51–55. DOI: 10.1590/s0103-64402011000100009.
  5. Al-Otaibi HN, Almutairi A, Al Farraj J, et al. Effect of torque application technique on screw preload of implant-supported prostheses. Int J Oral Maxillofac Implants 2017;32(2):259–263. DOI: 10.11607/jomi.4773.
  6. Nithyapriya S, Ramesh AS, Kirubakaran A, et al. Systematic analysis of factors that cause loss of preload in dental implants. J Indian Prosthodont Soc 2018;18(3):189–195. DOI: 10.4103/jips.jips_294_17.
  7. Doolabh R, Dullabh HD, Sykes LM. A comparison of preload values in gold and titanium dental implant retaining screws. SADJ 2014;69(7): 316–320. PMID: 26548212.
  8. Tsuge T, Hagiwara Y. Influence of lateral–oblique cyclic loading on abutment screw loosening of internal and external hexagon implants. Dental Mater J 2009;28(4):373–381. DOI: 10.4012/dmj.28.373.
  9. Tzenakis GK, Nagy WW, Fournelle RA, et al. The effect of repeated torque and salivary contamination on the preload of slotted gold implant prosthetic screws. J Prosthet Dent 2002;88(2):183–191. DOI: 10.1067/mpr.2002.127604.
  10. Winkler S, Ring K, Ring JD, et al. Implant screw mechanics and the settling effect: an overview. J Oral Implantol 2003;29(5):242–245. DOI: 10.1563/1548-1336(2003)029<0242:ISMATS>2.3.CO;2.
  11. Khraisat A, Hashimoto A, Nomura S, et al. Effect of lateral cyclic loading on abutment screw loosening of an external hexagon implant system. J Prosthet Dent 2004;91(4):326–334. DOI: 10.1016/j.prosdent.2004.01.001.
  12. Kitagawa T, Tanimoto Y, Odaki M, et al. Influence of implant/abutment joint designs on abutment screw loosening in a dental implant system. J Biomed Mater Res B Appl Biomater 2005;75(2):457–463. DOI: 10.1002/jbm.b.30328.
  13. Piermatti J, Yousef H, Luke A, et al. An in vitro analysis of implant screw torque loss with external hex and internal connection implant systems. Implant Dent 2006;15(4):427–435. DOI: 10.1097/01.id.0000245440.09464.48.
  14. Wuo AD. Measurement of the loosening torque of the prosthetic component in a morse-taper connection in dental implants using carbon deposition on the friction surface. Doctoral dissertation, University of São Paulo, Brazil. (In Portuguese).
  15. Al Jabbari Y, Fournelle R, Ziebert G, et al. Mechanical behavior and failure analysis of prosthetic retaining screws after long-term use in vivo. Part 2: Metallurgical and Microhardness Analysis. J Prosthodont 2008;17(3):181–191. DOI: 10.1111/j.1532-849X.2007.00265.x.
  16. Park JK, Choi JU, Jeon YC, et al. Effects of abutment screw coating on implant preload. J Prosthodont 2010;19(6):458–464. DOI: 10.1111/j.1532- 849X.2010.00595.x.
  17. Kim KS, Lim YJ, Kim MJ, et al. Variation in the total lengths of abutment/implant assemblies generated with a function of applied tightening torque in external and internal implant–abutment connection. Clin Oral Implants Res 2011;22(8):834–839. DOI: 10.1111/j.1600-0501. 2010.02063.x.
  18. Guda T, Ross TA, Lang LA, et al. Probabilistic analysis of preload in the abutment screw of a dental implant complex. The Journal of prosthetic dentistry. 2008;100(3):183–193.
  19. Guzaitis KL, Knoernschild KL, Viana MAG. Effect of repeated screw joint closing and opening cycles on implant prosthetic screw reverse torque and implant and screw thread morphology. J Prosthet Dentist 2011;106(3):159–169. DOI: 10.1016/S0022-3913(11)60115-7.
  20. Ferreira MB, Delben JA, Barao VA, et al. Evaluation of torque maintenance of abutment and cylinder screws with Morse taper implants. J Craniofac Surg 2012;23(6):e631–e634. DOI: 10.1097/SCS. 0b013e318270fe0e.
  21. Butignon LE, de Basílio MDA, Pereira RDP, et al. Influence of three types of abutments on preload values before and after cyclic loading with structural analysis by scanning electron microscopy. Int J Oral Maxillofac Implants 2013;28(3):e161–e170. DOI: 10.11607/jomi.2481.
  22. Bernardes SR, de Mattos MDGC, Hobkirk J, et al. Loss of preload in screwed implant joints as a function of time and tightening/untightening sequences. Int J Oral Maxillofac Implants 2014;29(1):89–96. DOI: 10.11607/jomi.3344.
  23. Siadat H, Pirmoazen S, Beyabanaki E, et al. Does abutment collar length affect abutment screw loosening after cyclic loading? J Oral Implantol 2015;41(S1):346–351. DOI: 10.1563/AAID-JOI-D-D-14-00021.
  24. Jörn D, Kohorst P, Besdo S, et al. Influence of lubricant on screw preload and stresses in a finite element model for a dental implant. J Prosthetic Dentist 2014;112(2):340–348. DOI: 10.1016/j.prosdent. 2013.10.016.
  25. Sakaguchi RL, Borgersen SE. Nonlinear contact analysis of preload in dental implant screws. Int J Oral Maxillofac Implants 1995;10(3):295–302. PMID: 7615325.
  26. Sones AD. Complications with osseointegrated implants. J Prosthetic Dent 1989;62(5):581–585. DOI: 10.1016/0022-3913(89)90084-x.
  27. Shin HM, Huh JB, Yun MJ, et al. Influence of the implant–abutment connection design and diameter on the screw joint stability. J Adv Prosthodont 2014;6(2):126–132. DOI: 10.4047/jap.2014.6.2.126.
  28. Jo JY, Yang DS, Huh JB, et al. Influence of abutment materials on the implant–abutment joint stability in internal conical connection type implant systems. J Adv Prosthodont 2014;6(6):491–497. DOI: 10.4047/jap.2014.6.6.491.
  29. Al-Sahan MM, Al Muflehi NS, Akeel RF. The influence of tightening sequence and method on screw preload in implant superstructures. Int J Prosthodont 2014;27(1):76–79. DOI: 10.11607/ijp.3306.
  30. Yilmaz B, Gilbert AB, Seidt JD, et al. Displacement of implant abutments following initial and repeated torqueing. Int J Oral Maxillofac Implants 2015;30(5):1011–1018. DOI: 10.11607/jomi.3694.
  31. Bulaqi HA, Mashhadi MM, Geramipanah F, et al. Effect of the coefficient of friction and tightening speed on the preload induced at the dental implant complex with the finite element method. J Prosthet Dent 2015;113(5):405–411. DOI: 10.1016/j.prosdent.2014.09.021.
  32. Bacchi A, Reglan A, Bhering CL, et al. Loosening torque of universal abutment screws after cyclic loading: Influence of tightening technique and screw coating. J Adv Prosthodont 2015;7(5):375–379. DOI: 10.4047/jap.2015.7.5.375.
  33. Kose OD, Karataslı B, Demircan S, et al. In vitro evaluation of manual torque values applied to implant–abutment complex by different clinicians and abutment screw loosening. Biomed Res Int 2017;2017:2017:7376261. DOI: 10.1155/2017/7376261.
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