Background/Aim: A factor affecting the success rate of dental implants, which has been used successfully for many years, is the implant-abutment connection system. The purpose of this study was to evaluate the stress distribution of different implant-abutment connection systems under different forces.
Material and Methods: This in vitro study included a finite element analysis. In the study, the cylindrical and screwed dental implants available in 3 different diameters from 4 different companies were categorized into 12 different models. Two different scenarios of force application were conducted on each model in this study. In the first scenario, 100 N force and 100 N moment were applied in a vertical direction onto a point considered as the center of each tooth. In the second scenario, a 100 N force and moment were applied at a 45° angle in an oblique direction.
Results: As a result of the forces applied to dental implants of different diameters from different companies, octagon implant-abutment connection systems had less stress accumulation than hexagon implant-abutment connection systems. In addition, when stress accumulation ratios were evaluated according to the diameter of the implants used, it was observed that 3 mm diameter implants accumulated more stress in bone than 4 mm diameter implants; there was no significant difference between 4 mm diameter implants and 5 mm diameter implants.
Conclusions: Implant-abutment connection system is important for the longevity of implants under the forces. Therefore, this factor should be considered during implant selection.
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1. Adell R Eriksson B Lekholm U Branemark PI Jemt T. Long-term follow up study of osseointegrated implants in the treatment of totally edentulous jaws. Int J Oral Maxillofac Implants 1990;5:347-359.
2. Kwon JH Han CH Kim SJ Chang JS. The change of rotational freedom following different insertion torques in three implant systems with implant driver. J Adv Prosthodont 2009;1:37-40.
3. Finger IM Castellon P Block M Elian N. The evolution of external and internal implant/abutment connections. Pract Proced Aesthet Dent 2003;15:625-632.
4. Marcián P Wolff J Horáčková L Kaiser J Zikmund T Borák L. Micro finite element analysis of dental implants under different loading conditions. Comput Biol Med 2018;96:157-165.
5. Matsushita Y Kitoh M Mizuta K Ikeda H Suetsugu T. Two-dimensional FEM analysis of hydroxyapatite implants: diameter effects on stress distribution. J Oral Implantol 1990;16:6-11.
6. Peyton FA Craig RG. Current evaluation of plastics in crown and bridge prosthesis. J Prosthet Dent 1963;13:743-753.
7. Branemark PI Breine U Adell R Hansson BO Lindström J Olsson A. Intraosseous anchorage of dental prostheses. I. Experimental studies. Scand J Plast Recons Surg 1969;3:81-100.
8. Branemark PI Hansson BO Adell R Breine U Lindström J Hallen O Ohman A. Osseointegrated implants in the treatment of the edentulous jaw. Experience from a 10-year period. Scand J Plast Reconstr Surg 1977;16:1-132.
9. Branemark PI Zarb GA Albrektson T. Tissue-integrated prostheses: Osseointegration in clinical dentistry. Chicago: Quintessence 1985;54:611-612.
10. Zarb GA Albrektson T. Osseointegration: A requiem for the periodontal ligament. Int J Periodontal Rest Dent 1991;11:88-91.
11. Akça K Çehreli MC İplikçioğlu H. A comparison of three-dimensional finite element stress analysis with in vitro strain gauge measurements on dental implants. Int J Prosthodont 2002;15:115-121.
12. Akça K İplikçioğlu H. Finite element stress analysis of the influence of staggered versus straight placement of dental implants. Int J Oral Maxillofac Implants 2001;16:722-730.
13. O’Mahony AM Williams JL Katz JQ Spencer P. Anisotropic elastic properties of cancellous bone from a human edentulous mandible. Clin Oral Implant Res 2000;11:415-421.
14. Bidez WM Misch CE. Issues in bone mechanics related to oral implants. Implant Dent 1992;1:289-294.
15. Van Zyl PP Grundling NL Jooste CH Terblanche E. Three dimensional finite element model of a human mandible incorporating six osseointegrated implants for stress analysis of mandibular cantilever prosthesis. Int J Oral Maxillofac Implants 1995;10:51-57.
16. Perriard J Wiskott WA Mellal A Scherrer SS Botsis J Belser UC. Fatigue resistance of ITI implant-abutment connectors. A comparison of the standard cone with a novel internally keyed design. Clin Oral Implants Res 2002;13:542-549.
17. Balik A Karatas MO Keskin H. Effects of different abutment connection designs on the stress distribution around five different implants: a 3-dimensional finite element analysis. J Oral Implantol 2012;38:491-496.
18. Raoofi S Khademi M Amid R Kadkhodazadeh M Movahhedi MR. Comparison of the effect of three abutment-implant connections on stress distribution at the internal surface of dental implants: a finite element analysis. J Dent Res Dent Clin Dent Prospect 2013;7:132-139.