Three-dimensional finite element analysis of the influence of different implant-abutment joint design on abutment and abutment screw stress

doi:10.19439/j.sjos.2021.05.007

Abstract

Abstract: PURPOSE: This experiment studied the influence of different connection designs of the tapered retention and platform transfer implant on the stress of the abutments and abutment screws. METHODS: Implant models (Platform-switching: 0.2, 0.4, 0.6, 0.8, 1.0 mm; Taper:6°,8°,10°) were established, and Von-mises stress and strain of abutment and abutment screw under different loads were analyzed. RESULTS: With the increase of the platform-switching amount, the peak von-Mises stress and strain of abutment and abutment screw increased. The peak von-Mises stress of the model with platform transfer≥0.8 mm was higher than 690 MPa. In addition, the variation amplitude was horizontal loading>oblique loading>vertical loading. The maximum stress of the abutment was concentrated at the neck of the abutment in 81.67% models. The stress of the abutment screw was concentrated at the turning point of the head and body of abutment screw in all models. CONCLUSIONS: The increase of the amount of platform switching makes the abutment and the abutment screws bear more force in the occlusion process. Therefore, in order to reduce the occurrence of mechanical complications after implantation and restoration, the implant system with the minimum amount of platform transfer should be selected within a certain range. The maximum stress on the abutments and screws exceeds the yield strength of pure titanium in implants with platform-switching amount greater than 0.8 mm, indicating that this design should be selected prudently in clinical practice.

Key words: Platform switching, Taper, Abutment, Implant, Finite element analysis

CLC Number:

R783.1

GAO Yuan, CHEN Jie, WANG Gao-qi, LI Yun-kai, BIAN Cui-rong. Three-dimensional finite element analysis of the influence of different implant-abutment joint design on abutment and abutment screw stress[J]. Shanghai Journal of Stomatology, 2021, 30(5): 481-487.

References

[1] Hämmerle CHF, Tarnow D.The etiology of hard- and soft-tissue deficiencies at dental implants: a narrative review[J]. J Clin Periodontol, 2018, 89(Suppl 1): S267-S277.
[2] Schmitt CM, Nogueira-Filho G, Tenenbaum HC, et al.Performance of conical abutment (Morse Taper) connection implants: a systematic review[J]. J Biomed Mater Res A, 2014, 102(2): 552-574.
[3] Wang K, Geng J, Jones D, et al.Comparison of the fracture resistance of dental implants with different abutment taper angles[J]. Mater Sci Eng C Mater Biol Appl, 2016, 63: 164-171.
[4] Lazzara RJ, Porter SS.Platform switching: a new concept in implant dentistry for controlling postrestorativecrestal bone level[J]. Int J Periodontics Restorative Dent, 2006, 26(1): 9-17.
[5] Se-Young M, Young-Jun L, Myung-Joo K, et al.Three-dimensional finite element analysis of platform switched implant[J]. J Adv Prosthodont, 2017, 9(1): 31-37.
[6] Macedo JP, Pereira J, Vahey BR, et al.Morse taper dental implants and platform switching: The new paradigm in oral implantology[J]. Eur J Dent, 2016, 10(1): 148-154.
[7] Akça K, Cehreli MC, Iplikçioglu H.Evaluation of the mechanical characteristics of the implant-abutment complex of a reduced diameter morse-taper implant. a nonlinear finite element stress analysis[J]. Clin Oral Implants Res, 2010, 14(4): 444-454.
[8] Wu AY, Lung H, Huang HL, et al.Biomechanical investigations of the expanded platform-switching concept in immediately loaded small diameter implants[J]. J Prosthet Dent, 2016, 115(1): 20-25.
[9] Seetoh YL, Tan KB, Chua EK, et al.Load fatigue performance of conical implant-abutment connections[J]. Int J Oral Maxillofac Implants, 2011, 26(4): 797-806.
[10] 郭智舜, 郭平川. Ankylos种植系统基台机械性并发症的原因及处理方法[J]. 天津医药, 2011, 40(9): 946-947.
[11] 陈宇寰, 张智勇, 张晓, 等. 平台转换种植体基台折断病例回顾性分析[J]. 口腔医学研究, 2016, 32(10): 1092-1095.
[12] Schrotenboer J, Tsao YP, Kinariwala V, et al.Effect of microthreads and platform switching on crestal bone stress levels: a finite element analysis[J]. J Periodontol, 2008, 79(11): 2166-2172.
[13] Canullo L, Fedele GR, Iannello G, et al.Platform switching and marginal bone-level alterations: the results of a randomized-controlled trial[J]. Clin Oral Implants Res, 2010, 21(1): 115-121.
[14] Chu CM, Huang HL, Hsu JT, et al.Influences of internal tapered abutment designs on bone stresses around a dental implant: three-dimensional finite element method with statistical evaluation[J]. J Periodontol, 2012, 83(1): 111-118.
[15] Liu Y, Gao S, Han Y, et al.Bearing capacity of ceramic crowns before and after cyclic loading: an in vitro study[J]. J Mech Behav Biomed Mater, 2018, 87: 197-204.
[16] Elias CN, Fernandes DJ, Resende CR, et al.Mechanical properties, surface morphology and stability of a modified commercially pure high strength titanium alloy for dental implants[J]. Dent Mater, 2015, 31(2): e1-e13.
[17] Tsouknidas A, Lympoudi E, Michalakis K, et al.Influence of alveolar bone loss and different alloys on the biomechanical behavior of internal-and external-connection implants: a three-dimensional finite element analysis[J]. Int J Oral Maxillofac Implants, 2015, 30(3): e30-e42.
[18] Prados-Privado M, Gehrke SA, Rojo R, et al.Complete mechanical characterization of an external hexagonal implant connection: in vitro study, 3D FEM, and probabilistic fatigue[J]. Med Biol Eng Comput, 2018, 56(12): 2233-2244.
[19] D'souza KM, Aras MA. Three-dimensional finite element analysis of the stress distribution pattern in a mandibular first molar tooth restored with five different restorative materials[J]. J Indian Prosthodont Soc, 2017, 17(1): 53-60.
[20] Liu H, Qin L, Wu Y, et al.Oral physiological characteristics among Chinese subjects in the eastern region of China[J]. Arch Oral Biol, 2019, 108: 104539.
[21] Canay S, Akça K.Biomechanical aspects of bone-level diameter shifting at implant-abutment interface[J]. Implant Dent, 2009, 18(3): 239-248.
[22] Bozkaya D, Müftü S.Mechanics of the taper integrated screwed-in (TIS) abutments used in dental implants[J]. J Biomech, 2005, 38(1): 87-97.