Angulated Dental Implants in Posterior Maxilla FEA and Experimental Verification
AIM: This study aimed to evaluate the effect of different implant angulations in posterior maxilla on stress distribution by finite element analysis and verify its results experimentally.
METHODS: Two simplified models were prepared for an implant placed vertically and tilted 25Â° piercing the maxillary sinus. Geometric models' components were prepared by Autodesk Inventor then assembled in ANSYS for finite element analysis. The results of finite element analysis were verified against experimental trials results which were statistically analysed using student t-test (level of significance p < 0.05).
RESULTS: Implant - abutment complex absorbed the load energy in case of vertical implant better than the case of angulated one. That was reflected on cortical bone stress, while both cases showed stress levels within the physiological limits. Comparing results between FEA and experiment trials showed full agreement.
CONCLUSION: It was found that the tilted implant by 25Â° can be utilised in the posterior region maxilla for replacing maxillary first molar avoiding sinus penetration. The implant-bone interface and peri-implant bones received the highest Von Mises stress. Implant - bone interface with angulated implant received about 66% more stresses than the straight one.
Plum Analytics Artifact Widget Block
Misch CE. Rationale for dental implants. In: Misch CE. (ed). Contemporary Implant Dentistry. 2nd ed, Rudolph P: St. Louis, 1999: 3-12.
Ayranci F, Gungormus M, Omezli MM, Gundogdu B. The Effect of Alendronate on Various Graft Materials Used in Maxillary Sinus Augmentation: A Rabbit Study. Iran Red Crescent Med J. 2015; 17(12):e33569. https://doi.org/10.5812/ircmj.33569 PMid:26756022 PMCid:PMC4706848
Asawa N, Bulbule N, Kakade D, Shah R. Angulated implants: an alternative to bone augmentation and sinus lift procedure: a systematic review. J Clin Diagn Res. 2015; 9(3):Ze10-3. https://doi.org/10.7860/JCDR/2015/11368.5655
Barbier L, Vander Sloten J, Krzesinski G, Schepers E, Van der Perre G. Finite element analysis of non-axial versus axial loading of oral implants in the mandible of the dog. J Oral Rehabil. 1998; 25(11):847-58. https://doi.org/10.1046/j.1365-2842.1998.00318.x PMid:9846905
Lu YJ, Chang SH, Ye JT, Ye YS, Yu YS. Finite Element Analysis of Bone Stress around Micro-Implants of Different Diameters and Lengths with Application of a Single or Composite Torque Force. PLoS One. 2015; 10(12):e0144744. https://doi.org/10.1371/journal.pone.0144744 PMid:26659581 PMCid:PMC4682797
Geng JP, Tan KB, Liu GR. Application of finite element analysis in implant dentistry: a review of the literature. J Prosthet Dent. 2001; 85(6):585-98. https://doi.org/10.1067/mpr.2001.115251 PMid:11404759
El-Anwar MI. Simple technique to build complex 3D solid models. Proceeding of 19th international conference on computer Theory and Applications (ICCTA 2009), 17-19 Sept, Alexandria, Egypt; 2009.
Kohnke P. ANSYS Theory Reference Manual, Ansys Inc., Canonsburg, PA, USA, 2013.
El-Anwar MI AL-Azrag KE, Ghazy MH, Dawood LE. Influence of implant-abutment angulations and crown material on stress distribution on central incisor: a 3D FEA. Braz J Oral Sci. 2015; 14(4):323-329. https://doi.org/10.1590/1677-3225v14n4a13
AL-Azrag KE. Influence of implant abutment angulations on fracture resistance and stress analysis of different all-ceramic restoration [master's thesis]. Mansoura: Faculty of Dentistry, University of Mansoura, Egypt, 2015.
Kim SH, Kim SJ, Lee KW, Han DH. The effects of local factors on the survival of dental implants: A 19 year retrospective study. J Korean Acad Prosthodont. 2010; 48:28â€“40. https://doi.org/10.4047/jkap.2010.48.1.28
Maminskas J, Puisys A, Kuoppala R, Raustia A, Juodzbalys G. The Prosthetic Influence and Biomechanics on Peri-Implant Strain: a Systematic Literature Review of Finite Element Studies. J Oral Maxillofac Res. 2016; 7(3):e4. https://doi.org/10.5037/jomr.2016.7304 PMid:27833729 PMCid:PMC5100644
AL-Azrag KI, Ghazy MH, El-Anwar MI, Dawood L. Influence of implant abutment angulations on fracture resistance and stress analysis of different all-ceramic restoration. Mansoura J Dent. 2014; 1:94-9.
El-Anwar MI, El-Zawahry MM, El-Mofty MS. Load transfer on dental implants and surrounding bones. Aust J Basic Appl Sci. 2012; 6: 551-60.
Bolukbasi N, Yeniyol S. Number and localization of the implants for the fixed prosthetic reconstructions: on the strain in the anterior maxillary region. Med Eng Phys. 2015; 37(4):431-45. https://doi.org/10.1016/j.medengphy.2015.02.004 PMid:25765190
Xu Yan, Xinwen Zhang, Weichao Chi, Hongjun Ai, Lin Wu. Association between implant apex and sinus floor in posterior maxilla dental implantation: A three dimensional finite element analysis. Exp Ther Med. 2015; 9(3): 868â€“876. https://doi.org/10.3892/etm.2015.2205 PMid:25667644 PMCid:PMC4316907
Bidez MW, Misch CE. Force transfer in implant dentistry: Basic concepts and principles. J Oral Implantol. 1992; 18: 264-74. PMid:1289562
All rights reserved.