Influence of Crown-to-Implant Ratio on Stress Concentration of Fixed Dental Prosthesis in Shortened Dental Arch Concept
Faculty of Dentistry, Ankara University, Turkey
- *Corresponding Author:
- Hamiyet güngör
Faculty of Dentistry
Ankara University, Turkey
Tel: (0312) 212 60 40
E-mail: [email protected]
Received Date: October 20, 2015; Accepted Date: November 21, 2016; Published Date: November 28, 2016
Citation: Güngör H (2016) Influence of Crown-to-Implant Ratio on Stress Concentration of Fixed Dental Prosthesis in Shortened Dental Arch Concept. Dent Implants Dentures 1:112. doi:10.4172/2572-4835.1000112
Copyright: © 2016 Güngör H. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Purpose: The aim of this study was to evaluate the effect of crown-to-implant (C/I) ratio on the stress distributions in bone and implant under axial and oblique loads by using three-dimensional (3-D) finite element analysis (FEA) method in case of surgical procedures couldn’t be applied especially to the geriatric patients. Material and methods: Three maxillary bone models were created using with FEA methods. 4.1 x 10 mm ITI dental implants were embedded in first premolar site and one implant supported two-unit fixed dental prostheses were modeled. Shortened dental arch (SDA) concept was also modeled as a treatment option by means of implant supported fixed dental prosthesis. Three different (C/I) ratios (1/1, 1.5/1, and 2/1) were modeled in this study with a 6 mm cantilever extension. 300 N axial and oblique loads were applied to the all fixed dental prosthesis. The highest stress values were recorded and evaluated both in bone and implant. Results: The determined highest stress in cortical bone was -73.6 MPa under axial loads and -142.4 MPa under oblique loads for 2/1 C/I ratios. The highest von Mises stress value in implant was 312.7 MPa under axial load and 451.1 MPa under oblique load for the highest C/I ratio. With the increasing C/I ratio, stresses were increased both in bone and implant structure. Conclusion: Within the limitations of this FEA study, increasing C/I ratio increases the stress distribution in bone and implant. One implant supported two-unit cantilever fixed dental prosthesis may be one of the alternative treatment choices for the geriatric patients but this FEA study should be supported with the clinical studies.