Three-dimensional optimization and sensitivity analysis of dental implant thread parameters using finite element analysis

• Published in: Journal of the Korean Association of Oral and Maxillofacial Surgeons Vol. 44; no. 2; pp. 59 - 65
• Main Authors: Geramizadeh, Maryam, Katoozian, Hamidreza, Amid, Reza, Kadkhodazadeh, Mahdi
• Format: Journal Article
• Language: English
• Published: Korea (South) The Korean Association of Oral and Maxillofacial Surgeons 01.04.2018; 대한구강악안면외과학회
• Subjects: Original; 치의학; Biomechanics; Thread design; Dental implants; Optimization; Finite element
• ISSN: 2234-7550; 2234-5930
• DOI: 10.5125/jkaoms.2018.44.2.59

This study aimed to optimize the thread depth and pitch of a recently designed dental implant to provide uniform stress distribution by means of a response surface optimization method available in finite element (FE) software. The sensitivity of simulation to different mechanical parameters was also evaluated. A three-dimensional model of a tapered dental implant with micro-threads in the upper area and V-shaped threads in the rest of the body was modeled and analyzed using finite element analysis (FEA). An axial load of 100 N was applied to the top of the implants. The model was optimized for thread depth and pitch to determine the optimal stress distribution. In this analysis, micro-threads had 0.25 to 0.3 mm depth and 0.27 to 0.33 mm pitch, and V-shaped threads had 0.405 to 0.495 mm depth and 0.66 to 0.8 mm pitch. The optimized depth and pitch were 0.307 and 0.286 mm for micro-threads and 0.405 and 0.808 mm for V-shaped threads, respectively. In this design, the most effective parameters on stress distribution were the depth and pitch of the micro-threads based on sensitivity analysis results. Based on the results of this study, the optimal implant design has micro-threads with 0.307 and 0.286 mm depth and pitch, respectively, in the upper area and V-shaped threads with 0.405 and 0.808 mm depth and pitch in the rest of the body. These results indicate that micro-thread parameters have a greater effect on stress and strain values.