Improving the fatigue life of produced dental implants by the thread-rolling process

Serkan Aktas; Yasin Kisioglu

doi:10.1515/mt-2021-2159

Article

Improving the fatigue life of produced dental implants by the thread-rolling process

Serkan Aktas
Serkan Aktas, born in 1981, received his PhD in the Biomedical Engineering Department at Kocaeli University, Kocaeli, Turkey, in 2021. He has been working as a Lecturer at the Uzunciftlik Nuh Cimento Vocational High School at Kocaeli University. His research fields are CAD-CAM-CNC technologies, manufacturing technologies, machine design, biomechanics.
and Yasin Kisioglu
Yasin Kisioglu, born in 1967, received his PhD in the Industrial and Systems Engineering Department at Ohio State University, Ohio, USA, in 2000. He has been working as a Professor at the Biomedical Engineering Department at Kocaeli University. His research fields are construction and manufacturing, machine elements, machine design, computer-aided design, and manufacturing.

Published/Copyright: July 7, 2022

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From the journal Materials Testing Volume 64 Issue 7

Abstract

This study was aimed to produce and test dental implants made out of biocompatible commercial pure titanium (Grade 4) material with improved mechanical strength. The implant samples were designed and manufactured in real sizes using both machining and thread-rolling (TR) processes. This study is also discovering the benefits of cold forming (TR) versus machining processes in terms of increased efficient strength and reduced costs. To produce the samples using the TR method, a suitable TR processing bench including a pair of reverse threaded flat dies and relevant jigs and fixtures were designed and manufactured. The produced implant samples were tested with static and dynamic loads considering the requirements of the ISO14801:2016 standards. The obtained results were compared in terms of mechanical strength and fatigue life. Their microscopic structures and micro-hardnesses were examined to realize the effects of the manufacturing processes. In addition, the effects of hardness, surface roughness, and residual stresses on both mechanical strength and fatigue life of the implants were also evaluated. Therefore, the obtained results showed that the TR process is extremely effective to improve the implant strength and fatigue life.

Keywords: dental implants; fatigue lifecycle; mechanical strength; plastic deformation; thread rolling

Corresponding author: Serkan Aktas, Uzunciftlik Nuh Cimento Vocational School, Kocaeli University, 41180, Kocaeli, Turkey, E-mail: serkan.aktas@kocaeli.edu.tr

Funding source: Kocaeli University 10.13039/501100004077

Award Identifier / Grant number: 2019/033

About the authors

Serkan Aktas

Serkan Aktas, born in 1981, received his PhD in the Biomedical Engineering Department at Kocaeli University, Kocaeli, Turkey, in 2021. He has been working as a Lecturer at the Uzunciftlik Nuh Cimento Vocational High School at Kocaeli University. His research fields are CAD-CAM-CNC technologies, manufacturing technologies, machine design, biomechanics.

Yasin Kisioglu

Yasin Kisioglu, born in 1967, received his PhD in the Industrial and Systems Engineering Department at Ohio State University, Ohio, USA, in 2000. He has been working as a Professor at the Biomedical Engineering Department at Kocaeli University. His research fields are construction and manufacturing, machine elements, machine design, computer-aided design, and manufacturing.

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: The authors would like to thank profoundly to Scientific Foundation Unit of Kocaeli University with DOI: 10.13039/501100004077, Turkey, for the financial support of this Project, No. of 2019/033.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Published Online: 2022-07-07

Published in Print: 2022-07-26

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Articles in the same Issue

https://doi.org/10.1515/mt-2021-2159

Keywords for this article

dental implants; fatigue lifecycle; mechanical strength; plastic deformation; thread rolling