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An Experimental Method to Determine the Interstitial Splitting Forces and Thermal Load Input Induced by Self-Tapping and Self-Drilling Bone Screws: A Pilot Study

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Fraunhofer Institute for Machine Tools and Forming Technology IWU, Nöthnitzer Straße 44, 01187 Dresden, Germany
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Department of Oral and Maxillofacial Surgery, University Hospital Carl Gustav Carus Dresden, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany
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Department of Prosthetic Dentistry, University Hospital Carl Gustav Carus Dresden, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany
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Machine Tools Development and Adaptive Controls, Technische Universität Dresden, Helmholtzstraße 7a, 01069 Dresden, Germany
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Author to whom correspondence should be addressed.
Academic Editor: Justin Keogh
Biomechanics 2021, 1(2), 239-252; https://doi.org/10.3390/biomechanics1020020
Received: 6 July 2021 / Revised: 30 August 2021 / Accepted: 31 August 2021 / Published: 2 September 2021
Background: The aim is to evaluate methods to quantify the interstitial splitting force and thermal load input of self-tapping and self-drilling osteosynthesis screws. Methods: A specialized modular test bench was developed to measure the induced splitting force of self-drilling and self-tapping osteosynthesis screws using porcine mandibular bone. In addition, a fundamentally new approach to measure the temperature near the contact zone of osteosynthesis screws (fiber-optic sensor in the axis of the screw) was established. Results: The self-drilling screw type induces a splitting force of about 200 N in the surrounding tissue, so that microdamage of the bone and increased resorption can be assumed. Even pre-drilling induces a short-time force into the tissue, which is comparable to the splitting force of the self-tapping screw. The temperature increase in the screw is clearly higher compared to the temperature increase in the surrounding tissue, but no significant difference in temperature between the two screw types could be measured. Based on the measured temperatures of both screw types, the temperature increase in the contact zone is considered critical. Complications during the screwing process caused by the manual tool guidance resulted in numerous breakages of the fiber-optic sensors. Conclusions: The developed methods provide additional insight regarding the thermomechanical load input of self-drilling and self-tapping screws. However, based upon the optical fiber breakages, additional refinement of this technique may still be required. View Full-Text
Keywords: biomechanics; mandibular bone; bone screws; experimental; self-drilling; self-tapping; temperature; force; thermomechanical load biomechanics; mandibular bone; bone screws; experimental; self-drilling; self-tapping; temperature; force; thermomechanical load
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MDPI and ACS Style

Ben Achour, A.; Petto, C.; Meißner, H.; Mostofa, A.; Teicher, U.; Haim, D.; Ihlenfeldt, S.; Lauer, G. An Experimental Method to Determine the Interstitial Splitting Forces and Thermal Load Input Induced by Self-Tapping and Self-Drilling Bone Screws: A Pilot Study. Biomechanics 2021, 1, 239-252. https://doi.org/10.3390/biomechanics1020020

AMA Style

Ben Achour A, Petto C, Meißner H, Mostofa A, Teicher U, Haim D, Ihlenfeldt S, Lauer G. An Experimental Method to Determine the Interstitial Splitting Forces and Thermal Load Input Induced by Self-Tapping and Self-Drilling Bone Screws: A Pilot Study. Biomechanics. 2021; 1(2):239-252. https://doi.org/10.3390/biomechanics1020020

Chicago/Turabian Style

Ben Achour, Anas, Carola Petto, Heike Meißner, Anita Mostofa, Uwe Teicher, Dominik Haim, Steffen Ihlenfeldt, and Günter Lauer. 2021. "An Experimental Method to Determine the Interstitial Splitting Forces and Thermal Load Input Induced by Self-Tapping and Self-Drilling Bone Screws: A Pilot Study" Biomechanics 1, no. 2: 239-252. https://doi.org/10.3390/biomechanics1020020

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