Improving Biocompatibility and Mechanical Properties of Titanium Implants Used in Orthopedic Surgeries: The Role of Machining Depth in Enhancing Surface Interaction with Bone Tissue

Document Type : RESEARCH PAPER

Authors

School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran

10.22038/abjs.2025.83963.3830

Abstract

Objectives: This study investigates the effect of cutting depth in dry milling on the structural, mechanical, and biocompatibility properties of pure titanium. The goal of this research is to analyze the changes in properties such as crystallite size, micro strain, wear rate, and behavior in simulated body fluid in various samples resulting from the milling process.

Methods: Three pure titanium samples with cutting depths of 0.1, 0.2, and 0.3 mm were produced for this study. XRD analysis was used to evaluate the structural properties, and wear rate was assessed through relevant tests. Additionally, a simulated body fluid test was performed to examine biocompatibility behavior.

Results: The XRD analysis revealed significant changes in crystallite size and micro strain, with crystallite sizes of 28, 50, and 25 nm, and micro strains of 0.0011, 0.0011, and 0.009, respectively. The wear rates were measured as 12.1, 7.9, and 5.3 mg. The results from the simulated body fluid test also showed significant effects of cutting depth on the biocompatibility and durability of the materials under conditions similar to the human body.

Conclusion: This study demonstrated that cutting depth in dry milling has a significant impact on the mechanical and biocompatibility properties of pure titanium. Proper selection of milling process parameters can enhance the mechanical performance and longevity of titanium implants in the human body. The findings of this research can contribute to the improvement of the design and manufacturing processes of titanium implants in the medical and biomedical industries.

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Articles in Press, Accepted Manuscript
Available Online from 25 October 2025
  • Receive Date: 01 December 2024
  • Revise Date: 07 October 2025
  • Accept Date: 20 July 2025