Model of Ploughing Cortical Bone with Single-Point Diamond Tool

Area of Science:

• Biomaterials Engineering
• Orthopedic Surgery
• Manufacturing Processes

Background:

• Topological microstructures on cortical bone surfaces can guide bone cells for effective bone repair.
• Single-point diamond tools (SPDTs) offer efficient and flexible fabrication of these surface microstructures.
• Predicting and controlling cutting forces during the ploughing of cortical bone with SPDTs remains a challenge due to the material's unique properties.

Purpose of the Study:

• To develop a novel cutting model for predicting forces during the ploughing of cortical bone using SPDTs.
• To incorporate the shear stress anisotropy of bone and the force relationship between normal and tangential forces into the model.
• To validate the predictive accuracy of the proposed cutting model through experimental verification.

Main Methods:

• Development of a new cutting model that accounts for bone's anisotropic shear stress and force relationships.
• Conducting orthogonal cutting experiments on cortical bone using a single-point diamond tool.
• Comparing the model's calculated cutting forces with experimental data to assess accuracy.

Main Results:

• The developed cutting model accurately predicts cutting forces during the ploughing of cortical bone.
• The error between the model's calculated values and experimental data was found to be less than 5%.
• The model successfully integrates the anisotropic properties of cortical bone into force predictions.

Conclusions:

• The proposed cutting model provides a reliable method for predicting cutting forces in SPDT of cortical bone.
• This model can assist in the precise fabrication of surface microstructures for bone regeneration applications.
• The findings contribute to advancing techniques for creating optimized microenvironments on bone surfaces for improved healing.