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Effect of process parameters on the temperature changes during robotic bone drilling.

Ying Han^1,2, Chenxu Cai^1,2, Qinjing Lv^1,2

¹Key Laboratory of Efficient and Clean Machinery Manufacturing of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, China.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine

|July 13, 2022

Summary

Drill bit precooling effectively reduces bone drilling temperatures, minimizing thermal necrosis. Drill bit starting temperature and feed rate are key factors influencing drilling heat, crucial for robotic surgical systems.

Keywords:

Drill bit precooling process parameters response surface method robotic bone drilling temperature changes

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Area of Science:

Biomedical Engineering
Surgical Technology
Orthopedics

Background:

Bone drilling is essential in orthopedic surgery.
Thermal necrosis from drilling can impair bone healing and recovery.
Robot-assisted surgery demands precise control over drilling parameters.

Purpose of the Study:

To investigate drill bit precooling as a method to reduce bone drilling temperatures.
To analyze the influence of process parameters on drilling-induced heat.
To optimize parameters for minimizing thermal effects during robot-assisted bone drilling.

Main Methods:

Implementing a drill bit precooling technique within a robot-assisted drilling system.
Conducting experiments to measure drilling temperatures under varying parameters.
Utilizing response surface methodology to develop a predictive model for drilling temperature.

Main Results:

Drill bit precooling significantly reduces bone drilling temperatures.
Drill bit starting temperature and feed rate were identified as the most influential parameters.
A quadratic regression model accurately predicted drilling temperatures within the tested parameter range.

Conclusions:

Drill bit precooling offers an effective strategy to mitigate thermal damage during bone drilling.
Optimized parameters (e.g., 1610 rpm, 0.5 mm/s feed rate, 8°C start temp, 34.8 mm cooling length) minimize thermal necrosis.
This method enhances safety and improves outcomes in robot-assisted orthopedic procedures.