Crack Extension Analysis and Parameter Optimization in Robot-Assisted Cracked Tooth Preparation Process: Finite...

Area of Science:

• Biomedical Engineering
• Dental Materials Science
• Robotics in Medicine

Background:

• Robot-assisted dental procedures aim to improve precision but risk damaging cracked teeth.
• Inappropriate grinding parameters can lead to crack extension and tooth fracture.

Purpose of the Study:

• To develop a thermal-mechanical coupling model for optimizing robot-assisted cracked tooth preparation parameters.
• To minimize crack extension and tooth fracture during robotic preparation.

Main Methods:

• Established a grinding force model and analyzed tooth surface temperature fields.
• Utilized a thermal-mechanical coupling model to determine optimal feed and rotational speeds.
• Calculated stress intensity factors to define safe preparation parameter ranges.

Main Results:

• Optimized parameters reduced normal grinding force by 19.32% and surface temperature by 56.26%.
• Reduced pulpal thermal damage compared to conventional parameters.
• Achieved crack extension prevention rates of 73.33% (xoz), 93.33% (yoz), and 86.67% (xoy) via Micro-CT scanning.

Conclusions:

• The thermal-mechanical coupling model effectively optimizes parameters for robot-assisted cracked tooth preparation.
• Optimized parameters enhance safety by reducing mechanical and thermal damage to cracked teeth.
• This approach shows significant potential for preventing crack propagation during robotic dental procedures.