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Preliminary study on a miniature laser manipulation robotic device for tooth crown preparation
Dangxiao Wang1, Lei Wang, Yuru Zhang
1State Key Lab of Virtual Reality Technology and Systems, Beihang University, Beijing, 100191, China.
Summary
A new miniature robotic device, LaserBot, precisely controls a femtosecond laser for dental hard tissue removal. This innovation offers a solution to drawbacks in current dental treatments, improving long-term success.
Area of Science:
- Robotics
- Biomedical Engineering
- Dental Technology
Background:
- Existing dental hard tissue removal methods have limitations impacting treatment success.
- Need for precise and minimally invasive tools in dental operations.
Purpose of the Study:
- Introduce LaserBot, a miniature robotic device for femtosecond laser-based dental crown preparation.
- To achieve precise 3D motion control of a laser focal point for tooth ablation.
Main Methods:
- Utilized voice-coil motors and optical grating rulers for high-resolution laser beam control.
- Developed a parallel five-linkage mechanism for compact 2D pitch/yaw rotation.
- Integrated a slider-rocker mechanism for precise laser focal point manipulation.
Main Results:
- LaserBot achieved precise 3D motion control of the femtosecond laser focal point.
- The device's working end (25x22x57 mm) is small enough for intraoral use.
- Demonstrated successful tooth ablation with an average repeatability error of 40 µm.
Conclusions:
- The developed robotic device enables precise laser ablation in the oral cavity.
- LaserBot's compact design is suitable for narrow dental workspaces.
- Identified limitations and specifications for future prototype development.
