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Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures

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An automatic robotic system for three-dimensional tooth crown preparation using a picosecond laser.

Lei Wang¹, Dangxiao Wang, Yuru Zhang

¹State Key Lab of Virtual Reality Technology and Systems, Beihang University, Beijing, China.

Lasers in Surgery and Medicine

|August 21, 2014

Summary

This study introduces an automated robotic laser system for precise 3D tooth crown preparation. The developed system demonstrates accuracy suitable for clinical dental applications, overcoming traditional method limitations.

Keywords:

layer-by-layer ablation picosecond laser robotic system tooth crown preparation

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Area of Science:

Dental Technology
Robotics
Laser Ablation

Background:

Traditional dental crown preparation methods have limitations impacting treatment success.
Laser techniques offer potential improvements over conventional approaches.

Purpose of the Study:

To develop an advanced robotic system for precise 3D laser ablation of teeth.
To enable automatic tooth crown preparation in clinical settings.

Main Methods:

An automated laser ablation system integrating robotics and laser technology was designed.
The system utilizes a layer-by-layer ablation strategy with precise 3D laser focus control.
Experiments were conducted using a picosecond laser on wax resin and actual teeth.

Main Results:

The system achieved high accuracy, with average linear errors of 0.06 mm (wax resin) and 0.05 mm (dentin).
Angular errors were 4.33° (wax resin) and 0.5° (dentin), with depth errors within 0.1 mm for both.
Ablation times were recorded as 1.5 hours for wax resin and 3.5 hours for dentin.

Conclusions:

The robotic system's precision and resolution meet clinical dental crown preparation requirements.
Experimental results indicate the viability of picosecond lasers for 3D tooth preparation.
Further research is necessary for clinical implementation of this automated system.