Pre-Clinical Reports

Automated ablation of dental composite using an IR pulsed laser coupled to a plume emission spectral feedback system

Andrew T. Jang DDS, PhD

Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, California, 94143

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Kenneth H. Chan,

Kenneth H. Chan

Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, California, 94143

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Daniel Fried MS, PhD,

Corresponding Author

Daniel Fried MS, PhD

[email protected]

Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, California, 94143

Correspondence to: Daniel Fried, MS, PhD, Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, 707 Parnassus Avenue, University of California San Francisco, San Francisco, CA 94143-0758. E-mail: [email protected]

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Andrew T. Jang DDS, PhD,

Andrew T. Jang DDS, PhD

Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, California, 94143

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Kenneth H. Chan,

Kenneth H. Chan

Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, California, 94143

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Daniel Fried MS, PhD,

Corresponding Author

Daniel Fried MS, PhD

[email protected]

Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, California, 94143

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First published: 03 May 2017

https://doi.org/10.1002/lsm.22668

Citations: 5

Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.

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Abstract

Objective

The purpose of this study is to assemble a laser system for the selective removal of dental composite from tooth surfaces, that is feasible for clinical use incorporating a spectral feedback system, a scanning system, articulating arm and a clinical hand-piece, and evaluate the performance of that system on extracted teeth.

Methods

Ten extracted teeth were collected and small fillings were placed on the occlusal surface of each tooth. A clinical system featuring a CO₂ laser operating at 50 Hz and spectral optical feedback was used to remove the composite. Removal was confirmed using a cross polarized optical coherence tomography (CP-OCT) system designed for clinical use.

Results

The system was capable of rapidly removing composite from small preparations on tooth occlusal surfaces with a mean loss of enamel of less than 20 μm.

Conclusion

We have demonstrated that spectral feedback can be successfully employed in an automated system for composite removal by incorporating dual photodiodes and a galvanometer controlled CO₂ laser. Additionally, the use of registered OCT images presents as a viable method for volumetric benchmarking. Overall, this study represents the first implementation of spectral feedback into a clinical hand-piece and serves as a benchmark for a future clinical study. Lasers Surg. Med. 49:658–665, 2017. © 2017 Wiley Periodicals, Inc.

Supporting Information

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Volume49, Issue7

September 2017

Pages 658-665

Automated ablation of dental composite using an IR pulsed laser coupled to a plume emission spectral feedback system

Abstract

Objective

Methods

Results

Conclusion

Supporting Information

REFERENCES

Citing Literature

References

Information

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Automated ablation of dental composite using an IR pulsed laser coupled to a plume emission spectral feedback system

Abstract

Objective

Methods

Results

Conclusion

Supporting Information

REFERENCES

Citing Literature

References

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