J Korean Acad Prosthodont.  2019 Jan;57(1):1-7. 10.4047/jkap.2019.57.1.1.

A study on the processing of dental ceramic composites by using laser

• Hwang J
• Kwon SM
• Lee C
• Kim H
• Kim IS
• Lee KB

• KMID: 2431995
• DOI: http://doi.org/10.4047/jkap.2019.57.1.1

Abstract

PURPOSE
The laser processability of dental prosthesis is investigated using two ceramic composites, including 3M, Lava Ultimate and Ivoclar vivadent, IPS e.max.
MATERIALS AND METHODS
The COâ‚‚ laser, picosecond laser and femtosecond laser are used to assess the processing power of dental prosthetic materials Lava Ultimate and IPS e.max and the line processing shape was measured using a confocal microscope.
RESULTS
The brittleness, carbonization and micro crack of the ceramic composite were influenced by heat accumulation of the material and could be controlled by the laser power and pulse time.
CONCLUSION
In the case of COâ‚‚ lasers, micro crack and carbonation occurred immediately, and in the picosecond laser processing, the micro cracks are partially improved, but the carbonization occurs continuously. Finally, we confirmed the high efficiency of laser processing with femtosecond laser. In particular, Lava Ultimate, a ceramic resin composite material, showed the best processability when processed using a femtosecond laser.

Keyword

Dental ceramic composites; Laser processing; Picosecond laser; Femtosecond laser; CO2 laser

MeSH Terms

Carbon
Ceramics*
Dental Prosthesis
Hot Temperature
Lasers, Gas
Carbon

Figure

• 

  Fig. 1 Patent trend of laser milling development field (Unpublicized patent existence 2016 – 2017). Research on the patent trends of laser milling (DAEA Intellectual Property Consulting).

• 

  Fig. 2 Comparison of tool milling and laser milling. (A) Roland, (B) Dental wings.

Reference

1. Moon YH, Lee J, Lee MG. Shear bond strength of dental CAD-CAM hybrid restorative materials repaired with composite resin. J Korean Acad Prosthodont. 2016; 54:193–202.

2. Poticny DJ. A new class of CAD/CAM material. Dent Products Rep. 2011; 45:80–82.

3. Hatch T. Replace PFMs: Ivoclar Vivadent's IPS e.max CAD/CAM ceramic blocks help provide strength, shade versatility. Dent Products Rep. 2013; 47:84–85. 87

4. Bae M, Kim K, Park J. High precision / high quality laser processing of ceramic materials. Korean Soc Mech Eng. 2017; 1733–1738.

5. Kim S, Son IB, Jeong S. Precision microprocessing of ceramic by using femtosecond laser. Korean Soc Mech Eng. 2011; 5:26–28.

6. Kim DS, Oh BK. Numerical analysis of femtosecond laser material processing. J Korean Soc Precis Eng. 2006; 23:48–55.