Čes. stomatol. Prakt. zub. lék. (Czech Dental Journal) 2014; 114(3): 67-71 | DOI: 10.51479/cspzl.2014.012

Er: YAG Laser Contact and Non-Contact Delivery Systems Cavity Preparation and Sonic-Activated Bulk Composite Restoration

H. Jelínková1, M. Bučková2, T. Dostálová2,*, M. Kašparová2, J. Šulc1, M. Němec1, P. Bradna3
1 Stomatologická klinika dětí a dospělých 2. LF UK a FN Motol, Praha
2 Fakulta jaderná a fyzikálně inženýrská ČVUT, Praha
3 UKES 1. LF UK a VFN, Praha

Introduction: The comparison of tissue quality and its restoration after contact, and non-contact Er: YAG (2940 nm) laser radiation ablation was evaluated.

Methods: Laser setting for contact ablation was 250 mJ/pulse, pulse repetition rate 15 Hz, average power 3.75 W. For non-contact ablation these values were: 600 mJ/pulse, 6 Hz, 3.6 W. Structure of enamel and dentin after laser ablation was analyzed in scanning electron microscope. All cavities were filled by sonic-activated composite resin. Chemical and mechanical bond was observed in scanning electron microscope.
Microleakage was assessed quantitatively by the degree of methylene blue dye penetration. Fischer exact test (p < 0.05) was used for statistical evaluation.

Results: Contact and non-contact laser treatments prepared similar cavities (5167.31 μm versus 5356.31 μm). Defocusing of non-contact therapy has direct influence on the dye penetration microleakage presence (481.19 μm versus 611.94 μm) but this increase was not statistical significant.

Conclusion: Cavity prepared by contact mode with sonic-activated composite filling protects microleakage formation.

Keywords: dentistry; Er: YAG laser; sonic activated composite material

Published: September 1, 2014  Show citation

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Jelínková H, Bučková M, Dostálová T, Kašparová M, Šulc J, Němec M, Bradna P. Er: YAG Laser Contact and Non-Contact Delivery Systems Cavity Preparation and Sonic-Activated Bulk Composite Restoration. Čes. stomatol. Prakt. zub. lék. 2014;114(3):67-71. doi: 10.51479/cspzl.2014.012.
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