Naslov
Ablative potential of four different pulses of Er:YAG lasers and low-speed handpiece

Autori
Baraba, Anja ; Perhavec, Tadej ; Chieffi, Nicoletta ; Ferrari, Marco ; Anić, Ivica ; Miletić, Ivana

Izvornik
Photomedicine and laser surgery (1549-5418) 30 (2012), 6; 301-307

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ablation; caries; Er:YAG; profilometer; scanning electron microscopy

Sažetak
The aim of the study was to evaluate the microtensile bond strength of a composite resin to dentin modified with three different pulse durations of the Er:YAG laser based on Variable Square Pulse technology and with one self-etch adhesive. The entire occlusal enamel was removed to obtain flat dentin surface for forty eight human molar teeth. The teeth were randomly divided into four experimental groups (n= 12 per group), according to the pretreatment of dentin: 1) control group ; 2) SSP (Super Short Pulse: 50 sec) ; 3) MSP (Medium Short Pulse ; 100 sec) and 4) SP (Short Pulse ; 300 sec) with Er:YAG laser. The energy of the laser used was 80 mJ with average power of 0.8 W. The microtensile bond strength was tested with a universal testing machine. Two specimens from each experimental group were subjected to SEM examination, to observe the irradiated surface. Dentin surface treated with SSP showed significantly lower microtensile bond strength values (24±9.8 MPa) in comparison to the control group and SP group (35.3±12.8 MPa and 32.9±10.7 MPa, respectively), (p<0.05). MSP and SP group did not show any statistically significant difference in microtensile bond strength in comparsion to control group (p>0.05). The use of SP and MSP of the Er:YAG laser with one-step self-etch adhesive does not impair or improve the microtensile bond strength in dentin, while SSP may not be suitable for dentin surface treatment prior to bonding procedures.

Izvorni jezik
Engleski

Znanstvena područja
Dentalna medicina

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