Lasers in Medical Science

, Volume 25, Issue 6, pp 823–828 | Cite as

A three-dimensional evaluation of microleakage of class V cavities prepared by the very short pulse mode of the erbium:yttrium–aluminium–garnet laser

  • Silvana Jukić Krmek
  • Ivana Bogdan
  • Paris Simeon
  • Goranka Prpić Mehičić
  • Davor Katanec
  • Ivica Anić
Original Article


The aim of this study was to evaluate microleakage along resin restoration in cavities prepared with an erbium:yttrium–aluminium–garnet (Er:YAG) laser, with and without acid etching, and to compare it with that in diamond-drilled cavities. Thirty intact molars were divided into three equal groups. In the teeth in group I, class V cavities were prepared with a diamond drill. Cavities in groups II and III were prepared with an Er:YAG laser (400 mJ/15 Hz for enamel and 250 mJ/10 Hz for dentine). The cavities in groups I and II were acid-etched and adhesive and flowable composite were applied to all cavities. The specimens were first immersed in dye for 24 h and then in 5% nitric acid for 72 h for softening. The fillings were extracted and photographed through a dissecting microscope. The leakage area was measured with specially designed software. The Kruskal–Wallis test showed that the best ranking was group II [mean range (m.r.) = 27.46], followed by group I (m.r. = 33.48) and, lastly, group III (m.r. = 45.15). The differences between groups I and III (P = 0.023) and between groups II and III were statistically significant (P = 0.080). The least microleakage was found in those cavities prepared by Er:YAG laser and subsequently acid-etched, whereas the most leakage was in the lased cavities that had not been etched; the traditional diamond-drilled acid-etched cavities produced medium leakage.


Erbium:yttrium–aluminium–garnet (Er:YAG) laser Class V cavities Microleakage Very short pulse Flowable resins Cavity preparation 



This work was part of projects supported by the Ministry of Science, Education and Sports of the Republic of Croatia, no. 065-0650445-0434 and no. 065-0650444-0418.


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Copyright information

© Springer-Verlag London Ltd 2009

Authors and Affiliations

  • Silvana Jukić Krmek
    • 1
  • Ivana Bogdan
    • 2
  • Paris Simeon
    • 1
  • Goranka Prpić Mehičić
    • 1
  • Davor Katanec
    • 3
  • Ivica Anić
    • 1
  1. 1.Department of Endodontics and Restorative Dentistry, School of Dental MedicineUniversity of ZagrebZagrebCroatia
  2. 2.Private PracticeZagrebCroatia
  3. 3.Department of Oral Surgery, School of Dental MedicineUniversity of ZagrebZagrebCroatia

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