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 


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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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