title: Enamel and dentine of deciduous teeth Er:YAG laser prepared. A SEM study.
abstract: OBJECTIVE
  The aim of this study was to observe dentine and enamel surfaces of deciduous teeth under SEM after cavity preparation with Er:YAG laser using different fluences. The results showed that when using Er:YAG laser for cavity preparation in deciduous teeth, no carbonisation or cracks were observed on the enamel and dentine surfaces using energy output between 150-250 Mj, and frequency 15 Hz. The SEM images of the dentine and enamel surfaces were similar to previous studies on permanent teeth: enamel with a typical "lava flow" appearance as a result of an open core of the prism that has lost its typical hexagonal aspect and the dentine with opened tubules plus a difference in the mineral thickness between peritubular and intertubular.
  
  
  CONCLUSIONS
  The difference between the SEM images of deciduous enamel and dentine when using three different energies (150-200-250 mJ) is not significant in order to recommend the use of one type of output energy. In addition, the SEM images are similar TO those of permanent teeth.
authors: Department of Paediatric Dentistry, University Sapienza of Rome, Italy. Roly.kornblit@tiscali.it
authors: R
authors: R
authors: Kornblit
authors: M
authors: M
authors: Bossù
authors: D
authors: D
authors: Mari
authors: J P
authors: JP
authors: Rocca
authors: A
authors: A
authors: Polimeni
mesh_terms: D003743:Dental Enamel / Q000648:ultrastructure*; D003804:Dentin / Q000648:ultrastructure*; D006801:Humans; D053685:Laser Therapy; D008855:Microscopy, Electron, Scanning / Q000379:methods*; D014094:Tooth, Deciduous / Q000648:ultrastructure*