title: Effect of cavity preparation instruments (oscillating or rotating) on the composite-dentin interface in primary teeth.
abstract: OBJECTIVE
  To evaluate the effect of preparation of instruments on the interfacial integrity between cavity wall and composite restoration.
  
  
  METHODS
  Two class II slot preparations were done in 10 primary teeth either with SonicSys or with a conventional bur. The cavities were filled using an adhesive system. One layer of a flowable composite and one layer of a condensable composite were applied. The specimens were analyzed by confocal laser scanning microscopy.
  
  
  RESULTS
  In the SonicSys group the mean thickness of the hybrid layer was 6.12 (0.60) microm; in the control group it was 6.04 (0.63) microm. The difference was not statistically significant. Two fractures were observed in one tooth of each group. These were located only in the enamel. The cavity margins were beveled in all specimens.
  
  
  CONCLUSIONS
  Compared to conventional preparations, cavity preparation with SonicSys has no deleterious effect on the integrity of the interface.
authors.affiliation: Department of Restorative Dentistry, University of Heidelberg, Im Neuenheimer Feld 400, D-69120 Heidelberg, Germany. thomas_pioch@me.uni-heidelberg.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Pioch
authors.forename: Franklin
authors.initials: F
authors.lastname: García-Godoy
authors.forename: Heinz
authors.initials: H
authors.lastname: Duschner
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Koch
authors.forename: Hans J
authors.initials: HJ
authors.lastname: Staehle
authors.forename: Christof E
authors.initials: CE
authors.lastname: Dörfer
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000295:instrumentation*; D003754:Dental High-Speed Equipment; D003763:Dental Leakage / Q000517:prevention & control; D003793:Dental Restoration, Permanent; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D006801:Humans; D018613:Microscopy, Confocal; D019279:Resin Cements; D018709:Statistics, Nonparametric; D014094:Tooth, Deciduous; D014465:Ultrasonics
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D019279:Resin Cements; C078484:Syntac dentine adhesive