Microleakage and damage to adjacent teeth when finishing Class II adhesive preparations using either a sonic device or bur.
OBJECTIVE
To detetmine the damage to adjacent tooth surfaces and the quality of the marginal seal of a resin-based composite restoration when a sonic preparation device (Sonicsys) was used to finish the preparation outline.


METHODS
Three general practitioners prepared 60 Class II box-type cavities in extracted teeth placed in an artificial jaw in a phantom-head. In 30 preparations a bevel was made with a bur, in the other 30 restorations the margins were finished using the sonic preparation device. All preparations were restored with a total-etch technique and a posterior composite (SA primer-Photo Bond-Clearfil PhotoPosterior). Microleakage was tested and the adjacent teeth were inspected for iatrogenic damage.


RESULTS
No statistically significant differences in microleakage were observed between the experimental and control groups. In the control group, 80% of the approximal surfaces of adjacent teeth were damaged while only 30% of the adjacent surfaces were damaged in the experimental group (P < 0.05, Chi-square test).
Opdam
Niek J M
NJ
Department of Cariology and Endodontology, University of Nijmegen, The Netherlands. n.opdam@dent.kun.nl
Roeters
Joost J M
JJ
van Berghem
Edwin
E
Eijsvogels
Edwin
E
Bronkhorst
Ewald
E
D001641:Bicuspid; D016009:Chi-Square Distribution; D003188:Composite Resins; D003737:Dental Cavity Preparation / Q000009:adverse effects* / Q000295:instrumentation*; D003743:Dental Enamel / Q000293:injuries; D003762:Dental Instruments / Q000009:adverse effects*; D003763:Dental Leakage / Q000209:etiology*; D003793:Dental Restoration, Permanent / Q000379:methods; D006801:Humans; D003765:Models, Dental; D018677:Tooth Injuries / Q000209:etiology; D014465:Ultrasonics / Q000009:adverse effects*
D003188:Composite Resins