Study of surface topography, roughness, and microleakage after dental preparation with different instrumentation.
OBJECTIVE
The purpose of this study was to compare the differences in surface characteristics and roughness of teeth finished for porcelain veneer laminates using different instrumentation and to assess their influence on microleakage.


METHODS
Fifty-six extracted human maxillary central incisors were divided randomly into two groups: Group HsR teeth were finished with a high-speed handpiece with diamond burs; group SO teeth were finished with a sonic oscillating diamond instrument. Porcelain veneers were bonded to 24 teeth in each group. Microleakage was measured in the cervical area. Four remaining teeth in each group were examined using confocal laser-scanning microscopy and scanning electron microscopy.


RESULTS
Oscillating instruments produced a rougher dentinal surface (Ra values; P = .029) than those finished with high-speed rotary technology.


CONCLUSIONS
There is less microleakage when bonded restoration edges are situated over dentin that has been finished with sonic oscillating instrumentation (P = .006).
Ma Fernanda
MF
Solá-Ruiz
Ignacio
I
Faus-Matoses
Jamie
J
Del Rio Highsmith
Antonio
A
Fons-Font
D001840:Dental Bonding / Q000379:methods; D003754:Dental High-Speed Equipment; D003763:Dental Leakage / Q000145:classification*; D003776:Dental Porcelain / Q000737:chemistry; D003801:Dental Veneers; D003804:Dentin / Q000648:ultrastructure; D018130:Diamond / Q000737:chemistry; D004867:Equipment Design; D006801:Humans; D007180:Incisor / Q000648:ultrastructure*; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D013010:Sonication / Q000295:instrumentation; D013499:Surface Properties; D019237:Tooth Cervix / Q000648:ultrastructure; D019231:Tooth Preparation, Prosthodontic / Q000295:instrumentation*
D003776:Dental Porcelain; D018130:Diamond