Abstract
To evaluate the comparative effects of air-turbine and electric handpieces on dental preparation, 60 premolars were categorized into four groups, each comprising 15 specimens, based on the preparation method employed: air-turbine handpiece (Group A), and electric handpiece set at rotational speeds of 200,000[Formula: see text]rpm (Group B), 50,000[Formula: see text]rpm (Group C), and 20,000[Formula: see text]rpm (Group D). Analysis revealed no statistically significant difference in the surface roughness of the preparations across the four groups ([Formula: see text]). Similarly, no significant variance was observed in fracture resistance among the groups ([Formula: see text]). However, a notable distinction was detected in the degree of microleakage following the aging test ([Formula: see text]), with veneers prepared using the electric handpiece at 200,000[Formula: see text]rpm demonstrating the lowest average microleakage. It is noteworthy that the surface roughness of the preparations and the veneers’ fracture resistance remained unaffected by the variations in preparation method.
Published Version
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