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Cutting characteristics of a sonic root‐end preparation instrument
Author(s) -
Devall R.,
Lumley P. J.,
Waplington M.,
Blunt L.
Publication year - 1996
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1996.tb00104.x
Subject(s) - magnification , materials science , perpendicular , instrumentation (computer programming) , inlet , biomedical engineering , acoustics , mathematics , optics , physics , geometry , engineering , mechanical engineering , computer science , operating system
The aim of this study was to investigate the culling ability of retro tips powered by a sonic handpiece (MM 1500, Micro Mega, Prodonta, Geneva, Switzerland). Two levels of the following variables were evaluated in this study: a) power selling with the air inlet ring half or fully open, b) orientation of lip perpendicular or parallel to the long axis of the handpiece, c) length of tip 2 or 3 mm, d) loading of 25 or 50 grams, e) tip size 35 or 55. The substrate used was 1 mm thick set lions of bovine bone and load was controlled by using a load cell interfaced with a transducer meter. Instrumentation time was fixed at 10 seconds with water irrigation. A 2 5 full factorial analysis was performed with two replications making a total of 64 experimental units. The resultant depth of cm was measured using a stereo microscope at x50 magnification. Analysis of the data indicated that all variables had a significant effect on cutting (ANOVA p<0.05). The most significant factor was power, followed by tip length, tip orientation, width and load. An increase in loading resulted in tip constraint and a reduction of culling at the lower power selling. In conclusion sonic ally activated retro tips were found to cut satisfactorily with instrument air inlet ring opening/power having the main effect.