Effect of brushing with sonic and counterrotational toothbrushes on the bond strength of orthodontic brackets.
The purpose of this study was to evaluate the effect of brushing with both a sonic and mechanical counter rotary power toothbrush on the bond strength of orthodontic brackets. Forty-five extracted teeth were divided into three random groups and had orthodontic brackets bonded to them. One group was brushed with a counterrotational toothbrush, the Interplak, one group with a sonic toothbrush, the Sonicare, and a third group was not brushed and was held as a control. After the equivalent of 2 years brushing, the teeth were placed in an Instron machine and the shear force to remove the brackets was recorded. Group 1, the counter rotary power brush, had a mean of 107.5 kg/cm2, the second group, the sonic brush, had a mean of 79.7 kg/cm2, and the control group had a mean of 125. 4 kg/cm2. Single factor analysis of variance followed by the Fisher-Hayter Multiple Comparison Procedure showed a statistically significant difference between the sonic power brush and the control (P <.01), but no significant difference between the counter rotary and the control (P >.05). There was no significant difference between the two power brushes (P >.05).
Hansen
P A
PA
University of Missouri at Kansas City, 64108, USA. Hans398@aol.com
Killoy
W
W
Masterson
K
K
D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D001840:Dental Bonding; D017005:Dental Debonding; D003799:Dental Stress Analysis; D006801:Humans; D016910:Orthodontic Brackets; D011897:Random Allocation; D012399:Rotation; D013010:Sonication; D014099:Toothbrushing / Q000295:instrumentation*
C065742:Transbond; D017438:Bisphenol A-Glycidyl Methacrylate