The Journal
A 37 % phosphoric acid etchant was applied to the enamel surfaces for 15 seconds , then rinsed with water and dried until the enamel was frosty white . Transbond MIP ( Fig-1 ) was applied to the etched enamel , according to the manufacturer ’ s instructions , followed by a gentle burst of air .
The brackets were coated with composite and positioned and light-cured as described for the first group .
Initial archwires 0.012 NiTi were placed immediately after bonding . All patients received the same instructions and were treated by same operator using a similar preadjusted edgewise technique .
Patients were seen at three-to-four-week intervals , but were asked to come in as soon as possible if a bond failure became apparent . The sites and dates of any bond failures during the first nine months of treatment were recorded .
Results
Fig 1 : Transbond
The bracket bases were coated with composite ( Ormco ), and the brackets were positioned on the teeth with gentle pressure . After excess adhesive was removed , each bracket was cured for 10 seconds per side with a LED .
In the other quadrants , where the conventional methods were used , the teeth were isolated and dried with oil-free air . A 37 % phosphoric acid etchant was applied to the enamel surfaces for 15 seconds , then rinsed with water and dried until the enamel was frosty white . Orthosol ( Fig- 2 ) was applied as a bonding agent onto the tooth surface .
Total twenty eight bond failures were noted during the nine-month observation period : Ten with conventional method and Eighteen with the Transbond .
A paired t test was applied for statistical analysis . All statistical analyses were performed with a software package ( Statistical Package for Social Sciences , Windows 98 , version 10.0 , SPSS , Chicago , Ill ).
Table 1 : Total no of Bond Failure with Transbond ( Hydrophilic ) and Orthosol Primer Systems
Fig 2 : Orthosol and Composite
30 Vol . 13 No . 1 Jan-April 2017