ABSTRACT
The aim of this study was to systematically review the available studies measuring
the bond strength of orthodontic bracket-adhesive system under different experimental
conditions in vivo. Literature search was performed in four different databases: PubMed, Web of Science,
Cochrane, and Scopus using the keywords – bond strength, orthodontic brackets, bracket-adhesive,
and in vivo. A total of six full-text articles were selected based on the inclusion and exclusion
criteria of our study after a careful assessment by the two independent reviewers.
Data selection was performed by following PRISMA 2009 guidelines. Five of the selected
studies were clinical trials; one study was a randomized clinical trial. From each
of the selected articles, the following data were extracted – number of samples, with
the type of tooth involved materials under experiment methods of measurement, the
time interval between bonding and debonding orthodontic brackets, mode of force application,
and the bond strength results with the overall outcome. The methodological quality
assessment of each article was done by the modified Downs and Black checklist method.
The qualitative analyses were done by two independent reviewers. Conflicting issues
were resolved in a consensus meeting by consulting the third reviewer (MKA). Meta-analysis
could not be performed due to the lack of homogenous study results. The review reached
no real conclusion apart from the lack of efforts to clinically evaluate the bonding
efficiency of a wide range of orthodontic bracket-adhesive systems in terms of debonding
force compared to laboratory-based in vitro and ex vivo studies.
Key words:
Bond strength - bracket-adhesive -
in vivo
- orthodontic brackets
