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Indirect bonding is considered to be a marvelous advancement in
orthodontics over the last decade. It is of great use to the orthodontist
through reducing chair time, providing patient comfort, and improving
bracket placement accuracy. Precise bracket positioning is of great
importance in efficient biomechanics application and in expressing the
full potential of a preadjusted edgewise appliance, as well as providing
less chair side time. Many researchers have tried their methods to
accomplish indirect bonding by changing their ways during clinical or
laboratory procedures. Also many studies have been conducted in order to
test the indirect technique effectiveness. Actually, only few reports
assessed the clinical reliability of the computer aided indirect bonding
techniques either through complete trays compared with sectional trays, In
this study we evaluated the accuracy of the transfer tray in both complete
computer aided trays and sectional computer-aided trays, 20 participants
were enrolled in this study from the out-patient clinic of the Orthodontic
Department of the Faculty of Dentistry Ain-Shams University and were
randomly allocated in two groups. Measurements in six positional
discrepancies (Mesio-distal, Occlusogingival, Buccolingual, Rotation,
Tip, and Torque) were calculated and pre-transfer vs post-transfer data
were compared digitally.
The following conclusions could be derived from the results of this
1- Both Computer-aided indirect bonding transfer methods can be
used with confidence as it is accurate and within the clinically
2- Sectional computer aided indirect bonding method revealed better
results in all dimensions as it had better control, better tray seating
and more accurate transfer and can be used in cases with mild
3- Both methods are technique sensitive.
4- Although transfer errors were mainly in occlusogingival
dimension towards gingival and in buccolingual towards buccal
direction, still errors were within clinically acceptable limits.
5- Computer-aided indirect bonding proved better time frame
compared to conventional indirect bonding.
6- Premolars had greater transfer errors in bracket position than do
7- Excessive pressure on IBT could affect brackets position accuracy.
1) Using color coded adhesive material for easier detection of excess
2) Gingival guide can be used to ensure proper tray seating.
3) Tray design modification using bracket positioning jigs can result in
better access for excess composite removal.
4) For cases with severe crowding, tray segmentation is recommended
for easier seating and more accurate transfer