Orthodontic bonding: trial suggests primer not needed


This trial of the effects of primer on the bracket failure rate in orthodontic patients involved 49 patients, using a cross-mouth design; and found fewer bonding failures in the non-primer group 5.5%, compared with 3.1% in primer setting and adjusted odd ratio of 1.89 (95% CI 0.97–3.68).

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Orthodontic bonding: is primer necessary?

iStock_000002259334XSmall braces on teeth

This review of in-vitro studies included 9 studies and found photo-curing time, force location, bracket area, and crosshead speed of the testing machine affected sheer bond strength. Use of adhesive resin primer did not affect bond strength.

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