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Do we need primer for orthodontic bonding? A randomized controlled trial.
Sarabjit Singh Nandhra1, Simon J Littlewood2, Nadine Houghton2
1*Orthodontic Department, The Royal Bournemouth Hospital, saabsn@googlemail.com.
European Journal of Orthodontics
|September 20, 2014
Summary
Bonding orthodontic brackets without primer is clinically non-inferior to using primer, with no significant difference in bond-up times. However, bond failure is more likely without primer.
Area of Science:
- Orthodontics
- Dental Materials Science
Background:
- Direct bonding of orthodontic brackets is a standard procedure.
- The use of primer in direct bonding aims to enhance adhesion.
- Evaluating clinical performance without primer is crucial for procedural simplification.
Purpose of the Study:
- To assess the clinical performance of APC™II Victory Series™ brackets in direct orthodontic bonding.
- To compare bonding efficacy with and without the use of primer.
Main Methods:
- A prospective, non-inferiority randomized controlled clinical trial involving 92 patients.
- Brackets were bonded either with or without primer.
- Outcomes measured included bracket failures, bond-up time, and Adhesive Remnant Index (ARI) over 12 months.
Main Results:
- Bracket failure rates were 11.1% with primer and 15.8% without primer (non-inferior, P=0.08).
- No statistically significant difference in bond-up time was observed (P=0.402).
- A significant difference in ARI was found, with more enamel bonding without primer (76.5% vs 49.4%, P<0.0001).
Conclusions:
- Bonding APC™II Victory Series™ brackets without primer is statistically non-inferior to using primer.
- No significant difference in bond-up times was found.
- Bond failure is more likely at the composite-enamel interface when primer is omitted.
