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Indirect bonding--do custom bases need a plastic conditioner? A randomised clinical trial.
1pmiles@beautifulsmiles.com.au
Australian Orthodontic Journal
|December 24, 2010
Summary
Methyl methacrylate monomer (MMM) conditioning of custom bases for indirect bonding offers no significant clinical benefit. This study found no difference in bracket failure rates between conditioned and unconditioned bases over six months.
Area of Science:
- Orthodontics
- Dental Materials Science
Background:
- Indirect bonding is a common orthodontic technique.
- Custom bases are used to enhance bracket adhesion.
- Methyl methacrylate monomer (MMM) conditioning is a potential method to improve adhesion.
Purpose of the Study:
- To evaluate the clinical failure rates of indirectly bonded orthodontic brackets.
- To compare the efficacy of methyl methacrylate monomer (MMM) conditioned custom bases versus unconditioned bases.
Main Methods:
- A split-mouth study design was employed with 36 patients.
- Indirectly bonded brackets were placed on custom bases, with half conditioned with MMM and half not.
- Bracket failures were recorded over a six-month period.
Main Results:
- A total of 828 brackets were placed.
- The failure rate for MMM-conditioned bases was 1.4% (6/828).
- The failure rate for unconditioned bases was 1.2% (5/828), with no statistically significant difference (p = 0.74).
Conclusions:
- Conditioning custom bases with methyl methacrylate monomer (MMM) is not necessary for indirectly bonded orthodontic brackets.
- The use of MMM conditioning does not improve clinical outcomes in terms of bracket retention.
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