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Bonded versus banded first molar attachments: a randomized controlled clinical trial
Philip Banks1, Tatiana V Macfarlane
1Burnley General Hospital, Casterton Avenue, Burnley, Lancashire BB10 2PQ, UK. philbanks_burnly@yahoo.com
Journal of Orthodontics
|June 5, 2007
Summary
Bonded first molar tubes showed a higher failure rate (33.7%) compared to cemented bands (18.8%) in fixed appliance therapy. This suggests bands may offer greater clinical reliability for molar anchorage.
Area of Science:
- Orthodontics
- Dental Materials Science
Background:
- Fixed appliance therapy often utilizes molar bands or direct bonding for anchorage.
- Clinical data comparing the failure rates of these two methods is crucial for treatment planning.
Purpose of the Study:
- To compare the clinical failure rates of bonded first molar tubes versus cemented molar bands in orthodontic treatment.
Main Methods:
- A prospective randomized controlled clinical trial was conducted across two UK hospital orthodontic clinics.
- 110 patients requiring fixed appliances were randomized to receive either bonded molar tubes (n=181) or cemented molar bands (n=186).
- Failure rates and time to failure were recorded for both groups.
Main Results:
- Bonded molar tubes exhibited a significantly higher first-time failure rate (33.7%) compared to cemented bands (18.8%).
- Bonded tubes were 2.4 times more likely to fail than bands.
- Patients receiving bonded tubes also experienced more bracket failures.
Conclusions:
- Directly bonded first molar tubes using Rely-A-Bond composite demonstrate a higher failure rate than traditional cemented bands with Intact glass ionomer cement (GIC).
- Cemented bands appear to be a more reliable option for first molar anchorage in fixed appliance therapy.