Use of a "Flash-free" Adhesive Resin for Orthodontic Bracket Bonding: a Clinical Study of Bonding Time, Bond Survival, and Adhesive Remnant Cleanup
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Malocclusion
- Sponsor
- University of Minnesota
- Enrollment
- 49
- Locations
- 1
- Primary Endpoint
- Bonding Time
- Status
- Completed
- Last Updated
- 5 years ago
Overview
Brief Summary
The purpose of this study is to compare bonding time, bond survival, amount of adhesive remaining on the tooth surface after bracket debonding, and time required for adhesive remnant cleanup between a new "flash-free" and a conventional adhesive resin for orthodontic bracket bonding.
Detailed Description
Patients presenting for comprehensive orthodontic treatment with fixed appliances at the University of Minnesota, who are willing to participate, will be included in the initial study. Selection criteria will include full permanent dentition through the first molars, teeth with sound, non-carious buccal enamel and no pretreatment with chemical agents such as hydrogen peroxide, and no previous orthodontic treatment with fixed appliances. The patients will have their maxillary incisors, canines, and premolars bonded with ceramic orthodontic brackets pre-coated with a "flash-free" adhesive resin (Clarity Advanced Brackets APC flash-free, 3M Unitek, Monrovia, CA, USA) on one side and a conventional adhesive resin (Clarity Advanced Brackets APC II, 3M Unitek) on the other side. The side allocation and order of bonding will be randomized for each patient.
Investigators
Eligibility Criteria
Inclusion Criteria
- •Full permanent dentition including incisors, canines, premolars, and first molars
- •Teeth with sound, non-carious buccal enamel and no pretreatment with chemical agents such as hydrogen peroxide
- •No previous orthodontic treatment with fixed appliances
Exclusion Criteria
- •Mental/emotional/developmental disability
- •Cleft lip and/or palate, craniofacial anomaly, or syndrome
- •Obvious oral hygiene issues such as excessive plaque accumulation, gingivitis, and/or pre-existing white spot lesions
- •Prosthodontic or restored substrate extending on the labial surface of maxillary teeth
- •Known allergies to any acrylates contained in the study materials
Outcomes
Primary Outcomes
Bonding Time
Time Frame: At appliance placement, 30 minutes
The time taken to bond each tooth was timed to the nearest second using a digital stopwatch. Timing was started after enamel surface preparation and stopped before light curing. Outcome reported in seconds.
Bond Survival
Time Frame: 1 year post treatment
Bond failure (yes or no) was recorded at standardized appointments at intervals of 4 weeks. Outcome is reported as the cumulative number of failed bracket bonds across all participants at 1 year post-treatment.
Amount of Adhesive Remaining on the Tooth Surface After Bracket Debonding
Time Frame: At completion of treatment, 10 minutes.
In case of a bond failure, the adhesive remnant index (ARI) was scored. The ARI is a point-based system ranking: 0, no adhesive left on the tooth; 1, less than half of the adhesive left on the tooth; 2, more than half of the adhesive left on the tooth; and 3, all adhesive left on the tooth.
Time Required for Adhesive Remnant Cleanup
Time Frame: At completion of treatment, 30 minutes.
If adhesive remained after bracket de-bonding, then the time required to remove the remnant adhesive was measured using a digital stop-watch. Outcome is reported in seconds.