An Evaluation of the Shear Bond Strength of a Flowable Composite Used with an Indirect Bonding Technique
Abstract
Purpose: The ability to treat patients efficiently is of benefit to both patient and provider. Unintended bracket failures are just one of the potential causes of reduced efficiency in the practice of orthodontics. To reduce bond failures, it is important that each orthodontist chooses a bonding system that achieves a clinically acceptable shear bond strength (SBS) of the adhesive within in the range of 5.9 MPa to 7.8 MPa (Reynolds, 1975). In the military, where treatment time can be limited, ensuring that brackets remain on the teeth is important. As such, military providers should choose adhesives and systems that reliably achieve a clinically acceptable level of SBS. The purpose of this study was toevaluate three bonding systems that are currently available at the Tri-Service Orthodontic Residency Program (TORP), the military orthodontic training site, to determine if there were any significant differences between the groups that might influence future bonding decisions. Methods: Sixty bovine incisors (Animal Technologies, Tyler, TX) were chosen for use in this study, divided into three groups of twenty. Each group was bonded with a different adhesive system Direct bonding with Transbond XT (3M Oral Care, St. Paul, MN), indirect bonding with Revolution 2 flowable (Kerr Corporation, Orange, CA), and indirect bonding with Opal Bond Flow (Opal Orthodontics, South Jordan, UT). The brackets were then debonded under shear loading forces with an Instron Universal Testing Machine (Instron, Northwood, MA) to test the SBS of each bracket. Mean SBS and standard deviations were evaluated along with the clinical acceptability rate of each system. Results: All three groups achieved a mean SBS that exceeded the minimum acceptable SBS value of 5.9 MPa. Brackets bonded directly with Transbond XT yielded the highest SBS and a 100 percent clinical acceptability rate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 2018
- Accession Number
- AD1128256
Entities
People
- Robert C. Engel
Organizations
- Uniformed Services University of the Health Sciences