Orthodontic Bracket Bond Strength Using Self-Etching Primer With or Without Pumice or Acid Etch Pretreatment

The purpose of this study was to compare the shear bond strength of orthodontic brackets to enamel in four bonding protocols: SEP without prior pumicing (None), Pre-etch and SEP without prior pumicing (Pre-etch), control: SEP with prior pumicing (Pumice), and Pre-etch and SEP with prior pumicing (Both). 80 extracted bovine incisors were randomly divided into 4 groups of 20, and brackets were bonded under the different experimental conditions. Debonding force was measured with an Instron universal testing machine. A two-way ANOVA comparing the four groups indicated that there was a significant difference in debonding force (P = 0.001). The SEP without prior pumicing group (17.69 ± 7.18 MPa) was statistically different from the SEP group with prior pumicing (25.82 ± 6.84 MPa). There was no statistical difference found among the other groups. Differences in the Adhesive Remnant Index (ARI) were analyzed by chi-square. ARI scores differed significantly (P =0.0048).

Name thesis:degree_name

Master of Science

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Orthodontics

Year dc:date.available

2008

Author dc:creator

• DeCastro, Ana Paula

Contributors dc:contributor

• Dr. Bhavna Shroff
• Dr. Steven Lindauer

• orthodontics
• etch
• bonding
• pre-etch
• self-etch primers
• Dentistry
• Medicine and Health Sciences
• Orthodontics and Orthodontology

Statement dc:rights

• © The Author

Identifier

https://scholarscompass.vcu.edu/etd/1275

OAI identifier oai:identifier

oai:scholarscompass.vcu.edu:etd-2274