Link to the University of Pittsburgh Homepage
Link to the University Library System Homepage Link to the Contact Us Form

Comparison of Bracket Failure Using a Hydrophilic and Hydrophobic Primer

Loo, Brenda H (2023) Comparison of Bracket Failure Using a Hydrophilic and Hydrophobic Primer. Master's Thesis, University of Pittsburgh. (Unpublished)

Download (364kB) | Preview


Introduction: The most common problem during fixed orthodontic treatment is bond failure, caused by either excessive forces or poor bond preparation. Hydrophilic primers were introduced to decrease bond failures due to moisture contamination by allowing the ability to bond on both wet and dry enamel. The main objective of this study is to investigate whether using a hydrophobic or hydrophilic primer will affect bracket failure rates. Methods: Patients who met the inclusion and exclusion criteria were recruited from University of Pittsburgh School of Dental Medicine Department of Orthodontics. Participants were sequentially assigned an alternating contralateral bonding pattern and their teeth were prepared using both hydrophobic (Transbond XT primer) and hydrophilic (Assure Plus) primers. Patient chart reviews were completed six months post-bonding for bracket failures. Results: Overall, there were no statistically significant bracket failure rate differences between Transbond XT and Assure Plus. In addition, there were no differences when comparing failure rates between the maxillary and mandibular arches. However, Assure Plus showed a statistically significant difference when comparing bracket failure rates in the anterior (4.44%) and posterior (1.67%) segments. Conclusions: After six months, Transbond XT had a failure rate of 4.67% and Assure Plus had a failure rate of 2.67%. There was a significantly higher anterior failure rate for Assure Plus compared to the posterior, 4.44% and 1.67% respectively. Overall, Assure Plus is a comparative alternative to conventional hydrophobic primers. A longer evaluation period of 9 – 12 months should be considered in future research.


Social Networking:
Share |


Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Loo, Brenda HBHL15@pitt.eduBHL16
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairBuzzatto, Johnjfb33@pitt.edujfb33
Committee MemberBurnheimer, Johnjmb334@pitt.edujmb334
Committee MemberShah, Nileshnhs3@pitt.edunhs3
Committee MemberBaker, Natashanab74@pitt.edunab74
Date: 30 March 2023
Defense Date: 22 May 2023
Approval Date: 1 July 2023
Submission Date: 26 May 2023
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 47
Institution: University of Pittsburgh
Schools and Programs: School of Dental Medicine > Dental Science
Degree: MDS - Master of Dental Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: orthodontic, bonding, transbondXT, AssurePlus, bonding failure, hydrophilic, hydrophobic
Date Deposited: 01 Jul 2023 13:32
Last Modified: 01 Jul 2023 13:32


Monthly Views for the past 3 years

Plum Analytics

Actions (login required)

View Item View Item