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Comparison of Vacuum-Formed Retainer Protocols using 3 Shape OrthoAnalyzer

Kaler, Harjot (2022) Comparison of Vacuum-Formed Retainer Protocols using 3 Shape OrthoAnalyzer. Master's Thesis, University of Pittsburgh. (Unpublished)

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Background: Retention is the final stage of orthodontic treatment. Despite it being last, retention is undoubtedly one of the most important components of treatment to preserve teeth in their corrected position (Johnston & Littlewood, 2015). Orthodontic tooth movement depends on coordinated tissue resorption and formation in the surrounding bone and periodontium (Li, Jacox, Little, & Ko, 2018). The periodontium along with other factors cause teeth to relapse or move back to their original position. Not only are there multiple types of retainers but there are variable protocols. The purpose of this study is to compare and determine the most efficacious Vacuum Formed retention protocol between 3 groups that range from full-time to part-time wear. The null hypothesis is there are no significant differences between the 3 different protocols. Hypothesis: There are no significant differences between the 3 different protocols. Materials and Methods: The 3 different retention protocol groups t varied from part-time to full time wear. Patients had a scan from when they were de-bonded, and they were scanned again 3 months after de-bond. These scans were analyzed by Little’s Irregularity index to identify and compare the amount of relapse. Results: The most efficient group was group B and the least efficient group was group F. However, the difference was negligible. Thus, we accept our null hypothesis that there are no significant differences between the 3 different protocols. Conclusions: No statistically or clinically significant difference between the 3 retention protocols were identified. Part-time wear is sufficient in preventing relapse for 3 months. A longer study needs to be done than 3 months. Ideally a study for 1 year or longer.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis AdvisorBuzzatto,
Committee MemberStacy,
Committee MemberBurnheimer,
Committee MemberShah,
Date: 9 August 2022
Date Type: Publication
Defense Date: 26 May 2022
Approval Date: 9 August 2022
Submission Date: 1 June 2022
Access Restriction: 2 year -- Restrict access to University of Pittsburgh for a period of 2 years.
Number of Pages: 41
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: Relapse, Retention
Date Deposited: 09 Aug 2022 18:53
Last Modified: 09 Aug 2022 18:53


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