<abstract xmlns="http://www.w3.org/1999/xhtml">

<sec><h3>Introduction</h3>
<p>A controlled clinical trial was undertaken to compare the effectiveness of Vivera<sup>®</sup> and Duran<sup>®</sup> retainers with regard to the survival, stability and occlusal settling over the first 6 months of retention following the completion of clear aligner treatment.</p>
</sec>
<sec><h3>Methods</h3>
<p>Consenting participants who met the inclusion criteria were recruited from a single, metropolitan Melbourne orthodontic practice. The participants were divided according to their retainer type, Vivera<sup>®</sup> (<italic>n</italic> = 10) or Duran<sup>®</sup> (<italic>n</italic> = 14). Each retainer type was fabricated to a standardised design. Intra-oral scans were taken at the time of debond (T<sub>0</sub>), at 3 months (T<sub>2</sub>) and at 6 months (T<sub>3</sub>). The participants wore their retainers full-time for the first 3 months and part-time for the remaining 3 months. The retainers were inspected at each review for damage that required replacement and failures were recorded in ‘days from insert’. Patient reported failures were also recorded. Intra-oral scans were assessed for changes in incisor irregularity and the number of occlusal contacts and comparisons between the two retainer groups were investigated. The impact of full-time and part-time wear on occlusal settling was also assessed for each retainer type.</p>
</sec>
<sec><h3>Results</h3>
<p>Vivera<sup>®</sup> retainers showed a greater survival time in comparison to Duran<sup>®</sup> retainers, as no Vivera<sup>®</sup> failures were observed over the initial 6 months of retention. Both retainer groups showed similar results related to incisor stability and occlusal settling. Part-time wear resulted in increased posterior settling for both retainer types.</p>
</sec>
<sec><h3>Conclusion</h3>
<p>Vivera<sup>®</sup> retainers were as clinically effective as the Duran<sup>®</sup> retainer but exhibit a significantly higher survival rate. Part-time wear of full-coverage thermoplastic retainers appears to increase posterior settling.</p>
</sec>
</abstract>

Introduction
A controlled clinical trial was undertaken to compare the effectiveness of Vivera® and Duran® retainers with regard to the survival, stability and occlusal settling over the first 6 months of retention following the completion of clear aligner treatment.

Methods
Consenting participants who met the inclusion criteria were recruited from a single, metropolitan Melbourne orthodontic practice. The participants were divided according to their retainer type, Vivera® (n = 10) or Duran® (n = 14). Each retainer type was fabricated to a standardised design. Intra-oral scans were taken at the time of debond (T0), at 3 months (T2) and at 6 months (T3). The participants wore their retainers full-time for the first 3 months and part-time for the remaining 3 months. The retainers were inspected at each review for damage that required replacement and failures were recorded in ‘days from insert’. Patient reported failures were also recorded. Intra-oral scans were assessed for changes in incisor irregularity and the number of occlusal contacts and comparisons between the two retainer groups were investigated. The impact of full-time and part-time wear on occlusal settling was also assessed for each retainer type.

Results
Vivera® retainers showed a greater survival time in comparison to Duran® retainers, as no Vivera® failures were observed over the initial 6 months of retention. Both retainer groups showed similar results related to incisor stability and occlusal settling. Part-time wear resulted in increased posterior settling for both retainer types.

Conclusion
Vivera® retainers were as clinically effective as the Duran® retainer but exhibit a significantly higher survival rate. Part-time wear of full-coverage thermoplastic retainers appears to increase posterior settling.

Comparative assessment of the survival, stability and occlusal settling between two types of thermoplastic retainers: a prospective clinical trial

Australasian Orthodontic Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

Introduction
A controlled clinical trial was undertaken to compare the effectiveness of Vivera® and Duran® retainers with regard to the survival, stability and...

Comparative assessment of the survival, stability and occlusal settling between two types of thermoplastic retainers: a prospective clinical trial

Published Online: Feb 17, 2022

Page range: 74 - 87

Received: Oct 01, 2021

Accepted: Jan 01, 2022

DOI: https://doi.org/10.21307/aoj-2022.011

© 2022 Bethany Cunning et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.