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

Bethany Cunning
Bethany Cunning
, 
Alison Sahhar
Alison Sahhar
, 
Sarah Lawrence
Sarah Lawrence
, 
David Manton
David Manton
 und 
Paul Schneider
Paul Schneider
   | 17. Feb. 2022
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Online veröffentlicht: 17. Feb. 2022
Seitenbereich: 74 - 87
Eingereicht: 01. Okt. 2021
Akzeptiert: 01. Jan. 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.

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.
eISSN:
2207-7480
Sprache:
Englisch
Zeitrahmen der Veröffentlichung:
Volume Open
Fachgebiete der Zeitschrift:
Medizin, Vorklinische Medizin, Grundlagenmedizin, andere
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