N/A
Completed N=104
Vacuum-formed Retainer Versus Bonded Retainer to Prevent Relapse After Orthodontic Treatment
Orthodontics · Retention
Source: ClinicalTrials.gov NCT03070444 ↗
Enrolled (actual)
104
Serious AEs
0.0%
Results posted
Jun 2022
Primary outcomePrimary: Changes in Tooth Position — 0.05; 0.62 millimeters — p=0.0002
Summary
The purpose of this trial is to evaluate and compare stability after orthodontic treatment with an Essix retainer and a bonded cuspid-to-cuspid retainer (CTC), respectively in the mandibular arch and longitudinally follow these patients over time up to 5 years. The patients' perceptions of the two methods are also evaluated with questionnaires during the follow-up period.
A further aim of this study is to analyze the relationship between diagnosis, treatment outcome, treatment time, age at start of treatment and stability with an Essix retainer in the maxilla.
The null hypotheses are:
* that there is no difference in retention capacity between Essix retainer and cuspid-to-cuspid retainer
* that there is no difference in patients' perception between Essix retainer and cuspid-to-cuspid retainer
* that there is no difference in retention capacity for Essix retainer in the maxilla concerning diagnosis before treatment, treatment outcomes, treatment time and age at start of treatment
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Changes in Tooth Position |
0.05; 0.62 | 0.0002 sig |
| SECONDARY Patients' Perception |
93; 92 | 0.55 |
Eligibility Criteria
Inclusion Criteria
- Patients treated with fixed appliances in both the maxilla and the mandible
Exclusion Criteria
- Rapid Maxillary Expansion (RME) for patients with severe transversal malocclusion
- Treatment with segmented appliances
- Patients with craniofacial anomalies and patients requiring orthognatic surgery
- Patients with missing mandibular incisor
Data sourced from ClinicalTrials.gov (NCT03070444). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.