Gingival Recession, Relapse
Conditions
Keywords
relapse, irregularity, recession, retention
Brief summary
The present study aims to assess the effectiveness of three different retention schemes used to maintain tooth position after orthodontic treatment with fixed orthodontic appliances (stability) and to evaluate possible association between retention scheme and gingival recessions on the lingual surfaces of the lower anterior teeth seen for up to 5 years post-treatment. Moreover the possible association between primary relapse tendency and long term occlusal stability will be evaluated.
Detailed description
This is a randomized, controlled, single-center, equivalence trial with three parallel groups and an allocation ratio of 1:1:1, that aims to investigate the effectiveness of 3 orthodontic retention schemes on post-treatment mandibular arch stability and gingival recession.
Interventions
OTHER0.028 bonded to canines
lower fixed canine and canine retainer (0.028 stainless steel bonded to canines) and upper removable Hawley (Intervention A)
OTHER0.027 7-strand bonded to all 6
lower fixed canine to canine retainer (7-strand Twistflex 0.027 bonded to all six anterior teeth) and upper removable Hawley (Intervention B)
OTHERremovable Hawley-type
lower Hawley-type and upper Hawley removable retainer (Control)
Sponsors
University of Athens
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
10 Years to 16 Years
Healthy volunteers
Yes
Inclusion criteria
* Both sexes * Age between 10 and 16 years * At the finishing stage of orthodontic treatment, programmed for debonding * Class I to Class II molar relationship before the beginning of orthodontic treatment * Non-extraction treatment plan with fixed straight-wire appliances * Space deficiencies and irregularity of no more than 6mm in the maxillary/ mandibular arch (Irregularity Index)
Exclusion criteria
* No missing teeth, impacted teeth or other dental anomalies * No congenital anomalies/ syndromes
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Changes in Intercanine width in the mandible (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Interpremolar width in the mandible (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Intermolar width in the mandible (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Little's Irregularity Index in the mandible (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Arch length in the mandible (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
Secondary
| Measure | Time frame |
|---|---|
| Changes in Overbite and Overjet (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Gingival Recessions on the lingual surfaces of the six lower anterior teeth | 1 year in retention, 2 years in retention, 5 years in retention |
| Leveling or torque related problems of the lower anterior teeth | 1 year in retention, 2 years in retention, 5 years in retention |
| Accidental bond failures of fixed retainers or breakages of removable ones | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Intercanine width in the maxilla (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Interpremolar width in the maxilla (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Intermolar width in the maxilla (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
| Changes in Arch length in the maxilla (mm) | 1 year in retention, 2 years in retention, 5 years in retention |
Countries
Greece
Outcome results
None listed