RCT for the Effectiveness of 3 Orthodontic Retention Schemes on Post-treatment Stability and Gingival Recession
- Conditions
- Gingival RecessionRelapse
- Interventions
- Other: 0.028 bonded to caninesOther: 0.027 7-strand bonded to all 6Other: removable Hawley-type
- Registration Number
- NCT02742493
- Lead Sponsor
- University of Athens
- 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.
Recruitment & Eligibility
- Status
- ACTIVE_NOT_RECRUITING
- Sex
- All
- Target Recruitment
- 60
- 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)
- No missing teeth, impacted teeth or other dental anomalies
- No congenital anomalies/ syndromes
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description 0.028 bonded to canines 0.028 bonded to canines lower fixed canine and canine retainer and upper removable Hawley (Intervention A) 0.027 7-strand bonded to all 6 0.027 7-strand bonded to all 6 lower fixed canine to canine retainer and upper removable Hawley (Intervention B) removable Hawley-type removable Hawley-type lower hawley-type and upper hawley removable retainer (Control)
- Primary Outcome Measures
Name Time Method Changes in Little's Irregularity Index in the mandible (mm) 1 year in retention, 2 years in retention, 5 years in retention 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 Arch length 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
- Secondary Outcome Measures
Name Time Method Changes in Arch length in the maxilla (mm) 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 Overbite and Overjet (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 Leveling or torque related problems of the lower anterior teeth 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 Accidental bond failures of fixed retainers or breakages of removable ones 1 year in retention, 2 years in retention, 5 years in retention
Trial Locations
- Locations (1)
Department of Orthodontics, School of Dentistry, University of Athens
🇬🇷Athens, Goudi, Greece