RCT for the Effectiveness of 3 Orthodontic Retention Schemes on Post-treatment Stability and Gingival Recession (OrthRe10tion)

National and Kapodistrian University of Athens

Status: Active, not recruiting

Conditions: Gingival Recession; Relapse

Treatments: Other: 0.028 bonded to canines; Other: 0.027 7-strand bonded to all 6; Other: removable Hawley-type

Study type: Interventional

Funder types: Other

Identifiers

NCT02742493

294

Details and patient eligibility

About

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.

Full 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.

Enrollment: 60 estimated patients

Sex: All

Ages: 10 to 16 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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60 participants in 3 patient groups

0.028 bonded to canines

Experimental group

Description:

lower fixed canine and canine retainer and upper removable Hawley (Intervention A)

Treatment:

Other: 0.028 bonded to canines

0.027 7-strand bonded to all 6

Experimental group

Description:

lower fixed canine to canine retainer and upper removable Hawley (Intervention B)

Treatment:

Other: 0.027 7-strand bonded to all 6

removable Hawley-type

Active Comparator group

Description:

lower hawley-type and upper hawley removable retainer (Control)

Treatment:

Other: removable Hawley-type