Efficacy and Cost-effectiveness of Orthodontic Retention Protocols (orthoretenti)

Poliklinika Orthonova

Status: Unknown

Conditions: Orthodontic Relapse

Treatments: Device: fixed retainer; Device: removable retainer

Study type: Interventional

Funder types: Other

Identifiers

NCT05121220

66771011

Details and patient eligibility

About

Objective is to assess changes of dentition and periodontium, and hygiene in retention after the end of the active phase of orthodontic treatment, and relationship with gender, type of retention appliance, pre-therapeutic condition of dentition and duration of active phase of treatment.

Full description

A total of 152 subjects will be recruited and randomly assigned into three groups. First group will have a square 8-stranded 0.673x0.268 mm retainer wire bonded in mandibular teeth after completing the active phase of comprehensive orthodontic treatment with fixed appliances. Retainer will be bonded on lingual site canine to canine on each tooth. Second group will have a round 6-stranded 0.40 mm retainer in mandible. Third group will be without fixed retainer, only with thermoplastic vacuum-formed removable Essix retainer in mandible.

Subjects will be examined before orthodontic treatment (T0), upon completion of treatment (T1), six months in retention (T2), two years (T3) and three years in retention (T4). Changes in intercanine width, relapse (unexpected tooth movements), retainer failure, accumulation of biofilm, calculus and gingivitis will be assessed.

Enrollment: 152 estimated patients

Sex: All

Ages: 11 to 18 years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria: finished orthodontic treatment, participants must have all permanent teeth Exclusion Criteria: hypodontia, missing teeth

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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152 participants in 3 patient groups

fixed mandibular lingual rectangular retainer 0.673 x 0.268 mm

Experimental group

Description:

0.673 x 0.268 mm 8-stranded wire Bond A Braid (Reliance Orthodontic Products, USA) will be bonded in mandible canine to canine on each tooth using Filtek flowable composite (Ivoclar Vivadent, Lichtenstein) and Multilink adhesive (3M, USA).

Treatment:

Device: fixed retainer

fixed mandibular lingual round retainer 0.40 mm

Experimental group

Description:

0.40 mm round 6-stranded wire (Forestadent, Germany) will be bonded on 6 mandibular frontal teeth, canine to canine on each tooth using Filtek flowable composite (Ivoclar Vivadent, Lichtenstein) and Multilink adhesive (3M, USA).

Treatment:

Device: fixed retainer

removable mandibular retainer

Active Comparator group

Description:

Group without fixed retainer will be wearing removable thermoplastic vacuum-formed Essix retainer

Treatment:

Device: removable retainer