Effectiveness of Two Types of Fixed Lingual Retainers in Preventing Mandibular Incisor Relapse

Study Overview
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Brief Summary
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The study evaluates effectiveness of two types of fixed retainers in post orthodontic patients. Half of the subjects are randomly allocated Group 1 retainer (FRC) and other half is given Group 2 retainer (MSW) and followed for a period of one year.

Detailed Description
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54 subjects were recruited and divided into two groups by random allocation. Consents were obtained . Group 1 received fiber reinforced composite retainer and group 2 received multistranded stainless steel wire retainer. The patients were recalled at every three months interval for a period of 12 months. They were evaluated for number of fractures, failure pattern based on adhesive remnant index and relapse tendency by measuring little's irregularity index.

Official Title
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Effectiveness of Two Types of Fixed Lingual Retainers in Preventing Mandibular Incisor Relapse

Conditions
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Relapse

Intervention / Treatment
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* Device: Orthodontic retainers


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects who have completed fixed appliance orthodontic treatment. Subjects who have signed the consent forms. Subjects who have accepted the terms and conditions of visiting after every three months for one year. Non extraction cases in the mandibular arch with no IPR. Patients without caries/ restoration/ fracture on the lower anterior teeth. Patients with healthy periodontium with no periodontal disease at that time. Exclusion Criteria: Presence of syndrome or systemic disease. Patients taking medications/ drugs. Patients with poor oral hygiene. Patients with congenitally absent/ missing anterior teeth in the mandibular arch. Patients with habit of clenching/ bruxism. Patients with history of betel nut chewing. Presence of occlusal interferences.

Ages Eligible for Study
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Minimum Age: 14 Years
Maximum Age: 30 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Fiber reinforced composite retainers<br>Fiber reinforced composite retainers were inserted in group 1 and were evaluated after every 3 months for a follow up period of 3 months. | Device: Orthodontic retainers<br>* Orthodontic retainers were bonded on the lower teeth of the subjects after fixed orthodontic treatment and were evaluated for their effectiveness for the followup of one year.<br>|
| Experimental: Multistranded stainless steel retainers<br>Multistranded stainless steel retainers were inserted in group 2 and were evaluated after every 3 months for a follow up period of 3 months. | Device: Orthodontic retainers<br>* Orthodontic retainers were bonded on the lower teeth of the subjects after fixed orthodontic treatment and were evaluated for their effectiveness for the followup of one year.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Relapse tendency | It was measured using Little's irregularity index | 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Bond failure | Number of bond failure was assessed at each visit. | 12 months | 
| Failure Pattern | Type of failure pattern was assessed based on Adhesive remnant index. | 12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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fixed retainers, alignment