Does Double With Regular Monitoring Prevent Undesired Tooth Movement?

Study Overview
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Brief Summary
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The goal of observational study is to learn about the stability of orthodontic treatment results in orthodontic patients during retention phase of treatment.

Detailed Description
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The aim of the present study was to three-dimensionally analyze tooth movement in retention phase of treatment and wherever double effectively retention prevents it.

Official Title
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Does Double (Fixed and Removable Orthodontic Retention) With Regular Monitoring Prevent Undesired Tooth Movement?

Conditions
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Malocclusion

Intervention / Treatment
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* Diagnostic Test: Intraoral scan


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Non-extraction treatment No hypodontia Normal occlusion after treatment (Class I occlusion), perfect alignment Normal overjet and overbite Double retention including fixed retainer bonded from canine to canine in both dental arches and thermally formed removable splint Exclusion Criteria: Fixed orthodontic treatment in one dental arch Extraction cases Patient treated with orthognathic surgery Imperfect treatment result due to treatment cessation on patients demand or health issues Craniofacial disorders

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Study group<br>From all the patients meeting the inclusion criteria every third patients was randomly chosen and invited to participate in the study. Written informed consent was obtained from every participant. Thus 100 patients have agreed to participate. All fixed retainers (stainless steel braided rectangular wire) were bonded in both arches by the same experienced clinician, who subsequently made impression for thermally formed splints and delivered them on the day of debonding. The effect of each of the procedures was verified by two independent experienced clinicians. On the day of debonding, directly following retainer bonding, intraoral scans were performed (T0). The patients were invited for repeating the scans after 1 (T1), 3 (T2) and 6 months (T3). The displacements were assessed by superimposition of the scans. The patients were recommended to wear removable retainers 22h/day. They were instructed to immediately report a failure and to apply immediately to the office in case of failure. | Diagnostic Test: Intraoral scan<br>* On the day of debonding, directly following retainer bonding, intraoral scans were performed (T0), using 3Shape Trios 4 (3Shape, Copenhagen, Denmark). The scans were repeated after a month. The patients were invited for repeating the scans after 1 (T1), 3 (T2) and 6 months (T3).<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Tooth displacement in mm | Measurement obtained by comparing superimposed scans | One month after debonding | 
| Tooth displacement in mm | Measurement obtained by comparing superimposed scans | Three months after debonding | 
| Tooth displacement in mm | Measurement obtained by comparing superimposed scans | Six months after debonding | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Failure rate | Registration wherever the retention failure occured | Six months of observation | 
| Compliance rate | Registration of patients attending to scheduled visits | Six months of observation | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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retention, stability, orthodontic treatment, 3D analysis, intraoral scan