Impact of Gingival Crevicular Fluid microRNAs on Orthodontic Tooth Movement

Study Overview
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Brief Summary
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A split-mouth study is conducted in order to evaluate the impact of orthodontic movement on the expression of gingival crevicular fluid miRNAs related to inflammation and osteoclastogenesis during canine distalization following asymmetrical extraction treatment of upper first premolars. Samples of gingival crevicular fluid on the mesial and distal side of the canines to be examined will be performed during the baseline and during various follow-ups.

Detailed Description
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A split-mouth study is conducted in order to evaluate the impact of orthodontic movement on the expression of gingival crevicular fluid miRNAs related to inflammation and osteoclastogenesis during canine distalization following asymmetrical extraction treatment of upper first premolars. Orthodontic tooth movement induces bone remodeling by various signaling pathways. The variations in miRNAs expression and their impact in inflammation and osteoclastogenesis during the various stages of orthodontic tooth movements is not fully understood. 58 patients requiring asymmetrical upper first premolar extraction for orthodontic purposes have been enrolled for this split-mouth study: the canines to be distalized on the extractive site are considered as the test group, the controlateral canines (on the side without first premolar extraction) areconsidered as normal controls.

Official Title
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Impact of Gingival Crevicular Fluid microRNAs on Orthodontic Tooth Movement: a Split Mouth Study

Conditions
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Orthodontic Tooth Movement

Intervention / Treatment
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* Device: Elastomeric powerchain


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients with excellent oral hygiene throughout the study period, patients requiring asymmetrical maxillary first premolar extraction so monolateral canine retraction will be performed as a part of the treatment, patients available to come back at the clinic at the times of sample collection. Exclusion Criteria: poor oral hygiene and/or bleeding on probing, use medications, steroids or other anti-inflammatory medications, systemic health problems or smoking.

Ages Eligible for Study
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Minimum Age: 11 Years
Maximum Age: 18 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: Basic Science
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Interventional Model Description: The main objective of the study is to evaluate the impact of orthodontic tooth movement on gingival crevicular fluid miRNAs related to inflammation and osteoclastogenesis.
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Canines to be distalized<br>The canines need distalization after orthodontic upper first premolar asymmetrical extractions. | Device: Elastomeric powerchain<br>* Canine distalization by engaging the elastomeric power chains onto the canine brackets.<br>|
| No Intervention: Controlateral canines<br>The controlateral canines don't need distalization since the adjacent first premolars are not extracted. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| miRNAs expression | miRNAs expression in the gingival crevicular fluid by PCR | 6 weeks |