Impact of Gingival Crevicular Fluid microRNAs on Orthodontic Tooth Movement

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.

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.