Evaluation of the Rate of Anterior Segment Retraction Using Friction Versus Frictionless Mechanics: A Randomized Clinical Trial
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Bimaxillary Protrusion
- Sponsor
- Future University in Egypt
- Enrollment
- 30
- Locations
- 1
- Primary Endpoint
- Rate of Anterior Segment Retraction
- Status
- Completed
- Last Updated
- 4 years ago
Overview
Brief Summary
The rate of anterior segment retraction in bi-maxillary protrusion cases was evaluated comparing the friction and friction-less mechanics. since, there has been a lack of clear cut guidelines for clinicians for the optimum method for retraction, this randomized clinical trial was done.
Detailed Description
Thirty bi-maxillary protrusion female patients were randomly allocated into either intervention groups. In the Friction group, retraction was accomplished using elastomeric power chains extending from crimpable hooks distal to the lateral incisors, on 0.017x0.025-inch Stainless Steel wires, to the mini-screws . While in the friction-less group with retraction done using T- loop springs made of 0.017x0.025-inch titanium molybdenum wires. Retraction force was set to 160g per side in both intervention groups. Activation was done every four weeks. Rate of anterior segment retraction was evaluated via digital models.
Investigators
Monica Guirguis Youssif Tawfik
Principal Investigator
Future University in Egypt
Eligibility Criteria
Inclusion Criteria
- •Female Subjects.
- •Age 13-25 y of age.
- •Skeletal Angle Class I malocclusion with Bimaxillary dentoalveolar protrusion in need of four 1st premolar extractions with maximum anchorage.
- •Fully erupted permanent dentition without crowding.
- •Good oral and general health.
Exclusion Criteria
- •Systemic Diseases or syndromes or on anti-inflammatory medication.
- •Extracted or missing permanent teeth.
- •History of previous Orthodontic Treatment.
- •Parafunctional Habits.
- •Badly decayed teeth.
Outcomes
Primary Outcomes
Rate of Anterior Segment Retraction
Time Frame: The start of anterior segment retraction up to complete space closure, an average of 6 months.
The rate of anterior segment retraction per month was measured on monthly digital models.
Secondary Outcomes
- Anchorage Loss(The start of anterior segment retraction up to complete space closure, an average of 6 months.)
- Pain experienced after each activation of the two mechanics(The start of anterior segment retraction up to complete space closure, an average of 6 months.)