Evaluation of the Rate of Anterior Segment Retraction Using Two Types of Mechanics

N/ACompletedNCT04892056

Future University in Egypt30 enrolled

Overview

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.

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

OTHER

Masking

SINGLE

Enrollment

Conditions

Bimaxillary Protrusion

Interventions

Friction MechanicsOTHER

anterior segment retraction using elastomeric power chains

Frictionless MechanicsOTHER

anterior segment retraction using closing loops

Eligibility

Sex: FEMALEMin age: 13 YearsMax age: 25 YearsHealthy volunteers:

Medical Language ↔ Plain English

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.

Locations (1)

Future Univeristy in Egypt

Cairo, Egypt

Outcomes

Primary Outcomes

Rate of Anterior Segment Retraction

The rate of anterior segment retraction per month was measured on monthly digital models.

Time frame: The start of anterior segment retraction up to complete space closure, an average of 6 months.

Secondary Outcomes

Anchorage Loss

Mesial movement of the first primary molar was evaluated on the digital models

Time frame: 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

Patients were asked to complete Visual Analogue Scales of the degree of pain after every intervention. The scale values between 0 to 10, with 0 being no pain experienced by the patient and 10 being the highest level of pain experienced.

Time frame: The start of anterior segment retraction up to complete space closure, an average of 6 months.

Data from ClinicalTrials.gov

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