Evaluation of Mini and Macro-esthetics Following En- Masse Retraction Versus Two Step Retraction

Future University in Egypt30 enrolled

Overview

There's a scarcity in literature concerning mini-esthetics specially maxillary gingival display changes following en-masse retraction and two-step retraction. The purpose of this study is to determine, In orthodontic patients with maxillary protrusion, which technique of retraction will result in better esthetics upon smiling following en-masse retraction or two step retraction mechanics.

This study will be conducted in order to evaluate which technique of retraction will provide better outcome regarding mini and macro esthetics. In terms of mini esthetics, posed smiles will be analyzed to evaluate maxillary gingival display, as well as the analysis of smile arc, buccal corridor, inter-labial gap. In terms of macro esthetics, frontal and profile poses will be assessed to evaluate the nasolabial angle, mentolabial angle and upper and lower lip protrusion/ E- plane.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Bimaxillary Protrusion

Interventions

En-masse retractionPROCEDURE

Power chain and Crimpable hook for En-Masse Retraction Retraction will start on a 0.017"x0.025" Stainless steel wire using elastomeric chain (force applied will be 200 g per side) extending between the crimpable hooks and the miniscrew

Two step RetractionPROCEDURE

Retraction of canine started on a 0.017"x0.025" Stainless steel wire using elastomeric chain (force applied will be 150 g per side)followed by anterior teeth retraction on 0.017"x0.025" Stainless steel wire using elastomeric chain (force applied will be 160 g per side) extending between the crimpable hooks and the mini-screw.

Eligibility

Sex: ALLMin age: 16 YearsMax age: 24 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Adults and Adolescent patients (both genders) * Age range (16-24) * Patients with maxillary protrusion requiring first premolars extraction (Bimaxillary Protrusion or Class II division 1 cases). * Patients with fully erupted permanent teeth (not necessarily including the third molar). * Cases requiring maximum anchorage during retraction. * Good general and oral health Exclusion Criteria: * Patients suffering from any neural disorders or systemic diseases interfering with tooth movement. * Patients with soft tissue problems such as cleft-palate patients * Patients with extracted or missing permanent teeth. (except for third molars). * Patients with badly decayed teeth. * Patients with any parafunctional habits (i.e. Bruxism, tongue thrusting, mouth breathing, etc....). * Patients with previous orthodontic treatment.

Locations (1)

Future University In Egypt

Cairo, Egypt

Outcomes

Primary Outcomes

Mini-esthetics including

Evaluation of (maxillary gingival display, Smile arc, buccal corridor) from social smile photograph Evaluation of (inter-labial gap) from At Rest photograph All primary outcome characteristics will be measured before and after retraction (measured Linear/ horizontal/ vertical in millimeters) by Adobe Photoshop CC 2017 software.

Time frame: From pre to post retraction (an average of 6 - 8 months)]

Secondary Outcomes

Macro-esthetics evaluation of profile photograph including

1\. Nasolabial angle. 2. Mentolabial angle. 3. Incisors Inclination (Angular measurement in degrees). 4. Upper lip protrusion/ E- plane. 5. Lower lip protrusion/ E- plane. (Linear measurement in millimeters.) Cephalometric radiographs and Adobe Photoshop CC 2017 software

Time frame: upto 6 months from the start of orthodontic treatment.

Data from ClinicalTrials.gov

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