Evaluation of the Rate of En-masse Retraction in Orthodontic Patients With Maxillary Protrusion

Future University in Egypt30 enrolled

Overview

There's a scarcity in literature concerning en-masse retraction and its effect on the rate of tooth movement. The purpose of this study is to determine, In orthodontic patients with maxillary protrusion, which form of mechanics in en-masse retraction offers a faster rate of retraction; Friction or Frictionless Mechanics.

The en-masse technique can be done in one of two ways: through friction or frictionless mechanics. Both are viable options, but, ideally, we want to retract and complete the orthodontic treatment as quickly as possible, in order to decrease the negative effects that may occur during treatment. Which of these mechanics results in a decreased treatment time is still up for debate.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Bimaxillary Protrusion

Interventions

Power chain and Crimpable hook for En-Masse RetractionPROCEDURE

Retraction will start on a 0.017"x0.025" Stainless steel wire using elastomeric chain (force applied will be 212 g per side) extending between the crimpable hooks and the miniscrew

T- LoopPROCEDURE

Closing retraction T-loops will be fabricated using 0.017 x 0.025 TMA wire. The loop will be positioned halfway the extraction space and the canine

Eligibility

Sex: ALLMin age: 14 YearsMax age: 24 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Adults and Adolescent patients (both genders) * Age range (14-24) * 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 systemic diseases interfering with tooth movement. * 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

New Cairo, Cairo Governorate, Egypt

Outcomes

Primary Outcomes

Retraction Rate

The antero-posterior movement of anterior teeth and first molars will be assessed by measuring the digitilized study models taken of the patients monthly (measured in mm)

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

Secondary Outcomes

Anchorage Loss

Digitilized dental models taken before and after the completion of retraction will be measured by identifying landmarks and reference lines and planes (measured in mm)

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

Molar Rotation

Study models that are taken pre and post retraction (then digitilized) will be used to assess the rotation of the maxillary first molars in relation to a reference line (measurement of the angles in degrees)

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

Pain of intervention

Each patient will fill a questionnaire regarding his treatment experience in a VAS scoring from 1-10

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

Anterior teeth torque, extrusion/intrusion

The principle investigator will examine pre and post lateral cephalometric radiographs in relation to lines and reference planes (measurements in degrees and mm)

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

Data from ClinicalTrials.gov

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