Bimaxillary Protrusion
Conditions
Keywords
En-masse Retraction, Friction, Fricitionless, Lateral Cephalometric, Rate, Dental Models
Brief summary
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.
Detailed description
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.
Interventions
PROCEDUREPower chain and Crimpable hook for En-Masse Retraction
Retraction will start on a 0.017x0.025 Stainless steel wire using elastomeric chain (force applied will be 212 g per side) extending between the crimpable hooks and the miniscrew
PROCEDURET- Loop
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
Sponsors
Future University in Egypt
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Masking description
Only the outcome assessors will be blind. The patients name will be sealed from pre and post radiographs and study models. Then two assessors will carry out, blindly and independently, the measurements and analysis of the study
Eligibility
Sex/Gender
ALL
Age
14 Years to 24 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Retraction Rate | From pre to post retraction (an average of 6 - 8 months) | 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) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Anchorage Loss | From pre to post retraction (an average of 6 - 8 months) | 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) |
| Molar Rotation | From pre to post retraction (an average of 6 - 8 months) | 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) |
| Pain of intervention | From pre to post retraction/intervention (an average of 6 - 8 months) | Each patient will fill a questionnaire regarding his treatment experience in a VAS scoring from 1-10 |
| Anterior teeth torque, extrusion/intrusion | From pre to post retraction (an average of 6 - 8 months) | The principle investigator will examine pre and post lateral cephalometric radiographs in relation to lines and reference planes (measurements in degrees and mm) |
Countries
Egypt
Outcome results
None listed