Evaluation of the Anchorage Loss During En-masse Retraction in Orthodontic Patients With Maxillary Protrusion

NCT ID: NCT04902456

Last Updated: 2021-06-11

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 30 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2020-12-29
• Study Completion Date: 2022-01-29

Brief Summary

There is scarcity in literature regarding the effectiveness of friction and frictionless mechanics during ''En-masse retraction''technique on anchorage loss of posterior segment in orthodontic patients with maxillary protrusion. Moreover there is deficiency in studies measuring the patient pain and satisfaction regarding the different techniques of retraction.

The aim of the current study is to evaluate the effects of friction versus frictionless mechanics, implemented during "En-masse retraction", on anchorage loss. Additionally, assessment of both techniques regarding their rates, effects on root resorption as well as patient satisfaction.

Detailed Description

One of the most common complaints of orthodontic patients is proclination of anterior teeth where there is an increase in facial convexity and as well as incompetent lips. Bimaxillary dentoalveolar protrusion and class II division I cases always have this appearance. Frequently this situation requires extraction of the first premolars followed by fixed orthodontic appliance for space closure and retraction of anterior teeth. Different techniques are used including "Two-step retraction" where canines are retracted as a first step followed by anterior four incisors as a second step and "En-masse retraction" where anterior teeth are retracted as one unit. However, the method of "En-masse retraction" is controversial - whether to use frictionless or friction mechanics.

Conditions

Bimaxillary Protrusion

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: SINGLE

Study Groups

Power 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

Group Type: EXPERIMENTAL

Power chain and Crimpable hook fro En-masse Retraction

Intervention Type: PROCEDURE

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

T-loop

Closing retraction T-loops will be fabricated using 0.017x0.025" TMA wire. The loop will be positioned halfway the extraction space and the canine.

Group Type: EXPERIMENTAL

T-loop

Intervention Type: PROCEDURE

closing retraction T-loops will be fabricated using 0.017x0.025 TMA wire. The loop will be positioned halfway the extraction space and the canine.

Interventions

Power chain and Crimpable hook fro En-masse Retraction

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

Intervention Type: PROCEDURE

T-loop

closing retraction T-loops will be fabricated using 0.017x0.025 TMA wire. The loop will be positioned halfway the extraction space and the canine.

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

1. Orthodontic patients (both genders)

2. Age range (14-24)

3. Patients requiring 1st premolars extraction followed by ''En-masse retraction'' (Bimaxillary Protrusion or Class II division 1 cases).

4. Patients with fully erupted permanent teeth (not necessarily including the 3rd molar).

5. Cases requiring maximum anchorage during anterior segment retraction.

6. Cases with minimal crowding (2-3) mm

Exclusion Criteria

1. Patients suffering from any systemic diseases interfering with tooth movement.

2. Patients with extracted or missing permanent teeth. (except for third molars).

3. Patients with badly decayed teeth.

4. Patients with any parafunctional habits (i.e. Bruxism, tongue thrusting, mouth breathing, etc....).

5. Patients with previous orthodontic treatment

• Minimum Eligible Age: 14 Years
• Maximum Eligible Age: 24 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Future University in Egypt

OTHER

Sponsor Role: lead

Responsible Party

Amr Mahmoud Attia

Principle Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Yehia Mostafa, Professor and Chairman

Role: STUDY_DIRECTOR

Future University in Egypt

Locations

Amr Attia

Cairo, Future University in Egypt, Egypt

Countries

Egypt

Provided Documents

Document Type: Study Protocol

View Document

Document Type: Informed Consent Form

View Document

Other Identifiers

FUE.REC (13)/7-2019

Identifier Type: -

Identifier Source: org_study_id