NCT04902456

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

Evaluation of the Anchorage Loss During En-masse Retraction in Orthodontic Patients With Maxillary Protrusion Using Friction Versus Frictionless Mechanics: A Randomized Clinical Trial

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (actual)
• Sponsor: Future University in Egypt · Academic / Other
• Sex: All
• Age: 14 Years – 24 Years
• Healthy volunteers: Accepted

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

Interventions

Type	Name	Description
PROCEDURE	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
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.

Timeline

• Start date: 2020-12-29
• Primary completion: 2022-01-29
• Completion: 2022-01-29
• First posted: 2021-05-26
• Last updated: 2021-06-11

Locations

1 site across 1 country: Egypt