Evaluation of Profile Changes and Torque Control in Dental Bimaxillary Proclination Cases Using Lingual Lever Arm Mechanics vs Conventional Lingual Orthodontic Mechanics A Randomized Controlled Trial

Not Applicable

• Conditions: Bimaxillary Proclination
• Interventions: Procedure: Lingual orthodontics

• Registration Number: NCT03579745
• Lead Sponsor: Cairo University

Brief Summary

This study evaluates the profile changes and torque control using lingual lever arm vs conventional lingual mechanics. Half of the patients will receive lever arms and the other half will receive conventional lingual orthodontics.

Detailed Description

Conventional lingual orthodontic biomechanics leads to torque loss during en masse retraction of the anterior segment in the bimaxillary proclination cases treated by first premolar extraction. Torque loss affects the final outcome of the treatment negatively.

Adding a lever arm to the lingual wire will transmit the point of force application at or apical to the center of rotation which will reduce or eliminate toqrue loss during anterior segment retraction.

Study Timeline

• Status Verified: 2018-06
• Study First Submitted: 2018-06-26
• Study First Submitted QC: 2018-06-26
• Last Update Submitted: 2018-06-26
• Study First Posted: 2018-07-09
• Last Update Posted: 2018-07-09
• Study Start: 2018-10
• Primary Completion: 2019-11
• Study Completion: 2020-06

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 24

Inclusion Criteria

• Male or female adult patients with age range 18-30 yrs old.
• Class I bimaxillary dentoalveolar proclination.
• Full permanent dentition.
• Good oral hygiene.
• Maximum anchorage is required.
• Healthy bone around the first molars is needed.

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Exclusion Criteria

.Systemic disease.

• Severe crowding.
• Extracted or missing upper permanent tooth/teeth (except for third molars).
• Signs, symptoms or previous history of temporomandibular disorders (TMD).
• Previous orthodontic treatment.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Lever arm lingual mechanics	Lingual orthodontics	-
Conventional lingual mechanics	Lingual orthodontics	-

Primary Outcome Measures

Name	Time	Method
Nasolabial angle	12 months	Soft tissue lateral cephalometric radiograph measurement
Profile convexity reduction	12 months	N'-sn -Pog' soft tissue angle

Secondary Outcome Measures

Name	Time	Method
Torque control	12 months	U1 - Palatal plane angle