Efficacy of Aligners vs ABT and RCOS for Deep Bite Correction: CBCT Study (DB-CBCT)

Al-Azhar University

Status: Not yet enrolling

Conditions: Deep Bite Malocclusion

Treatments: Device: Anterior Bite Turbos; Device: Clear Aligners; Device: Reverse Curve of Spee Archwire

Study type: Interventional

Funder types: Other

Identifiers

NCT07096401

AU-Ortho-DB-2025

Details and patient eligibility

About

This prospective clinical trial aims to evaluate the efficacy of clear aligner therapy compared to two different treatment modalities - anterior bite turbos and reverse curve of Spee (RCOS) archwires - for the correction of dental deep bite cases. Deep bite malocclusion is characterized by excessive vertical overlap of the anterior teeth and often requires intrusion of anterior teeth and leveling of the curve of Spee.

In this study, 27 patients aged 16-30 years with an overbite ≥5 mm and no significant skeletal discrepancies will be randomly assigned into three equal groups: Group 1 (RCOS archwire), Group 2 (anterior bite turbos), and Group 3 (clear aligners).

Cone-beam computed tomography (CBCT) will be used to assess changes in overbite and alveolar bone height and thickness before and after treatment. The primary outcome is the efficacy of overbite correction, and the secondary outcome is the assessment of alveolar bone remodeling.

The study will be conducted at the Department of Orthodontics, Faculty of Dental Medicine, Al-Azhar University (Assiut Branch), and has been approved by the institutional ethical committee.

Enrollment: 27 estimated patients

Sex: All

Ages: 16 to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Age between 16 and 30 years.

Overbite of 5 mm or more.

Full permanent dentition (excluding third molars).

Good oral hygiene.

No previous orthodontic or orthognathic treatment.

Exclusion criteria

• Severe skeletal Class II or III requiring surgery.

Overjet greater than 6 mm.

Craniofacial anomalies.

Systemic diseases.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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27 participants in 3 patient groups

RCOS Archwire Group

Experimental group

Description:

Patients treated with reverse curve of Spee archwire (0.016 × 0.022 NiTi) to correct deep bite via posterior extrusion and anterior intrusion.

Treatment:

Device: Reverse Curve of Spee Archwire

Anterior Bite Turbos Group

Experimental group

Description:

Patients treated with anterior bite turbos bonded to the palatal surface of upper central incisors to correct deep bite.

Treatment:

Device: Anterior Bite Turbos

Clear Aligners Group

Experimental group

Treatment:

Device: Clear Aligners