Efficacy of Aligners vs ABT and RCOS for Deep Bite Correction: CBCT Study

NCT07096401 | Not Yet Recruiting

• 1 other identifier: AU-Ortho-DB-2025
• Study Type: interventional
• Target: 27
• Locations: 0 countries
• Sites: N/A

Brief Summary

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.

Conditions

Deep Bite Malocclusion

Outcome Measures

Primary Outcomes (1)

• Change in overbite

  Mean change in overbite (in mm) measured using CBCT imaging

  Baseline and 6 months after treatment start

Study Arms (3)

RCOS Archwire Group

EXPERIMENTAL

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

Device: Reverse Curve of Spee Archwire

Anterior Bite Turbos Group

EXPERIMENTAL

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

Device: Anterior Bite Turbos

Clear Aligners Group

EXPERIMENTAL

Device: Clear Aligners

Interventions

Reverse Curve of Spee Archwire DEVICE

Orthodontic treatment using a 0.016 × 0.022 NiTi reverse curve of Spee archwire to correct deep bite through posterior extrusion and anterior intrusion.

RCOS Archwire Group

Anterior Bite Turbos DEVICE

Orthodontic treatment using anterior bite turbos bonded to the palatal surfaces of the upper central incisors to promote posterior extrusion and correct deep bite.

Anterior Bite Turbos Group

Clear Aligners DEVICE

Orthodontic treatment using clear aligner therapy designed for anterior intrusion and leveling of the curve of Spee to correct deep bite.

Clear Aligners Group

Eligibility Criteria

• Age: 16 Years - 30 Years
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• \- 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.

You may not qualify if:

• Severe skeletal Class II or III requiring surgery.
• Overjet greater than 6 mm.
• Craniofacial anomalies.
• Systemic diseases.

Sponsors & Collaborators

• Al-Azhar University: lead

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: The efficacy of aligner therapy versus two different methods for correction of deep bite cases. cone-beam computed tomography study

Study Record Dates

• First Submitted: July 16, 2025
• First Posted: July 31, 2025
• Study Start: October 1, 2025
• Primary Completion (Estimated): October 1, 2026
• Study Completion (Estimated): October 1, 2027
• Last Updated: August 3, 2025

Record last verified: 2025-07