Effects of Anterior Bite Turbos on Deep Bite Treatment and Chewing Muscles

NCT07851948 | Completed

• 1 other identifier: 2025-755
• Study Type: interventional
• Target: 28
• Locations: 1 country
• Sites: 1

Brief Summary

This study evaluated how anterior bite turbos used during orthodontic treatment of deep bite affect chewing muscle activity and dental and skeletal measurements. Participants were followed in two nonrandomized groups: one received anterior bite turbos as part of orthodontic treatment, and the other received orthodontic treatment without bite turbos. Surface electromyography (EMG) was used to measure muscle activity over time. Cephalometric measurements were also evaluated to assess treatment-related changes.

Conditions

Deep Bite Malocclusion

Keywords

Anterior bite turbo; Surface electromyography; Deep overbite; Masticatory muscles; Orthodontic treatment

Outcome Measures

Primary Outcomes (6)

• Change in Mean Bilateral Masseter Muscle Activity at Rest

  Surface electromyographic activity of the right and left masseter muscles was recorded at rest. The mean of the two sides, measured in microvolts (µV), was evaluated at baseline, 1 month, and 6 months. Changes over time were compared between the anterior bite turbo and no bite turbo groups.

  Baseline (before bite turbo placement), 1 month, and 6 months

• Change in Mean Bilateral Anterior Digastric Muscle Activity During Maximum Voluntary Clenching

  Surface EMG amplitude of the right and left anterior digastric muscles during maximum voluntary clenching was averaged for each participant and measured in microvolts (µV). Change over time was compared between groups.

  Baseline (T0), 1 month (T2), and 6 months (T3).

• Change in Mean Bilateral Anterior Digastric Muscle Activity at Rest

  Surface EMG amplitude of the right and left anterior digastric muscles at rest was averaged for each participant and measured in microvolts (µV). Change over time was compared between groups.

  Baseline (T0), 1 month (T2), and 6 months (T3).

• Change in Mean Bilateral Anterior Temporalis Muscle Activity During Maximum Voluntary Clenching

  Surface EMG amplitude of the right and left anterior temporalis muscles during maximum voluntary clenching was averaged for each participant and measured in microvolts (µV). Change over time was compared between groups.

  Baseline (T0), 1 month (T2), and 6 months (T3).

• Change in Mean Bilateral Anterior Temporalis Muscle Activity at Rest

  Surface EMG amplitude of the right and left anterior temporalis muscles at rest was averaged for each participant and measured in microvolts (µV). Change over time was compared between groups.

  Baseline (T0), 1 month (T2), and 6 months (T3).

• Change in Mean Bilateral Masseter Muscle Activity During Maximum Voluntary Clenching

  Surface EMG amplitude of the right and left masseter muscles during maximum voluntary clenching was averaged for each participant and measured in microvolts (µV). Change over time was compared between groups.

  Baseline (T0), 1 month (T2), and 6 months (T3).

Secondary Outcomes (11)

• Change in Overbite

  Baseline and 6 months.

• Change in Overjet

  Baseline and 6 months.

• Change in SN-GoGn Angle

  Baseline and 6 months.

• Change in Overbite

  Baseline and 6 months.

• Change in ANB Angle

  Baseline and 6 months.

Study Arms (2)

Anterior Bite Turbo Group

EXPERIMENTAL

Participants received anterior bite turbos as part of fixed orthodontic treatment for deep bite. Surface EMG and orthodontic measurements were obtained during follow-up.

Device: Anterior Bite Turbo; Procedure: Fixed Orthodontic Treatment

No Bite Turbo Group

ACTIVE COMPARATOR

Participants received fixed orthodontic treatment without anterior bite turbos during the study period. Surface EMG and orthodontic measurements were obtained during follow-up.

Procedure: Fixed Orthodontic Treatment

Interventions

Anterior Bite Turbo DEVICE

Composite resin bite turbos were bonded to the palatal surfaces of the maxillary central incisors during fixed orthodontic treatment. The bite turbos were used to disclude the posterior teeth during deep bite treatment.

Anterior Bite Turbo Group

Fixed Orthodontic Treatment PROCEDURE

Participants received fixed orthodontic treatment for deep bite.

Anterior Bite Turbo Group; No Bite Turbo Group

Eligibility Criteria

• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

• Permanent dentition.
• Angle Class I or Class II malocclusion.
• Mild to moderate dental crowding (≤6 mm).
• Non-extraction fixed orthodontic treatment planned.
• No missing teeth, excluding third molars.
• For the anterior bite turbo group: increased overbite (\>4 mm).
• For the control group: normal anterior overbite (2-3 mm).

You may not qualify if:

• Bruxism or other oral parafunctional habits.
• Temporomandibular joint disorder.
• Craniofacial asymmetry, craniofacial syndrome, or cleft lip and/or palate.
• Dental anomalies, including missing teeth other than third molars or abnormalities of tooth shape.
• Previous orthodontic or myofunctional treatment.

Sponsors & Collaborators

• Ankara University: lead

Study Sites (1)

Ankara University, Faculty of Dentistry, Department of Orthodontics

Ankara, 06560, Turkey (Türkiye)

Location

Related Publications (2)

• Al-Zoubi EM, Al-Nimri KS. A comparative study between the effect of reverse curve of Spee archwires and anterior bite turbos in the treatment of deep overbite cases. Angle Orthod. 2022 Jan 1;92(1):36-44. doi: 10.2319/020921-117.1.

  PMID: 34329389 BACKGROUND

• Wasinwasukul P, Nalamliang N, Pairatchawan N, Thongudomporn U. Effects of anterior bite planes fabricated from acrylic resin and thermoplastic material on masticatory muscle responses and maximum bite force in children with a deep bite: A 6-month randomised controlled trial. J Oral Rehabil. 2022 Oct;49(10):980-992. doi: 10.1111/joor.13351. Epub 2022 Jul 3.

  PMID: 35730261 BACKGROUND

MeSH Terms

Conditions

Overbite

Condition Hierarchy (Ancestors)

Malocclusion, Angle Class II; Malocclusion; Tooth Diseases; Stomatognathic Diseases

Study Officials

• Ayşe T Altuğ Demiralp, DDS, PhD, Professor

  Ankara University Faculty of Dentistry Department of Orthodontics

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Research Assistant

Model Details: Participants were followed in two parallel, nonrandomized groups. One group received anterior bite turbos during orthodontic treatment; the comparison group received orthodontic treatment without anterior bite turbos during the study period.

Study Record Dates

• First Submitted: September 25, 2026
• First Posted: October 1, 2026
• Study Start: October 20, 2025
• Primary Completion: August 28, 2026
• Study Completion: August 28, 2026
• Last Updated: October 1, 2026

Record last verified: 2026-09

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)