Comparing the efficacy of AI-Based Automatic Speech Recognition (ASR) on Speech Impediment from wearing two types of retainers : Randomized Controlled Trial

Comparison of the effects of using two types of retainers on pronunciation obstacles as measured by intelligence-based automatic voice recognition (Thai language) model: a randomized controlled trial.

Status

Recruiting

Phases

Phase 2

Study type

Interventional

Source

TCTR

Registry ID

TCTR20250915011

Enrollment

Registered

2025-09-15

Start date

2025-10-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

speech impediment in patients wearing retainers after completing orthodontic treatment Artificial intelligence speech impediment clear retainers wraparound retainer automatic speech recognition

Interventions

Wraparound retainer is designed to maintain teeth positions after orthodontic treatment was completed with wire wrapped around the posterior teeth and labial bow to hold anterior teeth. the wires are

Active Comparator Device,Active Comparator Device

wraparound retainer,Clear retainer

Eligibility

Sex/Gender

All

Age

18 Years to 45 Years

Inclusion criteria

Inclusion criteria: 1. Adult 18-45 years old 2. Recently finish orthodontic treatment and going into retention phase 3. Thai Nationality 4. Able to Read and Speak Thai Language

Exclusion criteria

Exclusion criteria: 1. History of severe facial or oral trauma that results in speech impediment. 2. Cleft and craniofacial anomalies 3. Known speech disorders unrelated to orthodontic treatments.

Design outcomes

Primary

Measure	Time frame
speech impediment Baseline (Before Intervention), 1 week / 1 months / 3 months after intervention Word Error Rate (WER), word accuracy (WA), and word recognition rate (WR)	—

Secondary

Measure	Time frame
pain from wearing retainers 1 week / 1 months / 3 months after intervention If any pain, participant report pain score (0-5, 0 equals no pain, 1 - almost not painful, 2 - slightly painful, 3 - moderately painful, 4 - very painful, 5 - most painful),perceived normality of speech 1 week / 1 months / 3 months after intervention participant report yes or no to the question, Can you speak clearly as you would normally or not?	—

Measure

Time frame

pain from wearing retainers 1 week / 1 months / 3 months after intervention If any pain, participant report pain score (0-5, 0 equals no pain, 1 - almost not painful, 2 - slightly painful, 3 - moderately painful, 4 - very painful, 5 - most painful),perceived normality of speech 1 week / 1 months / 3 months after intervention participant report yes or no to the question, Can you speak clearly as you would normally or not?

—

Countries

Thailand

Contacts

Public Contacttirakorn Nanayon

Faculty of Dentistry, Mahidol University

tirakorn74.n@gmail.com0963390279

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 10, 2026