The effects of Class II elastics on masticatory muscles responses

Phase 3

Completed

• Conditions: Healthy adultsClass II malocclusion; Masticatory muscles; masseter muscle; temporal muscle; electromyography; dental occlusion; dentition

• Registration Number: TCTR20200814005
• Lead Sponsor: Graduate School, Prince of Songkla University

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Completion: 2020-07-01
• Study Start: 2020-08-14
• Last Update Posted: 19 August 2024

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 66

Inclusion Criteria

1. Plans to / has been treated with conventional orthodontic treatment
2. Complete dentition (excluding the third molars)
3. Molar class II relationship not exceed 3 mm.
4. Skeletal Class I (ANB = 3º ± 2º), normodivergent pattern (FMA = 23 º ± 4 º)
5. Adult (18-40 years old), able to comply with the protocol

Exclusion Criteria

1. Transverse discrepancies e.g. crossbite, laterognathia
2. Acute dental disease and/or periodontal disease
3. Cuspal-coverage dental restoration
4. Sign and symptom of TMD (according to DC/TMD, 2014112), parafunction habit
5. Cranio-mandibular anomalies
6. Systemic muscle or joint disorder
7. Use neuromuscular-effected medication i.e. muscle relaxant, Botulinum toxin (Botox)

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Masticatory muscle activity Initial, 1 month, 3 months and 6 months Surface electromyography

Secondary Outcome Measures

Name	Time	Method
Occlusal contact area Initial, 1 month, 3 months and 6 months Silicone bite registration