The effect of molar intrusion in fixed appliance with temporary anchorage devices vs Clear aligner

Status

Active, not recruiting

Phases

Phase 3

Study type

Interventional

Source

TCTR

Registry ID

TCTR20201218004

Enrollment

Registered

2020-12-18

Start date

2020-09-01

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

Good oral hygiene Healty periodontal status Anterior open bite Clear aligner Molar intrusion Root volume change Skeletal anchorage Skeletal and dental effects Tongue behavior adaptation Tongue thrusting

Interventions

Temporary anchorage devices with NiTi coil spring generate the intrusion force at maxillary molars,Clear aligner with squeezing exercise generate the intrusion force at maxillary molars

Active Comparator Device,Experimental Device

fixed appliance with temporary anchorage devices,Clear aligner

Eligibility

Sex/Gender

All

Age

17 Years to 35 Years

Inclusion criteria

Inclusion criteria: 1. Adult males or females, age range between 18-35 years 2. Dental open bite 0-4 mm (canine to canine) 3. Angle Class I or mild Angle Class II 4. Skeletal Class I or mild Class II (ANB = 0-5 degrees) 5. Normo- to hyperdivergent facial pattern (MPA= 23-39 degrees) 6. Tongue thrust swallowing 7. Good oral hygiene & periodontal status

Exclusion criteria

Exclusion criteria: 1. Severe or moderate crowding 2. History trauma of right and left posterior teeth 3. History of first molar root canal treatment 4. Immunosuppressive drug, inhibited or accelerated tooth movement drug 5. Neuromuscular deficiencies 6. Chronic airway obstruction: adenoiditis, tonsillitis 7. Non-cooperation patients

Design outcomes

Primary

Measure	Time frame
Volumetric root resorption Pre-treatment, 6 month , Post-treatment cone beam computed tomography	—

Secondary

Measure	Time frame
Bite force Pre-treatment, 3 months, 6 months Force sensing sensor,Tongue position at swallowing Pre-treatment and after normal overbite is obtained Payne's technique,Tongue position at rest Pre-treatment and Post-treatment cone beam computed tomography	—

Countries

Thailand

Contacts

Public ContactWisama Withayanukonkij

Faculty of dentistry, Prince of Songkla university

zoroe.won@gmail.com0984598915

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026