Evaluation of Efficiancy of the aligner therapy by 3d-analysis of the tooth movement during the treatment with removable PET-G aligners.

Status

Active, not recruiting

Phases

Phase 4

Study type

Interventional

Source

DRKS

Registry ID

DRKS00013334

Enrollment

Registered

2018-06-08

Start date

2018-08-01

Completion date

Unknown

Last updated

2025-04-07

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

Conditions

K07.3

Interventions

Group 1: Aligner therapy with the conventional sequence 0.5/0.625./0.75 Group 2: Aligner therapy with the ulmer sequence 0.4/0.5/0.75 Group 3: Aligner therapy with only one foil thickness (0.75) and

Eligibility

Sex/Gender

All

Age

18 Years to 40 Years

Inclusion criteria

Inclusion criteria: -Completely erupted permanent teeth 1 – 6 -Anterior crowding of up to 3 mm -No extractions -Indicated aligner therapy -Good compliance and oral hygiene -Voluntary readiness to undergo an impression taking or an intraoral scan every 7 – 10 days -No contraindication for x-ray radiographs

Exclusion criteria

Exclusion criteria: Anterior crowding of more than 3 mm Signs of pronunced root resorption

Design outcomes

Primary

Measure	Time frame
Amount of tooth movement Parameter: The tooth position will be determined on each of the 3D models. The achieved 3D tooth position will be compared with the initially planned tooth position. When: after completing the treatment	—

Secondary

Measure	Time frame
Amount of tooth resorption Parameter: Panorama x-rays at the beginning and the end of the treatment When: after completing the treatment Uniformity of tooth movement Parameter: The tooth position will be determined on each of the intermediate 3D models. In this manner the tooth position within each aligner change within the same setup step can be separately evaluated. When: After each aligner change. Wearing duration Parameter: The wearing duration will be documented by the patient in a special wearing card. When: during the wearing period of each aligner Amount of the pressure on the teeth Parameter: The amount of the pressure on each tooth will be documented by the patient on a visual ordinal scale. When: during the wearing period of each aligner	—

Measure

Time frame

Amount of tooth resorption Parameter: Panorama x-rays at the beginning and the end of the treatment When: after completing the treatment Uniformity of tooth movement Parameter: The tooth position will be determined on each of the intermediate 3D models. In this manner the tooth position within each aligner change within the same setup step can be separately evaluated. When: After each aligner change. Wearing duration Parameter: The wearing duration will be documented by the patient in a special wearing card. When: during the wearing period of each aligner Amount of the pressure on the teeth Parameter: The amount of the pressure on each tooth will be documented by the patient on a visual ordinal scale. When: during the wearing period of each aligner

—

Countries

Germany

Contacts

Public ContactFayez Elkholy

Klinik für Kieferorthopädie und OrthodontieUniversitätsklinik Ulm

fayez.elkholy@uniklinik-ulm.de073150064437

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026