Nickel-titanium 3x3 retainer: A prospective, comparative study about clinical implication, stability and limitation

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00032319

Enrollment

Registered

2023-07-19

Start date

2021-07-12

Completion date

Unknown

Last updated

2025-10-06

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: Non-interventional study: Patients decide by their own choice to recieve or not to recieve fixed retainers at the end of active orthodontic treatment. Patient with fixed retainers serve as s

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: periodontal health (PSI<3), upper (13-23) and/or lower front teeth (33-43) in place

Exclusion criteria

Exclusion criteria: missing frontal teeth, traumatic injury of frontal teeth during the study period, nickel allergies (for study group)

Design outcomes

Primary

Measure	Time frame
Intra-oral scans are performed directly after active orthodontic treatment (T1), 6 months (T2) and 12 months (T3) later.	—

Countries

Germany

Contacts

Public ContactHannah Finke

Universitätsklinikum Tübingen, Poliklinik für Kieferorthopädie

hannah.finke@med.uni-tuebingen.de+4970712980961

Outcome results

None listed

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