PEEK vs. MBSS - Retrospective

A comparison of Poly-Ether-Ether-Ketone (PEEK) retainers versus Multi-Braided Stainless-Steel retainers: A retrospective Cohort Study - A comparison of Poly-Ether-Ether-Ketone (PEEK) retainers versus Multi-Braided Stainless-Steel retainers: A retrospective Cohort Study

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

NL-OMON

Registry ID

NL-OMON58355

Enrollment

900

Registered

2026-02-03

Start date

2023-10-16

Completion date

Unknown

Last updated

2026-03-16

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

Conditions

Malocclusion Crooked Teeth

Interventions

Fixed Poly-Ether-Ether-Ketone and Multi-Braided Stainless-Steel orthodontic retention wires

Eligibility

Inclusion criteria

Inclusion criteria: Patients who had completed orthodontic treatment between 2019 and 2024.

Exclusion criteria

Exclusion criteria: Patients presenting with congenital or anatomical dental or periodontal abnormalities were excluded. 

Design outcomes

Primary

Measure	Time frame
The primary outcome of interest was time to failure, defined as the duration in months between retainer placement in the upper and lower jaw until the occurrence of failure. Failure was defined at the patient level: a patient was considered failed if at least one of the retainers required clinical intervention after debonding or fracture. Only the first failure event per patient was included in the analysis. Patients who did not experience failure during follow-up were censored at the date of last contact.	—

Measure

Time frame

The primary outcome of interest was time to failure, defined as the duration in months between retainer placement in the upper and lower jaw until the occurrence of failure. Failure was defined at the patient level: a patient was considered failed if at least one of the retainers required clinical intervention after debonding or fracture. Only the first failure event per patient was included in the analysis. Patients who did not experience failure during follow-up were censored at the date of last contact.

—

Secondary

Measure	Time frame
-	—

Countries

Netherlands

Contacts

Public ContactEM Kramer

Radboud Universiteit Nijmegen

sterre.kramer@radboudumc.nl0648213164

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP) · Data processed: Mar 20, 2026