Comparison of two types of retainers used after orthodontics treatment in terms of survival time and patient satisfaction

Comparison of survival time and satisfaction of Hawley and Vacuum-formed retainers in orthodontic patients – a randomized clinical trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT2016022926836N1

Enrollment

105

Registered

2016-04-29

Start date

2016-05-04

Completion date

Unknown

Last updated

2018-02-22

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

Conditions

survival time and patient satisfaction from used retainers.

Interventions

Intervention 1: first intervention group: use Hawley retainer in upper arch. Intervention 2: second intervention group: use Vacuum-formed retainers with 1 mm thickness in upper arch. Intervention 3: t

Prevention

first intervention group: use Hawley retainer in upper arch

second intervention group: use Vacuum-formed retainers with 1 mm thickness in upper arch

third intervention group: use Vacuum-formed retainers with 1.5 mm thickness in upper arch

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: inclusion criteria: orthodontic treatment in an optimal occlusion; indication of use removable retainer; patients filling to participate in the study exclusion criteria: prosthetic treatment of missing teeth; bruxism; syndromic disease (cleft lip & palate, hemifacial microsomia); alergy to acrylic resins; TMD; oral habits; maxillary expansion treatment; early debonding; generalized spacing

Exclusion criteria

Exclusion criteria:

Design outcomes

Primary

Measure	Time frame
Patient satisfaction of Hawley and Vacuum-formed retainers. Timepoint: 1,3,6 months after debonding. Method of measurement: questionair.;Survival time of Hawley and Vacuume-formed retainers. Timepoint: 1,3,6 months after debonding. Method of measurement: clinical evaluation of retainers for fracture.	—

Secondary

Measure	Time frame
Crack, color change , retainer lost, fittness. Timepoint: 1,3,6 months after debonding. Method of measurement: clinical evaluation.	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactDr. Somaye Rahmanian

Tabriz Faculty of Dentistry

somaieh.rahmanian93@gmail+98 41 3335 0061

Outcome results

None listed

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