The comparison of treatment results of two types of retainers after orthodontic treatment.

Comparison of orthodontic treatment results stability and gingival health between Hawley and vacum-formed retainers : randomized clinical trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT2017021722951N3

Enrollment

Registered

2017-04-28

Start date

2017-02-19

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

Condition 1: Gingival Health. Condition 2: orthodontic treatment stability. Disorders of tooth development and eruption Disorders of tooth development and eruption

Interventions

Intervention 1: The patients of first group(Intervention) will receive Hawley retainer. Intervention 2: The patients of third group(Intervention) will receive vacuum-formed with a thickness of 1.5 mm

The patients of first group(Intervention) will receive Hawley retainer

The patients of third group(Intervention) will receive vacuum-formed with a thickness of 1.5 mm retainer.

The patients of second group(Intervention) will receive vacuum-formed retainer with a thickness of 1 mm

Eligibility

Sex/Gender

All

Age

18 Years to 30 Years

Inclusion criteria

Inclusion criteria: Inclusion criteria: completion of orthodontic treatment in a proper occlusion; indication of removable retainer. Exclusion criteria: The absence of several teeth and the need to replace them with prosthesis; patients with bruxism; syndromic disease (lip and palate clefts, hemi-facial microsomia); patients with allergy to acrylic resin; patients with temporomandibular joint problems.

Exclusion criteria

Exclusion criteria:

Design outcomes

Primary

Measure	Time frame
Gingival Index. Timepoint: before retainer delivery and six months after delivery. Method of measurement: check list.;Objective grading system method. Timepoint: before retainer delivery and six months after delivery. Method of measurement: check list.	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactDR. Somayye Farshidnia

Tabriz University of Medical Sciences

milad.ghanizadeh@gmail.com+98 41 3335 9680

Outcome results

None listed

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