The Clinical Evaluation of Two Different Film Thicknesses of Clear Overlay Retainer.

Yafen Zhu

Status: Completed

Conditions: Retention

Treatments: Device: retainer

Study type: Interventional

Funder types: Other

Identifiers

NCT02618330

WCHSIRB-ST-2013-094

Details and patient eligibility

About

The aims of this study were to compare health related quality of life, comforts degrees，retention effectiveness, and failure rates as well as survival times between two clear overlay retainers with different thicknesses, thus to provide basis information regarding appropriate selections of the thickness of clear overlay retainers.

Enrollment: 80 patients

Sex: All

Ages: 12+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients after active orthodontic treatment;
• Must be healthy without systemic and oral diseases;
• The central incisors, canines and first molars of both upper and lower arches must be existed;
• Agreed to the trial and signed informed consent forms, either by themselves, or their parents.

Exclusion criteria

• Oral habits such as bruxism and clenching,
• Do not accept this type of retainers

Trial design

Primary purpose: Supportive Care

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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80 participants in 2 patient groups

retainer: 0.75-mm-thick film

Experimental group

Treatment:

Device: retainer

retainer: 1.00-mm-thick film

Experimental group

Treatment:

Device: retainer