RCT Comparing Invisalign and Traditional Orthodontic Treatment

A Randomized Controlled Trial Comparing the Effectiveness of Invisalign and Traditional Orthodontic Treatments

Comparison of orthodontic patients treated with aligners and traditional (clear braces)

Patients were selected based on being adults and having mild Class I malocclusion. They were randomly allocated into either the aligner group and the traditiona (clear braces group).. The aligner group was treated with invisalign, with up to two adjustments at the end of treatment. The traditional group had clear braces placed on their teeth. The outcome variables including the following: 1) pain and discomfort related to treatment, 2) posttreatment occlusal status, and 3) postretention occlusal status.

Inclusion Criteria:

1. Class I molar and canine relationships
2. Non-extraction treatments
3. Mandibular crowding of 4 mm or less
4. No missing tooth (from second to second molar)

Exclusion Criteria:

1. Anterior or posterior crossbites
2. Anterior or lateral open bites
3. Maxillary overjet exceeding 3mm
4. Impacted tooth