Figure 2From: Comparing the effectiveness of the 0.018-inch versus the 0.022-inch bracket slot system in orthodontic treatment: study protocol for a randomized controlled trial Trial key steps diagram. Showing the pre-treatment, mid-treatment and end of treatment records collected. Smile better questionnaire is completed by the study participants with regards to their experience wearing the fixed appliances. Index of Orthodontic Treatment Need Aesthetic Component (IOTN AC), Orthopantomograph (OPT).Back to article page