Efficacy of Invisalign Lite package in the anterior crowding treatment – orthodontist and lay people perception

Vol. 14 – Number 56 – 2021 Digital Dentistry in Science Page 106-112 Efficacy of Invisalign Lite package in the anterior crowding treatment – orthodontist and lay people perception Victor de Miranda Ladewig1 Maiara da Silva Goulart2 Sandra Fausta Almeida de Miranda Ladewig3 Nathalia de Miranda Ladewig4 Renata Rodrigues Almeida Pedrin1 Ana Claudia de Castro Ferreira Conti1 Abstract The aim of the research was to evaluate the efficacy of Invisalign Lite package in mild and moderate anterior crowding treatment from the perspective of orthodontists and lay people. Ten subjects treated with Invisalign Lite were consecutively selected and divided into 2 groups: less than 2mm crowding (mild) and more than from 2mm to 5mm crowding (moderate). Images pre-and post-treatment of each subject were obtained from digital cast and randomly arranged in a Power Point presentation. The evaluation was performed by 109 individuals divided into 2 groups: orthodontists and lay people. They were asked to assign a score for teeth alignment from 1 (poor) to 5 (excellent). Also, the evaluators had to answer for each of the images, if in their opinion orthodontic treatment was necessary. In all groups the Kolmogorov-Smirnov normality test was performed. Paired t-test and non-parametric Wilcoxon test were used for paired comparison. The independent t-test and non-parametric Mann-Whintney were used for comparing evaluators groups and the amount of crowding. In all tests a 5% (p<0,05) significance level was adopted. For the orthodontists, alignment evaluation increased from 2,85 to 4,13 after orthodontic treatment. The scores assigned by lay people increased from 2,54 to 3,69. Orthodontists pointed out that they would indicate orthodontic treatment for 11,15% of the post-treatment images. For lay people, orthodontic treatment would be necessary for 35,63% of post-treatment images. Descriptors: Removable orthodontic appliances, tooth movement techniques, computer-aided design, clear aligners. 1 North Paraná University, Orthodontics – Londrina – PR – Brazil. 2 Sagrado Coração University Center, Postgraduate – Bauru – São Paulo – Brazil. 3 Private practice – Recife – PE – Brazil. 4 Brazilian University Center, Undergraduate – Recife – PE – Brazil. DOI: 10.24077/2021;1456-106112