The purpose of this study was to assessment of maxillary and mandibular dental arches dimensions in Down's Syndrome children (8-10) years using digital study models.
Materials and Methods: The study sample consisted of 30 patients (8-10) years, divided into two groups (Down's Syndrome Children Group) and (Control Group), each group consisted of 15 patients, after impressions were taken by putty impression materials, they casted and the study models have been prepared, then the plaster models have been scanned by the scanner (Identica Hybrid scanner), and obtained the digital dental models for all patients. 3Shape Software was used to view and measure these digital models. Maxillary and mandibular dental arches dimensions were measured (Intercanine width, intermolar width, dental arch length, dental arch depth), and the extracted data were analyzed using (Independent-Samples T-Test) by SPSS® v.20.
Results: this study shows statistically significant differences between the two groups in all maxillary and mandibular dental arches dimensions (P <0.05) except (mandibular dental arch length, mandibular dental arch depth) where this study didn't find any statistically significant differences between the two groups.
Conclusions: Based on this study, we found that the measurements of maxillary and mandibular dental arch dimensions were statistically smaller in down's syndrome children.