Evaluation of Maxillary Transverse Arch Dimensions Following Leveling and Alignment with Different Archwire-Bracket Combinations During Fixed Appliance Treatment - A Retrospective Study

Background- Arch expansion is one of the non- extraction methods gaining space. This study aims to assess and compare arch achieved during initial leveling alignment with three different bracket-archwire combinations.
 Material Methods- was a retrospective done in university setup. From available patient information archives, records 30 subjects based on their advocated bracket system were identified categorized into groups. Their pre-treatment (T0) post aligning (T2) 3D model maxillary scans superimposed according reference points marked third palatal rugae using an OrthoAnalyzer software(3 shape version 19.0) changes Intercanine width (ICW), Inter-premolar (IPW) Intermolar (IMW) length. For recorded data, descriptive statistics, One-way ANOVA Tukey HSD hoc analyzed SPSS software. 
 Results- Except for Damon group that showed considerable increase intermolar premolar dimensions, other groups had no statistically significant differences terms width, Interpremolar length.
 Conclusion- Changes transverse dimension noticed among all maximum archwire combination. Although difference between difference, it appreciated clinically relieving dental crowding.