"Comparing the effectiveness, acceptability and oral hygiene status between vacuum formed retainer and Begg's retainer": a pilot study.

Background: Recently, Vacuum formed retainers (VFRs) are preferred as an Orthodontic retention appliance over conventional Begg's retainers. Very few studies have been conducted between VFRs and Begg's retainers. Hence, this study aims at assessing the effectiveness, oral hygiene and acceptability between VFRs and Begg's retainers with a follow up period of 1 year.

Comparative evaluation of transpalatal arch and vertical holding appliance at different heights.

Objectives: An effective method for controlling vertical dysplasia remains a concern for orthodontists. This study aims to compare the stresses on the maxillary first molars while changing the height of the loop/acrylic pad of the transpalatal arch (TPA) and vertical holding appliance (VHA) during swallowing using finite element analysis.

Methods: Head and neck computed tomography (CT) of a patient with levelled and aligned maxillary teeth was taken for a three-dimensional reconstruction.