@article{kusumawardhani_tarman_soegiharto_2021,  title={Difference in Orthodontic Patients’ Perceptions of Essix and Hawley Retainers},  volume={21},  ISSN={1983-4632},  url={https://doi.org/10.1590/pboci.2021.141},  DOI={10.1590/pboci.2021.141},  journal={Pesquisa Brasileira em Odontopediatria e Clínica Integrada},  publisher={Associação de Apoio à Pesquisa em Saúde Bucal},  author={Kusumawardhani, Putri I and Tarman, Krisnawati E and Soegiharto, Benny M},  year={2021},  pages={e6063} }