Benefits of pre-orthodontic treatment using myofunctional appliances - Gabriela Kjurchieva Chuchkova, Elena Petrova, Cvetanka Bajraktarova Mishevska, Irena Gavrilovikj, Marija Maneva Ristovska (98-th Congress of Europian Orthodontic society, Oslo, Norway (poster presentation) 2023, 2023)