White spot lesion in orthodontic patients: formation, prevention and treatment - Gavrilovikj I., Bogdanovska B., Kjurchieva Chuchkova G., Kanurkova L., Daskalova B. (3rd Congress of Balkan Association of Orthodontic Specialists (BAOS) and 4th Congress of Macedonian Orthodontic Society (MOS),2019, 2019)