EFFICACY OF VACUUM-GRADIENT THERAPY IN REDUCING ORTHODONTIC TREATMENT TIME [EFFEKT USKORENIYA ORTODONTICHESKOI KORREKTSII ZUBOCHELYUSTNYKH ANOMALII VAKUUM-GRADIENTNOI TERAPIEI] ArticleKosyreva T.F., Biruykov A.S., Voeykova O.V., Davidian O.M.Stomatologiya. Vol. 99. 2020. P.. 69-73