▁season , ▁they ▁were ▁assigned ▁to ▁the ▁ 2 0 0 6 ▁World ▁Championships ▁after ▁Tat iana ▁Tot m ian ina ▁/ ▁Maxim ▁Mar in in ▁with d rew . ▁They ▁placed ▁ 1 2 th ▁in ▁their ▁debut ▁at ▁the ▁event . ▁ ▁After ▁the ▁ 2 0 0 5 – 0 6 ▁season , ▁M uk h ort ova ▁and ▁T ran kov ▁switched ▁coach es ▁to ▁Tam ara ▁Mosk v ina . ▁In ▁August ▁ 2 0 0 6 , ▁Art ur ▁D mit rie v ▁became ▁their ▁coach ▁and ▁in ▁December ▁ 2 0 0 6 ▁they ▁moved ▁to ▁O leg ▁Vas il iev . ▁ ▁In ▁the ▁ 2 0 0 6 – 0 7 ▁season , ▁M uk h ort ova ▁and ▁T ran kov ▁won ▁the ▁ 2 0 0 7 ▁Russian ▁National s , ▁but ▁were ▁forced ▁to ▁miss ▁the ▁Europe ans ▁after ▁she ▁suffered ▁an ▁injury ▁in ▁practice . ▁They ▁returned ▁in ▁time ▁for ▁the ▁ 2 0 0 7 ▁World s , ▁moving ▁up ▁one ▁place ▁to ▁ 1 1 th . ▁The ▁following ▁season , ▁they ▁won ▁the ▁silver ▁medal ▁at ▁the ▁ 2 0 0 8 ▁Europe ans ▁and ▁finished ▁ 7 th ▁at ▁the ▁ 2 0 0 8 ▁World s . ▁They ▁had ▁to ▁take ▁a ▁short ▁break ▁in ▁the ▁middle ▁of ▁their ▁long ▁program ▁at ▁World s ▁because ▁T ran kov ▁was ▁suffering ▁from ▁sw elling ▁in ▁his ▁arm , ▁but ▁returned ▁to ▁complete ▁their ▁sk ate ▁after