▁of ▁D ental ▁Support ▁Organ izations ▁( AD SO ). ▁After ▁prede cess or ▁company ▁Up state ▁D ental ▁merged ▁with ▁East ▁Coast ▁D ental ▁in ▁December ▁ 1 9 9 7 , ▁the ▁resulting ▁firm ▁was ▁launched ▁in ▁ 1 9 9 8 ▁as ▁Asp en ▁D ental ▁Management , ▁Inc . ▁ ▁There ▁were ▁more ▁than ▁ 5 0 ▁Asp en ▁D ental ▁offices ▁within ▁five ▁years ▁of ▁AD MI ' s ▁establishment . ▁By ▁April ▁ 2 0 0 7 , ▁there ▁were ▁ 1 0 6 ▁brand ed ▁practices ▁in ▁Arizona , ▁Connecticut , ▁Indiana , ▁Maine , ▁Massachusetts , ▁New ▁Ham pshire , ▁New ▁York , ▁Ohio , ▁Pennsylvania , ▁and ▁Rh ode ▁Island . ▁The ▁company ▁was ▁initially ▁head qu arter ed ▁in ▁Sal ina , ▁New ▁York ▁but ▁moved ▁to ▁a ▁new ▁headquarters ▁near ▁Sy rac use ▁in ▁De W itt ▁in ▁ 2 0 0 6 . ▁The ▁new ▁headquarters ▁includes ▁a ▁training ▁center ▁to ▁c ater ▁to ▁Asp en ▁D ental ▁employees ▁and ▁other ▁fir ms ' ▁training ▁events . ▁ ▁In ▁ 2 0 1 0 , ▁Leonard ▁Green ▁& ▁Part ners ▁purchased ▁Asp en ▁D ental ▁from ▁A res ▁Management ▁for ▁about ▁$ 5 0 0 ▁million . ▁By ▁August ▁ 2 0 1 0 , ▁private ▁equ ity ▁fir ms ▁were ▁b idd ing ▁on ▁Asp en ▁D ental ▁and ▁K ool ▁Sm iles , ▁the ▁two ▁largest ▁national ▁ch ains ▁of ▁dent al ▁offices ▁in ▁the ▁United ▁States . ▁Fin