OHIP is Ontario's health care plan but it does not cover dental care, with the notable exception of some in-hospital dental surgeries (e.g. fracture repairs, tumor removal, reconstructive surgery). Medically necessary tooth removal is also sometimes covered, provided it has prior approval by OHIP.
As you can see, only in very rare situations does OHIP cover anything to do with dental.
If as you say Justin stole Pee Pee's housing plan which was basically to incentivise provinces to eliminate red tape and punish the ones that do not, why isn't he jumping up and down eating an apple screaming that the Libs stole his plan??