No, it's not possible to keep it under control. Which is why pedos must be closely monitored and clearly identified as what they are.
Of course they should be monitored, even after being released from prison, but I imagine that there are thousands of potential pedophiles out there right now who have not acted on their impulses.
Pedophilia is not like smoking. The evidence of how often offenders reoffend shows that stopping is not simply a willpower issue.