Generally speaking, DHMO plans are more cost effective, while PPO dental plans offer greater flexibility. There's no way of saying that one plan is better than the other – it just comes down to which will meet your unique needs.
Which is better HMO or PPO?
Generally speaking, an HMO might make sense if lower costs are most important and if you don't mind using a PCP to manage your care. A PPO may be better if you already have a doctor or medical team that you want to keep but doesn't belong to your plan network.