Whether you need insurance coverage depends entirely on whether or not you can afford the cost of the risk you are insuring. It sounds like you don't have any current dental problems so you just need to ask yourself that if you were to develop them would the cost be debilitating?
Personally I don't have dental coverage, but dental work where I live is much cheaper (a root canal and crown costs significantly less than $1,000 and people fly from the US to do dental work here because it's cheaper even if they include the flight and a vacation) and no matter how bad the dental problem I am realistically going to have (I may need a wisdom tooth extracted soon) the costs are not debilitating.
But it's up to you how you manage that risk. All insurance is overpayment on the risk on average, after all they make money, so whether it makes sense for you comes down to whether or not you can afford the worse case scenarios of risk that it insures against.
So I would think of what the most expensive problem you are likely to face is and think if you want insurance against that amount of cost coming up on you, if you think it would be debilitating and not something you can save for then insurance might make sense. If you think it would hurt but you can easily absorb the financial cost then insurance would represent a theoretical overpayment on the risk.
Personally I would be fine in the US with no dental insurance, but not with no health insurance. But if I had to pay a couple thousand for dental work that might ruin a few months but would not ruin my life, and the risk is something I can afford.