What are some procedures that require few sessions and have long-lasting results?

No matter how much technology has improved in dermatological procedures, they are still artificial, so I think it is better to have them as few times as possible.

If the effects last a long time, I think the number of treatment sessions will decrease accordingly.

What are some procedures that offer good efficacy and long-lasting results?

Setting aside price and pain, which is the best option when considering only efficacy and duration?