Laki,
You are right, most dental works have GOOD potential health implication. Remember, gum disease and tooth decay are probably the most common disease a person can have. And their impact on general health is well-documented.
Unfortunately, tooth implants are expensive. And I dont see they come down in price in the near future. But it is a good investment as they are usually very long term. You use your teeth everyday; and if your implant last you 15 years, I think it is a better value than any plasma tv u can buy.