How to figure the cost of a medical procedure in the future when adjusting for inflation?

Question Details: My son broke a tooth in a place of business. Their insurance covered the immediate, temporary repair. His dentist stated that the repair may break off and that a permanent solution is a crown or veneer however he has to wait until he's an adult to have this done. The insurance says they will only cover medical payments up to 3 years, he won't be an adult for another 9 years. They are open to paying us for this future procedure now. How can I fairly and properly figure an adjusted amount of what a dental procedure will cost 9 yrs in the future? Thank you for your help, Mark

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