Hi, my name is Froy!

PIP doesn't automatically entitle you to free dental or any other NHS treatment. Are you claiming any means tested benefits like Income Related ESA/JSA, Income Support? Claiming Universal Credit may also entitle you but it will depend on your circumstances. Please have a read of this link for more information. https://www.nhs.uk/nhs-services/dentists/who-is-entitled-to-free-nhs-dental-treatment-in-england/

If you're not claiming any of the benefits listed then there's the NHS low Income scheme but you will need to apply for this by filling out a form and wait for a decision. Full details here https://www.nhs.uk/nhs-services/help-with-health-costs/nhs-low-income-scheme-lis/