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If you are excused for multiple consecutive PFTs for medical reasons, you can be referred to a medical evaluation board. If the board determines that you are unfit for service due to a medical condition, you can be medically discharged.
If you are medically discharged you are eligible for a disability rating. Based upon the rating, you are eligible for a certain monthly disability payment.
If you were denied a VA disability rating you can appeal, but you have to do so within one year of the date of denial.
You said your denial was multiple years ago?
You can certainly try. The issue will be one, whether it is a service connected disability. Some people believe that to mean "caused" by service, but it really means occurring during service.
Whether a tooth problem will give you a disability rating, only the VA can say. But if you also broke your ankle on duty, and that continues to cause problems, perhaps.
You can file a new claim.
If you have any further questions, I'd be happy to assist.
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