Had braces when i was a teen. got them off early due to decay, etc. i have dentinogenesis imperfecta. ill be getting a implant supported denture soon but i have a deep bite. will this affect the success of the procedur? should i fix the deep bite?

An examination of your current dentition and what is being replaced is needed to give you a meaningful answer. Since it is not possible on this free, public forum a consultation with a local prosthodontist would be your best source for guidance.

With your dental history, I would suggest consulting with two different specialists, an Orthodontist and a Prosthodontist. Without examining you it is impossible to advise you as to appropriate diagnosis and treatment plan.