Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
As per your complain,
Placentrex is a drug containing Peptides, Nucleotides and Glutamate and is derived from an extract of fresh, healthy, human placenta.
It is used to heal chronic non healing wounds and as you had a cut inside mouth since a long duration, it might be given to you for healing the wound only.
As per your explanation, it seems that you are left with only a cut mark that indicates that there is a possibility that the wound has somewhat healed and only a scar is left behind. If it is the case, you need not to worry as cancer wounds or ulcers never heal.
But, in case if there is no healing since 5 years, then it needs to be evaluated and you should consult an Oral Surgeon and get evaluated and a
biopsy can be done to rule out the cause and treatment can be done accordingly.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Honey Arora