I have 4 false front upper teeth and i use dentures can i take braces to fix my teeth to alignment upper and lower teeth? it is possible?

It might be possible. To know for sure, please visit a local orthodontist for a consultation. Once they examine you, they will be able to explain your treatment options.

Yes , if you want alignment of remaining teeth in upper and Lower arch, it can be done because your Upper front missing teeth has removable partial Denture which should not cover the buccal flange in upper left and right present teeth . The Denture might not even need to adjust ..

It is not unusual for an Orthodontist to put together a treatment team Orthodontist/Restorative Dentist/Periodontist/Oral Surgeon/etc to provide the best treatment for your multidisciplinary problem. Seek consultation with an Orthodontist (ask your General Dentist for referral) to start the diagnostic process.