hello and welcome,
since you had your front teeth fractured 6 months back,the tooth has infected and spread into periapical area.
there may be abscess
formation at the root portion of teeth thus causing white gums.
visit your dentist
and get the fractured teeth checked clinically.
an x-ray will help to rule out the condition of teeth.
root canal treatment
and curettage will help to reduce the infection.
if the tooth cannot be saved,it has to be extracted and replaced with ceramic bridges.
after rct,crown has to be placed as there is chance of breakage of teeth.
take complete course of antibiotics prescribed by your dentist.
get your teeth cleaned.