MFDS is an exam offered by the Royal College
of Surgeons. It stands for Membership of the Faculty of Dental
Surgeons. The exam is a requirement to allow further specialist
training for dentists in the UK and some Commonwealth countries.
If a dentist has this exam it indicates that he or she has undertaken
additional study over and above the minimum qualifying level,
and thus might be a good choice to deal with your family's teeth.