Dental doctors or perhaps a dentist specialise in a variety of fields of research and they are characterised by the next big kinds;??? ?? ??? ??? ??? ???? ??? ????? ??? ?? ??????? ?? ????? ??? ?????? ?? ????? ?? ???? ?? ????? ?????? ??? ??????? ???? ? ????? ?? ????? ???? ? ???? ?? ???? ??? ???? ? ???? ???? ???? ?? ????? ??? ???? ??? ??? ?? ??? ?? ?