 psycholog children's dental treatment commun deal influenc involv develop child's attitud dental treatment extrins educ intrins constitut hereditari understand help determin correct psycholog polici manag child surgeri aim psycholog appli dentistri discov mode treatment procedur ensur child subject psychic traumat psychophylaxi second aim manag call difficult child treatment understand better child's frame mind dental treatment situat surgeri dealt step step child experi sens psych basic sens -dash hear -dash touch pressur sensat smell tast children dental treatment rais emot tension suscept anxieti reaction degre fear manifest children class categori cooper difficult patient psycholog procedur treatment children group base principl summar 'psychophylaxi dentistri' difficult children emploi psycholog measur-psychotherapi suggest extrem exact case premed help find contact child experiment work demonstr find 1 dental treatment consist seri interdepend traumat impuls appear close analysi situat 2 advers respons elicit pain sensori impress neg emot background 3 psychic traumat child dental treatment prevent simpl psycholog measur 