Exam Review Flashcards
underfilling
denotes total obturation of the root canal space but is short of the apical foramen
- filling short of the minor diameter
- sealed but short of the end
when compared to underextension
underextension
denotes filling material short of the apex and the canal may not have been adequately filled within its confines
gets to the space but is not completely filling the space up
overfilling
denotes total obturation of the root canal space with excess material extruding beyond the apical foramen
Overextension definition and implication if occurs
denotes filling material beyond the apex, but the canal may not have been adequatley filled within its confines
can happen if do not have a correct cone fit, push too hard, or extrude too much at the end
most likely to fail out of all them (better to fill short than long)
if pulp canal disappears on radiograph what is the likely reason? what is this called?
likely there are two canals and it split off and is termed ‘fast-break’
when the pulp canal disappears mid-root it is usually an indication that there area likely two or more canals present
how does canal calcify?
coronal to apical end
do we use paste fillers? what about resilon?
NO – cytotoxic
resilon – did not hold up clinically
