other Flashcards
apical gauging
using the k file equivalent to your max size recirpoc - file should advance easily to CWL and not beyond.
Can assess with apex locator - reading should be green. Tugback confirms apical control
what must you do between each round of reciproc pecking
remove debris from flutes
irrigate
recapitulate
(patency file once passed 2/3 length)
why must smear layer be removed
prevents sealer penetration
what probe for locating orifices
DG16
0 reading on electronic apex locator
indicates PDL
remove 0.5-1mm from this to calculate CWL
discuss apical taper of modified double flare
use one file size larger than master apical file.
prep to 1mm less than CWL
R/I/P
then one size less and repeat until desired file goes passively to desired length
master apical file then used to smooth prep
treatment options for class II div 1
accept and monitor
URA only
Growth modification
Camouflage
Surgery
treatment options for Class II div 2
accept and monitor
growth modification
camouflage
surgery
3 factors increasing difficulty of class III treatment
multiple teeth in anterior crossbite
AOB present
skeletal element to malocclusion
6 keys of occlusion
class I molars
crown inclination
crown angulation
no rotations
no spaces
flat occlusal planes
what causes narrow teeth on an OPT
too far forwards
what causes wide teeth on an OPT
too far back
smiley face OPT
frankfort plane not horizontal to floor - head tipped down
5 patient positioning for lateral ceph
ear rods in EAM
frankfort parallel to floor
stabilising apparatus on nasion
teeth in ICP or RCP
receptor parallel to mid sagittal plane
3 structures for superimposition of lateral cephs
anterior wall of sella turcica
inferior alveolar canal
middle cranial fossa