mand incisor anatomy

• 60% of the time, mand incisors will have __ root and ___ canal(s)

• 40% of the time, mand incisors will have __ root and ___ canal(s)

• ~2/3% of the time, mand incisors will have ___ roots/apices

• 1;1

• 1;2

• 2

usual shape of access for mand incisors

oval or triangle depending on where pulp horns are located

if a mand incisor has a second canal, it will ALWAYS be _____ (buccal/lingual)

lingual

when suspecting 2 canals, ask yourself…

• can you see one canal clearly on the RG

• is there an abrupt inc in RO in the canal

• is there an inc in RO in part of the canal space

steps to mandibular incisor access

1. outline shape: triangular to oval

2. remove pulp horns

3. remove lingual shoulder

4. instrumentation of fin (lingual)

typical measurements for the access hole are ______, but this is dependent still on pulpal anatomy

• height: 3 mm

• length 1 mm

bur to use for initial access

#1/2 or #1 carbide high speed round bur (or 701 was mentioned)

what to use to remove pulp horns

• spoon excavator

• ½ round slow speed carbide

• #1 round bur

the typical depth of the intial outline is ___ mm, then you change the orientation of the bur to follow the long axis of the tooth and go about __ mm down

1; 1.5

removing the lingual shoulder can be done w ________, this is important to do bc…

gates glidden; it allows access to missed lingual canal if present

what to use for instrumentation of fin

• precurved #15 or #20 K file or Hedstrom to check walls

• enlarge fins using a stem-winding motion until smooth

• irrigation and maintenance of patency is required

what are some difficulties w tx of mand incisors

• opening the wrong tooth

• crowing/access

• isolation

access is usually wider ____ (FL/MD) than ____ (FL/MD)

FL; MD

for mand incisors, your MAF should be no larger than ____

#45

you want to use caution when using finger spreader w these teeth during obturation, focers > ___ lbs will fracture the tooth

2.5