Root and Pulp Morphology Flashcards
type I root canal (pulp canal)
one canal to one foramina
type II root canal
two separate canals join at one apical foramina
type III root canal
two separate canals from chamber continue to two separate apical foramina
type IV root canal
one canal from chamber but splits to two canals and two apical foramina
incisors often have ___ pulp horns correlating with the ___ facial lobes and ___ mamelons
three (mesial, central, and distal)
peg lateral incisors (forming from ___ lobe) are more likely to have only ___ pulp horn
one; one
canines have ___ pulp horn under the ___ cusp
one; one
anterior teeth most likely have ___ root with ___ canal
one; one (type I)
if two canals exist in anterior teeth, most likely one is ___ and one is ____
facial; lingual
___ of mandibular incisors are type II or III and under ___ of mandibular canines are type IV
40% ; 20%
____ is the only anterior tooth that may have two roots
mandibular canine
why pulp cavities get smaller in older teeth
- deposit of secondary (additional) dentin as we age
- new dentin (reparative) forms as a reaction to injury
- calcium hydroxide liner can be used to stimulate additional dentin
normally there is ___ pulp horn per functional cusp ; therefore, maxillary premolars have ___ pulp horns
one; two
_____ with small lingual cusp may have only one pulp horn (as in canines)
mandibular 1st premolars
_____ with 3 cusps have 3 pulp horns
mandibular 2nd premolars
all mandibular premolars most often have ___ root with ___ canal
one; one
_____ most often have two roots with one canal in each root (57%); even with one root (39%), these teeth most likely have two canals (one buccal and one lingual)
maxillary first premolars
____ most often have one root and one canal (but may have two canals)
maxillary 2nd premolars
normally molars have ___ pulp horn per functional cusp
one
maxillary molars have ___ pulp horns (if ___ cusps are present)
four; four
mandibular first molar have ___ pulp horns and mandibular 2nd molar has ___ pulp horns
5; 4
maxillary molars most often have 3 roots and ___ canals (two in ____ root), and ___ orifices in the chamber floor
4; mesiobuccal; 4
mandibular molars most often have 2 roots but ___ canals (two in the ___ root) and ___ orifices in the chamber floor
3; mesial; four
clinical application of pulp morphology related to restorative dentistry
- know shape to avoid exposing pulp when preparing teeth for restorations
- avoid damage to pulp with burs (overheat, dry out)
- determine need for dental bases to protect, insulate, etc.
- knowledge of morphology critical when removing pulp (endodontic therapy)
