unit 11 - pulp anatomy - periodontal configuration

pulp chamber, pulp cavity or coronal pulp are terms used to designate what?

the area of the crown filled with soft tissue

root pulp, radicular pulp, pulp canal and root canal are used to describe what

the portion of the root filled with soft tissue

does the pulp cavity fill the entire tooth or is it split

fills entire cavity

• descriptive only

the crown and root portion that contain the pulp tissues have been divvied into what

pulp chamber - crown

root pulp/canal - root

how has the pulp space been divided

arbitrarily

(split by convenience of description not reality)

what is the dental pulp

soft tissue

where is the dental pulp

internal cavities of the tooth

the outline/shape of the pulp tissue generally corresponds to what

the tooths external outline form

the dental pulp originates from what

the mesenchyme

the dental pulp have 4 functions what are they

• formative

• nutritive

• sensory

• defensive

what is the pulps initial function and when is it carried out

Dentine formation during the developmental period

what does the complex sensory system within the dental pulp control

blood flow

the complex sensory system is also responsible for mediating what

the sensation of pain

what represent the defensive response of the pulp to irritation

formation of reparative or tertiary dentine

reparative dentine is formed in response to what type of irritation

• mechanical

• thermal

• chemical

• bacterial

reactive dentine is usually limited to what

the area of pulpal irritation

what might be difficult or impossible to distinguish

reactive changes from purely ageing related changes

what is used for diagnosing and treating pulpal diseases

radiographs or digital radiography

what must be visualised when using radiographs

morphological features of the pulp chambers and root canals

what has to happen to visual the features

3D features are compressed into 2D radiographic images

radiographic views from a facial orientation show what type of view

a monoplane, buccolingual view of hard tooth structures and radiolucent spaces for the pulp canals

what colour is the pulp and hard tissue (enamel)

• pulp = darker

• hard tissue = lighter

what does the size of the pulp chamber depend on

the age of the tooth and its history of trauma

what is formed continuously throughout the life of the tooth

secondary dentine

under what conditions is secondary dentine formed continuously

as long as the vitality of the tooth is maintained

is secondary dentine formation uniform

no

READ - it will make everything make sense

done

where do odontoblasts produce greater quantities of secondary dentine

adjacent to the floor and the root of the pulp cavity

where do odontoblast produce less secondary dentine

adjacent to the walls of the pulp cavity

how does the pulp cavity size compare between young individuals and adults

larger in young individuals than adults

what can initiate a different type of dentine formation

severe traumatic injuries

what is irritation-induced dentine also called

reparative dentine

reparative dentine may be formed in response to what

carious process, abrasion , attrition, and operative procedure

is reparative dentine protective or harmful

protective, but is detrimental in later years

why might reparative dentine be detrimental in later years

because a finite amount of space is present within the pulp cavity

true or false

you should compare the pulp cavity inn a given tooth to others

true

what supplies the internal contents of the pulp cavity

the neurovascular bundle

where does the neurovascular bundle entre

through the apical foramen or foramina

what is the size of the apical foramen during early root development

larger than the pulp chamber

what happens to the apical foramen at completion of root formation

it becomes more constricted

can a root have multiple apical foramen

yes

if the apical foramen are large enough the space that leads to the main root canal is called what

supplemental or lateral canal

what is the supplemental or lateral canal

a space leading to the main root canal if the openings are large enough

what is the delta system

when the root canal breaks into multiple tiny canals

why is it called a delta system

because of its complexity

demarcation of pulp cavity and canal

what is the CEJ

cementoenamel junction

demarcation of pulp cavity and canal

does the CEJ correspond exactly to the transition from pulp chamber to the root canal

no

demarcation of pulp cavity and canal

how is the demarcation mainly based

macroscopically

demarcation of pulp cavity and canal

how may the demarcation be visualised

by exploring the CEJ and noting the density difference on radiographs

demarcation of pulp cavity and canal

what covers the external surface of dentine

enamel

demarcation of pulp cavity and canal

what does dentine make up part of

the pulp chamber

demarcation of pulp cavity and canal

how does pulp in the chamber compare microscopically to pulp in the root canal

more cellular

demarcation of pulp cavity and canal

what shape are odontoblasts in the coronal pulp chamber

cuboidal

demarcation of pulp cavity and canal

what happens to the shape of odontoblasts towards the apex

flatten out

demarcation of pulp cavity and canal

is the transition between pulp chamber and root canal sharply demarcated microscopically

no

demarcation of pulp cavity and canal

is the transition sharply delineated macroscopically

no

what are pulp horns

projections or prolongations in the pulp chamber of roots

pulp horns correspond to what

the crowns major cusps or lobes

what determines the prominence of pulp horns

the prominence of cups or lobes

when are pulp horns more prominent

in young individuals

why do pulp horns become less prominent with time

due to formation of secondary dentine

read

done

what must the clinician be aware of during operative procedures

the location and size of the pulp cavity

why must clinicians know pulp location and size

to prevent unnecessary encroachment on the pulp

what else must the clinician known the location of

the mandibular canal and nerve

what procedures require thorough knowledge of the pulp cavity

endodontic procedures

what errors may result in the loss of a tooth

perforation

failure to locate all canals

perforation of the root surface

what must the clinician known for endodontics

size and location of the pulp chamber and expected number of root and canals

can radiographs always detect accessory root or canals

no

what may indicate the presence of additional canals

shape of the crown

what must the clinician recognise during endodontic procedures

internal signs of additional canals