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Morph. > Pulp Anatomy and Root Morphology I & II (Ye's Version) > Flashcards

Pulp Anatomy and Root Morphology I & II (Ye's Version) Flashcards

1
Q

What is pulp?

A

The soft tissue component of the tooth and it occupies the internal cavities of the tooth

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2
Q

In general the outline of the PULP tissue resembles the _________ _______ of the tooth

A

External outline

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3
Q

The pulp originates from the ________ tissue

A

Mesenchymal

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4
Q

Functions of the pulp: (just the names)

  3. 4.
A
  1. Formative
  2. Nutritive
  3. Sensory
  4. Defensive
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5
Q

What is the 1. FORMATIVE (primary function) of pulp?

A

Involved in forming dentin and secondary dentin. Secondary dentin is formed throughout life and therfore the pulp cavity of an individual reduces in size throughout life.

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6
Q

What is the 2. NUTRITIVE function of pulp?

A

BLOOD supply to the tooth

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7
Q

What is the 3. SENSORY function of pulp?

A

NERVE supply to tooth

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8
Q

What is the 4. DEFENSIVE function of pulp?

A

Forms reparative dentin in response to mechanical, thermal, chemical, and bacterial insults. A severe injury may result in the formation of so much reparative dentin that the pulp chamber and canal is completely obliterated.

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9
Q

Internal anatomy of the Root:

The PULP CHAMBER consists of a _______, _______, and 4 ________.

A

ROOF, FLOOR, 4 WALLS - Mesial, Distal, Buccal, Lingual

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10
Q

Internal anatomy of the Root:

The PULP/ROOT CANAL extends from the floor of the _________ to the _______ ________

A

Pulp chamber to the apical foramen

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11
Q

Internal anatomy of the Root:

What is the apical foramen?

A

The opening of the root canal located at or near the tip of the root. The neurovascular bundle enters the root canal through here.

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12
Q

Internal anatomy of the Root:

The _______________ bundle enters the root canal through the _______ ________?

A

Neurovascular bundle; Apical foramen

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13
Q

Internal anatomy of the Root:

What is apical constriction?

A

The narrowest point of the root canal - usually 1/2 mm from (more coronal) the apical foramen

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14
Q

Internal anatomy of the Root:

What are lateral (supplemental) canals?

A

Small branches of the main canal that come off at the right angles to the main canal

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15
Q

Internal anatomy of the Root:

What are accessory canals?

A

Small branches in the apical 1/3 of the root that angle down from the main canal. Accessory canals are alos found in the furcation region of molars.

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16
Q

Internal anatomy of the Root:

What is the pulp chamber shaped by?

A

Shape is determined by the contour of the crown - follows the size and number of cusps.

17
Q

Internal anatomy of the Root:

The size of the canal is affected by what 3 factors?

A
  1. Age
  2. Caries
  3. Trauma
18
Q

Internal anatomy of the Root: Size

The size of the pulp (increases/decreases) as an individual ages?

A

Decreases

19
Q

Internal anatomy of the Root: Size

As caries/reparative dentin is formed, the pulp size (increases/decreases)?

A

Decreases

20
Q

Internal anatomy of the Root: Size

Severe trauma can result in complete __________ of the pulp space.

A

Obliteration

21
Q

Internal anatomy of the Root: Root Canal

Root canal shape options?

A
  • Straight
  • Curved
  • S-shaped
22
Q

Internal anatomy of the Root: Root Canal

Cross section shapes?

A

Round
Ovoid
Triangular
Ribbon-shaped
etc.

23
Q

Internal anatomy of the Root: Root Canal

Length?

A

Variable but in general fall within a range

24
Q

Internal anatomy of the Root: Root Canal

Canals and Foramen: many __________ possible (will learn these in endo)

A

Combination

25
Q

Internal anatomy of the Root: Apical 1/3 of Root

What is the apical delta?

A

The main canal that branches several times (breaks up into multiple canals) and exists through different foramen.

26
Q

Internal anatomy of the Root: Apical 1/3 of Root

What/where are accessory canals?

A

Branch off the main channel in the apical 1/3.

27
Q

Internal anatomy of the Root: Apical 1/3 of Root

Apical foramen?

A

Exit/entry of canal

28
Q

Internal anatomy of the Root: Apical 1/3 of Root

Apical constriction of the canal: Usually 1/2 mm from the ____________ - point to where the endodontic tx is completed.

A

Apical Foramen

29
Q

Internal anatomy of the Root: Apical 1/3 of Root

Lateral Canal: usually further from the ________ and at right angles to the canal.

A

Apex

30
Q

Pulp & Root Morph: Maxillary Central

__________ shaped root

A

Inverted cone

31
Q

Pulp & Root Morph: Maxillary Central

Root in cross section is described as being

A

Morph. (20 decks)

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