Endodontology: understanding the science Flashcards

1
Q

Define Endodontology

A

The form, function, health of, injuries to and diseases of the dental pulp

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2
Q

Define endodontics

A

prevention and treatment of endodontic infections

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3
Q

What is endodontics all about?

A

BACTERIA and minimising bacterial infection

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4
Q

How can trauma such as root fracture affect the pulp?

A

Can cause it to shrink as a defensive response (pulp shrinks and lays down secondary dentine)

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5
Q

How should you regard pulp enamel and dentine?

A

As dead enamel and live pulp-dentine complex

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6
Q

Give some functions of the pulp

A
  1. Develops the tooth
  2. Important in sensation
  3. Provides nutrition
  4. Defense
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7
Q

What is ‘loose’ connective tissue?

A

A connective tissue that doesn’t have many cells

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8
Q

What do 60% of molar teeth have in regards to their pulp chamber

A

60% of molar pulp chambers communicate with the periodontal ligament through the floor (furca)

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9
Q

Do all teeth have pulp chambers?

A

No only pre molars and molars have pulp chambers

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10
Q

Is mechanical cleaning of the tooth enough to clean root canals?

A

No you have to supplement it with a disinfectant (so you need to clean out root canals with bleach)

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11
Q

How does a pulp respond to dentinal infection/ irritation?

A
  1. Inflammation
  2. Recovery
  3. Lays down secondary dentine
  4. Arterio-venous shunts
  5. Necrosis (Pulp death)
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12
Q

What can increased inflammation of the pulp lead to and why?

A

Pain as there’s increased blood flow in an enclosed space

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13
Q

What ca untreated Pulpal inflammation lead to?

A

Pulpal necrosis (death)

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14
Q

How can the pulp get injured?

A
  1. Caries
  2. Dentists (Iatrogenic damage) due to preparations, restorations and scaling
  3. Trauma
  4. Loss of tooth substance through wear
  5. Periodontal disease
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15
Q

State the mean total number of bacteria in infected root canals?

A

10 million / ml of sample

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16
Q

What type of bacteria are present in infected root canals?

A

Mixed aerobic / anaerobic species

Proteolytic

17
Q

State the mean number of bacterial species in infected root canals?

A

6-8 most of these are proteolytic bacteria

18
Q

How can proteolytic be killed?

A

Can be directly killed by bleach

19
Q

What is a disadvantage of removing the pulp

A

pulp death removes the line of defence which was provided by pulp-dentine complex

20
Q

What is the next line of defence to bacteria after the pulp has died?

A

The peri radicular tissues

21
Q

What do peri radicular tissues do once the pulp dies?

A

peri-radicular tissues mount (an only partially successful) protective response to the infection

22
Q

Where does bacteria move if theres no pulp?

A

bacterial growth progresses along canal, rapidly

toxins and by-products of bacteria diffuse apically from crown to apex with no intervening defence (