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Endotontics > Root resorption > Flashcards

Root resorption Flashcards

1
Q

resorption definition

A

a condition associated with either physiologic or a pathologic process resulting in a loss of dentin , cementum, and /or bone

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2
Q

physiologic resorption

A

like primary teeth loss

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3
Q

resorption in permanent teeth is usually?

A

pathologic

- internal or external

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4
Q

which resopriton is more prevelant?

A

external

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5
Q

definition of internal resoprtion

A

a pathologic process initiated within the pulp space with loss of dentin and possinle invasion of the cementum

may or may not perforate to the external root surface

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6
Q

etiology of internal root resoprtion

A
  1. truama
  2. infected coronal pulp
  3. metaplastic tissue - tissue capable of resoprtion from somewhere else comes here?
  4. extreme hear during cutting
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7
Q

prerequisite for internal resoprtion

A

loss or alteration of the odontoblastic layer and predentin

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8
Q

loss of what layer with internal resoprtion

A

odontoblastic layer

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9
Q

histology of intenral resorption

A
  1. granulation tissue with multi-nucleated giant cells
  2. loss of odontoblastic layer
  3. nectrotic pulp coronal to granulation tissue
  4. bacteria in dentinal tubules
  5. no adjacent bone resorption
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10
Q

cells you will see in resorptino

A

multi-nucleated giant cells

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11
Q

external surface of bone in internal resoprtion ***

A

in tact!!

- not the case all the time in external

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12
Q

clinical manifestations of internal resoprtion

A
  1. asympotomatic
  2. discovered in routine radiographs
  3. vital pulp
  4. pink tooth
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13
Q

internal resoprtion radiographic feature

A

fairly uniform radiolucent enlargment of the pulp canal

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14
Q

internal resorption treatment

A

perform root canal therapy as soon as possible

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15
Q

internal resoprtion prognosis

A

good!

but decreases to fair or poor f perforated externally

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16
Q

definition of external resorption

A

resorption initiated in the periodontium and initially affecting the external surfaces of the tooth

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17
Q

surface resorption

A

a PHYSIOLOGIC process causing small superficial defects in the cementum and underlying dentin that undergo REPAIR by deposition of new cementum

root surface undergoes small area of minimla loss of cemntum and dentin – spontaneous repaire usually

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18
Q

classification of external resoprtion

A
  1. surface
  2. replacement
  3. inflammatory
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19
Q

replacement resorption - describe

aka

A

replaced actively by bone – relacement

basically anklyosis

20
Q

inflammatory replacement - describe

A

resoprtion root but also erosino of pulp– erosion of bone and dentin

21
Q

etiology and histology of surface resoprtion

A

minor luxation injury

orthodontic movement

small resoprtive lacunae with local inflammatory response

22
Q

surface resoprtion sympotamic?

A

usually - no

RADIOGRAHIC appearance

or invisible?

23
Q

replacement resoprtion definiton

A

a PTHOLOGIC loss of cementum, dentin, and periodontal ligament with the INGROWTH of bone into the defect and fusion of bone to dentin with a loss of physiologic mobility and the LACK OF RADIOLUCENCY at the resorptive interface

24
Q

which resorptions are pathologic vs physiologic?

A

surface is physiologic whereas replacement and inflammatory are pathologic

25
Q

histology of replacement

A

direct contact between bone and dentin without separating periodontal ligament and cemental layer

26
Q

etiology of replacement resorption

A
  1. extensive trauma

2. replantation

27
Q

clinical manifestations of replacement resorption

A
  1. lack of mobility
  2. metallic sound to percussion
  3. infraocclusoin in the developing dentition
  4. ultimately tooth is lost due to loss of root support
28
Q

definiton of inflammatory resorpton

A

PATHOLOGIC loss of cementum, dentin, and BONE resulting in the root and adjacent bony tissue

29
Q

classification of inflammatory resorption

A
  1. cervical
  2. lateral
  3. apical
30
Q

etiology of inflammatory resorption

A
  1. dental trauma
  2. pulp necoriss
  3. excessive mechanical forces
  4. intracoronal bleaching
  5. pressure from impacted teeth
  6. tumors
  7. replantation
31
Q

histology of inflammatory resorption

A
  1. periodontal infliltrate with lymphocytes, plasma cells, and polymorphonuclear leukocytes
  2. multiucleated giant cells resorbign root surface
32
Q

breakdown of external resorption

A
  1. surface
  2. replacement
  3. inflammatory
33
Q

pulp is usually vital in which two categories of inflammatory external resorptions

A
  1. cervical

2. lateral

34
Q

cellls responsible for inflammatory resorption whethr internal or external

A

multi-nucleated giant cells

35
Q

inflammatory ressoprtion radiographic appearance

A

progressive radiolucent areas of the root and adjacent bone

mottled appearance

36
Q

pink spot seen in?

A

cervical inflammatory resorption

and internal resorptions

37
Q

clinical manifestations of inflammatory resorption

A

depends on pulpal status – can see pink spit in cervical resorption

38
Q

is cervical inflammatory resorpotion within the pulp?

A

NO

39
Q

pulpal status in apical inflammatory resorption? implication in treatment

A

NECROTIC – SO TX WITH ENDO THERAPY — good prognosis

40
Q

lateral inflammatory resorption pulpal status? treatment?

A

if nectoric – perform endo treatment

early diangosis is key

Ca(OH)2 medicament

could be reversed

surgical treatment if needed

41
Q

pulpal status of inflammatory cervical resoprtion

A

usually vital

pulp plays a role but could get exposed

may presetn as reversible pulpitis

42
Q

overview of extern al resoprtion

A
  1. resorption initiated in the periodontium and initially affecting the external surfaces of a tooth
  2. surface, inflammatory, or replacement
  3. cervical lateral or apical
43
Q

radiographic features of internal resoprtion vs external

A

root canal outline is distorted

  1. root canal and the defect appear contigous

EXTERNAL

  • root canal outline is NORMAL
  • appears ‘running through’ radiolucent defect
  • take a CT scan
44
Q

T/F external resorption is always accompanied by resorption of bone

A

TRUE – important radiographic feature when distinguishing external resorption from internal

45
Q

positive vs negative vitality testing in external and internal resorption

A

internal and inflammatory cervical external resorption

negative inapical and lateral inflammatory resorption

46
Q

internal resorption only happens with vital pulp?

A

YES

Endotontics (21 decks)

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