trauma from occlusion Flashcards

1
Q

trauma from occlusion

A

1) condition where injury results to mouth
1) damage in periodontium caused by stress on the teeth caused by opposing jaw
2) excessive occlusive force causes injury to attachment
3) Pros (definition)
- trauma to periodontium from functional or parafunction forces causing damage to attachment by exceeding reparative ability

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2
Q

secondary occlusal trauma

A

1) injury resulting in tissue changes from normal to excessive occlusal forces applied to a tooth or teeth with reduced support

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3
Q

abrasion

A

1) loss of substance by mechanical wear other than mastication

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4
Q

attrition

A

1) occlusal wear from contacts of opposing teeth

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5
Q

abfraction

A

1) occlusal loading on surfaces causing tooth flexure (in cervical area)
2) NCCLs

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6
Q

sign of trauma

A

1) tooth mobility
2) wear patterns
3) loss of LD and PDL space increases
4) tooth migration
5) pain
6) fremitus
7) hypertrophy of muscles
8) TMJ dysfunction
9) fractured restoration

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7
Q

fremitus

A

1) feel the tooth shift when they open and close

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8
Q

miller classification

A

1) 0 none
2) 1 first sign greater than normal
3) 2 tooth can most 1 mm BL or MD but not occlusal apical
4) 3 tooth can more more than 1 mm BL, MD, and OA

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9
Q

physiologic occlusion

A

1) hydrostatic damping
2) compression and tension of PDL

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10
Q

lack of function

A

1) narrowing of PDL space
2) supraeruption

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11
Q

predisposing factors

A

1) bruxism
2) parafunction
3) stress
4) occlusal interferences
5) tooth loss

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12
Q

primary trauma from occlusion

A

1) excessive forces on intact attachment apparatus

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13
Q

secondary trauma from occlusion

A

1) caused by normal to excessive forces on reduced periodontium

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14
Q

karolyu hypothesis

A

1) interaction exists between TFO and alveolar ??

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15
Q

glickman

A

1) pathway of the spread of plaque induced gingival lesion can be changes if forces of abnormal magnitude are acting on a teeth harboring subg plaque
- zone of irritation
- zone of co-destruction
2) TFO is an etiologic factor of importance in situations with angular bony defects

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16
Q

waerhaug

A

1) examination of autopsy specimens
2) distance between subg plaque and
- perimeter of associated ???
30 angular defects and infrabony pockets occurred equally in teeth with TFO and in teeth without TFO
3) loss of attachment and bone are results of inflammation, not trauma

17
Q

rochester group

A

1) squirrel monkeys
- occlusal trauma does not influence periodontal disease in the presence of plaque

18
Q

gothenburg group

A

1) beagle dogs
2) duration of experiment up to 1 year
3) conclusion was that occlusal trauma could accelerate the progression of periodontal disease in the presence of plaque

19
Q

radiographic signs

A

1) widening of PDL
2) radiolucency in furcation or at apex
3) root resorption
4) disruption of LD
5) root fracture
6) wear faceting
7) cemental tears

20
Q

cemental tears

A

1) misdiagnosis
- received RCT in error
2) just detaches and may not show on xray

21
Q

histologic signs of trauma

A

1) thrombosis and hemorrhage
2) necrosis and hyalinization
3) cemental tears
5) root resorption

22
Q

developing hypermobility

A

1) increasing mobility
2) widening of PDL
3) inflammation
4) increased vascularity and osteoclastic activity
5) limited necrosis of PDL

23
Q

permanent hypermobility

A

1) mobility no longer increasing
2) wide PDL space
3) no inflammation
4) normal vascularity and osteoclastic activity
5) hyalinization of PDL

24
Q

progressive periodontitis +physiologic occlusion

A

1) secondary occlusal trauma

25
Q

progressive periodontitis + TFO

A

1) increase rate of progression
2) tooth cannot adapt to trauma
3) increase mobility much faster

26
Q

reduced but healthy periodontium + TFO

A

1) radiographic bone loss
2) no changes in PD or CAL
3) increase mobility
4) widened PDL
5) secondary occlusal trauma

27
Q

treatment for TFO

A

1) occlusal adjustment
- limited
- comprehensive
2) occlusal splint / night guard
3) ortho
4) occlusal reconstruction
5) splinting
6) management of parafunction

28
Q

occlusal adjustment

A

1) can have regeneration of bone sometimes

29
Q

occlusal splint

A

1) muscles are more relaxed after wearing it
2) less clenching

30
Q

conclusion

A

1)in healthy periodontium, TFO will not result in attachment loss or pocket formation
2) bone resorption in TFP should be interpreted as an adaptation of the ligament
3) a secondary etiology