trauma from occlusion

Question 1

trauma from occlusion

Answer 1

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

Question 2

secondary occlusal trauma

Answer 2

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

Question 3

abrasion

Answer 3

1) loss of substance by mechanical wear other than mastication

Question 4

attrition

Answer 4

1) occlusal wear from contacts of opposing teeth

Question 5

abfraction

Answer 5

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

Question 6

sign of trauma

Answer 6

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

Question 7

fremitus

Answer 7

1) feel the tooth shift when they open and close

Question 8

miller classification

Answer 8

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

Question 9

physiologic occlusion

Answer 9

1) hydrostatic damping
2) compression and tension of PDL

Question 10

lack of function

Answer 10

1) narrowing of PDL space
2) supraeruption

Question 11

predisposing factors

Answer 11

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

Question 12

primary trauma from occlusion

Answer 12

1) excessive forces on intact attachment apparatus

Question 13

secondary trauma from occlusion

Answer 13

1) caused by normal to excessive forces on reduced periodontium

Question 14

karolyu hypothesis

Answer 14

1) interaction exists between TFO and alveolar ??

Question 15

glickman

Answer 15

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

Question 16

waerhaug

Answer 16

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

Question 17

rochester group

Answer 17

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

Question 18

gothenburg group

Answer 18

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

Question 19

radiographic signs

Answer 19

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

Question 20

cemental tears

Answer 20

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

Question 21

histologic signs of trauma

Answer 21

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

Question 22

developing hypermobility

Answer 22

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

Question 23

permanent hypermobility

Answer 23

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

Question 24

progressive periodontitis +physiologic occlusion

Answer 24

1) secondary occlusal trauma

Question 25

progressive periodontitis + TFO

Answer 25

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

Question 26

reduced but healthy periodontium + TFO

Answer 26

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

Question 27

treatment for TFO

Answer 27

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

Question 28

occlusal adjustment

Answer 28

1) can have regeneration of bone sometimes

Question 29

occlusal splint

Answer 29

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

Question 30

conclusion

Answer 30

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