trauma from occlusion Flashcards
trauma from occlusion
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
secondary occlusal trauma
1) injury resulting in tissue changes from normal to excessive occlusal forces applied to a tooth or teeth with reduced support
abrasion
1) loss of substance by mechanical wear other than mastication
attrition
1) occlusal wear from contacts of opposing teeth
abfraction
1) occlusal loading on surfaces causing tooth flexure (in cervical area)
2) NCCLs
sign of trauma
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
fremitus
1) feel the tooth shift when they open and close
miller classification
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
physiologic occlusion
1) hydrostatic damping
2) compression and tension of PDL
lack of function
1) narrowing of PDL space
2) supraeruption
predisposing factors
1) bruxism
2) parafunction
3) stress
4) occlusal interferences
5) tooth loss
primary trauma from occlusion
1) excessive forces on intact attachment apparatus
secondary trauma from occlusion
1) caused by normal to excessive forces on reduced periodontium
karolyu hypothesis
1) interaction exists between TFO and alveolar ??
glickman
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
waerhaug
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
rochester group
1) squirrel monkeys
- occlusal trauma does not influence periodontal disease in the presence of plaque
gothenburg group
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
radiographic signs
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
cemental tears
1) misdiagnosis
- received RCT in error
2) just detaches and may not show on xray
histologic signs of trauma
1) thrombosis and hemorrhage
2) necrosis and hyalinization
3) cemental tears
5) root resorption
developing hypermobility
1) increasing mobility
2) widening of PDL
3) inflammation
4) increased vascularity and osteoclastic activity
5) limited necrosis of PDL
permanent hypermobility
1) mobility no longer increasing
2) wide PDL space
3) no inflammation
4) normal vascularity and osteoclastic activity
5) hyalinization of PDL
progressive periodontitis +physiologic occlusion
1) secondary occlusal trauma
