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