Perio And Occlusal Forces Flashcards
What is the function of the periodontium?
To attach the teeth to the jaw
To dissipate occlusal forces
What 4 factors afffect tooth mobility?
Width of PDL
Height of PDL
Inflammation
Number, shape and length of roots
Mobility can be accepted unless…
Progressive
Symptomatic
Provides difficulty with restorative treatment
What are the 3 ways mobility can be reduced?
Control of plaque induced inflammation
Correct occlusal relations
Splinting
How does inflammation affect mobility?
Inflammation causes decreased tissue tone - which increases mobility
What is primary occlusal trauma?
Injury resulting in tissue changes from excessive occlusal forces applied to a tooth with normal periodontal support
How does the PDL react to excessive occlusal loads in primary occlusal trauma?
PDL widens until forces can be adequately dissipated
This returns to normal when demand is reduced
How does the height of the PDL affect mobility?
Lower height, more apical fulcrum = more coronal mobility
What is secondary occlusal trauma?
Tissue changes from normal or excessive occlusal forces applied to a tooth with reduced periodontal support
What is fremitus?
Visible/ palpable movement of tooth when subjected to occlusal forces
How is a vertical bone defect created?
If there is wider inter proximal bone - zone of destruction is 2mm so will instead travel down the root of the tooth
When is splinting appropriate?
When mobility is due to advanced periodontal attachment loss
Is causing discomfort/ difficulty chewing
Teeth need to be stabilised for debridement
What is a disadvantage of splinting?
May cause difficulties with oral hygiene
