Pathological Resorption as a Complication of Traumatic Injury Flashcards
State the 3 types of resorption that tend for result due to trauma
- Surface resorption
- Infection related (inflammatory) resorption
- Replacement resorption
What does the chance of resorption occurring due to a traumatic dental injury depend on
- The injury
2. Open or closed apex
Which injuries have the highest risk of resorption
Avulsion (100%)
Intrusion (67-100%)
Does an open or closed apex pose a higher risk of resorption
Closed apex
What can surface resorption be due to
Can be pathological or physiological
What is the most important thing to remember about surface resorption
It is transient NOT progressive so will arrest once stimulus is removed
Describe where the periodontal ligament is found
Between bone and cementum
What is always happening to bone
It is always remodelling
What mediates bone remodelling
Osteoblasts and osteoclasts
Which cells are responsible for protecting the PDL connective tissue from remodelling
Fibrobalsts
What are found on the surface of cementum
Cementoblasts
What can happen to the PDL in injury
Destruction of fibroblasts and cementoblasts can occur
What happens if fibroblasts are damaged
The PDL will not be able to help its cell or regenerate meaning it will be lost
How does replacement resorption arise
- Death of PDL
- Bone is now in direct contact with tooth
- Ankylosis of bone due to direct contact with osteoblasts
- Resorption
What is replacement resorption described as
Described as being PROGRESSIVE (continuously occuring )
How does an tooth suffering from ankylosis present
- Not mobile at all
- Ankylotic high pitched sound (cracked teacup)
- Infraocclusion
How does inflammatory resorption arise
- Necrotic pulp
- Toxins diffuse through dentinal tubules
- Compromised PDL
- Inflammatory resorption
How does inflammatory resorption present on a radiograph
Associated with a radiolucency
What is the stimulus for replacement resorption
Death of PDL
What is the stimulus for infection resorption
Death of pulp
What are the risk factors for replacement resorption
- Type of injury
2. Maturity of tooth
What are the risk factors for infection resorption
- Type of injury
2. Maturity of tooth
How does replacement resorption present radiographically
No radiolucency
How does infection resorption present radiographically
Radiolucency present
