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Mindmap von Haneen Kokash, aktualisiert more than 1 year ago
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Erstellt von Haneen Kokash
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lecture 7 abnormalitis of teeth not full
- POST-DEVELOPMENTAL LOSS OF TOOTH STRUCTURE
- Internal resorption
- after injury to pulpal tissues:
physical trauma or caries,
pulpitis.
- resorption can continue as long as vital pulp
tissue remains and may result in
communication of the pulp with the PDL.
- resorption can continue as long as vital pulp
tissue remains and may result in
communication of the pulp with the PDL.
- patterns
- Inflammatory resorption
- resorbed dentin is replaced by inflamed
granulation tissue.
- histo
- the pulp tissue in the area of
destruction is vascular
- increased cellularity and
collagenization
- adjacent to the dentinal wall are numerous multinucleated
dentinoclasts
- - An inflammatory infiltrate cells are
common
- - An inflammatory infiltrate cells are
common
- adjacent to the dentinal wall are numerous multinucleated
dentinoclasts
- increased cellularity and
collagenization
- the pulp tissue in the area of
destruction is vascular
- resorbed dentin is replaced by inflamed
granulation tissue.
- Replacement or metaplastic resorption
- involve any portion of the canal
- cervical zone is the most
affected
- portions of the pulpal dentinal walls are
resorbed and replaced with bone or cementum
like bone.
- destruction is less defined than that seen in
inflammatory resorption
- destruction is less defined than that seen in
inflammatory resorption
- portions of the pulpal dentinal walls are
resorbed and replaced with bone or cementum
like bone.
- cervical zone is the most
affected
- histo
- pulp tissue is replaced by
woven bone that fuses with
the adjacent dentin
- pulp tissue is replaced by
woven bone that fuses with
the adjacent dentin
- involve any portion of the canal
- Inflammatory resorption
- affected
part
- coronal pulp
- crown can display a pink discoloration
(pink tooth of Mummery)
- crown can display a pink discoloration
(pink tooth of Mummery)
- root
- he original outline of the canal
is lost and a balloon-like
radiographic dilation of the
canal is seen.
- he original outline of the canal
is lost and a balloon-like
radiographic dilation of the
canal is seen.
- coronal pulp
- after injury to pulpal tissues:
physical trauma or caries,
pulpitis.
- External resorption
- extremely common
- Factors
- 1. Periradicular inflammation
2. Excessive mechanical forces
(e.g., orthodontic therapy) 3.
Dental trauma 4. Excessive
occlusal forces 5. Pressure
from impacted teeth 6.
Intracoronal bleaching of
pulpless teeth 7. Periodontal
treatment 8. Reimplantation
of teeth 9. Grafting of alveolar
clefts 10.Cysts 11.Tumors
12.Hormonal imbalances
13.Hyperparathyroidism
14.Local involvement by
herpes zoster 15.-Paget
disease of bone
- 1. Periradicular inflammation
2. Excessive mechanical forces
(e.g., orthodontic therapy) 3.
Dental trauma 4. Excessive
occlusal forces 5. Pressure
from impacted teeth 6.
Intracoronal bleaching of
pulpless teeth 7. Periodontal
treatment 8. Reimplantation
of teeth 9. Grafting of alveolar
clefts 10.Cysts 11.Tumors
12.Hormonal imbalances
13.Hyperparathyroidism
14.Local involvement by
herpes zoster 15.-Paget
disease of bone
- Clinical and
Radiographic
- occur at any site that
contacts vital soft tissue
- Most cases involve the apical
or midportions of the root
- Most cases involve the apical
or midportions of the root
- "moth-eaten” loss of tooth structure- less well defined
- compressive forces appear more strongly related than
tensile forces.
- occur at any site that
contacts vital soft tissue
- Idiopathic apical root resorption involving multiple teeth in maxillary and mandibular arches
- histo
- numerous multinucleated dentinoclasts located
in the areas of structure loss
- resorption area <<repaired by deposition of osteodentin.
- large
defect
- inflamed granulation tissue
- woven
bone
- Extensive bony replacement<<lead to Ankylosis.
- inflamed granulation tissue
- large
defect
- resorption area <<repaired by deposition of osteodentin.
- numerous multinucleated dentinoclasts located
in the areas of structure loss
- treatment
- Apically sites cannot be
approached without
significant damage
- cervical areas can be treated by
surgical exposure, removal of all
soft tissue from the defects, and
restoration of the lost structure o
the tooth
- Apically sites cannot be
approached without
significant damage
- extremely common
- Internal resorption
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