Difference between revisions of "Category:Teeth - Pathology"
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Revision as of 11:22, 26 May 2010
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Introduction
See anatomy and physiology of the teeth
Functional Anatomy
- The gingival crevice is an important site for disease processes in mouth to begin.
- In ruminants and rodents teeth may fail to oppose properly or to allow side to side movement of jaws. This produces uneven wear (especially in horse). Sharp edges are produced on the outside of the teeth in the upper jaw and inside of the teeth in the lower jaw, which causes painful feeding and inanition (not eating).
- Approximately 75% of wasting horses have dental abnormalities.
- This is not a problem in carnivores as do they not use teeth for mastication.
Proliferative Pathology
Hyperplastic
Focal fibrous hyperplasia
Neoplastic
Peripheral odontogenic fibroma[1]
Peripheral ameloblastoma[1]
- aka: basal cell carcinoma, acanthomatous ameloblastoma, acanthomatous epulis
- 18% of cases.
- Islands and sheets of mature odontogenic epithelium within a collagenous fibrous connective tissue stroma of low/moderate cellularity.
- Each of the islands bounded by a row of tall columnnar cells.
- These palisading cells exhibit polarisation away from the basement membrane and had cytoplasmic vacuolation.
- Central cells had a basaloid appearance.
- Often infiiltrating into the underlying bone.
- Synonymous with basal cell carcinoma.
With thanks to Andrew Jefferies (Cambridge) and Alun Williams (RVC) for providing access to their lecture materials
Central ameloblastoma[1]
- Different from peripheral ameloblastoma - cystic changes and follicular arrangement of ameloblasts and stellate reticulum cells, resembling the basic structure of the enamel organ.
With thanks to Andrew Jefferies (Cambridge) and Alun Williams (RVC) for providing access to their lecture materials
Degenerative Pathology
Odontodystrophy
- Damage to ameloblasts (which form enamel) in utero upsets permanent incisor formation.
- Enamel is marked by pits, lines etc.
In ruminants:
- Damage to enamel formation most often caused by fluoride poisoning.
- Seen in cattle grazing on pasture contaminated by cement works effluent.
- Chalky mottling and yellow brown pitting of tooth.
In canines:
Very severe systemic disease early in life / or in utero may result in severe discoloration or pitting of teeth due to effect on enamel formation. (e.g. distemper in dog)
Metabolic Pathology
Nutritiona Pathology
Traumatic Pathology
Vascular Pathology
References
Learning Tools
Subcategories
This category has the following 4 subcategories, out of 4 total.
T
Pages in category "Teeth - Pathology"
The following 5 pages are in this category, out of 5 total.