Lecture 4 Flashcards
Define malocclusions
Failure of upper and lower teeth to correctly interdigitate
What is the problem with hypsodont teeth
Continue to grow and if not worn down will over grow
Define Prognathia
Protrusion of mandible - This is normal in brachycephalic breeds
Define Brachygnathia (hypognathia)
Shortened mandible
What is odontodystrophy
Anomalies of tooth development
List some dental dysgenesis
- Dentigenous cysts 2. Enamel hypoplasia 3. Congenital porphyria 4. Fluoride toxicosis
What is dental dysgenesis
Dysplasia, trauma, infection, toxins, tetracyclines
What is enamel hypoplasia
Caine Distemper virus
What is congenital porphyria
Defective red cell production, porphyrins accumulate in teeth
What is fluoride toxicosis
Soft, chalky enamel, rapidly worn down
What is feline external resorptive neck lesions
Painful lesions of which the cause is unknown. It is the resorption of dental tissue in neck and root region and these cavities may attract bacteria
What is periodontal disease
Dental plaque and tartar/calculus
What is dental plaque
Food combines with bacterial films resident on teeth
What is tartar/calculus
Mineralised plaque
What does mineralise plaque cause
- Atrophy and inflammation of gingiva 2. Acid and enzymes damage teeth 3. Cavities form 4. Gingival destruction 5. Periodontal ligament destruction 6. Loosing teeth 7. Alveolar osteomyelitis 8. Bacteraemia 9. Pain 10. Halitosis
What are dental neoplasia
Complex histologic appearance based on tissue/cell of origin and extent of differentiation
What are odontomas
Hamartomas of enamel organ
What are ameloblastomas
Epithelial neoplasms of enamel organ origin
What do tonsils not posses
Afferent lymphatics
What is an example that causes sialoadenitis
Rabies, canine distemper virus
What is sialoliths
Inflammation -> sloughed cells and exudate become mineralised
What is ranula
Cystic, saliva-filled distension of salivary duct. Lined by epithelium
What is salivary mucocoele
Pseudocyst filled with saliva. not lined by epithelium
What are the disorders of the salivary glands
- Sialoadenitis 2. Sialoliths 3. Ranula 4. Salivary mucocoele 5. Neoplasia
What are some developmental abnormalities of the tongue
Hamartomas, fissures, microglossia, macroglossia, ventral ankyloglossia, bird tongue
What does actinobacillus lignieresii (primary tongue lesion) do
- Gram negative bacillus resident in oral cavity 2. Opportunistic invader 3. Granulomatous inflammation, ‘club colonies’, fibrosis
What are 2 lesions secondary to systemic illness
- Candida albicans (yeast) 2. Uraemia, BVD, FMD ect
What does candida albicans show
- Intact mucous membrane of tongue and oesophagus 2. Grey green pseudomembrane overlies mucosa 3. Secondary to underlying disease, antibiotics, hyperglycaemia
What can gastric inflammation be caused by
Chemical, viral, bacterial, parasitic, mycotic, traumatic
What are the signs of gastric inflammation
- Vomiting and dehydration - Haemorrhage, oedema, increased mucous, inflammatory leukocytes, abscesses, granulomas, necrosis, erosions, ulcers
What are the steps causing haemorrhage gastritis
Septicaemia -> bacterial emboli -> thrombosis of vessels in submucosa -> haemorrhage, infarction, ulcerations
What causes haemorrhage gastritis
Salmonellosis, swine dysentery, colibacillosis
What causes eosinophilic gastritis
Parasites
What causes granulomatous gastritis
Mycobacterium tuberculosis, Parasites, Fungi
What causes uraemia gastritis
Renal failure