P33 - Alimentary Part 2 Flashcards
dental lamina proliferates into 3 embryonic structures
- enamel organ
- dental papilla
- dental follicle
enamel organ gives rise to ____ which is produced by ____
- enamel
- ameloblasts
dental pulp formed from _____ tissue enclosed by __-___ dental lamina
- mesenchymal
- cup-shaped
dentin formed by _____ which continuously renew dentin matrix throughout life of tooth
- odontoblasts
dental follicle gives rise to cells that produce
- cementum (cementoblasts)
- bony sockets (osteoblasts)
- periodontal ligament (fibroblasts)
malocclusions are
- congenital malformations of the mandible/maxilla
- failure of upper and lower incisors to oppose due to abnormal jaw conformation
malocclusions are common in what breeds
- brachycephalic breeds
prognathism
- protrusion of mandible (underbite)
brachygnathism
- shortening of mandible (overbite)
malocclusions of teeth in rodents and rabbits may lead to
- locked jaw
- ingrown teeth
tooth agenesis
- tooth fails to develop
anodontia
- no teeth
oligodontia
- too few teeth
supernumerary tooth
- extra tooth develops
polyodontia
- too many teeth
dentigerous cyst
- results from dental dysgenesis
viral infection of ameloblasts most commonly by
- canine distemper virus
segmental enamel hypoplasia is a viral infection of
- ameloblasts
segmental enamel hypoplasia infection must occur before
- enamel formation is completed
- before 6 months of age
feline external resorptive neck lesions also known as
- feline odontoclastic resorptive lesions
feline external resorptive neck lesions caused by
- ondotoclastic resorption of cementum at neck area and root
- reabsorb minerals from tooth
feline external resorptive neck lesions result in
- external neck cavities (caries) -> secondarily harbor bacterial plaques that result in further decay and inflammation
periodontal disease is damage to
- periodontal ligament
dental plaques leads to
- atrophy and inflammation of adjacent gingiva
pathogenesis of periodontal disease
- bacteria produced acids, enzymes and toxins that damage enamel substrate (cavities)
- destroy adjacent gingiva (gingivitis) and periodontal ligament (periodontal disease) resulting in loosening of tooth and eventual loss
periodontal disease has similar pathogenesis as
- CUPS
infundibular impaction important disease of what species
- ruminants
feed impacted into _____ ____ encourages bacterial growth
- infundibular cups
damage of infundibulum leads to exposure and infection of
- pulp cavity -> infection leads to tooth root abscess and fistulous tracts that may rupture into paranasal sinuses (suppurative exudate)
dental neoplasia (3)
- peripheral odontogenic fibroma (POF)
- ameloblastoma
- odontoma
peripheral odontogenic fibroma (POF) arises from
- periodontal ligament and dental mesenchyme
ameloblastoma arises from
- structures of dental lamina
ameloblastoma tumors tend to be
- large tumors that are slowly invasive and locally destructive and osteolytic (lysis of bone)
odontoma originate from
- enamel organ
common types of tonsillar neoplasia (2)
- lymphosarcoma (bilateral)
- squamous cell carcinoma (unilateral)
sialadenitis
- inflammation of salivary gland
- rabies and distemper can cause
ranula
- salivary mucocele
- cystic saliva-filled distention of salivary duct
actinobacillosis also known as
- wooden tongue
opportunistic invader of actinobacillus lignieresii causes
- chronic granulomatous glossitis with fibrosis that leads to tongue enlargement and reduced lingual mobility
candidiasis also known as
- thrush
candidiasis caused by
- overgrowth of candida albicans
candidiasis occurs secondarily to underlying
- immunosuppressive condition
uremic glossitis is tissue damage caused by 2 mechanisms
- uremic vasculopathy (endothelial injury)
- uremic toxicity (ammonia)
achalasia
- congenital neurogenic disorder causing reduced esophageal motility
achalasis occurs most often in what breeds
- terriers
- cocker spaniels
- miniature poodles
achalasis clinical signs (5)
- dysphagia
- gagging
- choking
- regurgitation
- aspiration pneumonia
megaesophagus
- dilation of esophagus due to insufficient, absent or uncontrolled peristalsis
megaesophagus recognized clinically by
- regurgitation of solid food
megaesohpagus may predispose to
- aspiration pneumonia
hiatal hernia is protrusion of
- abdominal esophagus and cardia of stomach through diaphragm into thoracic cavity
hiatal hernia may result in
- intermittent regurgitation or gastroesophageal intussusception
spirocerca lupi form ____ adjacent to esophagus
- granuloma
equine idiopathic esophageal muscular hypertrophy effect on esophagus
- thickened of distal esophageal smooth muscle
chronic cases of acid reflux esophagitis can lead to
- erosion
- ulceration
- mucosal hyperplasia
acid reflux esophagitis may predispose to
- esophageal squamous cell carcinoma