Surgery of the oral cavity, oesophagus and neck. Equine dentistry. Flashcards
number of teeth in mares
40
number of teeth in stallions
44
Dental formula
I 3/3
C 1/1
PM 3/3
M 3/3
mineral content of enamel
95%
enamel
no reparative ability
dentin minteral content
70%
dentin
softer and more flexible than enamel
help to prevent cracks
cementum
bone like
living tissue - peridontal lig supplies
infundibulum can collect bacteria
number of pulp channels
5
can be more on the 6th and11th molars
how many roots do maxillary cheek teeth have
3 roots
incisor numbers
101, 201, 301, 401
canine numbers
104, 404
wolf teeth numbers
105, 405
2rd premolar
106 , 406
3rd premolar
107, 407
3rd premolar
107, 407
4th premolar
108, 408
molars
109,110, 111, 409,, 410, 411
pulp numbering system
1st
pulp channel on maxillary side
pulp numbering system
2ND
Caudo lateral pulp channel
pulp numbering system
3rd
rosto medial
pulp numbering system
3rd
rosto medial
pulp numbering system
4th
caudolateral
pulp numbering system
5th
palatine
pulp numbering system
6th
most rostal point of tooth
pulp numbering system
7 and 8
most caudal part of tooth
chewing of a horse
only 1 side at a time
normal - ventral - lateral - dorsal - medial
disorders of equine incisors
- Retained Deciduous teeth
- Malocclusions
- Supernumerary teeth
- Trauma
- Caries
- Tooth Resorption (EOTRH syndrome)
- Retained Deciduous teeth
maleruption of teh permanent tooth
failure of root resoprtion
- Malocclusions
offset bite
parrot mouth - surgery
sow mouth
- Supernumerary teeth
- Similar developmental abnormalities to cheek teeth can arise in incisors
- Before too extraction take x – ray of this area.
- Can have longer root than normal
- Trauma
- Common in young horses
- Kicking injury, chew something
- Doral ventral view: is much more informative for us: Where is the fracture line.
- Cerclage wire fixation: Sedation (Xylazine, detomedine and sometimes with diazepam or butorphanol)
- Fixation: Cerclage wire, Cerclage wire holders + holder, 3.2, or 2.5 gage drill guide or drill holder
- Caries
develop due to fracture, kicking or hypocementosis
- Tooth Resorption (EOTRH syndrome)
presents from normal through fractures or diseases teeth
incisors and canines
treatment - extraction
causes pain and enlarged roots
enlarged bulbs on root area
wolf tooth
1st premolar
remove in younger horses
root can be x3 longer than crown area
diseases of cheek teeth
- Overgrowth (Not only on 6th and 11th but also on the 9th and 10 too)
- Supernumerary teeth
- Diastema
- Fracture
- Infundibular caries
- Pulpitis
- Periapical infection
- Displaced.
diastema
space btw teeth
it can occur If there is a dispaement on the 9th and the angulation will change and diastema can built inbetween
in a younger horse
a older horse where the roots angulation change a bit more straight, not so angulated – diastema can occur quite easily there.
types of diastema
open and closed
open diastema
Better prognosis ..> Can do the tooth rasping and cleaning this will heal.
closed diastema
The crowns in between there is a contact and under it there is a space where the food can accumulate and cause periodontal disease and cause infection in the periodontal ligament.
can cause osteomyelitis and loosing of the 9th and the 10th tooth.
pulpitis
imflammation of the pulp due to bacterial penetration in pulp channels
abrasions, trauma
thermal damage
tooth extraction
grab wrong tooth
treatment of pulpitis
Endodontic treatment
sedation
Tooth extraction
lavage with saline with betadine.
silicon suture
periapical infection
easier to detect in young horses
mandibular - enlarged and painful can cause sinusitis and fistule canal formation
maxillary - purulent nasal dishcarge from sinus. CT necessary
displaced cheek teeth
congenital
- Difficulties during eruption.
- Displacements caused by bad eruption or difficulties around eruptation.
- MIB: Minimally invasive buccotomy (inbetween the infected tooth)
tumours of oral cavity
squamous cell carcinoma
primary sinusitis
rare
strep infection
ct needed
secondary sinusitis
often tooth problem
fracture, neoplasia, hematoma, sinus cyst
symptom of sinusitis
- Nasal discharge (Serous/mucopurulent)
- Swelling/deformation
- Decreased airflow (Dyspnoea, apnoea)
- Sometimes see: Cutan fistula, Ocular Discharge or Fetid odor.
diagnosis of sinusitis
endoscope - medial meatus
clinical exam of mouth
sinoscopy
ct/ scintography/ mri
xray - radiodensity in sinus
sinus trepanation steps
- removed periosteum from bone
- drill 23mm hole into sinus frontalis
- blindly take out bulla
- can remove infected pus
- create new exit from sinus into nasal passage (forceps)
- folie catheter - lavage for 3-5 days
- suture periosteum
- sulture cutis and subcutis together
problems with trepanation
a lot of bleeidng
sinus cyst formation
unknown aetiology
symtpoms - swelling, decreased airflow, nasal discharge, stridor
treatment - trepination
facial paralysis
Symptoms
swelling, odour, nasal discharge, stridor
cause of facial paralysis
platelet epithel carcinoma