large animal surgery dental sx trephination amy fayette november 2005
TRANSCRIPT
Large Animal Surgery
Dental SxTrephination
Amy FayetteNovember 2005
What does this pic represent
• Curve of spee
What is the curve of spee
• The natural slope of the equine dentition
What is the accentuated curve of spee
Are foals born with incisors
• No
When do the incisors come in
• 6 days• 6 weeks• 6 months
When are the incisiors replaced
• 2.5 years• 3.5 years• 4.5 years
How long does it take for a tooth to grow to its full size
• 6 months
How deep are the cups in the teeth
• 6 mm
How many mm are worn off each year
• 2 mm
Are foals born with premolars
• Yes
When are the premolars replaced
• 1st is wolf tooth• 2nd PM: 2 years• 3rd PM: 3 years• 4th PM: 4 years
Are foals born with molars
• No
When do the molars come in
• 1 year• 2 years• 3 years
When are the molars replaced
• They aren’t replaced
How do horses usually grind their food
• Side to side motion of the teeth
What is this called
• Enamel points
Where are enamels points
• Buccal side of maxillary teeth• Lingual side of mandibular teeth
What is floating
• Removing the enamel points
What is this instrument
• Swale’s mouth gag
What is this instrument
• Hausmann mouth gag
What is this instrument
• Speculum
Before floating what should you do
• Look at the teeth and palpate
What is the arrow pointing to
• Hook
What is the arrow pointing to
• Ramp
What procedure is being done here
• Creating bit seats
What are bit seats, what is the function
• Rounding of PM 2 so that if the tongue gets stuck between the teeth and bit it can slip out
What instrument is this
• Tooth cutter
What is wrong with this horse
• Wave mouth
What is wrong with this horse
• Wave mouth and ramps
What is wrong with this horse
• Sheer mouth
What is sheer mouth
• Very severe enamel points
What is this3 year old Arabian gelding
• Retained premolar caps
How do you treat retained premolar caps
• Pull off (screwdriver)
What is this instrument
• Molar forceps
What are the options when removing cheek teeth
• Standing• Repulsion under GA
– Trephination– Sinusotomy– Buccotomy
How do you decide when to use general anesthesia
• Give yourself 15-20 minutes to get it out standing then use GA
What is wrong with this horse
• Diastemma
What is diastema
• A space between teeth in the same dental arch
What are the steps in tooth extraction
• Separate gingiva from tooth• Loosen teeth• Wiggle tooth with a side to side
movement• Extract using a fulcrum• Fill alveolus with PMMA or plaster
of paris
What is the benefit of using plaster of paris instead of PMMA
• PMMA has to be removed, plaster of paris will dissolve on its own
What is this instrument
• Trephine
What is wrong with this horse
• Draining tract at the base of the ear
• Dentigerous cyst
What is a dentigerous cyst
• Dental remnants
What is the treatment for a dentigerous cyst
• Complete surgical excision
What is the prognosis for a dentigerous cyst
• Excellent
What are the landmarks for trephination
• Half way on an imaginary line from the cranial edge of the facial crest to the medial canthus of the eye
• 1 cm ventrally from that line