Ch 66 Dentistry

Question 1

What is the maximla normal gingival sulcus depth in cats and dogs?

Answer 1

Cats: No deeper than 0.5mm
Dogs: No deeper than 3mm

Question 2

What is the dental formula of cats and dogs?
What is the system of naming teeth called?

Answer 2

Modified Triadan System

Question 3

Which jaw contains three-rooted teeth?

Answer 3

maxilla

Question 4

What local anaesthetics can be used for nerve blocks?
How long does each last?
What is the maximum dose?

Answer 4

Bupivicaine 0.5%
- Lasts 6-10hr
- Maximum 2mg/kg in dog and cat

Mepivicaine 2%
- Lasts 4hr
- Maximum dose ?

Lidocaine 2%
- Lasts less than 2hr
- Maximum dose 5mg/kg in dogs, 1mg/kg in cats

Adding buprenorphine or dexmedetomidine may prolong effects for up to or beyond 24hr

Question 5

What nerve blocks can be used in the oral cavity?

Answer 5

Maxillary nerve block (just caudal to the last molar tooth,)
Infraorbital nerve block
Major palatine nerve block
Inferior alveolar nerve block
Middle mental nerve block

Answer 6

Intentional crown reduction with vital pulp therapy (or tooth extraction) is indicated in patients with unilateral mandibulectomy when medial drift of the remaining mandible results in the mandibular canine tooth puncturing the palate

Question 7

What are the 2 main options for mandibulomaxillary fixation?
What are some general recommendations?

less invasive to surgery

Answer 7

• Tape/leather/plastic muzzle
• Bis-acryl composite bridges (most commonly from mandibular to maxillary canines

Should be snug enough to maintain dental interlock for stability but loose enough (gap of 0.5-1cm in cats, 1-1.5cm in dogs) to lap up water and semi-liquid food

Question 8

complications (4)

Answer 8

dermatitis (only for muzzles),
heat prostration,
dyspnea,
aspiration pneumonia

Question 9

What are the two most common forms of interdental wiring?

Answer 9

Stout multiple loop technique
Risdon wiring technique
Atelast 2 teeth per fragment should be included
Can place wire subgingivally to prevent slippage
MUST be combined with composite splint (placed lingually on mandibular teeth, bucally on maxillary teeth)

Question 10

• Healthy teeth in fracture lines should be retained but monitored clinically and radiographically for evidence of periodontal or endodontic disease.
• Teeth with moderate to severe periodontal disease in fracture lines are extracted

Question 11

indications for tape muzzle?

Answer 11

• little fracture segment displacement has occurred and occlusion has not been altered,

Question 12

indications for bis-acryl fixation

Answer 12

• Occlusal alignment and stabilization of caudal mandibular fractures or chronic temporomandibular joint displacement

Question 13

indications for circumferential wiring

Answer 13

Symphyseal separation or fracture near the mandibular symphysis
22 gauge orthopedic wire
removed at approximately 4 weeks

Question 14

indications for Interdental Wiring and Intraoral Splinting

Answer 14