A3-year-old castrated male Golden Retriever was evaluated because of progressive vestibular ataxia and signs of cervical pain of 2 weeks’ duration following running into a tree. On initial neurologic assessment, the dog had moderate vestibular ataxia with leaning and listing to the left side, a mild left-sided head tilt, and resistance to ventral flexion of the neck. Results of a CBC and serum biochemical profile were unremarkable other than a mild hypercholesterolemia (412 mg/dL; reference range, 120 to 310 mg/dL). Further endocrine testing to rule out other causes of hypercholesterolemia was not performed.
Etiologic diagnosis—Considering the dog's clinical signs,
Objective—To determine whether anesthesia of the
infraorbital and inferior alveolar nerves abolishes
reflex-evoked muscle action potentials (REMP) during
tooth-pulp stimulation in halothane-anesthetized
Animals—8 healthy adult cats.
Procedure—In halothane-anesthetized cats, an
anodal electrode was attached to the tooth to be stimulated
and a platinum needle cathodal electrode was
inserted in adjacent gingival mucosa. Cathodal and
anodal electrodes were moved to the upper and
lower canine, upper fourth premolar, and lower first
molar teeth for stimulation; baseline REMP was
recorded. A 25-gauge 1-cm needle was inserted 0.5
cm into the infraorbital canal. A 25-gauge 1-cm needle
was inserted 1 cm rostral to the angular process of
the ramus, and advanced 0.5 cm along the medial
aspect. Chloroprocaine was injected at each site.
Each tooth was stimulated every 10 minutes for 90
Results—REMP was abolished within 10 minutes for
all upper teeth, except for the upper canine tooth in 1
cat, and abolished within 10 minutes for lower teeth
in 4 cats. In 1 cat, REMP was not abolished in the
lower first molar tooth. In 3 cats, REMP was not abolished
in the lower canine and first molar teeth. At 90
minutes, REMP was restored for all teeth except the
lower canine tooth in 1 cat, for which REMP was
restored at 120 minutes.
Conclusions and Clinical Relevance—Regional
anesthesia of the infraorbital and inferior alveolar
nerves may provide dental analgesia in cats. (Am J
Vet Res 2000;61:1245–1247)