When is surgical extraction indicated?
Big rooted teeth Persistent deciduous teeth Limit risk of jaw fracture To correct/prevent complications
What are the basic flap designs?
Envelope flap Those with release incisions
How should 2 release incisions be cut?
The incisions should be divergent so all of the disease process can be exposed.
What nerve bundles may be liable to damage when performing surgical extraction?
Those arising from the infraorbital foramen and the mental foramen.
How can the infraorbital and mental nerve bundles be protected?
Palpating and pushing them out of the way of the incision site. The mental foramen may even be visualised when creating a flap.
Where is the parotid papilla located?
Above the distal root of the maxillary PM4.
What is the pathogenesis of feline tooth root reabsorption?
Odontoclasts adhere to root surface and resorb it. Granulation tissue may form in the gap, replacing the lost material with bone and cementum like tissue.
What do a & b in the following picture show?
a) Lamina dura - white line around the root, this is alveolar bone
b) Periodontal ligament space - black line aroung the tooth root
What are the classification levels of root reabsorption and what techniques should be used in each one?
Type 1 - periodontal ligament and root still in tact - regular extraction technique
Type 2 - root replacement resorption and some loss of periodontal ligament - surgical technique required
Type 3 - a mix between the two.
When is crown amputation contra indicated?
If there is infection/inflammation at the level of the root
in stomatitis patients where a systemic condition that compromises the immune response (e.g. DM)
When can canine tooth reabsorption be left alone?
If it is gingival/not communicating with the oral cavity. And as long as there is no sign of pain or radiographic signs of inflammtion.
n.b. at the end of the lecture there is extra information on how to perform a surgical extraction