Dentoalveolar Flashcards
How often are third molars impacted
25%
What is the Pell and Gregory classification for third molar impaction
ABC for relationship to 2nd molar occlusal plane. A same level, B above the CEJ, C below the CEJ123 for relationship the anterior ramus. 1 is fully anterior, 2 is for than 50% anterior, 3 is more than 50% within the ramus
What is the Winter’s classification for third molar impaction
The angular relationship of the longitudinal axis of the third molar and occlusal plane
Name at least a few indications for third molar removal
Pericoronitis, caries, periodontal disease, orthodontic needs, pathology, fracture, overlying prosthesis, unexplained pain
Where is the IAN typically located, in relation to the third molar roots
Apical and buccal
On average where is the lingual nerve located at the third molar region?
2.8 mm below the crest and 2.5 mm medial
What is the reported incidence of the lingual nerve at the lingual plate?
22%
What is the Rood classification for IAN and root proximity?
Darkening of root, Deflection of root, Narrowing of root, Bifid root apexDiversion of canal, narrowing of canal, interruption in white line of canal
What hemostatic agent do you use for bleeding?
Collaplug- cross linked collagen. Promotes platelet aggregationSurgicel- oxidized regenerated methylcellulose. Binds platelets
When can a root be left in the sinus?
3 mm or smaller, no associated infection
What is a classification for nerve injury
Seddon classification
What are the three groups of the Seddon classification
- neuropraxia 2. Axonotmesis 3. Neurotmesis
What is allodynia
pain from a non-painful stimulus
What is hyperalgesia?
increased response to stimulation that is normally painful
What is hyperpathia?
Prolonged pain after a stimulus that is longer than anticipated
What is hypoalgesia?
Diminished response to a stimulus that is normally painful
What is hypoesthesia?
Decreased sensitivity to any stimulation
What is paresthesia?
abnormal sensation, is not unpleasant
Tinel sign?
tingling sensation along the nerve distribution
Wallerian degeneration?
distal degeneration of the axon and myelin sheath
What is level A test for in nerve injury?
Spatiotemporal perception. Alpha and beta fibers. Moving brush stroke test. Two point discrimination
What is level B test for in nerve injury?
Static light touch- if skin must be indented then abnormal
What is level C test for in nerve injury?
Nociception- Delta and C fibers, for pain. Delta for hot, C for cold
What gap distance is possible for direct nerve repair in lingual nerve and IAN
1 cm for lingual nerve5 mm for IAN
What do you use to graft a nerve?
Allograft AxoGen advance
What options are available for autograft?
Sural nerve and greater auricular nerve
