Orthonotes
Orthonotes
by the.bonestories
v3.0 Fusion
v3.0 Fusion
trauma topic hub

Anderson–D’Alonzo — Odontoid (Dens) Fractures

Type I: tip avulsion (rare, stable). Type II: base of dens (common, unstable, high nonunion). Type III: into C2 body (better healing).

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Type I: tip avulsion (rare, stable). Type II: base of dens (common, unstable, high nonunion). Type III: into C2 body (better healing).
MCQs

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Question 1

Which type of Anderson-D'Alonzo odontoid fracture is characterized by an avulsion of the tip of the dens?

Question 2

What is the most common type of odontoid fracture according to the Anderson-D'Alonzo classification?

Question 3

What is a key characteristic of Type II odontoid fractures?

Question 4

What is the recommended treatment for a stable Type I odontoid fracture?

Question 5

Which ligament is crucial for maintaining the stability of the dens during an odontoid fracture?

Question 6

In which age group is the occurrence of odontoid fractures most common?

Question 7

What is the primary reason for the high non-union rates associated with Type II odontoid fractures?

Question 8

What is the typical mechanism of injury for a Type II odontoid fracture in an elderly patient?

Question 9

Which of the following types of odontoid fractures generally heal well with conservative management?

Question 10

What should be assessed in patients with Type I odontoid fractures to rule out associated injuries?