ABOS Part I Comprehensive Review - Batch 63

Question 1

A 28-year-old male presents with his third episode of anterior glenohumeral dislocation. Initial imaging in the emergency department confirms the dislocation. Given the patient's history and the provided radiograph, which of the following is the most

Accepted Answer

Order a non-contrast Computed Tomography (CT) scan with 3D reconstructions.

Question 2

Following successful reduction and initial radiographs, a CT scan with 3D reconstructions is obtained for the 28-year-old rugby player. The CT scan, as depicted, reveals significant anterior glenoid bone loss. Based on the case description and the im

Accepted Answer

The Pico method, drawing a best-fit circle over the inferior portion of the intact glenoid.

Question 3

The 28-year-old rugby player is found to have critical glenoid bone loss (>15%) and an 'off-track' Hill-Sachs lesion. An open Latarjet procedure is planned. During the procedure, as depicted in the image, the coracoid graft is being fixed to the ante

Accepted Answer

The graft should be positioned flush with, or slightly medial (1-2 mm) to, the articular cartilage of the anterior glenoid rim.

Question 4

A 28-year-old rugby player with recurrent anterior shoulder instability and an 'off-track' Hill-Sachs lesion, but subcritical glenoid bone loss (<13.5%), undergoes an arthroscopic Bankart repair combined with a remplissage procedure. During the diagn

Accepted Answer

Releasing the tissue inferiorly to the 6 o'clock position.

Question 5

A 28-year-old rugby player undergoes an open Latarjet procedure for recurrent anterior shoulder instability with critical glenoid bone loss. Postoperatively, the patient reports numbness and weakness in the biceps and brachialis muscles. Which of the

Accepted Answer

Musculocutaneous nerve

Question 6

The biomechanical concept of the 'glenoid track' is central to understanding recurrent anterior shoulder instability with bipolar bone loss. For the 28-year-old rugby player, if his intact inferior glenoid width is measured at 25 mm, what is the calc

Accepted Answer

Approximately 20.75 mm

Question 7

The 28-year-old rugby player has a history of three anterior glenohumeral dislocations. The case highlights that 'failure to address bipolar bone loss is the leading cause of surgical failure following isolated arthroscopic soft-tissue stabilization.

Accepted Answer

Critical glenoid bone loss (>15%) and an 'off-track' Hill-Sachs lesion.

Question 8

During the postoperative rehabilitation for an arthroscopic Bankart repair, the patient is in the early protective phase (Weeks 0 to 4). Which of the following is themost appropriateinstruction regarding external rotation?

Accepted Answer

External rotation is strictly limited to 0 degrees.

Question 9

The case describes the Latarjet procedure's 'triple-blocking effect.' Which of the following components contributes to this effect?

Accepted Answer

The dynamic sling effect of the conjoint tendon traversing the subscapularis.

Question 10

A 28-year-old right-hand dominant male presents with his third episode of anterior glenohumeral dislocation. The mechanism of injury involved direct impact to the posterior aspect of the shoulder while the arm was abducted and externally rotated. The

Accepted Answer

Non-operative management would likely result in a recurrence rate approaching 90%.

100 High-Yield Orthopedic MCQs: Shoulder & Elbow | Mock Exam 251

ABOS Part I Orthopaedic Exam Review: Shoulder Instability & PVNS MCQs | Part 22215

Key Takeaway