A 16-year-old male presents with recurrent lateral patellar dislocations. Clinical examination reveals a positive J-sign, patellar hypermobility, and a positive apprehension test at 20 degrees of knee flexion. Imaging shows significant trochlear dysp

Trochleoplasty and combined MPFL reconstruction with tibial tubercle osteotomy for medialization and distalization.

Which of the following is considered the MOST significant risk factor for recurrent patellar instability?

Severe trochlear dysplasia (Type C or D per Dejour classification).

A patient with a history of recurrent patellar instability undergoes an MRI. The report indicates a TTPG (Tibial Tubercle-Trochlear Groove) distance of 20 mm. What is the clinical significance of this finding?

It suggests a high likelihood of lateral patellar subluxation due to lateralization of the tibial tubercle.

A 12-year-old male with open physes experiences his second lateral patellar dislocation. X-rays show no fracture. MRI confirms MPFL rupture and normal trochlear morphology. He has no significant patella alta or increased TT-TG distance. What is the m

MPFL reconstruction using an all-epiphyseal or transphyseal technique avoiding the growth plate.

A 28-year-old female presents with persistent anterior knee pain and crepitus following an MPFL reconstruction performed 1 year ago for recurrent patellar dislocations. She reports no further dislocations but finds stairs and squatting painful. Physi

Over-constraining of the patella during MPFL reconstruction.

A 15-year-old female presents with bilateral recurrent patellar instability. She has generalized joint hypermobility (Beighton score 7/9) and a family history of patellar dislocations. Imaging shows normal trochlear morphology, minimal patella alta,

Physical therapy focusing on core and quadriceps strengthening, particularly VMO.

In the setting of an acute, first-time traumatic patellar dislocation without osteochondral fragments, what is the most appropriate initial treatment regimen?

Closed reduction, protected weight-bearing, bracing in 20-30 degrees flexion, and supervised physiotherapy.

Which of the following factors is considered to be a strong predictor of failure after MPFL reconstruction?

Uncorrected severe bony malalignment (e.g., TT-TG > 20mm, severe trochlear dysplasia).

ABOS Part I & AAOS OITE Orthopaedic Review: Patellofemoral Instability & Hallux Rigidus MCQs | Part 22225

15 Apr 2026 1 min read 1 Views

Key Takeaway

This ABOS Part I Comprehensive Review module offers 20 advanced MCQs for orthopedic exam prep. It covers patellofemoral instability, including diagnosis, surgical interventions (MPFL reconstruction, osteotomy), and risk factors. Additionally, it addresses hallux rigidus, its classification, and surgical management (cheilectomy, arthrodesis), crucial for mastering AAOS OITE topics.

ABOS Part I Comprehensive Review - Batch 105

This module contains 30 advanced orthopedic multiple-choice questions developed to mirror the American Board of Orthopaedic Surgery (ABOS) Part I and AAOS OITE examinations. Questions are derived directly from high-yield clinical teaching cases.

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ABOS Part I Comprehensive Review - Batch 105

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ABOS Part I & AAOS OITE Orthopedic Review: Sagittal Knee Deformity, Paley's Principles & Osteotomy | Part 21917

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ABOS Part I Orthopaedic Deformity Correction, Limb Reconstruction & Gait Analysis Review | Part 21914

ABOS Part I & AAOS OITE Orthopaedic Review: Patellofemoral Instability & Hallux Rigidus MCQs | Part 22225

Key Takeaway

ABOS Part I Comprehensive Review - Batch 105

Module Results

You Might Also Like

Orthopedic Surgery Board Exam Review: Lower Limb Deformity, Paley's Principles & TKA | Part 22006

ABOS Part I & AAOS OITE Orthopedic Review: Sagittal Knee Deformity, Paley's Principles & Osteotomy | Part 21917

Chapter Index

ABOS Part I Orthopaedic Deformity Correction, Limb Reconstruction & Gait Analysis Review | Part 21914

ABOS Part I & AAOS OITE Orthopaedic Review: Patellofemoral Instability & Hallux Rigidus MCQs | Part 22225

Key Takeaway

ABOS Part I Comprehensive Review - Batch 105

⚠️ Unanswered Questions

Module Results

You Might Also Like

Orthopedic Surgery Board Exam Review: Lower Limb Deformity, Paley's Principles & TKA | Part 22006

ABOS Part I & AAOS OITE Orthopedic Review: Sagittal Knee Deformity, Paley's Principles & Osteotomy | Part 21917

Chapter Index