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Pelvis and Hip

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General Orthopaedics and Basic Science

Part of the book series: Orthopaedic Study Guide Series ((ORTHSTUDY))

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Abstract

The pelvis is formed by the two innominate bones that articulate posteriorly at the sacrum and anteriorly at the pubic symphysis. These attachments form the pelvic girdle, which links the axial skeleton to the lower extremities of the body. Each innominate bone is formed by the fusion of the ischium, ilium, and ischium that occurs during puberty. The fusion of these three bones forms cup-shaped, anteverted (15°) acetabulum that articulates with the head of the femur to form the diarthrodial hip joint.

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Author information

Authors and Affiliations

  1. Department of Orthopedic Surgery, University of Pennsylvania, Philadelphia, PA, USA

    Gregory Pereira, Nikolaos K. Paschos & John D. Kelly IV

  2. Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA

    Nikolaos K. Paschos

Authors
  1. Gregory Pereira
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  2. Nikolaos K. Paschos
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  3. John D. Kelly IV
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Corresponding author

Correspondence to Gregory Pereira .

Editor information

Editors and Affiliations

  1. Harvard Medical School, Boston Children’s Hospital, Boston, MA, USA

    Nikolaos K. Paschos

  2. Royal National Orthopaedic Hospital, Institute of Orthopaedics and Musculo-Skeletal Science, U.C.London, Stanmore, Middlesex, UK

    George Bentley

Review Questions

Review Questions

In a THA with a direct anterior approach what are the two most commonly injured structures?

  1. (A)

    LCFN, sciatic nerve

  2. (B)

    LCFN, femoral nerve

  3. (C)

    Medial femoral circumflex artery

  4. (D)

    Obturator nerve, femoral nerve

What approach to the hip is most likely to injure the obturator nerve?

  1. (A)

    Direct lateral approach (Hardinge)

  2. (B)

    Anterolateral approach (Watson Jones)

  3. (C)

    Anterior approach (Smith Peterson)

  4. (D)

    Posterior approach (Moore or Southern)

Which of the following statements is true?

  1. (A)

    There must be disruption of the ring in at least two places if displacement occurred.

  2. (B)

    Bony articulation is the primary source of stability of the pelvis.

  3. (C)

    The anterior complex ligamentous structures are stronger than the posterior complex ligaments.

  4. (D)

    The Garden classification is the most common system used to classify pelvic ring fractures.

What approach requires release of the short external rotators?

  1. (A)

    Anterolateral approach

  2. (B)

    Anterior approach

  3. (C)

    Posterior approach

  4. (D)

    Medial approach

Incorrect placement of the anterolateral portal in hip arthroscopy is most likely to injure what structure?

  1. (A)

    Femoral nerve

  2. (B)

    Lateral femoral circumflex artery

  3. (C)

    Lateral femoral cutaneous nerve

  4. (D)

    Sciatic nerve

  5. (E)

    Obturator nerve

What is the normal version of the acetabulum?

  1. (A)

    30° of retroversion

  2. (B)

    15° of retroversion

  3. (C)

    15° of anteversion

  4. (D)

    30° of anteversion

What approach to the hip is most likely to damage the sciatic nerve and the inferior gluteal artery?

  1. (A)

    Anterior approach

  2. (B)

    Anterolateral approach

  3. (C)

    Medial approach

  4. (D)

    Lateral approach

  5. (E)

    Posterior approach

What approach to the hip provides optimal exposure to the psoas?

  1. (A)

    Anterior approach

  2. (B)

    Anterolateral approach

  3. (C)

    Medial approach

  4. (D)

    Lateral approach

  5. (E)

    Posterior approach

Which of the following nerves is at risk of being damaged during hip arthroscopy if the anterior portal is incorrectly positioned?

  1. (A)

    Femoral nerve

  2. (B)

    Sciatic nerve

  3. (C)

    Obturator nerve

  4. (D)

    LFCN

What ligamentous complex structures in the pelvis resist external rotation, shear, and excessive flexion?

  1. (A)

    Posterior complex

  2. (B)

    Anterior complex

  3. (C)

    Pelvic floor complex

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Pereira, G., Paschos, N.K., Kelly, J.D. (2019). Pelvis and Hip. In: Paschos, N., Bentley, G. (eds) General Orthopaedics and Basic Science. Orthopaedic Study Guide Series. Springer, Cham. https://doi.org/10.1007/978-3-319-92193-8_2

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  • DOI: https://doi.org/10.1007/978-3-319-92193-8_2

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-92191-4

  • Online ISBN: 978-3-319-92193-8

  • eBook Packages: MedicineMedicine (R0)

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