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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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The human leg comprises an intricate system of muscles that facilitate the movement of feet and toes. Within this system, the muscles are categorized into the anterior, lateral, and posterior compartments, each with a unique set of muscles carrying out specific functions.
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The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
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The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
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The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side...
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Does Hallux Valgus Exhibit a Deformity Inherent to the First Metatarsal Bone?

Eduardo Pedrini Cruz1, Felipe Victora Wagner2, Carlo Henning3

  • 1Orthopedist, Traumatologist, and Foot and Ankle Orthopaedic Surgeon, Department of Orthopaedics, Santa Casa de Misericórdia de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.

The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons
|November 5, 2019
PubMed
Summary

Patients with hallux valgus, a common foot deformity, exhibit increased inward bone rotation of the first metatarsal. This study found a significant rotational difference compared to individuals without hallux valgus.

Keywords:
metatarsophalangeal jointpronationrotationtomography

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Area of Science:

  • Orthopedics
  • Podiatry
  • Biomechanics

Background:

  • Hallux valgus is a prevalent foot deformity with persistent challenges in achieving full correction.
  • Hallux pronation is often observed in hallux valgus, particularly in severe cases, but its origin and precise location remain unclear.

Purpose of the Study:

  • To investigate the presence of an inherent rotational deformity in the first metatarsal bone in individuals with hallux valgus.
  • To determine if first metatarsal rotation differs between hallux valgus patients and a control group.

Main Methods:

  • A case-control study involving computed tomography (CT) with multiplanar reconstruction.
  • Analysis of 82 feet in the hallux valgus group and 64 feet in the control group (total 146 feet).
  • Statistical comparison using a mixed model, adjusted for foot and gender, to assess metatarsal rotation differences.

Main Results:

  • A statistically significant difference in metatarsal rotation was observed between the hallux valgus and control groups (p < .001).
  • The hallux valgus group showed a mean first metatarsal rotation of 15.36°, compared to 3.45° in the control group.
  • This represents an average difference of 11.9° in pronation, indicating increased inward rotation in hallux valgus patients.

Conclusions:

  • Patients with hallux valgus demonstrate a distinct, increased bone rotation of the first metatarsal toward pronation.
  • This finding suggests that first metatarsal rotational deformity is a significant component of hallux valgus.
  • Understanding this rotational aspect is crucial for developing effective treatment strategies for hallux valgus.