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Related Concept Videos

Functional Classification of Joints01:09

Functional Classification of Joints

Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses  or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An immobile...
Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

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 neck...
Classification of Bones01:18

Classification of Bones

The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
Long and Short Bones
The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The long...
Ankle Joint01:10

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

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.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...

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Related Experiment Video

Updated: May 17, 2026

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022

Acetabular fracture types vary with different acetabular version.

Clément M L Werner1, Carol E Copeland, Thomas Ruckstuhl

  • 1Division of Trauma Surgery, University Hospital Zurich, Raemistrasse 100, 8091, Zurich, Switzerland. clement.werner@usz.ch

International Orthopaedics
|October 30, 2012
PubMed
Summary

Acetabular version influences fracture patterns in acetabular fractures. Anteverted versions correlate with anterior fractures, while retroverted versions link to posterior fractures, aiding trauma analysis.

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Method and Instrumented Fixture for Femoral Fracture Testing in a Sideways Fall-on-the-Hip Position
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Method and Instrumented Fixture for Femoral Fracture Testing in a Sideways Fall-on-the-Hip Position

Published on: August 17, 2017

Related Experiment Videos

Last Updated: May 17, 2026

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022

Method and Instrumented Fixture for Femoral Fracture Testing in a Sideways Fall-on-the-Hip Position
06:58

Method and Instrumented Fixture for Femoral Fracture Testing in a Sideways Fall-on-the-Hip Position

Published on: August 17, 2017

Area of Science:

  • Orthopedic surgery
  • Trauma biomechanics
  • Radiology

Background:

  • Acetabular fractures result from high-energy trauma.
  • Biomechanical factors influencing fracture patterns are not fully understood.
  • The role of acetabular version in fracture type remains unclear.

Purpose of the Study:

  • To investigate the influence of acetabular version on acetabular fracture patterns.
  • To clarify the relationship between acetabular version and fracture type.

Main Methods:

  • Retrospective analysis of 192 acetabular fracture cases.
  • Assessment of acetabular retroversion using radiographic signs (crossover, posterior wall, ischial spine).
  • Measurement of axial acetabular version using computed tomography (CT) scans.
  • Statistical analysis correlating fracture type (Letournel classification) with acetabular version.

Main Results:

  • A significant difference in acetabular version (equatorial edge angle) was observed between anterior (19.93°) and posterior (17.53°) acetabular fractures on CT scans (p=0.029).
  • No significant difference in acetabular version was detected using conventional radiographs.
  • CT measurements revealed a correlation between acetabular version and fracture location.

Conclusions:

  • Acetabular version in the axial plane significantly impacts acetabular fracture patterns.
  • Anteverted acetabula are associated with anterior fracture types.
  • Retroverted acetabula are associated with posterior fracture types.