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Knee Joint

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...

Bones of the Lower Limb: Femur and Patella

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...

Ankle Joint

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...

Joints

Joints

Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit movement and stability, and can be classified based on their structure or function.
Structural joint classifications are based on the material that makes up the joint as well as whether or not the joint contains a space between the bones. Joints are structurally classified as fibrous, cartilaginous, or synovial.
Fibrous Joints Are Immovable
The bones of a...

Structural Joints: Synovial Joints

Structural Joints: Synovial Joints

Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...

Bones of the Lower Limb: Tibia and Fibula

Bones of the Lower Limb: Tibia and Fibula

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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Related Experiment Video

Updated: May 13, 2026

Knee Arthrocentesis in Adults

Knee Arthrocentesis in Adults

Published on: February 25, 2022

[Knee joint infections].

S Oestern¹, D Varoga, R Trompetter

¹Abteilung für Unfallchirurgie, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Arnold-Heller-Straße 7, 24105 Kiel. stefanie_oestern@hotmail.com

Der Unfallchirurg

|March 13, 2013

Summary

This summary is machine-generated.

Knee joint infections are medical emergencies, often caused by Staphylococcus aureus. Prompt antibiotic therapy and surgical intervention are crucial for successful patient outcomes.

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Published on: July 22, 2021

Area of Science:

Orthopedics
Infectious Diseases
Microbiology

Context:

Knee joint infections are a frequent complication following trauma or surgery.
These infections pose an emergency for patients of all ages.
Staphylococcus aureus is the predominant pathogen, implicated in 85-95% of cases.

Purpose:

To highlight the critical nature of knee joint infections.
To emphasize the importance of early diagnosis and intervention.
To underscore the role of Staphylococcus aureus in septic arthritis.

Summary:

Knee joint infection necessitates immediate medical attention.
Treatment involves synovectomy, arthroscopy, and prompt antibiotic administration post-sample collection.
Staphylococcus aureus is the leading causative agent, demanding targeted therapeutic strategies.

Impact:

Early and appropriate treatment significantly improves patient prognosis.
Effective management reduces the risk of long-term joint damage and disability.
Understanding the etiological agents guides optimal antibiotic selection and treatment protocols.