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As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
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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...
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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...
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Related Experiment Video

Updated: Jul 27, 2025

Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
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Snapping Sternoclavicular Joint.

Paul V Romeo1, Aidan G Papalia1, Neil Gambhir1

  • 1Department of Orthopedic Surgery, New York University (NYU) Langone Orthopedic Hospital, New York, USA.

Cureus
|June 8, 2023
PubMed
Summary
This summary is machine-generated.

A rare case of snapping sternoclavicular joint (SCJ) in a young male resolved without intervention. This benign condition, characterized by clavicle subluxation, did not require surgical treatment and showed no long-term complications.

Keywords:
clavicular pathologydiarthrodial jointsnapping sternoclavicular jointsternoclavicularsternoclavicular joint

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Area of Science:

  • Orthopedics
  • Sports Medicine
  • Pediatric Orthopedics

Background:

  • Snapping sternoclavicular joint (SCJ) is an uncommon condition.
  • It typically presents as a palpable or audible snap during shoulder or arm movement.
  • This case report focuses on a unilateral presentation in a pediatric patient.

Observation:

  • A 14-year-old male experienced unilateral snapping sternoclavicular joint (SCJ).
  • Clinical examination revealed anterior-posterior subluxation of the medial clavicle with specific arm movements.
  • Dynamic ultrasound confirmed joint widening and subluxation in provocative positions.

Findings:

  • The patient's snapping sternoclavicular joint (SCJ) was associated with a specific maneuver involving repetitive external rotation and horizontal arm abduction.
  • Dynamic ultrasound imaging was crucial in visualizing the joint instability during provocative maneuvers.
  • The condition was deemed benign, with no ligamentous laxity identified.

Implications:

  • Snapping sternoclavicular joint (SCJ) is a benign condition that may not necessitate surgical intervention.
  • Conservative management and observation appear effective for pediatric cases.
  • Understanding the dynamic nature of SCJ instability is important for accurate diagnosis.