Anatomy Of The Sternoclavicular Joint

Courtesy: Prof Nabil Ebraheim, University of Toledo, Ohio, USA

ANATOMY OF STERNOCLAVICULAR JOINT

• Composed Of proximal end of clavicle and manubrium sterni
• Clavicle in turn is supported by the costal cartilage of first rib
• Type : Gliding type/ saddle joint/ synovial joint
• Articular surface : proximal end of clavicle + clavicular notch of manubrium sterni

Stability :

A. Sternoclavicular ligaments –

• two Parts – anterior and posterior
• Connect clavicle to manubrium
• Posterior SC ligament is important to anteroposterior stability

B. Costoclavicular ligaments –

• connect Costal cartilage to inferior surface of clavicle
• Important for medial stability
• It is preserved during resection of clavicle
• ( < 15mm resection is allowed at medial end of clavicle)

Movement at SCJ is limited.