Orthopedic Surgery Glossary
100 terms total — 24 showing — Last updated 15 Sep 2026
Sagittal Balance
The alignment of the spine in the side-view plane, crucial for proper spinal biomechanics.
radiocapitellar joint
The articulation between the radial head and the capitellum of the humerus in the elbow.
Radiographic Union Scale
A standardized scoring system for assessing fracture healing progress on radiographs.
radiolucent line
Dark line on radiographs indicating areas where X-rays pass through more easily, often suggesting loosening around impla...
reduction maneuver
A specific technique used to restore normal anatomical alignment of displaced bones or joints.
Retrograde Nailing
An intramedullary fixation technique where the nail is inserted from the distal end of a long bone.
Rotator Cuff Tear
A tear in one or more of the four muscles and tendons that stabilize the shoulder joint.
Sagittal Balance
The alignment of the spine in the side-view plane, crucial for proper spinal biomechanics.
Salter-Harris Classification
A system for classifying pediatric growth plate fractures into five types based on fracture pattern.
Scaphoid Nonunion
Failure of a scaphoid fracture to heal, typically after 3-6 months without radiographic union.
scapholunate dissociation
A wrist injury involving disruption of the ligamentous connection between the scaphoid and lunate bones, leading to carp...
scapular winging
Abnormal protrusion of the scapula from the chest wall due to weakness or paralysis of stabilizing muscles.
sclerotic rim
A border of dense, hardened bone tissue visible on radiographic imaging.
Screw Pullout
Mechanical failure where a screw loses purchase and withdraws from bone tissue.
SLAC wrist
Progressive degenerative arthritis pattern following scapholunate ligament injury.
SLAP tear
Superior labrum anterior to posterior tear, an injury to the cartilaginous ring around the shoulder socket.
Spinal Instrumentation
Surgical hardware used to stabilize, correct, or fuse segments of the spine.
Spondylolisthesis
A spinal condition where one vertebra slips forward over the vertebra below it.
Stress Fracture
A small crack in bone caused by repetitive force or overuse, typically occurring in weight-bearing bones.
Stress Shielding
Bone resorption that occurs when rigid implants carry load instead of surrounding bone tissue.
subluxation
Partial dislocation of a joint where bone surfaces remain in partial contact but are not properly aligned.
Surgical Approach
The specific anatomical pathway and tissue planes used to access a surgical site.
TFCC
The triangular fibrocartilage complex, a structure providing stability to the distal radioulnar joint.
tibial tubercle
The bony prominence on the anterior tibia where the patellar tendon attaches.
Trendelenburg Sign
A physical examination finding indicating hip abductor weakness, where the pelvis drops on the unaffected side during si...