Dorsal angulation of the articular surface of the radius was measured on the lateral view as the angle between a line connecting the dorsal and palmar lips of the radius and a line perpendicular to the central axis of the radius12.
What is ventral tilt?
Volar tilt is a measurement made on the lateral projection of the wrist as an angle of the distal radial surface with respect to a line perpendicular to the shaft . A normal range is considered at around 10-25° 1 . An angle >25° can lead to dorsal intercalated segment instability 2 .
How is volar tilt measured?
The volar tilt, or volar inclination, is measured on the lateral view . A line perpendicular to the long axis of the radius is drawn, and a tangent line is drawn along the slope of the dorsal-to-volar surface of the radius. The normal angle is 10-25o.
What is dorsal tilt?
Dorsal tilt of a distal radius fracture . This angle is shown in red and goes between: A line drawn between the distal ends of the articular surface of the radius. A line that is perpendicular to the diaphysis of the radius.
How do you measure radial length?
Radial length is measured on the PA radiograph as the distance between one line perpendicular to the long axis of the radius passing through the distal tip of the radial styloid. A second line intersects distal articular surface of ulnar head. This measurement averages 10-13 mm.
How do you calculate radial height?
Traditionally in adults radial height is measured as the distance between two parallel lines . One line perpendicular to the long axis of the radius is drawn along the ulnar aspect of the articular surface and the other line is drawn at the tip of the radial styloid. A normal radial height in adults is 9.917.
What is normal volar tilt?
The volar tilt, or volar inclination, is measured on the lateral view. A line perpendicular to the long axis of the radius is drawn, and a tangent line is drawn along the slope of the dorsal-to-volar surface of the radius. The normal angle is 10-25o .
Is dorsal a top or bottom?
The dorsal (from Latin dorsum ‘back’) surface of an organism refers to the back, or upper side, of an organism. If talking about the skull, the dorsal side is the top . The ventral (from Latin venter ‘belly’) surface refers to the front, or lower side, of an organism.
What does dorsal displacement mean?
Dorsal displacement of the soft palate (DDSP) describes the condition where the soft palate displaces upwards to sit on top of the epiglottis (Figure 2). When this happens the soft palate ends up obstructing the opening to the trachea (larynx), and thereby reduces the amount of air that a horse can take in.
Why is it called a chauffeur’s fracture?
The name originates from early chauffeurs, who sustained these injuries when the car back-fired while the chauffeur was hand-cranking to start the car . The back-fire forced the crank backward into the chauffeur’s palm and produced the characteristic styloid fracture.
What is cortical buckling?
Buckle (torus) fractures occur when the bony cortex is compressed and bulges , without extension of the fracture into the cortex (Figure 1). This type of fracture occurs in about 1 in 25 children and represents 50% of pediatric fractures of the wrist.
What is ulnar tilt?
(a) Ulnar tilt as seen on the PA radiograph; calculated as the angle between the long axis of the ulna and line tangential to proximal surfaces of scaphoid and lunate .
Which nerve is affected in Colles fracture?
Compressive neuropathy is one of the most important complications of Colles’ fractures and usually involves the median nerve .
What does radial length mean?
Radial height (also known as radial length) is the distance between two lines drawn perpendicular to the long axis of the radius on the AP projection from the apex of the radial styloid and level of the ulnar aspect of the articular surface.
What is radial shortening?
Radial shortening is an effective treatment for Kienböck disease in wrists that do not have degenerative changes in adjacent carpal joints. Pain, range of motion, and strength can be expected to improve, but the radiographic appearance of the lunate changes little, if any.
What does positive ulnar variance mean?
Positive ulnar variance describes where the distal articular surface of the ulna is more distal when compared to the articular surface of the radius . It plays important role in wrist pathology such as ulnar impaction syndromes and thinning of the triangular fibrocartilage complex.
