What causes ulnar minus variance?

What causes ulnar minus variance?

The length is determined by age, genetic factors, load (i.e. gymnasts) and gross elbow pathology. The negative ulnar variance or short ulna has been associated with Kienböck’s disease, avascular necrosis of the scaphoid and scapholunate dissociations.

How is ulnar variance treated?

Ulnar shortening osteotomy (USO) is the standard procedure for correcting positive ulnar variance. Goal of this procedure is to minimize the symptoms by restoring the neutral radio – ulnar variance.

What is ulnar variation?

Ulnar variance (also known as Hulten variance) refers to the relative lengths of the distal articular surfaces of the radius and ulna. Ulnar variance may be: neutral (both the ulnar and radial articular surfaces at the same level) positive (ulna projects more distally) negative (ulna projects more proximally)

Is Kienböck’s disease curable?

There is no cure for Kienbock’s disease, but prompt treatment can help you preserve wrist function and relieve pain.

What is ulnar minus deformity?

Negative ulnar variance is a condition in which the ulna is relatively shorter than the radius at the carpus. It was found in 21% of 203 normal wrists.

What is ulnar variance on xray?

Ulnar variance is a measurement that is taken from X-rays to define the length of the ulna bone relative to the radius. This is an important measurement because the dynamics of the wrist are dependent on the ulna and radius translating force through the wrist.

What is normal ulnar variance?

– mean ulnar variance is 0.9 mm (range: 4.2 to 2.3 mm); – functional anatomy: – w/ neutral variance, 80% of load is born by radius and 20% by ulna; – 2.5 mm increase in ulnar varience will increase load borne by ulno-carpal joint from 18% to 42%;

Is Kienbock disease an autoimmune disease?

Lupus: It is a long-term autoimmune disease and in this condition, the immune system becomes hyperactive and attacks normal, healthy tissues. Lupus is often associated with Kienböck’s disease.