"There is a significant association between negative ulnar variance and Kienböck disease, although the majority of people with negative ulnar variance do not have the condition. A causal association is difficult to prove; however, the effectiveness of decompressive procedures such as radial shortening or ulnar lengthening in relieving pain and preventing further collapse of the lunate is supportive 2. Overall, the negative ulnar variance is present as a predisposing factor in around 75% of cases of Kienböck disease."
"There is a significant association between negative ulnar variance and Kienböck disease, although the majority of people with negative ulnar variance do not have the condition. A causal association is difficult to prove; however, the effectiveness of decompressive procedures such as radial shortening or ulnar lengthening in relieving pain and preventing further collapse of the lunate is supportive 2. Overall, the negative ulnar variance is present as a predisposing factor in around 75% of cases of Kienböck disease."
"The pathologic changes are equivalent to those of osteonecrosis of other bones. There is disruption of critical blood supply leading to bone infarction, central necrosis, and surrounding hyperaemia. Microfractures ensue resulting in flattening and deformity of the bone surface."
"There is a significant association between negative ulnar variance and Kienböck disease, although the majority of people with negative ulnar variance do not have the condition. A causal association is difficult to prove; however, the effectiveness of decompressive procedures such as radial shortening or ulnar lengthening in relieving pain and preventing further collapse of the lunate is supportive 2. Overall, the negative ulnar variance is present as a predisposing factor in around 75% of cases of Kienböck disease."