**Core Concept**
Kienböck's disease is a rare osteochondritis dissecans affecting the lunate bone in the wrist, leading to its necrosis and potential dislocation from the surrounding bone.

**Why the Correct Answer is Right**
Kienböck's disease occurs due to a disruption in the blood supply to the lunate bone, typically resulting from a traumatic injury or repetitive stress. This disruption leads to ischemia and subsequent necrosis of the lunate, which can cause it to become detached from the radiocarpal joint. The exact cause of the blood supply disruption is often unclear, but it is thought to be related to the unique anatomy of the lunate's blood vessels.

**Why Each Wrong Option is Incorrect**
**Option A:** Kienböck's disease is not a type of osteoarthritis, as it is primarily an avascular necrosis rather than a degenerative joint disease.
**Option B:** Kienböck's disease does not involve the scaphoid bone, which is affected in other types of osteochondritis dissecans.
**Option C:** Kienböck's disease is not a condition characterized by joint inflammation, as it is primarily a vascular and structural issue.

**Clinical Pearl / High-Yield Fact**
Kienböck's disease often presents with wrist pain and limited mobility, especially in the radial deviation position, and may be misdiagnosed as other wrist conditions, such as scaphoid fractures or osteoarthritis.

**Correct Answer: D. Kienböck's disease.**