What Is Kienbock’s Disease?
Your hands and wrists are essential tools that allow you to work, play and perform everyday activities. How well the hand and wrist interact depends on the integrity and function of the ligaments, tendons, muscles, joints and bones.
Problems in any of these can affect upper extremity function, causing disruptions at home and work and negatively impacting quality of life.
The human hand itself is very complex and delicate in structure. At some time in life, you may experience hand or wrist pain.
Kienböck’s disease is a condition where the blood supply to one of the small bones in the wrist, the lunate, is interrupted.
Bone is living tissue that requires a regular supply of blood for nourishment. If the blood supply to a bone stops, the bone can die.
This is called osteonecrosis.
Damage to the lunate causes a painful, stiff wrist and, over time, can lead to arthritis.
What Causes Kienbock’s Disease?
The cause of Kienböck’s disease is not known. Many people with Kienböck’s disease think they have a sprained wrist at first. They may have experienced some form of trauma to the wrist, such as a fall. This type of trauma can disrupt the blood flow to the lunate.
Some things may put you more at risk for the disease. For example, most people have two vessels that supply blood to the lunate, but in some people there is only one source. This may slow the blood flow to the bone. In addition, if the two bones of the forearm (the radius and ulna) are different lengths, extra pressure can be put on the lunate during some wrist motions. Over time, this extra stress on the bone may lead to Kienböck’s disease.
What Are The Symptoms of Kienbock’s Disease?
The most common symptoms of Kienböck’s disease include:
- A painful and sometimes swollen wrist
- Limited range of motion in the affected wrist (stiffness)
- Decreased grip strength in the hand
- Tenderness directly over the bone (on the top of the hand at about the middle of the wrist)
- Pain or difficulty in turning the hand upward
What Are The Treatment Options For Kienbock’s Disease?
Although there is no complete cure for Kienböck’s disease, there are several nonsurgical and surgical options for treating it. The goals of treatment are to relieve the pressure on the lunate and to try to restore blood flow within the bone.
In the very early stage of the disease, pain and swelling may be managed with anti-inflammatory medications, such as aspirin or ibuprofen. Immobilizing your wrist for a period of time can help relieve pressure on the lunate, and your doctor may recommend splinting or casting for 2 to 3 weeks.
It is important to monitor any changes in your symptoms during the early stage of Kienböck’s disease. If the pain is not relieved with simple treatments or it returns, your doctor may recommend surgery.
There are several surgical options for treating Kienböck’s disease. The choice of procedure will depend on several factors, in particular how far the disease has progressed. Additional factors to consider are the patient’s activity level, personal goals, and the surgeon’s experience with the procedures.
Revascularization. In some cases, it may be possible to return the blood supply to the lunate bone. This procedure is called revascularization. It is more successful during early phases of the disease — stages 1 and 2 — before the lunate has significantly deteriorated.
Revascularization involves removing a portion of bone with attached blood vessels from another bone — most often a forearm bone (radius) or an adjacent bone in the hand. This piece of bone with its blood supply is called a vascularized graft. It is inserted into the lunate bone.
To help the bones stay in place during healing, an external fixator may be temporarily applied. This is a metal device that is attached to the outside of the wrist with pins that insert into the bones. It can relieve pressure on the lunate while the graft is healing and restoring a blood supply.
Joint leveling. If the two bones of the lower arm are not the same length, a joint leveling procedure may be recommended. Bones can be made longer using bone grafts or shortened by removing a section of the bone. This leveling procedure reduces the forces that compress the lunate and often stops the progression of the disease.
Proximal row carpectomy. If the lunate is severely collapsed or broken into pieces, it can be removed. In this procedure, the two bones on either side of the lunate are also removed. This procedure, called a proximal row carpectomy, will relieve pain while maintaining partial wrist motion.
Fusion. To ease pressure on the lunate, nearby wrist bones can be fused together to make one, solid bone. A fusion can be partial, in which just some of the bones are fused together. This procedure relieves pain and retains some wrist motion.
If the disease has progressed to severe arthritis of the wrist, fusing all of the bones of the wrist to the radius will relieve pain and and improve hand function. Although all wrist motion is eliminated in a complete fusion, forearm rotation is preserved.
Our team is here for you
When conservative care and treatment is appropriate, we offer the best, least invasive, least aggressive treatment options to relieve your pain and discomfort. When an injury is more serious and conservative care is not an option, our orthopedic surgeons provide the latest in innovative surgical interventions available with the goal of getting you back to the life you love. Wisconsin Bone & Joint physicians offer orthopedic services at three convenient locations in Mayfair, Glendale and Cedarburg.