Scaphoid Fractures

What Is a Scaphoid Fracture?

The scaphoid is one of eight small bones that make up the wrist. It sits at the base of the thumb side of the wrist, in the hollow area known as the anatomical snuffbox. Unlike the other wrist bones, the scaphoid bridges the two rows of carpal bones, connecting the proximal row, which is closer to the forearm, with the distal row, which is closer to the hand. This unique position makes the scaphoid critical for wrist stability and motion, but it also puts the bone at higher risk for injury.

When you fall on an outstretched hand, force is transmitted through the wrist and can break the scaphoid. The blood supply to this bone is precarious, entering only at certain points. If the bone breaks in the wrong location, the blood supply to part of the bone can be interrupted, which makes healing difficult or impossible without treatment. This is why scaphoid fractures require prompt diagnosis and appropriate management to prevent long-term complications.

Symptoms

The most common symptom is pain on the thumb side of the wrist, particularly in the snuffbox area at the base of the thumb. The pain typically develops within days of a fall onto the outstretched hand. Because there's usually no visible deformity and the wrist still moves, many people assume they've just sprained their wrist and don't seek treatment right away. This is one reason scaphoid fractures are often diagnosed late.

Swelling and bruising may or may not be present. The wrist often looks relatively normal on the outside, which makes the injury deceptive. You might notice pain with gripping, lifting, or putting weight through your hand. Pushing up from a chair or doing pushups can be particularly uncomfortable. The pain may improve somewhat after the first few days, leading people to think the injury is healing, but persistent tenderness over the scaphoid bone is a key sign that something more serious may be wrong.

Causes & Risk Factors

Scaphoid fractures almost always result from falls onto an outstretched hand. When you extend your arm to catch yourself during a fall, your hand typically lands with the wrist bent backward. The force of the fall travels through the wrist and can fracture the scaphoid bone. This injury is common in young, active people who participate in sports, skateboarding, rollerblading, or other activities where falls are possible.

Motor vehicle accidents, particularly motorcycle crashes, can also cause scaphoid fractures. Any activity that puts you at risk for falling and instinctively catching yourself with your hand increases the chance of this injury. Athletes in contact sports, cyclists, and people who work at heights are at higher risk. Even simple slips on wet or icy surfaces can result in a scaphoid fracture.

While anyone can break their scaphoid, these injuries are most common in people between the ages of 20 and 40. They occur less frequently in very young children because their bones are more flexible, and less commonly in older adults who tend to break their radius instead when falling. Men experience scaphoid fractures more often than women, likely due to higher participation in activities that put them at risk for falls.

Diagnosis

If you have wrist pain after a fall, especially with tenderness in the snuffbox area at the base of the thumb, see a hand surgeon promptly. During the examination, your surgeon will press on specific areas of the wrist to pinpoint where the pain is worst. Tenderness directly over the scaphoid bone raises strong suspicion for a fracture, even if X-rays look normal initially.

X-rays are the first imaging study obtained, but scaphoid fractures don't always show up immediately on X-rays. A break that can't be seen on X-ray yet is called an occult fracture. If your examination suggests a scaphoid fracture but X-rays are negative, your surgeon will likely place you in a splint to protect the bone and recommend follow-up evaluation in one to two weeks. By then, some healing changes may make the fracture visible on repeat X-rays.

Other imaging studies can diagnose scaphoid fractures when X-rays are unclear. CT scans provide detailed images of the bone and can show fractures that aren't visible on regular X-rays. MRI can detect both bone and soft tissue injuries. Bone scans can identify fractures early but are less commonly used now that CT and MRI are widely available. Prompt diagnosis is important because delayed treatment increases the risk of complications.

Treatment Options

Treatment depends on the location of the fracture, whether the bone fragments are displaced, and how soon after injury you seek treatment. Non-displaced fractures, where the bone pieces haven't shifted out of position, can often be treated successfully with casting. The cast immobilizes the wrist and thumb to allow the bone to heal. Casting typically continues for six to twelve weeks, though some fractures take longer to heal.

The location of the fracture within the scaphoid affects healing time and success. Fractures in the middle and distal portions of the bone, which have better blood supply, tend to heal more reliably with casting. Fractures through the proximal pole, which has limited blood supply, are more likely to require surgery. Even stable-appearing fractures in certain locations may benefit from surgical fixation to speed healing and allow earlier return to activity.

Surgery is recommended when the fracture is displaced, meaning the bone fragments have shifted position. Displaced fractures won't heal properly without surgical realignment and stabilization. Surgery is also considered for fractures in areas with poor blood supply, for people whose occupation or lifestyle makes prolonged casting impractical, and for athletes who want to return to sports sooner. Some people choose surgery for non-displaced fractures to avoid months in a cast and return to normal activities more quickly.

If a scaphoid fracture is diagnosed late or doesn't heal despite treatment, additional surgery may be needed. Non-union, where the bone fails to heal, can lead to chronic pain and eventually arthritis. Treatment for non-union often involves bone grafting to stimulate healing, sometimes combined with specialized fixation techniques. The success rate for treating non-union is lower than for treating acute fractures, which is why early diagnosis and appropriate initial treatment are so important.

Surgery: What to Expect

Scaphoid fracture surgery is typically performed as an outpatient procedure under local anesthesia, with sedation available for select cases if needed. The operation usually takes 45 minutes to an hour. A screw is placed through the bone to hold the fracture fragments in their proper position while healing occurs. The screw can often be inserted through a very small incision using fluoroscopy, a type of real-time X-ray guidance.

For some fractures, a larger open incision is needed to visualize the bone directly, remove any scar tissue, and ensure perfect alignment before placing the screw. If the fracture is old or has failed to heal with previous treatment, bone graft may be added to stimulate healing. The graft can come from your own bone, usually from the radius or hip, or from donor bone.

After surgery, your wrist is placed in a splint for comfort and protection. Many surgeons allow earlier motion and less extensive immobilization after screw fixation compared to cast treatment alone. The screw provides rigid internal fixation that allows some people to start gentle motion within weeks, though the bone still needs months to fully heal.

Recovery

Recovery time depends on the fracture location, treatment method, and your individual healing capacity. With casting alone, you'll typically wear the cast for six to twelve weeks or longer. After the cast is removed, stiffness is common and expected. You'll receive a home exercise program with exercises to gradually restore wrist motion and strength. Most people can manage their recovery with these home exercises, though formal hand therapy may be beneficial if significant stiffness develops.

After surgery, the timeline varies based on your surgeon's protocol and the specifics of your injury. Some people can begin gentle motion within a few weeks, while others need more extended protection. Return to activities is gradual. Light activities may be allowed around six to eight weeks after surgery, but the bone typically needs three to four months to fully heal. Impact activities and contact sports are usually restricted for four to six months.

Not all scaphoid fractures heal perfectly, even with appropriate treatment. Complications can include non-union where the bone fails to heal, avascular necrosis where part of the bone dies from lack of blood supply, and arthritis that develops years later. Following your surgeon's treatment recommendations and restrictions carefully gives you the best chance for successful healing and helps prevent these complications. Most people who are treated appropriately can expect good outcomes and return to their normal activities.

When to See a Specialist

If you have wrist pain after a fall, particularly at the base of your thumb, don't assume it's just a sprain. Prompt evaluation by a hand surgeon can identify a scaphoid fracture early when treatment is most effective. Even if initial X-rays are normal, persistent tenderness over the scaphoid bone warrants continued protection and follow-up imaging. Delayed diagnosis and treatment increase the risk of complications and may lead to more complex problems down the road.

Dr. Lackey specializes in diagnosing and treating scaphoid fractures with both non-surgical and surgical approaches. Early evaluation and appropriate treatment provide the best opportunity for complete healing.