A Smith’s fracture is a break near the end of the radius, the larger of the two forearm bones, where the broken piece shifts toward the palm side of the wrist. It’s sometimes called a “reverse Colles fracture” because the displacement goes in the opposite direction. While a Colles fracture pushes the bone fragment toward the back of the hand (the result of catching yourself with your palm flat), a Smith’s fracture pushes it forward, toward your palm.
How a Smith’s Fracture Happens
The classic cause is falling onto the back of a flexed wrist, meaning your hand is bent forward under your forearm at the moment of impact. This is the opposite of the much more common instinct to catch yourself with an outstretched, extended hand. A direct blow to the back of the wrist can also cause it. Cycling accidents are a well-known scenario: a rider goes over the handlebars and lands on the back of a bent wrist. Falls from height, contact sports, and motor vehicle collisions round out the typical causes.
Because people naturally extend their hands when they fall, Smith’s fractures are far less common than Colles fractures. The mechanism is somewhat unusual, which is why this injury sometimes catches people off guard.
What It Looks and Feels Like
Immediately after the injury, you’ll notice pain, swelling, and tenderness around the wrist. The hallmark sign is a visible deformity sometimes called a “garden spade” shape: the wrist and hand appear to angle downward toward the palm, giving the forearm a scooped appearance when viewed from the side. This is the visual opposite of the “dinner fork” deformity seen in Colles fractures, where the wrist angles upward toward the back of the hand.
Bruising typically develops within hours. You may have difficulty gripping anything or rotating your forearm. In some cases, the displaced bone fragment can press on the median nerve, which runs through the wrist. If that happens, you might notice tingling, numbness, or weakness in the thumb, index finger, and middle finger.
The Three Types
Smith’s fractures are classified into three types based on whether the break extends into the wrist joint:
- Type I: The fracture stays outside the joint surface entirely. This is by far the most common, accounting for about 85% of cases, and generally the most straightforward to treat.
- Type II: The fracture line cuts into the wrist joint at an angle. Sometimes called a reverse Barton fracture, this type makes up roughly 13% of cases and is more complex because the joint surface is disrupted.
- Type III: The fracture extends into the wrist joint in a different orientation and is the rarest and most severe type, making up less than 2% of cases.
The distinction matters because fractures involving the joint surface generally need more aggressive treatment to restore smooth, pain-free wrist motion.
How It’s Diagnosed
Standard X-rays of the wrist, taken from the front and from the side, are usually enough to confirm the diagnosis. The side view is especially important because it clearly shows the direction the broken fragment has shifted. In a Smith’s fracture, the fragment angles toward the palm, which is the defining feature that distinguishes it from other wrist fractures. If the X-ray suggests the fracture extends into the joint, a CT scan may be ordered to map the break more precisely and guide treatment decisions.
Treatment Options
Treatment depends on how stable the fracture is and whether it involves the joint surface. Simple, well-aligned Type I fractures can sometimes be managed with a closed reduction, where a doctor manually repositions the bone, followed by a cast or splint. The wrist is typically immobilized for about six weeks while the bone heals. During this time, follow-up X-rays are taken to make sure the bone stays in the correct position.
Smith’s fractures have a tendency to slip back out of alignment inside a cast, though, which is one reason surgery is frequently recommended. Fractures that are unstable, significantly displaced, or involve the joint surface (Types II and III) almost always require surgical fixation. The standard approach uses a metal plate and screws placed on the palm side of the wrist. These locking plates grip the bone firmly without needing to compress against it, which is especially helpful for people with lower bone density. Placing the plate on the palm side also reduces the risk of irritating the tendons on the back of the hand, a known problem with plates placed on the opposite side.
A major advantage of surgical fixation is that it’s stable enough to allow earlier wrist movement, which reduces stiffness and generally leads to a faster functional recovery compared to prolonged casting.
Recovery and Rehabilitation
Whether you’re treated with a cast or surgery, rehabilitation follows a predictable path through two phases. The first phase begins while the fracture is still healing. Even in a cast, you’ll be encouraged to keep your fingers, thumb, elbow, and shoulder moving. Typical early exercises include gently bending and straightening the fingers, making a loose fist, and moving the shoulder and elbow through their full range. Elevating the arm in the first few days helps control swelling. These simple movements prevent the stiffness that builds quickly when an entire limb sits idle.
The second phase starts once the cast comes off or, after surgery, once your surgeon clears you for more activity. At this point, limited range of motion, reduced grip strength, and lingering pain are normal. Rehabilitation focuses on active wrist and forearm movement, soft tissue stretching, and gentle stabilizing exercises. Grip strengthening and light resistance exercises are typically introduced around three weeks into this phase.
Most people regain functional wrist use within three to four months, though full grip strength can take six months or longer to return. The timeline varies with age, bone quality, the severity of the fracture, and how consistently you follow through with exercises.
Potential Complications
The most immediate concern is median nerve compression from the displaced bone fragment pressing on the nerve as it passes through the wrist. Symptoms include numbness or tingling in the thumb and first two fingers and weakness when pinching. This usually resolves once the fracture is reduced, but persistent nerve symptoms may need additional treatment.
Other complications include stiffness (especially if the wrist is immobilized for a long time), malunion where the bone heals in a less-than-ideal position, and post-traumatic arthritis if the joint surface was involved. Tendon irritation from surgical hardware is possible but less common with palm-side plating. Complex regional pain syndrome, a condition involving disproportionate pain, swelling, and skin changes, occurs in a small percentage of wrist fracture patients and is treated with therapy and pain management if it develops.
Smith’s Fracture vs. Colles Fracture
Both fractures break the same bone in roughly the same spot. The critical difference is direction. In a Colles fracture, the broken piece tilts toward the back of the hand, creating the classic “dinner fork” look. In a Smith’s fracture, it tilts toward the palm. The mechanism mirrors this: Colles fractures come from landing on an extended wrist, Smith’s fractures from landing on a flexed wrist. Colles fractures are significantly more common because extending the hand during a fall is a near-universal reflex. Treatment principles overlap, but Smith’s fractures are more likely to require surgery because of their tendency to lose alignment in a cast.