Can a Displaced Fracture Heal Without Surgery?

Many displaced fractures heal without surgery, and non-operative treatment remains the default for a surprisingly large share of them. A study of fracture management patterns found that roughly three-quarters of all fractures were treated without an operation, including about two-thirds of adult fractures and over 90% of children’s fractures. The catch is that “displaced” covers a wide spectrum, from a fragment that shifted a few millimeters to bones that barely overlap at all. Whether your particular fracture can skip the operating room depends on which bone broke, how far the pieces moved, whether a joint surface is involved, and how old you are.

How a Displaced Fracture Heals on Its Own

When a bone breaks and the fragments shift out of alignment, the body kicks off a repair sequence that unfolds in overlapping phases. First comes inflammation: blood pools at the fracture site and forms a clot, which recruits immune cells and signaling molecules. Over the following weeks, soft cartilage-like tissue called callus bridges the gap between fragments. That callus gradually hardens into woven bone, and over months to years the bone remodels itself, reshaping along the lines of mechanical stress until it approaches its original architecture. Researchers have identified roles for multiple transcription factors in mediating the reactive, reparative, and remodeling phases of this process, and the biology is more complex than a simple “glue the pieces back together” story.¹

The key insight is that bone does not need the fragments to be perfectly aligned to heal. Unlike a broken ceramic mug that needs its edges matched precisely, a bone can bridge a gap and then remodel the result into something functional. The question is whether the final shape is good enough for normal use, or whether the misalignment leaves you with a stiff joint, a visible deformity, or chronic pain.

Why Children Get Away With More

Growing bones have a built-in advantage that adults do not share. In children, the remodeling process can actually straighten out a fracture that healed crooked, restoring alignment over time in a way that makes an anatomically perfect reduction less critical.² This remodeling capacity is strongest in younger children and gradually diminishes as they approach skeletal maturity. It also varies by location: lower-extremity fractures tend to remodel more reliably than upper-extremity ones.

A good example is the displaced distal radius fracture, one of the most common childhood injuries. In a study of children treated with closed reduction (manually repositioning the bone) and casting, about 85% did not need any further intervention. Even among those whose fractures redisplaced somewhat after being set, the vast majority ended up within acceptable limits for remodeling, with over 96% of cases showing only slight residual displacement.³ A recent large randomized trial in children with severely displaced distal radius fractures found that pain differences between surgical and non-surgical groups were tiny and below the threshold considered clinically meaningful at every follow-up point from six weeks to twelve months.⁴

Redisplacement after initial reduction is the main worry with conservative treatment in kids. A meta-analysis confirmed that fracture redisplacement is common after cast immobilization of displaced distal radius fractures in children, and while pinning the fragments with small wires can prevent this, clear guidelines for when to pin versus when to just cast are still lacking.⁵ In practice, most pediatric orthopedists accept a fair amount of imperfection in alignment, trusting the child’s growth to clean things up.

Location Makes the Difference in Adults

In adults, the story is more nuanced and depends heavily on which bone is broken. Some bones heal reliably with conservative care even when displaced; others are notorious for failing without surgical stabilization. Three of the most studied fracture sites illustrate the range.

The Collarbone

Displaced midshaft clavicle fractures have been treated with slings and time for generations, and for many patients this still works. A systematic review and meta-analysis found that surgery significantly reduced nonunion rates compared to non-operative treatment, and patients who had surgery showed modestly better early shoulder function and cosmetic satisfaction. But long-term functional scores were comparable between the two groups, and surgery carried higher risks of hardware-related complications and reoperation.⁶ A second systematic review echoed this pattern: operative treatment offered superior early outcomes and faster healing on X-ray, but long-term patient satisfaction was similar, and surgical patients faced more reoperations, mostly because plates and screws can irritate overlying tissue.⁷

A large multicenter randomized trial (the Clavicle Trial) put firmer numbers on the nonunion question. At nine months, the nonunion rate was about 11% in the nonoperative group versus under 1% in the operative group, a meaningful gap. Yet early functional scores, while favoring surgery at six weeks and three months, converged later.⁸ So a displaced clavicle fracture can absolutely heal without surgery, but roughly one in nine patients who skip the operation may end up with a nonunion, and whether that matters depends on how active you are and how much the cosmetic bump bothers you.

The Wrist

Displaced distal radius fractures in adults are typically managed with closed reduction and casting as a first step.⁹ In older adults, the results of conservative treatment are often surprisingly good. One randomized trial comparing surgery to casting in elderly patients found that at one year, there was no difference in disability scores or pain between the two groups, and wrist extension differences that existed at six months had disappeared.¹⁰ Another trial in elderly patients with dorsally displaced intra-articular fractures found that while the plating group had better function at three months, the two groups were equivalent at six and twelve months, with no lasting difference in range of motion or grip strength.¹¹

The pattern that keeps emerging across these wrist studies is that surgery makes X-rays look better and gives a short-term functional edge, but the patient’s actual experience at one year is often indistinguishable from the non-surgical group. This is especially true in older adults with lower physical demands.

The Upper Arm

Humeral shaft fractures are the classic testing ground for functional bracing, a technique where a snug adjustable splint allows the arm to move while gravity and muscle tension gradually align the fragments. A review of clinical studies found that braced humeral shaft fractures healed in an average of about eleven weeks, with a union rate around 94.5%. Residual angulation rarely exceeded 10 degrees, and full shoulder and elbow motion was recovered in roughly 80% to 85% of patients.¹²

However, more recent data has tempered the optimism. A study of 65 patients treated with functional bracing found that about a third experienced delayed healing or nonunion, and fractures displaced more than 30 mm or angled more than 30 degrees were at significantly higher risk of failing.¹³ The FISH randomized trial compared surgery to bracing for closed displaced humeral shaft fractures and found no significant difference in disability scores at twelve months, but 25% of the bracing group developed nonunions and 30% required secondary surgery during the follow-up period.¹⁴ The takeaway is that bracing works well when it works, but the failure rate for substantially displaced humeral shaft fractures is not trivial.

What Makes a Fracture Fail to Heal

When a displaced fracture treated conservatively does not heal, the result is a nonunion, defined loosely as a fracture that has stopped progressing toward union. The risk factors are a mix of biological and mechanical. High-energy injuries that strip away the soft tissue around the bone compromise blood supply, and without adequate blood flow, the healing process stalls. Contamination and infection compound the problem further.¹⁵

Other factors that tilt the odds toward nonunion include smoking (which constricts blood vessels and impairs oxygen delivery to the fracture site), diabetes, use of anti-inflammatory medications during the early healing phase, and continued mechanical instability at the fracture. Soft tissue trapped between the bone ends can also physically block healing; ultrasound has been explored as a way to diagnose this kind of interposition without surgery.¹⁶

The functional consequences of nonunion can vary. For clavicle fractures, one study found that patients who achieved solid union had dramatically better disability scores and shoulder function than those who developed nonunion or malunion. The mean disability score in the union group was about 8 out of 100 (very mild difficulty), versus about 20 in the nonunion group.¹⁷ That said, a broader review across fracture types noted that nonunion after conservative treatment often had a limited impact on functional results, and that in many trials, the lower nonunion rates from surgery were offset by complications from the operation itself.¹⁸

When the Joint Surface Is Broken

Fractures that extend into a joint raise a different set of concerns. A misaligned joint surface creates uneven wear during movement, which can accelerate the development of post-traumatic arthritis. A three-year follow-up of nonoperatively treated distal radius fractures found that about a third healed with meaningful dorsal angulation, and among those, some showed radiological signs of post-traumatic arthritis on later X-rays.¹⁹

But the relationship between joint incongruity on X-ray and actual symptoms is not as straightforward as you might expect. A review of the evidence found that different joints tolerate articular step-offs to very different degrees. In the knee’s tibial plateau, for instance, the joint can tolerate a surprising amount of surface irregularity, and factors like joint stability and preservation of the meniscus mattered more for long-term outcomes than the step-off itself. In the hip socket, by contrast, restoring the weight-bearing surface was more clearly linked to better results. For the wrist, although gaps and step-offs correlated with radiographic arthritis, the clinical impact of those X-ray changes over five-plus years was not convincingly demonstrated.²⁰ The upshot: a joint fracture that looks rough on imaging does not automatically mean you will have a painful joint years later, but some joints are less forgiving than others.

Rehabilitation After Conservative Treatment

Choosing not to operate does not mean doing nothing. Rehabilitation after a conservatively managed displaced fracture follows a carefully staged progression. For proximal humerus fractures (the shoulder end of the upper arm bone), a systematic review of 40 studies covering over 3,500 patients found considerable variation in protocols, but a general pattern emerged: sling use for about three weeks, gentle pendulum exercises starting within the first day or two, passive range-of-motion exercises beginning within the first few days, then gradual advancement to active movement at around three weeks and strengthening at six weeks.²¹

A randomized trial protocol for displaced proximal humerus fractures managed without surgery used a standard approach of 14 days of immobilization followed by advice on returning to daily activities, then compared structured physiotherapy in the community against a less formal rehabilitation path.²² The fact that such a trial exists highlights an underappreciated point: when surgery is skipped, the quality and timing of rehabilitation may be the single biggest modifiable factor in how well you recover. Early mobilization prevents stiffness; too-aggressive mobilization can displace the fracture further. Getting the balance right matters more than most patients realize.

Can Anything Speed Up Healing Without Surgery

Low-intensity pulsed ultrasound (LIPUS) is a non-invasive technology that uses sound waves to stimulate bone healing. It has been shown to accelerate bone formation through interactions with cells and tissues at the fracture site, with minimal thermal effects.²³ A systematic review and meta-analysis of randomized controlled trials found that LIPUS and pulsed electromagnetic field stimulation significantly accelerated the time to radiological union in non-operatively treated fractures and upper-limb fractures specifically, and may shorten time to clinical union in acute shaft fractures.²⁴

The evidence is encouraging but not earth-shattering. LIPUS devices are available commercially and some insurers cover them for fractures at high risk of delayed healing, like tibial shaft fractures in smokers. They are not a substitute for adequate immobilization or, when needed, surgery. Think of them as a potential accelerator for the biology that is already happening, not a rescue tool for a fracture that fundamentally needs fixation.

The Money Side of the Decision

Cost is rarely the first thing patients think about when they are sitting in the emergency department with a broken bone, but it shapes how healthcare systems approach fracture management. For elderly patients with substantially displaced intra-articular distal radius fractures, a trial-based economic evaluation found that cast treatment was slightly cheaper than surgery from a societal perspective, with an estimated difference of about €81 in favor of casting, though the confidence interval was wide enough to overlap zero.²⁵ Given that clinical outcomes were similar, casting in elderly wrist fracture patients is essentially equivalent care at slightly lower cost.

The math gets more interesting for clavicle fractures. A decision analysis found that operative treatment was more cost-effective than nonoperative management in the majority of simulated scenarios, with the cost per quality-adjusted life year falling well below standard willingness-to-pay thresholds. But the advantage depended on surgical benefits persisting for at least three years.²⁶ In younger, active patients who would lose income during a prolonged recovery and face the functional costs of a potential nonunion, surgery can be the more economical choice overall. In older patients with lower demands, the calculus often flips.

How the Decision Actually Gets Made

The choice between surgery and conservative care is rarely black and white, and the trend in orthopedics is toward shared decision-making, where the surgeon lays out the tradeoffs and the patient’s own priorities weigh heavily. A study of patients with displaced midshaft clavicle fractures found that patients generally reported high levels of shared decision-making, though not everyone ended up in the role they preferred during the process.²⁷

A discrete choice experiment exploring patient preferences for fracture management found that patients weigh multiple attributes simultaneously: not just the risk of needing a second surgery, but also pain severity, hospital stay length, how quickly they can walk independently, and even where they get discharged to afterward.²⁸ People do not make fracture decisions on union rates alone. A manual laborer who cannot afford twelve weeks off work may reasonably choose surgery for a clavicle fracture to get faster return to function, while a retired person with the same fracture pattern may prefer to avoid the operating room entirely. Neither decision is wrong; they reflect different values applied to the same medical evidence.

Fractures That Genuinely Need an Operation

For all the cases where conservative treatment works, some displaced fractures are genuinely dangerous to leave alone. Open fractures, where the bone has broken through the skin, almost always require surgical cleaning and stabilization to prevent infection. Fractures with significant vascular or nerve injury need operative exploration. Unstable fractures around the hip in elderly patients carry life-threatening risks if not fixed promptly, because prolonged immobilization leads to blood clots, pneumonia, and deconditioning.

Intra-articular fractures of the hip socket and the ankle joint tend to be less forgiving of residual displacement than the wrist or knee. Fractures that involve large joint surfaces and remain substantially displaced after attempted reduction are poor candidates for conservative treatment, because the joint mechanics are permanently altered in ways that remodeling cannot correct in adults. Fractures with soft tissue interposition, where muscle or other tissue has been trapped between the bone ends, may physically prevent healing no matter how long you wait. These are situations where the risks of not operating clearly outweigh the risks of surgery.