What Happens If You Fall After Hip Replacement?

A fall after hip replacement can range from a minor scare with nothing more than a bruise to a serious medical event involving a broken bone around the implant, a dislocated joint, or both. Roughly one in five patients falls at least once in the first year after surgery, and the consequences depend heavily on how you land, the strength of the bone around your implant, and how well the prosthesis was fixed in place. The picture is more complicated than most patients expect, because the replaced hip introduces injury patterns that simply don’t exist in a natural joint.

How Common Are Falls After Hip Replacement

Falls in the first year after a total hip replacement are not rare events. A prospective study tracking patients over twelve months found that about 20% experienced at least one fall, with the majority of those falls happening within the first six months.¹ A separate study focusing on older adults found an even higher rate: 42% of participants reported at least one fall in the year after discharge, accumulating 140 total falls among 67 people. The fall rate peaked around month five, and about half of all falls had occurred by the end of month six.² Among those who fell, about two-thirds of the falls caused some kind of injury, including nine fractures in that cohort alone.

The variation between these studies matters. The first tracked a broader age range; the second focused specifically on older adults, who are inherently at higher fall risk due to muscle weakness, balance problems, and medication side effects. If you’re younger and otherwise fit, your personal risk is lower than those headline numbers. But even in the more optimistic study, one in five is not a negligible number, and it underscores why fall prevention deserves serious attention after surgery.

Periprosthetic Fractures, the Signature Injury

The injury that orthopedic surgeons worry about most after a fall is a periprosthetic fracture, meaning a break in the femur (thighbone) right around or just below the metal stem of the implant. This is a fundamentally different problem from breaking a normal hip. The metal stem changes how forces travel through the bone, and it complicates both the fracture pattern and the repair. One study found that 94% of periprosthetic fractures after hip replacement were caused by simple falls from standing height, not high-energy accidents like car crashes.³ In other words, an ordinary stumble can be enough.

Surgeons classify these fractures using a system called the Vancouver classification, which looks at three things: where the break is relative to the implant, whether the metal stem is still firmly fixed inside the bone, and how strong the remaining bone stock is.⁴ These three factors drive the entire treatment decision. A crack near the top of the femur with a solid, well-fixed stem is a very different problem from a fracture around a loose stem in weak bone. Treatment ranges from plating the bone around the existing implant to completely replacing the femoral component with a longer stem that bypasses the fracture.

When the implant is still solidly fixed (a type B1 fracture in the Vancouver system), surgeons usually stabilize the bone with plates and cables while leaving the prosthesis in place. A review of these fractures noted, however, that in up to 20% of cases that initially appear stable on imaging, the stem turns out to be loose during surgery, which partly explains why some plate fixations fail.⁵ When the stem is clearly loose, the conventional wisdom has been to revise it with a new, longer implant. But emerging evidence suggests that fixing the fracture without revising the stem can sometimes work even when there’s some looseness, provided the bone quality allows a stable repair.⁶

Fixation Versus Revision Surgery

If a periprosthetic fracture does require an operation, there are broadly two paths: fixing the bone around the existing implant (open reduction and internal fixation, or ORIF) or replacing the femoral component entirely (revision surgery). For a patient lying in a hospital bed hearing these options, the distinction is not academic. A large multicentre study comparing the two approaches found that revision surgery carried a two-year reoperation rate more than double that of fixation (about 15% versus 7%), required more blood transfusions, and resulted in higher rates of local complications. Two-year survival was also lower in the revision group.⁷

A separate retrospective study echoed these findings, reporting a one-year mortality rate of roughly 26% after revision compared to 10% after fixation, with the overall complication rate nearly four times higher in the revision group.⁸ These numbers sound alarming, but context is important. Revision surgery tends to be performed on more complex fractures where the stem is loose or the bone is severely compromised, so the patients in the revision group often start from a worse position. Still, the data makes a strong case for preserving a well-fixed implant whenever possible rather than defaulting to a full revision.

Dislocation After a Fall

Besides fracturing the bone, a fall can knock the ball of the prosthesis out of its socket. Dislocation is the second major complication surgeons worry about, and it can happen even without a fracture if the fall forces the hip into an extreme position. The risk of dislocation in general is shaped partly by the surgical approach used during the original operation. A meta-analysis pooling data from roughly five million hip replacements found that a posterior approach carried about double the dislocation risk compared to an anterolateral approach, while a direct anterior approach lowered the risk compared to posterior. Surgeons who repaired the short external rotators and capsule during a posterior approach cut the dislocation risk dramatically, to about a quarter of the rate seen without repair.⁹

When dislocation does happen, it typically presents as sudden, severe pain with an inability to move or bear weight on the leg. The leg often looks visibly shorter or rotated. About two-thirds of dislocations can be treated with a closed reduction, where a doctor manipulates the joint back into place under sedation without cutting anything open. The remaining third require surgical intervention, which may involve changing the liner, adding a constrained component, or in recurrent cases, converting to a dual-mobility implant.¹⁰ Dual-mobility cups, which have a smaller ball nested inside a larger one, have been explored specifically for patients at high fall risk, though the evidence for their advantage over standard cups has not reached statistical significance in all studies.¹¹

How Bone Quality Changes the Equation

The strength of the bone surrounding the implant is one of the biggest determinants of what happens when you fall. Osteoporosis, the thinning and weakening of bone that becomes increasingly common with age, dramatically raises the stakes. The study that found 94% of periprosthetic fractures resulted from standing-height falls also reported that these fractures, by definition, qualified as osteoporosis-defining events because a healthy bone should withstand that level of force.³

A large registry study from Scandinavia found that medically treated osteoporosis roughly tripled the risk of early periprosthetic fracture, with female sex and older age adding further risk.¹² This means that bone health management after hip replacement is not just general wellness advice; it’s a direct protective factor against the most serious consequence of a fall. If you have a hip replacement and haven’t had a bone density scan, or if you’ve been diagnosed with osteoporosis but aren’t being treated, that’s a conversation worth having with your doctor sooner rather than later.

Does the Type of Implant Matter

Yes, and the evidence on this point is reasonably consistent. Hip replacement stems are either cemented into the bone with a polymer grout or pressed in without cement, relying on the bone to grow into a textured surface over time. The same Scandinavian registry study found that uncemented stems were associated with about a fourfold increase in the risk of early periprosthetic fracture compared to cemented stems.¹² A large randomized trial of hemiarthroplasty (a related but slightly different procedure often done for hip fractures in older adults) found that periprosthetic fractures occurred in about 2% of the uncemented group versus 0.5% in the cemented group.¹³

A recent systematic review and meta-analysis of cemented versus uncemented fixation specifically in total hip replacement found a trend in the same direction, with cemented stems showing a lower fracture risk, though the pooled result did not reach statistical significance.¹⁴ The practical takeaway is that uncemented stems, while they have other advantages in younger and more active patients, appear to leave the bone slightly more vulnerable to fracture around the implant, especially in older people with weaker bone. This doesn’t mean uncemented stems are bad; it means the choice of implant should factor in the patient’s bone quality and fall risk.

Mortality After a Periprosthetic Fracture

This is the hardest part of the story, but it’s important to be honest about it. A periprosthetic fracture is a serious injury, especially in older adults. A systematic review pooling data across many studies found that one-year mortality after a periprosthetic femoral fracture was about 13%, with about 3% of patients dying within 30 days and roughly 5% within 90 days.¹⁵ Another study put the one-year figure slightly higher at about 18%, with 80% of those deaths occurring within the first three months. The only factor that independently predicted one-year mortality in multivariate analysis was age.¹⁶

Swedish registry data added more nuance, showing that the excess mortality attributable to the fracture itself (as opposed to the general frailty of the patient population) was relatively modest: roughly 2-4% depending on age and sex, with men and older patients faring worse.¹⁷ The high raw mortality numbers reflect the fact that people who break bones around hip implants tend to be elderly, frail, and living with multiple health conditions. The fracture is often the event that tips a fragile person into a cascade of complications like pneumonia, blood clots, or deconditioning, rather than the fracture itself being directly lethal.

If You’ve Already Fallen Before Surgery, That Matters Too

An interesting finding that gets overlooked: people who have a history of falling before their hip replacement are at substantially higher risk of trouble afterward. A propensity-matched analysis found that patients with a preoperative fall experienced higher rates of virtually every post-surgical complication at one year. Periprosthetic fracture risk was about double, dislocation risk was more than double, and the revision rate was nearly twice as high compared to patients who hadn’t fallen before surgery. Postoperative falls were also far more common in the preoperative-fall group, with about 10% falling again within a year versus 4% of those without a prior fall history.¹⁸ The lesson here is that falling is often a recurring pattern, not a one-off event. If you were falling before surgery, the surgery alone won’t fix the underlying balance and strength problems that put you on the ground.

The Fear of Falling and Its Consequences

There’s a psychological dimension to this topic that gets too little attention. Even when a fall doesn’t cause structural damage, it can create a fear of falling that becomes its own problem. About 42% of patients reported severe fear of falling during their very first mobilization after surgery.¹⁹ That fear doesn’t vanish quickly. A longitudinal study found that even at twelve months post-surgery, over 20% of patients still felt afraid during everyday activities like using stairs, getting up from the floor, and walking around the neighborhood. Roughly 10% were actually restricting their daily activities because of that fear.²⁰

A cross-sectional study of Japanese women after hip replacement found that 45% experienced fear of falling on stairs, and about a quarter felt anxious during activities like bathing, bending down, or getting up from the floor. That fear was correlated with a history of falling and with lower walking capacity.²¹ The problem with fear of falling is that it creates a vicious cycle: you move less because you’re afraid, your muscles weaken and balance deteriorates because you’re moving less, and then you’re actually more likely to fall. Breaking that cycle is one of the most important things rehabilitation can do.

Exercise and Rehabilitation as Protection

Structured exercise after hip replacement improves both balance and walking ability, which directly reduces fall risk. A systematic review and meta-analysis of exercise therapy after total hip replacement found meaningful improvements in both balance and gait among patients who participated in exercise programs compared to those who received standard care alone.²² A randomized trial comparing home-based and center-based strengthening programs found that both were effective, with no meaningful difference in outcomes between the two settings. That’s encouraging because it means you don’t necessarily need a gym or a physiotherapy clinic to do the work; a structured home program can deliver the same results.²³

The key word in both studies is “targeted.” Generic advice to “stay active” is not the same as a structured strengthening program focused on the hip abductors, quadriceps, and core stabilizers that keep you upright. If your post-surgical rehab consisted of a handout of exercises and a pat on the back, and you’re still feeling unsteady at the three- or six-month mark, it’s worth asking for a referral to a physiotherapist who can design something more specific.

The Financial Weight of a Periprosthetic Fracture

The costs associated with these injuries are substantial and often catch patients and families off guard. An analysis of revision surgery for fracture found that hospitalization costs were 33% to 48% higher than for other types of revision hip surgery, and that increased resource use continued beyond discharge, with higher rates of 30-day complications adding to the bill.²⁴ The hospital stays tend to be long, and many patients need time in a rehabilitation facility before they can go home. For people living alone or with a single caregiver, a periprosthetic fracture can force a sudden transition from independent living to needing significant help, at least temporarily and sometimes permanently.

What to Do Right After a Fall

If you fall and you can get up without severe pain, that’s a good sign, but it’s not an all-clear. Pain that develops over the next few hours, especially pain that makes it hard to bear weight or that worsens with movement, warrants an X-ray. A periprosthetic fracture doesn’t always announce itself with the dramatic snap people imagine. Some cracks around implants produce a deep ache and a subtle limp rather than an obvious inability to walk. If you notice new-onset groin pain, thigh pain, or a clicking or clunking sensation in the hip after a fall, get imaging. Dislocation is harder to miss because the pain is usually immediate and intense, and the leg typically sits at an odd angle.

If you can’t get up after the fall, or if the leg looks shortened or rotated, call for emergency help. Don’t try to force the leg into a normal position. Keep still and wait for trained responders. Time matters less than with some other injuries, but getting evaluated sooner rather than later gives surgeons more options and generally leads to better outcomes.

Wearable Technology for Monitoring Recovery

An emerging area of interest is using commercial activity trackers to monitor recovery after hip replacement. A systematic review found that wearable devices are feasible tools for tracking physical activity levels during recovery and could help detect changes in movement patterns that might signal declining function or increased fall risk.²⁵ The review also noted that wearables could serve as motivational tools, encouraging patients to gradually increase their daily step counts and overall activity. While this technology hasn’t yet become standard clinical practice, it offers a way for patients and their care teams to get objective data on how recovery is actually progressing day by day, rather than relying on how someone feels during a brief clinic visit every few weeks. For patients who live far from their surgeon or who prefer to track things numerically, a simple step counter or activity tracker on the wrist is a low-cost, low-risk addition to a rehabilitation program.