# Colles Fracture

Manage Colles fracture by identifying open, neurovascular, and unstable injuries; obtaining post-reduction alignment; then matching cast treatment or fixation to displacement, articular involvement, instability, functional demand, and the likelihood that loss of reduction would change management.

**Clinical question:** How should clinicians reduce, risk-stratify, monitor, and select fixation for an adult Colles fracture?

Updated: 2026-08-24T17:42:43.673668+00:00

## What matters in practice
- Treat open fracture or neurovascular deficit as an urgent operative-pathway injury; document and reassess median nerve and distal perfusion before and after reduction or splinting. [20]
- For non-geriatric patients, post-reduction radial shortening greater than 3 mm, dorsal tilt greater than 10 degrees, or intra-articular step-off greater than 2 mm supports operative fixation. [18]
- In patients 65 years or older, surgery improves radiographic alignment but has not shown superior long-term patient-reported outcomes versus nonoperative treatment; functional demand and ability to tolerate deformity should drive shared decisions. [18][4]
- Repeat wrist radiographs at 1 to 2 weeks only when fracture instability is present and displacement would alter management; stable fractures do not require routine interval imaging. [20]
- When fixation is selected, target surgery within 72 hours for intra-articular fractures and within 1 week for extra-articular fractures. [20]

## Identify injuries that cannot wait for routine casting

Prioritize limb status and fracture complexity before choosing definitive stabilization.

A Colles fracture is a distal radius fracture with dorsal displacement and angulation of the distal fragment, usually after a fall on an outstretched hand. Obtain wrist radiographs and assess whether the injury is extra-articular or extends into the radiocarpal or distal radioulnar joint; involvement of the sigmoid notch can alter distal radioulnar joint biomechanics and may lead to pain, instability, or restricted forearm rotation if healed with a step or gap. [22][9]

Before and after any manipulation, record digital perfusion and a focused neurologic examination, particularly median nerve function. Open fracture, neurovascular deficit, marked displacement, and unstable fracture morphology are indications to move beyond routine outpatient cast management and consider operative stabilization. [20]

Place an acutely displaced fracture on a reduction pathway when restoring alignment is feasible and subsequent treatment depends on post-reduction radiographs. Splint after reduction rather than applying a circumferential acute cast when swelling risk is material; excessive pain, finger paresthesias, or digit discoloration in immobilization requires immediate reassessment for a constrictive splint or cast. [22]
- Obtain and document post-reduction radiographs before disposition when reduction is performed; treatment selection depends on residual shortening, tilt, and articular incongruity. [18][20]
- Escalate urgently for open injury, vascular compromise, or neurologic deficit rather than relying on serial outpatient radiographs. [20]
- Assess distal radioulnar joint symptoms and forearm rotation when the fracture line involves the sigmoid notch. [9]

*Initial triage features that change the immediate management pathway. [20][9]*

| Finding | Interpretation | Next action |
| --- | --- | --- |
| Open fracture or neurovascular deficit | Not a routine closed-cast injury. [20] | Urgent operative-pathway evaluation; document serial vascular and neurologic findings. [20] |
| Intra-articular extension or sigmoid-notch involvement | Articular incongruity or distal radioulnar joint injury may affect function and stability. [9][20] | Assess reduction quality and consider early operative planning if reconstruction is indicated. [20] |
| Severe displacement or unstable pattern | Higher concern for inadequate maintenance of reduction. [20] | Reduce, splint, obtain post-reduction films, and determine whether loss of alignment would warrant fixation. [20] |
| Stable, minimally displaced extra-articular fracture | Often appropriate for nonoperative immobilization. [21][23] | Immobilize and mobilize early after immobilization is discontinued. [20] |

## Use post-reduction alignment and patient demand to select casting or fixation

Age is a proxy for demand, not a substitute for individualized functional goals.

For non-geriatric adults, the AAOS/ASSH guideline supports operative treatment when post-reduction radial shortening exceeds 3 mm, dorsal tilt exceeds 10 degrees, or intra-articular displacement or step-off exceeds 2 mm. These thresholds are decision aids after reduction, not an indication to operate on every radiographic deformity without considering injury pattern and patient goals. [18]

For patients 65 years and older, operative fixation does not improve long-term patient-reported outcomes compared with nonoperative treatment, despite better radiographic results. Casting has the least complications and comparable functional outcomes in elderly trial populations, whereas radiographic alignment after closed reduction and the patient's functional demand should determine whether operative stabilization is worthwhile. [18][4]

In an adult with a closed extra-articular Colles fracture, closed reduction and casting are generally reasonable when residual deformity is limited. One clinical reference uses no more than 5 mm shortening, 5-degree change in radial inclination, 2 mm articular step-off, and 5 degrees angulation as eligibility parameters for closed reduction as primary treatment; use this alongside the AAOS/ASSH thresholds and the patient's age and functional requirements. [23][18]
- Favor fixation in a younger or high-demand patient when residual shortening, dorsal tilt, or articular incongruity exceeds AAOS/ASSH thresholds after reduction. [18]
- In an older low-demand patient, discuss that improved x-ray alignment with surgery may not translate to superior long-term reported function and exposes the patient to surgical complications. [18][4][14]
- Do not use chronologic age alone when an older patient has high hand-function requirements or when a satisfactory reduction cannot be maintained. [4][18]

### What instability means operationally

No single instability factor reliably predicts redisplacement. Use a practical question instead: if interval films show loss of reduction, would the patient accept continued cast treatment or proceed to fixation? Obtain early repeat radiographs only when the answer is that further displacement would change management. [11][20]
- A fracture initially judged unstable merits a 1- to 2-week radiograph if redisplacement would trigger surgery. [20]
- For stable fractures, routine radiographs before cast removal are not required unless clinical concern arises. [20]

*Post-reduction treatment selection for adult Colles fracture. [18][4][20][23]*

| Clinical branch | Key discriminator | Preferred pathway |
| --- | --- | --- |
| Non-geriatric adult | Radial shortening >3 mm, dorsal tilt >10 degrees, or intra-articular step-off >2 mm after reduction. [18] | Discuss operative fixation. [18] |
| Geriatric adult with acceptable function goals | Radiographic deformity alone; long-term patient-reported outcomes are not superior with surgery. [18] | Closed reduction when indicated, then immobilization and functional follow-up. [18][4] |
| Older but high-demand patient | Functional demand and quality of reduction are central to decision-making. [4] | Individualize fixation versus casting after counseling on earlier recovery potential and surgical risk. [11][14] |
| Stable or minimally displaced extra-articular fracture | No need for reduction or acceptable post-reduction alignment. [13][21][23] | Immobilize nonoperatively; avoid unnecessary surveillance imaging. [20] |
| Unstable fracture in which redisplacement would change treatment | Anticipated loss of reduction has actionable consequences. [20] | Repeat radiograph at 1 to 2 weeks and proceed according to alignment and patient goals. [20] |

## Structure immobilization and radiographic follow-up around the risk of actionable displacement

Immobilization should protect reduction without prolonging stiffness-producing treatment.

Closed reduction and plaster immobilization remain the primary noninvasive approach for extra-articular distal radius fractures. Immobilization commonly lasts 3 to 6 weeks, but non- or minimally displaced fractures that did not require reduction may safely undergo only 1 week of plaster immobilization in selected patients; shorter immobilization may improve function and return to daily activities. [13][21]

For a stable fracture, consider cast removal at 4 weeks to permit early mobilization. Do not obtain an x-ray solely at cast removal unless symptoms or examination create concern; routine repeat imaging is reserved for unstable patterns in which a changed position would lead to surgical intervention. [20]

At each cast or splint assessment, ask specifically about escalating pain, numbness or tingling, and finger color change. These findings require immediate examination of the immobilization and neurovascular status rather than reassurance or delayed routine follow-up. [22]
- Use a 1- to 2-week x-ray after injury or manipulation only for an unstable pattern when redisplacement would change the plan. [20]
- Consider 4-week cast removal for stable fractures to enable early mobilization. [20]
- For non- or minimally displaced fractures without reduction, a short immobilization course may be appropriate in selected patients. [13]

*Imaging and immobilization decisions after nonoperative treatment. [13][20]*

| Situation | Imaging plan | Immobilization decision |
| --- | --- | --- |
| Unstable fracture; further displacement would prompt surgery | Repeat wrist radiograph 1 to 2 weeks after injury or manipulation. [20] | Continue immobilization while reassessing alignment and surgical preference. [20] |
| Stable fracture | No routine follow-up x-ray required; no x-ray at cast removal unless clinically indicated. [20] | Consider cast removal at 4 weeks for early mobilization. [20] |
| Non- or minimally displaced fracture not requiring reduction | Routine imaging strategy should be guided by clinical concern. [13][20] | Selected patients may have 1 week of plaster immobilization. [13] |

## Choose fixation for reduction goals, fracture morphology, and recovery priorities

Fixation improves stability and may accelerate recovery, but long-term functional advantages are not uniform.

When operative stabilization is selected, perform surgery within 72 hours for intra-articular distal radius fractures and within 1 week for extra-articular fractures. More displaced and unstable fractures generally warrant open reduction and internal fixation, while simpler patterns may be treated with percutaneous K-wires; external fixation is an additional option in selected patterns. [20]

Volar locking plate fixation provides stable fixed-angle support, direct reduction, and permits early active wrist rehabilitation. It is particularly useful for comminuted fractures, osteopenic bone, and high-energy injuries, but its principal patient-centered advantage is earlier functional recovery in unstable or high-demand cohorts; longer-term outcomes may converge with nonoperative care. [15][11]

Counsel specifically about plate-related complications before choosing volar fixation. Reported complications include flexor and extensor tendon injury, flexor pollicis longus rupture, carpal tunnel syndrome, complex regional pain syndrome, loss of reduction, and hardware failure. New pain, tendon dysfunction, median neuropathy, or concern for mechanical failure after fixation should trigger focused examination and radiographic assessment. [14]
- Use percutaneous pinning for simpler fracture patterns when percutaneous reduction and stabilization are adequate. [20]
- Use volar locking plate fixation when direct reduction and stable fixation are needed for a displaced, unstable, comminuted, or osteopenic fracture. [15][20]
- Do not frame surgery as automatically superior in older adults; weigh earlier recovery against operative complications and similar long-term reported outcomes. [18][11][14]

*Definitive stabilization options and principal selection tradeoffs. [15][20][14]*

| Option | Most useful setting | Principal tradeoff |
| --- | --- | --- |
| Closed reduction and cast immobilization | Stable or acceptably reduced fractures; often favored in geriatric patients with lower functional demand. [4][18][21] | Least complications but may produce worse radiographic alignment than surgery. [4] |
| Percutaneous K-wire fixation | Simpler fracture patterns suitable for percutaneous stabilization. [20] | Less suitable when fracture complexity requires direct reduction or more robust fixation. [20] |
| Volar locking plate fixation | Displaced, unstable, comminuted, osteopenic, or high-demand injuries requiring stable fixation and early rehabilitation. [15][20] | Risk of tendon injury or rupture, median neuropathy, complex regional pain syndrome, loss of reduction, and hardware failure. [14] |
| External fixation | An operative option for selected distal radius fracture patterns. [20] | Requires selection based on morphology and treatment goals; no uniform long-term functional superiority is established across techniques. [20][21] |

## Monitor the complication that would change treatment

Follow-up should detect loss of reduction, neurovascular compromise, and treatment-specific dysfunction.

For nonoperative care, the highest-yield surveillance question is whether a fracture likely to redisplace remains acceptably aligned when a change would lead to fixation. Schedule the 1- to 2-week radiograph only in that circumstance; stable fractures can proceed toward early mobilization after cast removal without routine imaging. [20]

After volar plating, evaluate new volar wrist pain, thumb-flexion weakness or loss, extensor dysfunction, paresthesias, disproportionate pain, and mechanical symptoms as possible tendon injury, flexor pollicis longus rupture, carpal tunnel syndrome, complex regional pain syndrome, or hardware failure. These complications are recognized risks of plate fixation and should prompt targeted surgical reassessment rather than routine observation. [14]

Functional recovery should be assessed against the patient's hand-use requirements rather than radiographs alone. In older adults, a less anatomic radiographic result after casting may still yield function comparable to surgery, while a high-demand patient may reasonably value the earlier recovery permitted by stable operative fixation. [4][11][15]
- Reassess alignment early only if a loss of reduction would alter the definitive plan. [20]
- Escalate after plating for suspected tendon dysfunction, median neuropathy, complex regional pain syndrome, loss of reduction, or hardware failure. [14]
- Use patient-specific functional demand as the final arbiter when radiographic and patient-reported outcomes diverge. [4][18]

*Follow-up findings that require a change in management. [20][14][22]*

| Finding | Likely concern | Action |
| --- | --- | --- |
| Interval displacement on x-ray in an unstable fracture | Failure to maintain a reduction that was necessary for the patient's goals. [20] | Reassess operative versus continued nonoperative treatment. [20] |
| Severe pain, paresthesias, or digit discoloration in cast or splint | Constrictive immobilization or evolving neurovascular compromise. [22] | Immediate examination and correction of immobilization with repeat neurovascular assessment. [22] |
| Thumb-flexion loss, tendon pain, extensor dysfunction, or median neuropathy after volar plate | Tendon injury or rupture, carpal tunnel syndrome, or hardware-related complication. [14] | Prompt focused assessment and surgical review. [14] |
| Disproportionate persistent pain after fixation | Complex regional pain syndrome is a recognized plate-fixation complication. [14] | Evaluate promptly and direct management to the identified complication. [14] |

## References
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## Editorial note

Prepared from cited clinical literature using Astra's research workflow. Verify recommendations against current guidance and patient-specific factors.