Dr. Jiwu Chen

Dr. Jiwu Chen
Injuries & conditions

Mallet finger

Mallet finger

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In plain language

Disruption of the terminal extensor attachment, sometimes with a bone fragment, causing loss of active distal interphalangeal extension.

01

Clinical Significance & Management

Most closed, aligned injuries use continuous extension splinting, often 6–8 weeks or longer before supervised weaning. Subluxation, displaced fragments, open injury or failed splinting may require surgery.

02

Symptoms & Clinical Presentation

1

Drooping fingertip that cannot actively straighten

2

Dorsal pain, swelling or bruising

03

Etiology & Injury Mechanisms

  • Forced flexion of an extended fingertip
  • Minor sudden loading or a laceration
04

Diagnostics & Imaging Guide

Assess active/passive extension and skin

Radiographs evaluate fragment, displacement and joint alignment

05

Treatment Options

Option 1

Keep the distal joint extended while other joints move

Option 2

Support the tip during cleaning; avoid pressure injury or excessive extension

06

Rehabilitation Milestones & Timeline

Rehabilitation depends on the diagnosis, procedure and associated injuries. Progression requires assessment of healing, symptoms and function; elapsed time or a single test cannot determine readiness for sport.

Splint

Maintain prescribed position and inspect skin

Motion

Gentle movement after stability review; night protection if directed

Sport

Plan protection according to healing, function and impact risk

Red Flags & Urgent Warnings

Seek immediate emergency or specialist orthopaedic evaluation if any of the following occur:

Open or nail-bed injury, pallor or coldness needs timely care

Increasing droop, pressure sores or proximal hyperextension needs review

07

Evidence-Based Clarifications

Consistency and fit matter; accidental bending may disrupt healing. Mild residual lag need not impair function.

Sources & References

Educational clinical definitions synthesized from AAOS, Cleveland Clinic, Mayo Clinic, and HSS. Individual diagnosis and surgery require professional medical evaluation.

Publication date

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