Unlock Optimal Healing: The Importance of Postoperative Care

Unlock Optimal Healing: Open Reduction and Internal Fixation of Distal Radius Fractures

Introduction & Epidemiology

Distal radius fractures (DRFs) are among the most prevalent fractures encountered by orthopedic surgeons, representing approximately one-sixth of all fractures treated in emergency departments. Their epidemiology demonstrates a bimodal distribution: high-energy trauma typically causes DRFs in younger, active individuals, while low-energy falls on an outstretched hand (FOOSH) are characteristic of osteoporotic fragility fractures in the elderly, particularly postmenopausal women. The increasing life expectancy of the global population is projected to further elevate the incidence of DRFs.

Classification systems for DRFs are numerous, reflecting the complexity and variability of these injuries. Commonly utilized systems include:
* Frykman classification: Primarily based on intra-articular involvement and associated ulnar styloid fractures.
* AO/OTA classification: A comprehensive alphanumeric system categorizing fractures by location, articular involvement, and comminution. This system provides a standardized, albeit complex, language for describing DRFs.
* Fernandez classification: Focuses on the mechanism of injury, aiding in understanding fracture stability and predicting outcomes.
* Universal classification: Incorporates elements of articular involvement, metaphyseal comminution, and associated carpal injuries.

Historically, most DRFs were managed non-operatively with closed reduction and cast immobilization. However, the advent of sophisticated internal fixation devices, particularly volar locking plates, has led to a paradigm shift, favoring surgical management for unstable and displaced fractures to optimize anatomical restoration and facilitate earlier rehabilitation. This document will focus on the principles and techniques of open reduction and internal fixation (ORIF) for DRFs, primarily via the volar approach.

Surgical Anatomy & Biomechanics

A thorough understanding of the intricate anatomy and biomechanics of the distal forearm and wrist is paramount for successful DRF management.

Surgical Anatomy

• Distal Radius: The distal radius is a triangular bone that widens distally to articulate with the carpus and ulna.
  • Articular Surfaces: The distal articular surface is biconcave, comprising the scaphoid fossa radially and the lunate fossa ulnarly. These articulate with the scaphoid and lunate bones, respectively.
  • Metaphysis: The metaphyseal flare accommodates cancellous bone, critical for screw purchase in fixation.
  • Radial Styloid: The most radial projection, serving as an attachment for the brachioradialis and radial collateral ligament.
  • Lister's Tubercle (Dorsal Tubercle): A palpable bony prominence on the dorsal aspect, acting as a pulley for the extensor pollicis longus (EPL) tendon. It is a key landmark for surgical approaches and plate positioning.
  • Pronator Quadratus Fossa: A shallow depression on the volar aspect, bordered distally by the "watershed line" or "critical line" (anastomosis of radial and anterior interosseous arteries), which delineates the vascular supply to the pronator quadratus and the distal radius. Elevation of the pronator quadratus proximal to this line is crucial to preserve periosteal blood supply.
• Distal Ulna: Articulates with the distal radius at the distal radioulnar joint (DRUJ).
  • Ulnar Head: Articulates with the sigmoid notch of the radius.
  • Ulnar Styloid: A conical projection that serves as an attachment point for the ulnar collateral ligament and the triangular fibrocartilage complex (TFCC).
• Carpal Bones: The proximal carpal row (scaphoid, lunate, triquetrum) forms a functional unit that articulates with the radius. Maintaining proper carpal alignment, particularly with respect to the lunate, is critical for wrist function.
• Ligaments: Provide static stability to the wrist.
  • Radiocarpal Ligaments:
    • Volar (stronger): Radioscaphocapitate, long and short radiolunate. These are crucial stabilizers against dorsal translation of the carpus and provide attachment points for fracture fragments.
    • Dorsal (weaker): Dorsal radiocarpal ligament.
  • Intercarpal Ligaments: Connect individual carpal bones.
  • Triangular Fibrocartilage Complex (TFCC): Composed of the articular disc, meniscal homologue, and various radioulnar and ulnocarpal ligaments. It stabilizes the DRUJ and acts as a cushion between the ulna and carpus.
• Neurovascular Structures:
  • Radial Artery: Runs distally radial to the flexor carpi radialis (FCR) tendon. Vulnerable during the volar approach.
  • Ulnar Artery: Runs volar and ulnar to the distal ulna.
  • Median Nerve: Lies deep to the FCR tendon, directly in the carpal tunnel. Highly susceptible to compression from fracture displacement or post-operative edema.
  • Ulnar Nerve: Located ulnar to the ulnar artery, less commonly injured in DRFs.
  • Superficial Radial Nerve: Sensory nerve, courses dorsally and radially, prone to iatrogenic injury with dorsal approaches or external fixation.
  • Dorsal Sensory Ulnar Nerve: Provides sensation to the dorsal ulnar hand, vulnerable during dorsal approaches.
• Tendons:
  • Extensor Compartments (I-VI): Pass dorsally under the extensor retinaculum. The extensor pollicis longus (EPL) passes through the third compartment, crossing Lister's tubercle.
  • Flexor Tendons: Pass volarly through the carpal tunnel (FPL, FDS, FDP) and Guyon's canal (FCU). The flexor pollicis longus (FPL) is particularly vulnerable to irritation or rupture if volar screws protrude or if the plate is positioned too distally on the watershed line.

Biomechanics

• Normal Wrist Kinematics: The wrist permits complex movements, including flexion/extension, radial/ulnar deviation, and forearm pronation/supination.
• Load Bearing: Approximately 80% of axial load across the wrist is transmitted through the radiocarpal articulation, with the remaining 20% passing through the TFCC and ulnar head.
• Fracture Patterns and Forces: FOOSH injuries typically result in dorsal displacement and angulation (Colles fracture), while high-energy trauma can produce highly comminuted patterns (Pilon fracture of the radius) or volar displacement (Smith fracture).
• Radiographic Parameters of Stability: Restoration of specific radiographic parameters is crucial for optimal wrist function and reducing the risk of post-traumatic arthritis:
  • Radial Inclination: Normal 22-23 degrees, measured on a PA view.
  • Radial Height: Normal 11-12 mm, measured on a PA view.
  • Volar Tilt: Normal 11-12 degrees, measured on a lateral view (neutral is 0 degrees, dorsal angulation is negative).
  • Ulnar Variance: Normal 0 to -2 mm, measured on a PA view (the relationship between the distal articular surfaces of the radius and ulna). Positive ulnar variance indicates a relatively long ulna.
  • Articular Congruity: Maintenance of a smooth articular surface without significant step-off (<1-2 mm).

Loss of these parameters indicates instability and a higher propensity for complications such as malunion, DRUJ dysfunction, and post-traumatic arthritis.

Indications & Contraindications

The decision for operative versus non-operative management of DRFs hinges on fracture stability, patient factors, and the ability to achieve and maintain an acceptable reduction.

Indications for Operative Management (ORIF)

Operative fixation is generally indicated for unstable, irreducible, or significantly displaced DRFs that do not meet criteria for acceptable reduction or are unlikely to maintain reduction with non-operative treatment.

• Inability to achieve or maintain acceptable reduction following closed manipulation:
  • Persistent dorsal angulation > 20 degrees or loss of normal volar tilt (>0 degrees in some literature, >10 degrees loss relative to contralateral wrist).
  • Radial shortening (loss of radial height) > 3-5 mm compared to the contralateral wrist.
  • Intra-articular step-off or gap > 1-2 mm.
  • Loss of radial inclination > 5 degrees compared to contralateral side.
• Open fractures: Require urgent debridement and stabilization.
• Irreducible fractures: Due to soft tissue interposition (e.g., pronator quadratus, median nerve, tendons) or severe comminution.
• Associated injuries: Such as carpal instability (e.g., perilunate dislocation), median nerve entrapment due to acute displacement, or ipsilateral elbow injuries.
• Significant comminution: Especially of the volar or dorsal cortex, suggesting inherent instability.
• Young, active patients: Who demand a high functional outcome and early return to activity, making anatomical reduction paramount.
• Patients with multiple injuries (polytrauma): Early stable fixation (damage control orthopedics) can facilitate overall patient care.

Contraindications for Operative Management

While relative, these factors warrant careful consideration and discussion with the patient.

• Absolute Contraindications:
  • Active local or systemic infection that cannot be controlled.
  • Severe soft tissue compromise (e.g., compartment syndrome, extensive open wounds with contamination) that precludes safe immediate internal fixation. In such cases, temporary external fixation may be considered, followed by delayed ORIF.
• Relative Contraindications:
  • Patients with significant medical comorbidities (ASA III/IV) who are deemed medically unfit for general or regional anesthesia and surgical intervention.
  • Non-displaced, stable fractures with acceptable radiographic parameters that are amenable to closed reduction and casting.
  • Patients with extremely poor bone quality (severe osteoporosis) where adequate screw purchase is unlikely, though locking plates have mitigated this to some extent.
  • Lack of patient compliance with post-operative rehabilitation protocols.
  • Extreme age or limited functional demands where the risks of surgery outweigh the potential benefits.

Table: Operative vs. Non-Operative Indications for Distal Radius Fractures

Pre-Operative Planning & Patient Positioning

Meticulous pre-operative planning is essential for anticipating potential challenges, selecting appropriate implants, and ensuring efficient surgical execution.

Pre-Operative Planning

• Imaging Review:
  • Standard Radiographs: PA, lateral, and oblique views of the injured wrist are fundamental. Evaluation includes dorsal/volar angulation, radial inclination, radial height, ulnar variance, and assessment of articular congruity.
  • Contralateral Wrist Radiographs: Often obtained for comparison, especially regarding radial height, inclination, and volar tilt, as individual anatomical variations exist.
  • Computed Tomography (CT) Scan: Indispensable for intra-articular fractures. A CT scan with fine cuts provides detailed information on articular step-offs, gaps, comminution patterns, and orientation of fracture fragments (e.g., die-punch fragments, sagittal split patterns). This aids in precise surgical planning and reduction strategies.
• Fracture Classification & Morphology: Utilize a standardized classification system (e.g., AO/OTA) to describe the fracture accurately. Analyze the location of fracture lines, extent of comminution, and displacement.
• Implant Selection:
  • Volar Locking Plate: The most common implant. Consider plate design (anatomic contouring, distal screw trajectory), length, and number of screw holes. Plates are typically titanium, pre-contoured, and designed to capture distal articular fragments with fixed-angle locking screws.
  • Screw Types: Locking screws (fixed-angle stability) are preferred for osteoporotic bone or comminuted fractures. Cortical or cancellous screws may be used for compression or non-locking fixation where appropriate.
  • Ancillary Fixation: K-wires for temporary fixation, joy-sticking, or supplementary percutaneous pinning.
• Surgical Approach Planning: Determine the most appropriate surgical approach based on fracture morphology (e.g., volar approach for most DRFs, dorsal for specific dorsal comminution or revision).
• Patient Education (Surgeon-to-Patient Discussion): While the prompt dictates doctor-to-doctor communication, it's important to acknowledge that the surgeon would discuss the risks, benefits, alternatives, and expected recovery with the patient.

Patient Positioning

• Operating Table: Supine position.
• Arm Preparation: The affected arm is placed on a radiolucent hand table, ensuring ample space for instrument manipulation and fluoroscopy access.
• Tourniquet: A pneumatic tourniquet is applied to the upper arm (typically 250-300 mmHg, or 100 mmHg above systolic blood pressure) to create a bloodless field, which is critical for clear visualization of anatomical structures and fracture fragments.
• Traction: A finger trap traction tower (e.g., using 5-10 lbs of traction) is frequently employed for initial closed reduction and ligamentotaxis. This provides indirect reduction of certain fragment types, allows for initial fluoroscopic assessment, and frees the surgeon's hands for other tasks.
• C-arm Access: The fluoroscopy unit (C-arm) must have unobstructed access to the wrist in both PA and lateral projections. Oblique views may also be necessary. The C-arm monitor should be positioned within the surgeon's direct line of sight.
• Sterile Prep and Drape: Standard sterile preparation and draping of the entire upper extremity, from shoulder to fingertips, allowing for full range of motion of the wrist and elbow during the procedure if needed.

Detailed Surgical Approach / Technique

The volar approach (Henry's approach) is the most common technique for ORIF of distal radius fractures due to the prevalence of volar locking plates and the stability provided by volar plating.

Volar Approach (Henry's Approach)

This approach is centered on the internervous plane between the radial artery (supplied by the median nerve) and the flexor carpi radialis (FCR) muscle (supplied by the median nerve, but the approach itself allows careful retraction of the FCR and protection of the radial artery). However, historically described as between the FCR (median nerve) and the brachioradialis (radial nerve), the critical dissection involves identifying and protecting the median nerve and radial artery during exposure of the pronator quadratus.

1. Incision: A longitudinal skin incision, typically 6-8 cm in length, is made on the volar aspect of the distal forearm. It begins just distal to the flexor crease of the wrist (allowing for carpal tunnel release if necessary) and extends proximally, usually along the ulnar border of the flexor carpi radialis (FCR) tendon. Some prefer a slightly more radial incision.
2. Superficial Dissection:
   • Skin and subcutaneous tissue are incised. Careful attention is paid to avoid injury to the palmar cutaneous branch of the median nerve (courses radially).
   • The antebrachial fascia is identified.
   • The FCR tendon sheath is opened longitudinally, typically along its ulnar border. The FCR tendon is then retracted radially.
3. Deep Dissection & Neurovascular Protection:
   • Radial Artery: The radial artery is usually found immediately radial to the FCR tendon. It must be carefully identified, mobilized, and protected, typically retracted radially.
   • Median Nerve: The median nerve lies deep and ulnar to the FCR tendon, within the carpal canal. It is often visualized as the deepest structure in the approach. It must be protected throughout the procedure. If concomitant carpal tunnel syndrome is present or anticipated, a formal carpal tunnel release can be performed at this stage.
   • Pronator Quadratus (PQ) Muscle: After identifying and protecting the median nerve and radial artery, the deep surface of the FCR tendon is retracted, revealing the pronator quadratus muscle directly overlying the volar aspect of the distal radius. This quadrilateral muscle arises from the distal ulna and inserts onto the distal radius.
4. Exposure of Fracture Site:
   • The pronator quadratus muscle is carefully elevated subperiosteally from its insertion on the distal radius. This elevation typically begins from the radial side and proceeds ulnarly.
   • It is crucial to stay proximal to the "watershed line" or "critical line" (anastomosis of the radial artery and anterior interosseous artery branches), which is approximately 5-7 mm proximal to the distal articular margin. Disruption of the periosteal attachments distal to this line can compromise vascularity to articular fragments.
   • The exposed distal radius, including the fracture fragments, is then visible.
5. Fracture Reduction:
   • Initial Reduction: Often achieved using a traction tower and finger traps (ligamentotaxis) to distract the fracture and restore initial length.
   • Direct Visualization & Manipulation: With the fracture exposed, remaining displacement is reduced under direct vision.
     • Joy-sticking with K-wires or small bone clamps can be used to manipulate large fragments.
     • Periosteal elevators or blunt instruments can help reduce articular fragments.
     • Manual pressure and traction can correct dorsal angulation and radial shortening.
     • Impacted fragments can be disimpacted and elevated. Bone graft or substitute may be used to fill metaphyseal defects, especially in osteoporotic patients, to prevent collapse.
   • Fluoroscopic Confirmation: Repeated intraoperative fluoroscopy (PA and lateral views) is essential to confirm anatomical reduction:
     • Restoration of volar tilt (typically 8-15 degrees).
     • Restoration of radial inclination (20-25 degrees).
     • Restoration of radial height (10-13 mm).
     • Elimination of articular step-offs or gaps (>1-2 mm threshold).
     • Assessment of DRUJ congruity.
6. Plate Application and Fixation (Volar Locking Plate):
   • Plate Positioning: The chosen volar locking plate is contoured to the anatomy of the distal radius. The plate should be positioned proximal to the watershed line to minimize FPL irritation and avoid distal articular violation. The distal edge of the plate typically sits 2-3 mm proximal to the subchondral bone.
   • Initial Fixation:
     • A temporary K-wire can be used to hold the plate to the bone.
     • Often, a non-locking cortical screw is placed in an oval or eccentric hole proximally to achieve initial plate-to-bone compression and fine-tune plate position.
   • Distal Locking Screws: These are the primary stabilizers of articular fragments.
     • Multiple fixed-angle locking screws are inserted into the distal fragments, aiming for subchondral support without violating the articular surface. Various screw lengths and trajectories are available in modern plate systems.
     • Fluoroscopy (PA, lateral, and oblique views) is critical to ensure screws are not intra-articular and have adequate purchase.
   • Proximal Locking Screws: Once distal fixation is secure, proximal locking screws are inserted into the radial shaft to provide stable fixation of the plate to the main bone segment.
   • Final Assessment:
     • Check wrist range of motion through a full arc to ensure no hardware impingement and stability of fixation.
     • Re-examine fluoroscopy to confirm final reduction and hardware placement. Pay close attention to the lateral view to ensure no dorsal screw penetration and on the PA view for radial/ulnar screw trajectory.
     • Carefully assess for prominent screws that could irritate tendons.
7. Closure:
   • Pronator Quadratus Repair: The elevated pronator quadratus muscle is carefully reapproximated and repaired to its radial insertion using absorbable sutures. This helps protect the hardware from overlying tendons and may aid in tendon gliding.
   • Fascial Closure: The antebrachial fascia is closed.
   • Subcutaneous and Skin Closure: Standard layered closure.
   • Dressing: A soft, bulky dressing with a volar plaster splint in a neutral or slightly extended wrist position is typically applied to minimize swelling and provide comfort, allowing full elbow and finger motion.

Dorsal Approach (Less Common for Primary Fixation)

The dorsal approach is less frequently used for primary DRF fixation due to increased risks of extensor tendon irritation/rupture and difficulties in managing volar comminution. However, it may be indicated for highly comminuted dorsal articular fractures, specific malunions, or revision cases.
* Incision: Longitudinal incision, typically between the 3rd (EPL) and 4th (EDC, EIP) extensor compartments.
* Dissection: The extensor retinaculum is incised longitudinally between these compartments. Careful identification and protection of tendons and neurovascular structures (e.g., dorsal sensory ulnar nerve) is crucial.
* Reduction and Fixation: Principles are similar to the volar approach, but dorsal plates are used, and care must be taken to minimize plate prominence and hardware-tendon contact.

Complications & Management

Despite advancements in surgical techniques and implants, complications can arise following ORIF of distal radius fractures. Proactive recognition and appropriate management are crucial for optimal outcomes.

Table: Common Complications, Incidence, and Salvage Strategies

Management Principles

• Early Detection: Prompt identification of complications is critical. Surgeons and rehabilitation specialists must be vigilant for signs and symptoms such as increasing pain, swelling, neurovascular deficits, or signs of infection.
• Prophylaxis: Measures to prevent complications include:
  • Careful surgical technique, respecting soft tissues and neurovascular structures.
  • Appropriate hardware placement, avoiding tendon impingement or articular penetration.
  • Pre-operative antibiotics.
  • Early mobilization protocols.
  • Regional anesthesia techniques to reduce post-operative pain and CRPS risk.
• Multidisciplinary Approach: Management often requires collaboration between orthopedic surgeons, hand therapists, pain management specialists, and neurologists.

Post-Operative Rehabilitation Protocols

Post-operative rehabilitation is a cornerstone of successful distal radius fracture management, aiming to restore wrist function, strength, and range of motion while protecting the osteosynthesis. Protocols vary based on fracture stability, fixation achieved, and surgeon preference. The general philosophy for stable ORIF is early, controlled motion.

Immediate Post-Operative Phase (Day 0-7)

• Immobilization: A bulky dressing with a volar plaster splint is applied in a neutral wrist position or slight extension. This provides comfort, controls swelling, and offers initial protection, but allows for full metacarpophalangeal (MCP) and interphalangeal (IP) joint motion.
• Elevation and Ice: The hand and arm are kept elevated above heart level (e.g., on pillows) to minimize swelling. Ice packs can be applied for 20 minutes every 2-3 hours.
• Early Motion:
  • Finger Exercises: Active range of motion (AROM) exercises for all fingers (flexion and extension) begin immediately to prevent stiffness and edema.
  • Elbow and Shoulder: Full AROM exercises for the elbow and shoulder are encouraged to prevent stiffness in adjacent joints.
• Pain Management: Appropriate oral analgesics are prescribed.
• Wound Care: The dressing is typically changed by the surgeon or nurse within the first few days, and the incision site is inspected.

Early Mobilization Phase (Weeks 1-6)

• Splinting: The plaster splint is typically replaced with a removable custom-molded thermoplastic splint (often volar forearm-based wrist splint). This allows for progressive therapy while providing protection during daily activities and sleep. The splint is typically worn continuously, removed only for exercises.
• Therapy Initiation: Formal hand therapy typically begins around 1-2 weeks post-surgery, once soft tissue swelling has subsided and initial wound healing is progressing.
  • Active Range of Motion (AROM): Gentle AROM exercises for the wrist are initiated, including flexion, extension, radial and ulnar deviation, and forearm pronation/supination. These are performed within pain-free limits.
  • Passive Range of Motion (PROM): Gentle PROM may be initiated by the therapist if AROM is limited and fixation is deemed stable.
  • Tendon Gliding Exercises: To prevent adhesions.
  • Edema Management: Continued elevation, light compression, retrograde massage.
  • Scar Management: Gentle massage once the incision is healed.
• Strengthening: Very light, isometric grip strengthening may be introduced towards the end of this phase, based on radiographic evidence of early union and surgeon discretion.

Intermediate Phase (Weeks 6-12)

• Progression of Motion and Strengthening:
  • The splint is progressively weaned off for functional activities as tolerance increases. It may still be used for protection during sleep or strenuous activities.
  • Gradual increase in intensity and resistance for strengthening exercises:
    • Grip strength (e.g., squeeze putty, soft ball).
    • Pinch strength.
    • Wrist extensors, flexors, and forearm rotators (e.g., light weights, elastic bands).
  • Proprioceptive and dexterity exercises.
• Functional Activities: Gradual return to light activities of daily living (ADLs) and leisure activities.

Advanced Phase (Weeks 12+)

• Return to Full Activity:
  • Further progression of strengthening, incorporating higher loads and resistance.
  • Sport-specific or work-specific rehabilitation, including plyometrics and power training as appropriate for the patient's goals.
  • Full return to all activities, including high-impact sports, typically occurs between 3-6 months post-operatively, contingent on radiographic union, restoration of strength, and pain-free range of motion.
• Long-Term Monitoring: Patients are monitored for signs of post-traumatic arthritis, chronic pain, or DRUJ dysfunction. Hardware removal may be considered for symptomatic plates or screws after fracture union, typically after 6-12 months.

Considerations

• Fracture Stability: The stability of the fracture fixation dictates the aggressiveness of the rehabilitation protocol. Highly comminuted fractures or those with marginal fixation may require a more conservative approach initially.
• Patient Compliance: Patient adherence to the rehabilitation program is critical for optimal outcomes.
• Complications: The presence of complications (e.g., CRPS, infection, tendon rupture) necessitates modification or cessation of standard protocols and initiation of specialized management.
• Radiographic Union: Progression to more strenuous activities is typically guided by radiographic evidence of fracture union.

Summary of Key Literature / Guidelines

The management of distal radius fractures has been extensively studied, leading to evolving consensus and evidence-based guidelines.

1. Volar Locking Plates as Gold Standard: Numerous randomized controlled trials (RCTs) and meta-analyses consistently demonstrate that volar locking plates (VLPs) provide superior biomechanical stability compared to K-wire fixation or non-locking plates, particularly in unstable and comminuted fractures. This stability allows for earlier initiation of rehabilitation, leading to improved functional outcomes (e.g., DASH scores, grip strength, range of motion) and radiographic parameters (volar tilt, radial height, articular congruity) compared to traditional casting or external fixation, especially in active adult populations.
   • Reference: Orbay and Fernandez (2004) significantly popularized the use of volar fixed-angle plating.
2. Importance of Anatomical Reduction: The prevailing evidence emphasizes the critical importance of achieving and maintaining anatomical reduction, particularly restoration of volar tilt, radial height, radial inclination, and articular congruity. Malunion, especially significant dorsal angulation or articular step-off, is a strong predictor of long-term post-traumatic arthritis and functional impairment.
   • Reference: Frykman (1967) highlighted the correlation between anatomical reduction and functional outcomes, a principle further reinforced by modern literature.
3. Role of CT Imaging: For intra-articular fractures, pre-operative CT imaging is widely accepted as essential. It provides detailed visualization of articular step-offs, fragment size, and comminution, which are often underestimated on plain radiographs. This detailed information guides surgical strategy and implant selection.
4. Early Mobilization: The robust fixation provided by VLPs has largely shifted post-operative care towards early, controlled active and passive range of motion. This strategy aims to prevent stiffness, improve functional recovery, and reduce the incidence of complications like CRPS compared to prolonged immobilization.
   • Reference: Multiple studies have shown improved early functional outcomes with early mobilization protocols following stable ORIF.
5. Hardware Removal: Routine prophylactic hardware removal is generally not recommended unless the patient develops symptomatic hardware (e.g., irritation, pain, tendonitis, or rupture). The risks associated with a second surgery often outweigh the benefits in asymptomatic patients.
6. Complication Awareness: The literature highlights specific complications associated with volar plating, particularly flexor pollicis longus (FPL) rupture due to prominent distal screws or plates positioned too distally, crossing the watershed line. Meticulous surgical technique, precise plate positioning, and appropriate screw length selection are crucial for minimizing these risks.
   • Reference: Multiple case series and biomechanical studies have elucidated the mechanisms of FPL rupture.
7. Outcomes Assessment: Functional outcomes are commonly evaluated using validated patient-reported outcome measures (PROMs) such as the Disabilities of the Arm, Shoulder, and Hand (DASH) score, Michigan Hand Outcomes Questionnaire (MHQ), and Patient-Reported Outcomes Measurement Information System (PROMIS). Radiographic parameters, grip strength, and range of motion are objective measures.
8. AO Foundation Principles: The Arbeitsgemeinschaft für Osteosynthesefragen (AO Foundation) principles of fracture management (anatomical reduction, stable internal fixation, preservation of blood supply, and early active pain-free mobilization) remain fundamental to the successful surgical treatment of distal radius fractures.

In conclusion, the current literature strongly supports ORIF with volar locking plates as the preferred treatment for unstable distal radius fractures in most adult patients, emphasizing anatomical reduction, stable fixation, and structured early rehabilitation to optimize long-term functional outcomes and minimize complications. Ongoing research continues to refine surgical techniques, implant designs, and rehabilitation protocols.