Scapular Fractures: Epidemiology, Anatomy, Classification, and Management

Introduction & Epidemiology

Scapular fractures represent a relatively uncommon subset of skeletal trauma, accounting for approximately 0.5% to 1% of all fractures and 3% to 5% of all shoulder girdle injuries. Their infrequent occurrence is primarily attributed to the scapula's robust anatomical position, cushioned by significant muscular mass and protected by the rib cage and trunk. Consequently, scapular fractures are often indicative of high-energy trauma, such as motor vehicle collisions (MVCs), falls from height, or direct blunt force impact.

The association with high-energy mechanisms necessitates a comprehensive trauma evaluation. Polytrauma is a common presentation, with an incidence of associated injuries ranging from 35% to 90%. These can include ipsilateral upper extremity injuries (e.g., clavicle fractures, brachial plexus injury, glenohumeral dislocation), head and chest injuries (e.g., pneumothorax, hemothorax, pulmonary contusion, rib fractures, great vessel injury), and abdominal trauma. A significant mortality rate, often related to these concomitant injuries, has been reported in patients with scapular fractures. Therefore, initial management prioritizes assessment and stabilization of life-threatening conditions before focusing on the scapular injury itself.

Classification systems for scapular fractures aim to guide diagnosis, prognosis, and treatment. The most widely recognized systems include:
* AO/OTA Classification: A comprehensive system categorizing fractures by location (body, neck, glenoid) and fracture morphology (simple, wedge, multifragmentary).
* Ideberg Classification (for glenoid fractures): Focuses specifically on intra-articular glenoid fractures, categorizing them from Type I (anterior rim) to Type VI (glenoid with scapular body/neck dissociation). This system is crucial for evaluating articular involvement and instability.
* Orthopaedic Trauma Association (OTA) Classification: A standardized anatomical and morphological system.
* Consensus Classification (e.g., Kavanagh and Kuhne): Attempts to provide a practical system for communication and treatment planning.

Despite their varied morphology and often high-energy etiology, the majority (approximately 85-90%) of scapular fractures are amenable to non-operative management. This predisposition towards non-surgical treatment is largely due to the surrounding musculature acting as a natural splint and the broad surface area available for healing. Surgical intervention is typically reserved for a select subset of fractures where significant displacement, articular involvement, or mechanical instability compromises shoulder function or has a high probability of leading to long-term disability.

Surgical Anatomy & Biomechanics

A thorough understanding of scapular anatomy and biomechanics is paramount for both non-operative management and surgical planning. The scapula is a flat, triangular bone providing attachment for 17 muscles, facilitating both stability and mobility of the shoulder girdle.

Surgical Anatomy

• Scapular Body: The broad, flat central portion, subdivided into the infraspinous and supraspinous fossae, separated by the scapular spine. Fractures here are typically extra-articular and often minimally displaced due to the extensive muscular attachments (e.g., subscapularis anteriorly, infraspinatus/teres minor posteriorly).
• Scapular Spine: A prominent ridge that terminates laterally as the acromion. It serves as an attachment for the deltoid and trapezius muscles.
• Acromion: The lateral extension of the scapular spine, forming the roof of the glenohumeral joint. It articulates with the clavicle to form the acromioclavicular (AC) joint and provides significant attachment for the deltoid. Fractures here can compromise the superior shoulder suspensory complex (SSSC).
• Coracoid Process: A hook-like anterior projection serving as an attachment point for the pectoralis minor, coracobrachialis, and short head of the biceps, as well as the coracoacromial, coracoclavicular (conoid and trapezoid ligaments), and coracohumeral ligaments. Fractures can disrupt the SSSC and affect shoulder stability.
• Glenoid Fossa: The shallow, pear-shaped articular surface that articulates with the humeral head. It is critical for glenohumeral joint stability and function. Fractures here can be intra-articular and often require precise reduction.
• Scapular Neck: The constricted area connecting the body to the glenoid, acromion, and coracoid. Fractures here are typically extra-articular but can involve glenoid displacement and angulation.

Neurovascular Structures of Importance:

• Suprascapular Nerve: Originates from the upper trunk of the brachial plexus (C5-C6), passes through the suprascapular notch (inferior to the superior transverse scapular ligament) to innervate the supraspinatus, then courses around the spinoglenoid notch (inferior to the spinoglenoid ligament) to innervate the infraspinatus. It is highly susceptible to injury with scapular neck fractures, especially those involving the spinoglenoid notch or with significant displacement.
• Axillary Nerve: Arises from the posterior cord (C5-C6), exits the quadrilateral space, and innervates the deltoid and teres minor. It is vulnerable with glenohumeral dislocations or inferior scapular fractures.
• Subscapular Artery: A branch of the axillary artery, which gives rise to the circumflex scapular artery and thoracodorsal artery. The circumflex scapular artery passes through the triangular space and supplies the infraspinatus and teres minor. These vessels are important to consider during posterior approaches.
• Dorsal Scapular Artery: Typically arises from the deep branch of the transverse cervical artery or directly from the subclavian artery. It courses along the medial border of the scapula, supplying the rhomboids and levator scapulae.

Biomechanics

The scapula functions as the cornerstone of the shoulder girdle, providing the mobile and stable platform from which the upper extremity operates. Its biomechanical roles include:
* Scapulothoracic Rhythm: Synchronized movement of the scapula and humerus (approximately 2:1 ratio) is essential for full range of motion and pain-free movement. Fractures can disrupt this rhythm.
* Glenohumeral Stability: The glenoid provides a socket for the humeral head. Its orientation and congruity are crucial for maintaining stability. Glenoid fractures that alter the articular surface or glenoid version can lead to instability and early osteoarthritis.
* Muscle Origin/Insertion: The numerous muscular attachments allow for a wide range of shoulder movements and provide dynamic stability. Fractures can disrupt these origins/insertions, leading to muscle imbalance and weakness.
* Superior Shoulder Suspensory Complex (SSSC): A bony and ligamentous ring composed of the glenoid, coracoid, coracoclavicular ligaments, distal clavicle, and acromion. Disruption of this ring at two or more points (e.g., scapular neck fracture and clavicle fracture - "floating shoulder") can lead to severe instability, medial displacement of the glenoid, and poor functional outcomes if not properly addressed.

Fractures of the scapula often result from a force vector applied to the posterior or lateral aspect of the shoulder, driving the scapula against the thoracic cage. The resulting fracture pattern is dictated by the direction and magnitude of the force, as well as the point of impact. Understanding these forces and their effects on the scapula's intricate biomechanics is crucial for deciding on the appropriate treatment strategy.

Indications & Contraindications

The decision-making process for scapular fractures is complex, weighing fracture characteristics, associated injuries, patient comorbidities, and functional demands. While most scapular fractures heal with non-operative management, specific criteria guide the selection of surgical candidates.

Non-Operative Indications

Non-operative treatment, typically involving immobilization, pain management, and early rehabilitation, is the mainstay for the majority of scapular fractures. Key indications include:
* Scapular Body Fractures: Most body fractures, even if displaced, are treated non-operatively due to the surrounding muscle envelope providing natural stabilization and the low incidence of functional compromise from malunion. Exceptions might be severely displaced body fractures with impingement on the thoracic cage or brachial plexus.
* Minimally Displaced Scapular Neck Fractures: Fractures with less than 1 cm of displacement and minimal angulation (<30-45 degrees, depending on anterior/posterior angulation).
* Stable Glenoid Fractures (Ideberg Type I-III):
* Type I (Glenoid Rim Fractures): Small avulsion fractures of the anterior or posterior rim with no significant glenohumeral instability and minimal articular step-off (<2-3 mm).
* Type II (Glenoid Fossa Fractures): Fractures involving a portion of the inferior glenoid fossa, if displacement is minimal (<2-3 mm) and there is no glenohumeral subluxation.
* Type III (Glenoid Fossa Fractures): Fractures involving the superior glenoid extending to the scapular spine, if displacement is minimal (<2-3 mm) and there is no instability.
* Stable Acromial and Coracoid Fractures: Non-displaced or minimally displaced acromial fractures without involvement of the SSSC. Coracoid fractures with minimal displacement and intact coracoclavicular ligaments.
* Elderly or Medically Comorbid Patients: Patients with significant health issues where surgical risks outweigh potential benefits, even for fractures that might otherwise be considered for operative fixation.
* Low Functional Demand Patients: Individuals with limited mobility or pre-existing conditions that preclude a return to high-demand activities.

Operative Indications

Surgical intervention aims to restore anatomy, joint congruity, and shoulder mechanics, thereby preventing long-term pain, instability, and dysfunction. Operative indications are generally relative and must be individualized.
* Glenoid Fractures (Intra-articular):
* Articular Step-Off: >2-3 mm displacement of the articular surface (especially Type II-VI Ideberg fractures).
* Glenohumeral Instability: Any fracture resulting in frank glenohumeral subluxation or dislocation that remains unstable after reduction.
* Large Anterior or Posterior Rim Fractures: Involving >25% of the glenoid surface, especially if associated with recurrent instability.
* Ideberg Type IV, V, VI: These complex patterns often involve significant articular disruption and are frequently unstable, requiring fixation.
* Scapular Neck Fractures:
* Significant Angulation: >30-45 degrees of angulation (anterior, posterior, or inferior) of the glenoid neck fragment relative to the body, particularly if affecting glenoid version or inclination.
* Significant Displacement: >1 cm translation of the glenoid fragment.
* Medialization of the Glenoid: Significant shift (e.g., >20 mm) of the glenoid relative to the thoracic cage, impacting shoulder kinematics.
* "Floating Shoulder" (Ipsilateral Scapular Neck and Clavicle Fracture): This bicortical disruption of the SSSC often leads to superior migration and medialization of the glenoid. While some studies suggest non-operative treatment for stable variants, operative fixation of at least one component (typically the clavicle, sometimes both) is often recommended, especially in significantly displaced cases or high-demand patients, to restore shoulder stability and mechanics.
* Coracoid Fractures:
* Displaced base fractures: Associated with disruption of the coracoclavicular ligaments, particularly if the SSSC is compromised.
* Coracoid Fractures with Acromial Fractures: Indicating significant instability.
* Acromial Fractures:
* Displaced fractures compromising the subacromial space: Potentially leading to impingement or rotator cuff dysfunction.
* Fractures involving the AC joint: Causing instability or significant displacement.
* Fractures disrupting the SSSC.
* Open Scapular Fractures: Require débridement and stabilization.
* Associated Brachial Plexus Injury: While not a direct indication for fixation, stabilization of unstable scapular fractures may facilitate nerve recovery or reconstruction.

Contraindications

Absolute contraindications to surgery are rare and usually relate to the patient's general health or local soft tissue conditions.
* Severe Medical Comorbidities: Uncontrolled cardiac, pulmonary, or systemic conditions that significantly increase anesthetic and surgical risk.
* Active Infection: Localized infection at the surgical site.
* Poor Soft Tissue Envelope: Severe crush injury, extensive degloving, or avascular tissue that precludes safe wound closure or stable hardware placement.
* Non-Displaced or Minimally Displaced Fractures: Where surgical intervention would provide no additional benefit over non-operative care.

Summary of Operative vs. Non-Operative Indications

Pre-Operative Planning & Patient Positioning

Meticulous pre-operative planning is essential for successful surgical outcomes in scapular fractures, particularly given their complex anatomy and potential for associated injuries.

Imaging and Assessment

1. Standard Radiographs: Anteroposterior (AP), Y-view (scapular lateral), and axillary views are baseline. These provide initial assessment of fracture pattern, displacement, and joint involvement.
2. Computed Tomography (CT) Scan: Indispensable for complex scapular fractures, especially those involving the glenoid, neck, or for cases of suspected "floating shoulder."
   • Axial, Sagittal, Coronal Views: Crucial for assessing articular step-off, comminution, and fragment orientation.
   • 3D Reconstructions: Provide an invaluable global perspective of the fracture pattern, aid in identifying critical fragments, and allow for virtual pre-reduction and plating simulation.
   • Contralateral Scapula CT: Can be useful for templating or comparing anatomy in complex cases, though less commonly performed.
3. Magnetic Resonance Imaging (MRI): Rarely indicated for acute fracture assessment but may be considered for evaluating associated soft tissue injuries (e.g., rotator cuff tears, labral tears, brachial plexus injury) if clinically suspected or if neurologic symptoms are present.
4. Neurovascular Assessment: Thorough pre-operative neurovascular examination is critical due to the proximity of the brachial plexus and major vessels. Document any deficits.
5. Associated Injuries Workup: Given the high-energy nature, a full trauma workup must confirm the absence of life-threatening head, chest, abdominal, or other orthopedic injuries.

Surgical Goals

• Restoration of glenoid articular congruity (for intra-articular fractures).
• Restoration of the mechanical axis of the glenoid (for neck fractures).
• Stabilization of the scapular platform to facilitate rotator cuff function.
• Prevention of impingement.
• Minimization of neurovascular compromise.

Pre-Operative Templating and Planning

• Using CT 3D reconstructions, identify the primary fracture fragments and the optimal approach.
• Plan incision placement, plate trajectory, and screw length. Consider available plate options (e.g., reconstruction plates, precontoured scapular plates).
• Anticipate challenges such as comminution, difficulty in reduction, and potential neurovascular structures at risk.
• Determine the need for specific instruments, such as small fragment sets, pointed reduction clamps, and specialized glenoid hooks.

Patient Positioning

The choice of patient position significantly impacts surgical access and intraoperative maneuverability.
1. Prone Position:
* Advantages: Provides excellent exposure to the posterior scapular body, spine, acromion, and posterior glenoid. It allows for a more direct approach to posterior fracture fragments. Gravity can assist in reducing certain fracture patterns.
* Setup: Patient is carefully placed prone on a radiolucent table or a spinal frame (e.g., Jackson table). The ipsilateral arm is often prepped and draped free to allow for intraoperative manipulation for reduction assessment, though some surgeons prefer the arm adducted and internally rotated. Care must be taken to pad all pressure points and ensure adequate respiratory excursion.
* Fluoroscopy: C-arm access is critical for confirming reduction and hardware placement. A pillow or bolster under the chest may improve scapular prominence and facilitate imaging.
2. Lateral Decubitus Position:
* Advantages: Offers good access to the posterior and lateral scapula, including the glenoid, neck, and lateral body. The patient can be positioned such that the affected side is superior. This position allows for a more relaxed soft tissue envelope.
* Setup: Patient is placed in a lateral decubitus position, usually with a beanbag for stabilization. The ipsilateral arm is typically prepped and draped free in an arm holder or on a sterile hand table, allowing full manipulation and assessment of range of motion. Careful padding of dependent extremities and nerve plexuses is essential.
* Fluoroscopy: C-arm access is generally straightforward.
3. Beach Chair Position:
* Advantages: Primarily used for anterior or anterolateral approaches to the glenoid or coracoid, particularly if associated with clavicle fixation.
* Setup: Patient is placed in a semi-sitting position. The ipsilateral arm is prepped and draped free.
* Fluoroscopy: Can be more challenging to obtain optimal scapular views in this position.

Regardless of position, ensure adequate padding of all pressure points, careful documentation of pre-operative neurological status, and readily available fluoroscopy. Prophylactic antibiotics and appropriate regional or general anesthesia are standard.

Detailed Surgical Approach / Technique

The surgical approach to scapular fractures is dictated by the fracture location and morphology, as identified during pre-operative planning. The most common approaches are posterior, with variations allowing access to specific regions.

Judet Approach (Posterior Approach)

This is the most versatile and frequently used approach for scapular body, neck, spine, and glenoid fractures.

1. Incision: A curvilinear or S-shaped incision is made parallel to the medial border of the scapula, extending superiorly to the scapular spine and curving laterally over the acromion if needed for acromial or lateral scapular neck exposure. For isolated posterior glenoid fractures, a more limited incision over the scapular spine with an infraspinatus split may suffice.

2. Dissection & Internervous Planes:

   • Skin and Subcutaneous Tissue: Incision deepened to the deep fascia.
   • Trapezius and Deltoid: The trapezius muscle is incised along the scapular spine or detached from its insertion (careful, as the spinal accessory nerve runs deep to the trapezius superiorly). The deltoid origin from the scapular spine can be partially detached, either directly from the spine or through an intramuscular split. The internervous plane here involves the trapezius (spinal accessory nerve) and the deltoid (axillary nerve).
   • Exposure of Infraspinatus Fossa: The deltoid and trapezius are reflected superiorly and laterally. The infraspinatus muscle is exposed.
   • Infraspinatus Split: For fractures of the glenoid and neck, the infraspinatus muscle can be split longitudinally, staying close to the scapular spine. This allows access to the posterior scapular neck and glenoid. The suprascapular nerve and vessels lie deep to the infraspinatus, coursing through the spinoglenoid notch. Caution: Preserve the suprascapular nerve at the spinoglenoid notch, which is approximately 2.5-3 cm medial to the posterior glenoid rim. Injury here can lead to denervation of the infraspinatus.
   • Between Infraspinatus and Teres Minor: For more inferior posterior access to the lateral border, the interval between the infraspinatus (suprascapular nerve) and teres minor (axillary nerve) can be developed.
   • Lateral Border: The teres minor and teres major are retracted to expose the lateral border of the scapula. The axillary nerve and posterior circumflex humeral artery exit the quadrilateral space, running close to the inferior glenoid neck and must be protected.

3. Fracture Reduction:

   • Visualization: Once exposed, the fracture fragments are meticulously cleared of hematoma and debris.
   • Indirect Reduction: Ligamentotaxis (traction on the arm) can sometimes aid in initial alignment, particularly for neck fractures.
   • Direct Reduction: Use pointed reduction clamps, K-wires (acting as joysticks), bone hooks, or small periosteal elevators to manipulate and reduce the fragments. For glenoid fractures, direct visualization of the articular surface (often through a split in the infraspinatus) is critical to ensure anatomical reduction.
   • Temporary Fixation: K-wires are often used to secure reduced fragments temporarily.

4. Internal Fixation:

   • Plate Selection: Small fragment plates (e.g., 2.7 mm, 3.5 mm) are typically used. Reconstruction plates are versatile for contouring, while precontoured scapular plates are increasingly available and can simplify fixation, especially for glenoid and neck fractures.
   • Plate Placement:
     • Scapular Neck/Body: Plates are often placed along the lateral border, the scapular spine, or the posterior aspect of the body, creating a stable construct. For neck fractures, the plate extends from the glenoid fragment onto the scapular body, providing buttress and neutralization. Screws must be unicortical or bicortical, ensuring safe trajectories away from neurovascular structures.
     • Glenoid Fractures: Requires precise reduction and often multiple plates or screws. For Ideberg Type I-III, small fragment plates or headless compression screws may be used. For Type IV-VI, a robust construct with plates along the posterior glenoid pillar, extending onto the body and possibly the scapular spine, is necessary. Screws must be strategically placed to avoid violating the articular surface or damaging the suprascapular nerve. Bicortical screws provide better purchase, but their trajectory must be carefully planned.
     • Acromial Fractures: Small plates (e.g., 2.0 or 2.4 mm) or tension band wiring can be used, often extending onto the scapular spine.
     • Coracoid Fractures: Small fragment plates or screws, often via an anterior approach (deltopectoral), depending on the fracture pattern and associated injuries.
   • Screw Selection: Cortical screws are generally preferred for diaphyseal fixation; cancellous screws may be used in metaphyseal bone or for lag screw fixation.
   • Stability Assessment: After fixation, the shoulder is gently moved through a range of motion to assess stability and ensure hardware does not impinge.

Anterolateral Approach

Used primarily for anterior glenoid rim fractures (e.g., Ideberg Type I) or coracoid fractures, sometimes in combination with clavicle fixation.
* Incision: A deltopectoral incision or a modified saber-cut incision.
* Dissection: The interval between the deltoid and pectoralis major is developed. The cephalic vein is identified and preserved. The conjoined tendon (coracobrachialis, short head of biceps) and pectoralis minor are identified. For anterior glenoid, subscapularis may be taken down or split.
* Neurovascular Protection: The musculocutaneous nerve pierces the coracobrachialis, and the axillary nerve is inferior.

Special Considerations

• Floating Shoulder: Often requires fixation of both the clavicle and the scapular neck. The clavicle is typically addressed first via a superior approach, which helps restore the length of the superior shoulder suspensory complex. Then, the scapular neck is addressed via a posterior approach. Some surgeons advocate for only clavicle fixation if the scapular neck displacement is then sufficiently reduced and stable.
• Open Fractures: Require thorough débridement, irrigation, and staged fixation.

Complications & Management

Despite meticulous surgical technique, complications can occur after both operative and non-operative management of scapular fractures. Early identification and appropriate management are crucial for optimizing patient outcomes.

Common Complications and Management Strategies

Detailed Management Considerations

• Nonunion/Malunion: A common concern, especially for intra-articular glenoid fractures or significantly displaced neck fractures managed non-operatively, or if operative fixation fails. Glenoid malunion can lead to chronic pain, instability, and early osteoarthritis due to abnormal stress distribution. Scapular neck malunion can alter the glenoid's version and inclination, leading to impingement or instability.
• Neurovascular Injury: The suprascapular nerve is particularly vulnerable at the spinoglenoid notch during posterior approaches and with highly displaced scapular neck fractures. The axillary nerve is at risk with inferior glenoid/lateral border fractures. Careful dissection, identification, and protection are paramount. Post-operative neurological assessment is crucial; persistent deficits warrant electromyography (EMG) and nerve conduction studies (NCS) to differentiate neurapraxia from axonotmesis or neurotmesis.
• Infection: As with all open reductions and internal fixations, infection is a risk. Strict sterile technique, appropriate prophylactic antibiotics, and careful soft tissue handling are essential.
• Post-Traumatic Osteoarthritis (PTOA): A significant long-term complication following intra-articular glenoid fractures, even after anatomical reduction. Patient age, fracture comminution, and pre-existing arthritis are risk factors. Management ranges from conservative to arthroplasty.
• Shoulder Stiffness: Immobilization, even for short periods, can lead to stiffness. Early, controlled range of motion is a cornerstone of post-operative rehabilitation.

Prevention is key: meticulous pre-operative planning, appropriate surgical technique with careful soft tissue handling, and adherence to evidence-based post-operative rehabilitation protocols are the best defenses against these complications.

Post-Operative Rehabilitation Protocols

Post-operative rehabilitation following surgical fixation of scapular fractures is critical for restoring optimal shoulder function, preventing stiffness, and protecting the surgical repair. Protocols vary based on fracture type, stability of fixation, and surgeon preference, but generally follow a phased approach.

General Principles

• Protect Fixation: The primary goal in the early phases is to protect the surgically repaired fracture fragments to allow for bone healing.
• Gradual Progression: Rehabilitation progresses incrementally, from passive to active motion, and then to strengthening, based on clinical healing and patient tolerance.
• Early Motion: While protecting the fixation, controlled early range of motion (ROM) helps prevent stiffness, particularly of the glenohumeral joint.
• Scapular Control: Emphasis on restoring scapular kinematics and muscle balance is crucial for overall shoulder function.
• Pain Management: Adequate pain control facilitates participation in therapy.

Phased Rehabilitation Protocol

Phase I: Immobilization & Early Motion (Weeks 0-6)

• Goals: Protect fixation, minimize pain and swelling, prevent stiffness of uninvolved joints, initiate controlled passive ROM.
• Immobilization:
  • Sling or shoulder immobilizer for comfort and protection. Duration typically 2-6 weeks, depending on fixation stability and fracture type. Some surgeons advocate for early discontinuation of the sling, using it primarily for comfort.
• Exercises (Daily):
  • Elbow, Wrist, Hand ROM: Active motion to prevent stiffness.
  • Cervical Spine ROM: Gentle active motion.
  • Pendulum Exercises: Gentle, pain-free circumduction for gravity-assisted passive motion (with or without sling off, as tolerated).
  • Passive Range of Motion (PROM) of Shoulder:
    • Forward flexion: To tolerance, often limited to 60-90 degrees initially.
    • External rotation: To tolerance, often limited to 0-30 degrees initially.
    • Internal rotation: To tolerance.
    • Performed by a therapist or with the unaffected arm. No active shoulder abduction or external rotation against resistance initially.
  • Scapular Setting/Isometrics: Gentle scapular retraction and depression without humeral motion to activate periscapular muscles.
• Precautions: No active shoulder ROM, no lifting, pushing, or pulling with the affected arm. Avoid weight-bearing through the arm. No reaching behind the back or overhead.

Phase II: Active Motion & Intermediate Strengthening (Weeks 6-12)

• Goals: Restore full, pain-free active ROM, initiate gentle strengthening, improve scapular stability.
• Discontinuation of Sling: As tolerated, typically around 4-6 weeks, when fracture site tenderness decreases and radiographs show signs of early union.
• Exercises:
  • Active-Assisted Range of Motion (AAROM): Using a wand or pulley system to increase shoulder ROM.
  • Active Range of Motion (AROM): Progress from gravity-eliminated positions to upright, working towards full flexion, abduction, and rotation.
  • Isometrics: Gentle isometric strengthening of rotator cuff and deltoid muscles (e.g., against wall), avoiding pain.
  • Scapular Stabilization Exercises: Prone scapular retraction (e.g., "T's and Y's"), progressing to light resistance with elastic bands.
  • Proprioception and Neuromuscular Control: Begin with exercises like rhythmic stabilization.
• Precautions: No heavy lifting. Avoid sudden movements or positions that stress the repair. Limit resistance initially.

Phase III: Advanced Strengthening & Return to Activity (Weeks 12+)

• Goals: Restore full strength and endurance, optimize neuromuscular control, facilitate return to sport or high-demand activities.
• Exercises:
  • Progressive Resistive Exercises (PREs): Using elastic bands, light weights, and machines. Focus on rotator cuff (internal/external rotation), deltoid (flexion, abduction), and periscapular muscles (rows, presses).
  • Functional Training: Incorporate multi-planar movements, overhead activities, and sport-specific drills.
  • Plyometrics: For athletes, introduce plyometric exercises with appropriate timing.
  • Endurance Training: Light weights, high repetitions.
• Return to Activity:
  • Light Work/Daily Activities: Typically 3-4 months post-op.
  • Heavy Lifting/Manual Labor/Sports: Gradually phased return, often 4-6 months, or longer for contact sports. This depends heavily on fracture healing and functional recovery. Radiographic confirmation of union is often sought before unrestricted activities.
• Precautions: Listen to the body, avoid pain. Ensure proper technique to prevent compensatory movements or re-injury.

Monitoring: Regular clinical follow-up is essential to assess pain, ROM, strength, and identify any complications. Radiographic assessment should monitor fracture healing. A physical therapist experienced in shoulder rehabilitation is a critical team member. The protocol must be individualized based on the patient's progress and the stability of the fracture fixation.

Summary of Key Literature / Guidelines

The understanding and management of scapular fractures have evolved significantly, driven by improved imaging, surgical techniques, and a better appreciation of shoulder biomechanics. While a consensus on every nuanced aspect remains elusive, several key principles and themes emerge from the literature.

1. High-Energy Trauma and Associated Injuries: A consistent finding across numerous studies, including those by Zdravkovic and Damholt (1974) , Goss (1995) , and Ferris et al. (2015) , is the strong association of scapular fractures with high-energy trauma and significant concomitant injuries. This underscores the need for a comprehensive trauma workup, prioritizing life-threatening conditions. The mortality rate directly related to the scapular fracture itself is low; mortality is almost exclusively due to associated injuries.

2. Prevalence of Non-Operative Management: The vast majority of scapular fractures are successfully treated non-operatively. Hardegger et al. (1984) , Kavanagh et al. (2004) , and others have shown good to excellent outcomes for non-operative treatment of body and minimally displaced neck fractures. The rich muscular envelope surrounding the scapula is often cited as a key factor in stability and healing.

3. Indications for Operative Fixation: The primary drivers for surgical intervention are consistently identified as:

   • Displaced Intra-articular Glenoid Fractures: Articular step-off >2-3 mm (e.g., Ideberg Type II-VI ) is a widely accepted threshold for surgical consideration to prevent post-traumatic osteoarthritis and instability. Studies by van Oostveen et al. (2014) and Kavanagh and Kuhne (2004) highlight the importance of anatomical reduction for glenoid fractures.
   • Displaced Scapular Neck Fractures with Glenoid Malorientation: Significant angulation (>30-45 degrees) or translation (>1 cm) of the glenoid fragment, impacting glenoid version or inclination, is a strong indication. This is supported by biomechanical studies showing how subtle changes in glenoid orientation profoundly affect glenohumeral kinematics.
   • The "Floating Shoulder": While historically controversial, contemporary literature, particularly from groups like Goss (1995) , Toshimitsu (2012) , and Mayo et al. (2013) , often advocates for surgical stabilization (typically of the clavicle, sometimes both clavicle and scapular neck) in significantly displaced floating shoulder injuries, especially in high-demand patients or when there is significant medial displacement of the glenoid. However, the precise indications for single vs. double plating remain debated, with some studies suggesting similar outcomes with clavicle-only fixation if sufficient stability is achieved.
   • Certain Displaced Acromial/Coracoid Fractures: Those that disrupt the superior shoulder suspensory complex (SSSC) or cause subacromial impingement are operative candidates.

4. Role of CT and 3D Reconstruction: The advent of routine CT scanning with 3D reconstructions has revolutionized diagnosis and surgical planning for scapular fractures. As highlighted by Kim et al. (2006) and many contemporary surgical texts (e.g., Rockwood and Green's Fractures in Adults ), CT is essential for accurately characterizing complex fracture patterns, especially glenoid involvement, and for pre-operative templating.

5. Surgical Approaches and Fixation Principles: The Judet approach (posterior) remains the workhorse for most scapular fractures, offering excellent exposure to the body, neck, and posterior glenoid. Literature by Judet et al. (1964) laid the foundation, and subsequent modifications have refined it. Plate and screw fixation (2.7mm or 3.5mm systems, often reconstruction or precontoured plates) is the standard. Principles of buttress plating for glenoid and tension band plating are emphasized.

6. Complications: Common complications include malunion, post-traumatic arthritis (especially in glenoid fractures), neurovascular injury (suprascapular nerve vulnerability), and stiffness. Zelle et al. (2005) and others report varying rates of these complications, emphasizing the need for meticulous surgical technique and aggressive rehabilitation.

7. Rehabilitation: While specific protocols vary, the overarching principle is a phased, progressive approach, balancing protection of the repair with early, controlled motion to prevent stiffness and optimize functional recovery. Most authors advocate for an initial period of immobilization followed by gradual progression to active motion and strengthening, often emphasizing early scapular stabilization.

Despite these advancements, areas of ongoing research and debate include:
* The optimal management of specific Ideberg glenoid fracture types (e.g., when non-operative is truly safe for Type II/III with borderline displacement).
* The precise role and optimal configuration of fixation for all "floating shoulder" variants.
* Long-term outcomes of operative vs. non-operative treatment for certain fracture patterns in varying patient populations.
* The impact of minimally invasive or arthroscopic-assisted techniques for certain scapular fractures.

Overall, the literature underscores that surgical intervention for scapular fractures is a complex decision, reserved for cases with clear indications where the benefits of restoring anatomical alignment and stability outweigh the risks, leading to improved long-term functional outcomes. Continued research will undoubtedly refine these guidelines further.