Long Island Elbow Fracture
Lawyer

The elbow is not a single joint but a complex articulation between three bones at a common synovial capsule. The distal humerus forms the superior component: the medial and lateral condyles diverge distally, with the trochlea medially (articulating with the semilunar notch of the ulna for hinge motion) and the capitellum laterally (articulating with the radial head for both hinge and rotational motion). The proximal radius contributes the radial head — the disc-shaped proximal end of the radius that articulates with the capitellum of the humerus and the radial notch of the proximal ulna at the proximal radioulnar joint, enabling forearm rotation (pronation and supination). The proximal ulna contributes the olecranon (the bony prominence of the posterior elbow to which the triceps inserts) and the coronoid process (the anterior beak of the ulna that provides the critical anterior buttress against posterior elbow dislocation — the coronoid is the single most important bony stabilizer against posterior translation).

Three joints function within the common elbow capsule: the humeroulnar joint provides the primary hinge motion (flexion 0–145 degrees, extension 0 degrees); the humeroradial joint participates in both hinge and rotational motion; and the proximal radioulnar joint provides forearm rotation (pronation 85 degrees, supination 90 degrees). Three ligament complexes stabilize the elbow: the ulnar collateral ligament (UCL) medially (anterior bundle — the primary medial stabilizer against valgus stress, often injured in terrible triad and medial epicondyle avulsion); the radial collateral/lateral ulnar collateral ligament (LUCL) laterally (the LUCL is the primary lateral stabilizer, torn in elbow dislocation and terrible triad injuries); and the annular ligament (encircles the radial head, retaining it within the radial notch of the ulna, disrupted in Monteggia fractures).

Radial Head Fractures: Mason Classification

Radial head fractures are the most common elbow fractures in adults, accounting for approximately 30% of all elbow fractures. They result from axial compression of the radial head against the capitellum, classically from a fall on an outstretched hand (FOOSH) or from airbag deployment in a car accident. The Mason classification guides treatment: Type I — undisplaced fracture with less than 2 mm of displacement, no articular step-off, no mechanical block to forearm rotation; managed non-operatively with collar and cuff and early range of motion at 1–2 weeks. Type II — partial articular fracture with more than 2 mm of displacement or articular step-off; ORIF with Herbert screws if block to rotation exists or displacement is significant. Type III — comminuted fracture involving the entire radial head, unreconstructable; treated with radial head replacement using a modular metal prosthesis (pyrocarbon or metal-on-polyethylene). Type IV — radial head fracture associated with elbow dislocation (the terrible triad context). An important associated injury is the Essex-Lopresti lesion: disruption of the interosseous membrane combined with radial head fracture and distal radioulnar joint injury, causing longitudinal forearm instability requiring radial head replacement (not simple ORIF) to maintain forearm length.

Olecranon Fractures: Mayo Classification

Olecranon fractures result from direct impact to the posterior elbow (dashboard, door, ground impact) or from avulsion of the olecranon by the triceps (typically in a fall on outstretched hand with reflexive triceps contraction). The Mayo classification guides treatment: Type I — undisplaced (less than 2 mm), triceps mechanism intact; managed non-operatively in a posterior splint at 60–90 degrees for 3–4 weeks. Type II — displaced fracture, stable elbow (no ligamentous instability); ORIF required — tension band wiring for simple transverse fractures, posterior plate fixation for oblique or comminuted patterns. Type III — displaced with elbow instability; plate fixation with ligamentous assessment and repair. Hardware prominence from tension band wires is the most common reason for second surgery (hardware removal) in olecranon fractures, occurring in up to 80% of patients treated with tension band technique. Plate-and-screw fixation produces lower hardware removal rates but requires a larger incision.

Distal Humerus Fractures: AO/OTA Classification

Distal humerus fractures are the most surgically complex elbow fractures. The AO/OTA classification divides them: Type A — extraarticular (supracondylar); Type B — partial articular (single column, lateral or medial condyle); Type C — complete articular (both columns disrupted — the classic intercondylar Y/T fracture pattern). Type C fractures involve articular surface disruption, which means any residual articular incongruity — even 1–2 mm of step-off — accelerates post-traumatic elbow arthritis. The gold standard for surgical fixation is dual-column plating: two pre-contoured anatomic plates applied at approximately 90 degrees to each other on the medial and lateral columns, with lag screws for articular reduction. Exposure is typically through a posterior approach using an olecranon osteotomy (parachute technique) or a triceps-reflecting approach. In severely comminuted distal humerus fractures in elderly or osteoporotic patients, total elbow arthroplasty (TEA) — elbow replacement — may be performed as primary treatment, permanently eliminating the joint and requiring strict lifting restrictions (less than 1 kg for life).

Coronoid Fractures: Regan-Morrey Classification

The coronoid process is the anterior beak of the proximal ulna and the primary bony restraint against posterior elbow dislocation. Coronoid fractures rarely occur in isolation — they almost universally occur as part of terrible triad injuries or complex elbow instability patterns. The Regan-Morrey classification guides fixation approach: Type I — tip fracture (less than 10% of coronoid height); usually does not require fixation in isolation but must be repaired in terrible triad to restore stability. Type II — fracture involving less than 50% of coronoid height; requires fixation with suture lasso technique (suture passed through drill holes in ulna) or screw fixation if fragment is large enough. Type III — fracture involving more than 50% of coronoid height; larger fragment allows screw fixation; most critical for elbow stability reconstruction.

The Terrible Triad: Classic MVA Elbow Injury

The terrible triad — posterior elbow dislocation combined with radial head fracture and coronoid fracture — is the most complex and highest-value elbow injury in car accident litigation. It occurs when the elbow is flexed and the hand is braced against the dashboard or steering wheel at the moment of impact: the impulsive force drives the forearm posteriorly relative to the humerus, dislocating the elbow, while axial compression fractures the radial head and shear forces fracture the coronoid. The "terrible" designation reflects the historically poor outcomes: without surgical reconstruction, the elbow re-dislocates, and even with technically perfect surgery, many patients experience permanent stiffness, recurrent instability, and early arthritis. Surgical reconstruction follows a strict sequence: coronoid repair first (restoring the primary bony buttress), then radial head fixation or replacement (restoring the secondary stabilizer), then LUCL repair/reconstruction (restoring lateral ligamentous stability), followed by fluoroscopic stability assessment in a hinged external fixator if residual instability is present. Residual elbow instability with recurrent subluxation, persistent stiffness with extension deficit greater than 30 degrees, and early post-traumatic arthritis are the most common complications and the primary determinants of long-term case value.

Monteggia Fracture

The Monteggia fracture is a proximal ulna fracture combined with proximal radioulnar joint dislocation. The Bado classification identifies four types based on the direction of radial head dislocation: Bado Type I (anterior radial head dislocation — most common, 70%) results from hyperpronation mechanism; Bado Type II (posterior) from axial loading; Bado Type III (lateral) from a varus force. Surgical treatment requires ORIF of the ulna fracture and confirmation of spontaneous radial head reduction under fluoroscopy. Failure to recognize the radial head dislocation — which can be subtle on X-ray if the radiocapitellar line is not checked on every elbow lateral view — results in chronic posterior interosseous nerve palsy and radioulnar instability.

Imaging: What to Order and Why

X-ray (AP, lateral, oblique): The standard initial imaging modality. The lateral view is diagnostically essential: the posterior fat pad sign — posterior displacement of the posterior fat pad out of the olecranon fossa, visible as a bright triangle posterior to the distal humerus on the lateral X-ray — indicates a joint effusion from hemarthrosis and identifies an occult radial head fracture even when no fracture line is visible. This finding alone is sufficient to diagnose and classify as a fracture per se under §5102(d). The radiocapitellar line (a line through the center of the radial neck should pass through the center of the capitellum on all views) must be checked to exclude radial head dislocation in Monteggia fractures.

CT scan: Mandatory for distal humerus fractures (defines articular comminution, column involvement, and fragment displacement for surgical planning), complex radial head fractures (Mason Type II with uncertain displacement and block), terrible triad injuries (coronoid fragment size for Regan-Morrey classification), and post-operative assessment for heterotopic ossification or non-union. CT scan findings documenting articular comminution and step-off are the primary radiological evidence of post-traumatic arthritis risk in litigation.

MRI: Optimal for ligamentous injury assessment (UCL, LUCL integrity in elbow dislocation and instability), cartilage evaluation, occult fractures not visible on plain film, and soft tissue assessment including brachialis muscle injury and biceps tendon status. MRI is the definitive study for identifying osteochondral injuries of the capitellum or trochlea that produce persistent post-fracture symptoms.

Non-Operative Treatment

Non-operative treatment is appropriate for: Mason Type I radial head fractures (collar and cuff for comfort, early range of motion at 1–2 weeks); Mayo Type I undisplaced olecranon fractures (posterior splint at 60–90 degrees for 3–4 weeks if triceps mechanism intact); Regan-Morrey Type I coronoid tip fractures in stable elbows; and minimally displaced distal humerus fractures in elderly patients with poor bone quality where total elbow arthroplasty may be preferable to attempted ORIF. Even non-operatively managed elbow fractures consistently develop some degree of post-traumatic stiffness, particularly loss of terminal extension, and satisfy §5102(d) through the fracture per se category and commonly through the significant limitation of use category.

Surgical Treatment

Radial head ORIF (Herbert screws): For Mason Type II fractures with articular step-off greater than 2 mm or mechanical block to rotation. The small size of the radial head and the need to avoid placing fixation in the anterolateral safe zone (the portion of the radial head that articulates with the proximal radioulnar joint during rotation) makes this technically demanding. Implant failure from screw penetration into the safe zone or cartilage is a recognized complication requiring revision.

Radial head replacement: For Mason Type III comminuted fractures and Essex-Lopresti lesions. Modular metal prostheses restore elbow and forearm stability by replacing the radial head's role as a secondary stabilizer against valgus and axial loads. Prosthesis oversizing (overstuffing) is a complication that causes radiocapitellar overloading and capitellum erosion; undersizing causes residual instability.

Olecranon ORIF: Tension band wiring is the traditional technique for simple transverse fractures, converting distraction forces from triceps pull into compression at the fracture site; it requires a second surgery for hardware removal in up to 80% of patients due to wire migration and skin irritation. Posterior plate-and-screw fixation is the modern preferred technique for comminuted and oblique fractures, with lower hardware removal rates.

Distal humerus ORIF (dual-column plating): Two pre-contoured anatomic plates applied on the medial and lateral columns at approximately 90 degrees, providing the biomechanical stability needed for early motion and preventing the stiffness that is the primary cause of poor functional outcomes. A "triceps-on" (triceps-splitting or triceps-reflecting) approach preserves the extensor mechanism; olecranon osteotomy provides optimal articular visualization for severely comminuted Type C fractures.

Terrible triad reconstruction: Sequential repair — (1) coronoid fixation (suture lasso or screw), (2) radial head ORIF or replacement, (3) LUCL repair with suture anchors or reconstruction with palmaris tendon graft, (4) fluoroscopic stability assessment under dynamic testing, (5) hinged external fixator application if residual instability. UCL repair is performed medially if residual valgus instability exists after lateral reconstruction.

Total elbow arthroplasty (TEA): For severely comminuted distal humerus fractures in elderly or low-demand patients where ORIF is not feasible, or as a salvage procedure for post-traumatic arthritis after failed ORIF. TEA permanently restricts lifting to less than 1 kg (approximately 2 lbs) for life — a catastrophic functional restriction for working-age patients and a major determinant of case value.

New York Insurance Law §5102(d) creates the serious injury threshold that governs whether an accident victim may sue for non-economic damages (pain and suffering, loss of enjoyment of life) beyond no-fault benefits. For elbow fractures, the two most directly applicable categories are:

Fracture per se: Any confirmed fracture — radial head, olecranon, distal humerus, coronoid, or lateral condyle — satisfies the serious injury threshold as a matter of law. The New York Court of Appeals confirmed in Oberly v. Bangs Ambulance Inc. (96 NY2d 295, 2001) that even a single fracture, however minor, satisfies the threshold. Emergency room X-ray or CT confirming the fracture, combined with documentation of the causal link to the car accident mechanism in the treating physician's records, establishes the threshold on summary judgment motion. An undisplaced Mason Type I radial head fracture identified only by the posterior fat pad sign on lateral X-ray — where no fracture line is visible but the joint effusion confirms an intra-articular fracture — qualifies as a fracture per se.

Permanent consequential limitation of use: Goniometric measurement of permanent elbow motion deficits satisfies this category. Normal elbow values for comparison are: flexion 145 degrees, extension 0 degrees, pronation 85 degrees, supination 90 degrees. A permanent extension deficit of 30–40 degrees (measured at maximum medical improvement, typically 12–18 months post-surgery), restriction of forearm pronation below 50 degrees, or loss of supination below 45 degrees constitute permanent consequential limitation. The deficit must be documented with objective measurements at maximum medical improvement, not self-reported symptoms alone. Post-traumatic elbow arthritis documented on imaging (joint space narrowing, osteophytes) provides independent objective evidence of permanent consequential limitation.

Significant limitation of use: Independently satisfied by significant elbow stiffness documented at maximum medical improvement even without absolute quantification meeting permanency thresholds. Residual elbow instability on examination after terrible triad reconstruction — positive pivot-shift or posterolateral rotatory instability test — constitutes significant limitation of use. Ulnar nerve palsy with documented intrinsic muscle weakness and positive Tinel's sign at the cubital tunnel satisfies both significant limitation and, if permanent, the permanent consequential limitation category.

Ulnar nerve palsy as an independent serious injury: Documented ulnar neuropathy — sensory loss in the ulnar nerve distribution (ring and little fingers) and intrinsic muscle weakness, confirmed on EMG/NCS — constitutes an independent serious injury separate from the fracture itself. In cases involving both an elbow fracture and ulnar nerve palsy, both injuries should be separately pleaded as serious injuries, as each independently establishes the threshold and each contributes independently to the damages calculation.

GML §50-e Notice of Claim: If the at-fault vehicle was operated by a government entity — MTA bus, municipal vehicle, school bus, sanitation truck, police vehicle, fire department vehicle — a Notice of Claim under General Municipal Law §50-e must be filed within 90 days of the accident date. Failure to file timely bars the claim against the government entity regardless of how severe the elbow injuries are. Application for leave to file a late notice of claim is available under GML §50-e(5) but requires showing a reasonable excuse for the delay and absence of substantial prejudice to the government.

High-value factors in elbow fracture litigation: Terrible triad requiring complex surgical reconstruction (coronoid repair + radial head replacement + LUCL reconstruction); total elbow arthroplasty with permanent 1 kg lifting restriction; persistent ulnar neuropathy requiring anterior nerve transposition; heterotopic ossification requiring surgical excision and radiation therapy; radioulnar synostosis causing complete loss of forearm rotation; occupation requiring full elbow and forearm rotation (licensed electricians, plumbers, carpenters, mechanics, surgeons, musicians, professional athletes); and young plaintiffs with documented earning capacity loss from a vocational expert. Under New York’s pure comparative negligence doctrine (CPLR §1411), even a plaintiff found partially at fault — for example, 20% at fault for not wearing a seatbelt — recovers 80% of the total damages, so even disputed-liability cases with severe elbow injuries have significant value.

If you sustained a broken elbow in a Long Island car accident, see our Long Island car accident lawyer page for a full overview of the claims process, no-fault benefits, and how to pursue your case from first consultation through trial.