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Orthopaedic Wiki

Hawkins Classification — Talar Neck

I: no dislocation; II: subtalar dislocation; III: subtalar + tibiotalar; IV: plus talonavicular. AVN risk escalates I→IV; displaced types require urgent reduction and fixation.

Trauma | 👁 5 | 2 weeks ago

Hardcastle–Myerson — Lisfranc Injuries

A: total incongruity; B1: medial partial; B2: lateral partial; C1: divergent partial; C2: divergent complete. Any >2 mm displacement typically requires surgical fixation/arthrodesi...

Trauma | 👁 4 | 2 weeks ago

5th Metatarsal Base — Zones (Pseudo-Jones/Jones/Stress)

Zone I: tuberosity avulsion (pseudo-Jones) — usually heals conservatively. Zone II: Jones fracture at metaphyseal–diaphyseal junction — watershed area, higher nonunion → screw fixa...

Trauma | 👁 5 | 2 weeks ago

Tile Classification — Pelvic Ring Stability

A: stable (posterior arch intact). B: rotationally unstable, vertically stable (open-book APC or LC injuries). C: rotationally + vertically unstable (complete posterior disruption)...

Trauma | 👁 6 | 2 weeks ago

Patella — Pattern-Based (AO/OTA 34)

Transverse, comminuted (stellate), polar avulsion, vertical; AO: 34-A extra-articular pole, 34-C transverse/comminuted. Displacement/extensor disruption → ORIF; minimal displacemen...

Trauma | 👁 3 | 2 weeks ago

AO/OTA 42 — Tibial Shaft + Oestern–Tscherne & Gustilo

AO: 42-A simple, 42-B wedge, 42-C complex/segmental. Closed soft tissues graded by Oestern–Tscherne; open injuries by Gustilo (I–IIIC). Guides fixation strategy and antibiotics/cov...

Trauma | 👁 5 | 2 weeks ago

Danis–Weber Classification — Ankle (Fibula Level)

A: infra-syndesmotic; B: at syndesmosis; C: supra-syndesmotic (Maisonneuve possible). Instability rises from A→C; C requires ORIF with syndesmotic fixation.

Trauma | 👁 5 | 2 weeks ago

Lauge–Hansen Mechanism — Ankle

SA (supination-adduction): lat avulsion → vertical medial fx. SER (supination-external rotation): ATFL → fibula at level → posterior → medial (most common). PA (pronation-abduction...

Trauma | 👁 3 | 2 weeks ago

AO/OTA 33 — Distal Femur (Supracondylar)

33-A: extra-articular; 33-B: partial articular (e.g., Hoffa = B3); 33-C: complete articular. Articular types require anatomic joint reduction; fixation usually with locking plates...

Trauma | 👁 3 | 2 weeks ago

Schatzker Classification — Tibial Plateau

I split lateral; II split+depression; III pure depression; IV medial; V bicondylar; VI metaphyseal-diaphyseal dissociation. Severity ↑ from I→VI; medial/bicondylar often need dual...

Trauma | 👁 5 | 2 weeks ago

AO/OTA 41 — Proximal Tibia (Alternative to Schatzker)

41-A extra-articular; 41-B partial articular; 41-C complete articular. Complements/updates Schatzker with alphanumeric consistency across regions.

Trauma | 👁 4 | 2 weeks ago

Pauwels Classification — Femoral Neck (Shear Angle)

Type I: 50° (most vertical → highest shear). Higher angle = higher shear → instability, nonunion risk; stronger fixation needed.

Trauma | 👁 8 | 2 weeks ago