In Monteggia fracture-dislocation, the BADO classification Type I involves anterior dislocation of the radial head with which pattern of ulna fracture?

• A Apex anterior (extension type) fracture of proximal ulna ✓
• B Apex posterior (flexion type) fracture of proximal ulna
• C Comminuted fracture of the ulna diaphysis
• D Fracture at the level of the distal ulna

Explanation

Bado Type I is the most common Monteggia variant (60–70%) and consists of anterior radial head dislocation with an apex-anterior (extension) fracture of the proximal ulna. The mechanism is forceful hyperpronation or direct blow on the dorsum of the forearm. Bado Type II has posterior radial head dislocation with apex-posterior ulna fracture; Type III has lateral dislocation with metaphyseal ulna fracture (common in children); Type IV includes radius fracture as well. In children, Type I is treated by closed reduction; adults often require ORIF of the ulna.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.