A 25-year-old man is brought to the emergency department after falling down a staircase and landing on his outstretched hand. X-ray studies show a perilunate dislocation. The scapholunate and which of the following ligaments must be ruptured for this dislocation to occur? 

A 63-year-old man comes to the office because of pain of the right wrist and posttraumatic arthritis after a long-standing scapholunate tear that was untreated. Salvage reconstruction with proximal row carpectomy is planned. Which of the following articular surfaces should be intact in order to perform the procedure?  

A 40-year-old woman is evaluated in the emergency department after she fell on her outstretched hand while playing tennis. Examination shows tenderness of the wrist. After the scaphoid, which of the following carpal bones is most likely fractured in this patient? 

An active 73-year-old woman comes to the office because of Eaton Stage IV arthritis of the carpometacarpal joint of the dominant thumb (pantrapezial arthritis with carpometacarpal [CMC] joint subluxation). She says she has severe pain when she tries to grip something, such as open a door or twist off the top of a jar. Which of the following is the most predictable procedure to decrease pain and improve hand function in this patient?