Does the bile duct angulation affect recurrence of choledocholithiasis?

Figure 1 Cholangiographic configuration of (A) usual extrahepatic bile duct and (B) deformed bile duct. The imaginary line was drawn along the center of the bile duct and each internal angle was measured at the angulation of the proximal (a) and distal (b) bile duct level respectively. The values of both angles were added together (a + b).