Transverse Carpal Ligament and Forearm Fascia Release for the Treatment of Carpal Tunnel Syndrome Change the Entrance Angle of Flexor Tendons to the A1 Pulley: The Relationship between Carpal Tunnel Surgery and Trigger Finger Occurence

Table 1

The entrance angles of tendons of all digits to A1 pulley according to the procedure.

	Thumb	Index	Middle	Ring	Little
Procedure 1	10°	4°	8°	12°	8°
Procedure 2	20°	16°	35°	24°	11°
Procedure 3	28°	20°	39°	33°	14°

Procedure 1: intact TCL and FF, Procedure 2: only the TCL incised, and Procedure 3: both TCL and FF incised. IF: index finger, MF: middle finger, RF: ring finger, and LF: little finger.