274WPI ratings for abnormal motion or ankylosis of digits are combined with those for sensory losses in the same digits.

274     WPI ratings for abnormal motion or ankylosis of digits are combined with those for sensory losses in the same digits.

9.8.1   Abnormal motion of digits

275     The following tables assess impairments to range of motion of the digits of the hand, including ankylosis of one or more joints:

a)      Table 9.8.1a: Abnormal motion/ankylosis of the thumb – IP and MP joints;

b)      Table 9.8.1b: Radial abduction/adduction/opposition of the thumb – abnormal motion/ankylosis;

c)       Table 9.8.1c: Abnormal motion/ankylosis of the fingers – index and middle fingers; and

d)      Table 9.8.1d: Abnormal motion/ankylosis of the fingers – ring and little fingers.

276     Impairment values for flexion and extension losses in each individual joint are added to obtain the total WPI rating for loss of range of motion of that joint.

277     Where there is abnormal motion or ankylosis of more than one joint of the same finger, the WPI ratings for abnormal motion or ankylosis are combined to obtain the WPI rating for that finger.

278     Where there is abnormal motion or ankylosis of more than one joint of the thumb, the WPI ratings for abnormal motion or ankylosis are added to obtain the WPI rating for the thumb.

Table 9.8.1a: Abnormal motion/ankylosis of the thumb – IP and MP joints

See notes to Table 9.8.1a for further information.

• Direction IP joint MP joint Direction
• Extension/ hyper-extension Ankylosis Loss of extension Loss of flexion Ankylosis Loss of extension Loss of flexion Extension/ hyper-extension
• %WPI %WPI %WPI %WPI %WPI %WPI
• 2 0 2 40°
• 30° 3 0 3 2 0 2 30°
• 20° 3 0 3 2 0 2 20°
• 10° 2 0 2 2 0 2 10°
• 0° 2 0 2 1 0 1 0°
• 10° 2 1 1 1 0 1 10°
• 20° 2 1 1 1 0 1 20°
• 30° 2 1 1 1 1 1 30°
• 40° 2 2 1 2 1 1 40°
• 50° 2 2 1 2 2 0 50°
• 60° 3 2 0 2 2 0 60°
• 70° 3 3 0
• 80° 3 3 0

Table 9.8.1b: Radial abduction/adduction/opposition of the thumb – abnormal motion/ankylosis

See notes to Table 9.8.1b for further information.

| 0 | Loss of less than 10° of radial adduction.<br>Loss of less than 35° of radial abduction.<br>Lack of less than 3cm adduction.<br>Thumb opposition of more than 6cm. | | 1 | Loss of 10°-20° of radial adduction.<br>Loss of 35°-40° of radial abduction.<br>Lack of 3-5cm adduction.<br>Thumb opposition of 5-6cm.<br>Ankylosis in 30°-35° of radial abduction. | | 2 | Loss of 25° or more of radial adduction.<br>Loss of 45° or more of radial abduction.<br>Lack of 6cm adduction.<br>Ankylosis in 15°-25°, or 40°-50° of radial abduction.<br>Ankylosis in 4cm of adduction.<br>Thumb opposition of 4cm. | | 3 | Lack of 7cm adduction.<br>Thumb opposition of 3cm.<br>Ankylosis in 3cm or 5cm of adduction. | | 4 | Lack of 8cm adduction.<br>Ankylosis in 0-2cm or 6-8cm of adduction. | | 5 | Thumb opposition of 2cm.<br>Ankylosis in thumb opposition of 5-6cm. | | 6 | Ankylosis in thumb opposition of 4cm or 7cm. | | 7 | Thumb opposition of 1cm.<br>Ankylosis in thumb opposition of 3cm or 8cm. | | 8 | Ankylosis in thumb opposition of 1 or 2cm. | | 10 | Thumb opposition of 0cm.<br>Ankylosis in thumb opposition of 0cm. |