The Effect of the Dorsal Intercarpal Ligament on Lunate Extension After Distal Scaphoid Excision

Distal Pole Resection of the Scaphoid for the Treatment of Scaphotrapeziotrapezoid Osteoarthritis

“…Shortening the scaphoid causes an alteration of this alignment due to bony geometry changes of the STT joint, resulting in a rotation of the whole proximal row into an abnormal extension. 6,7,10 In our retrospective study, a DISI deformity was seen in 13 wrists with an average LC angle of 22° (range, 0°-44°) postoperatively. Most interestingly, most of the contralateral wrists in our series, with or without STT-OA, did not display a DISI stance.…”

“…Patient-reported outcomes were evaluated using a visual analog scale (VAS) for pain, usability, and independence and with the Quick Disabilities of the Arm, Shoulder, and Hand Dutch Language Version (Q-DASH-DLV) and the Michigan Hand Questionnaire (MHQ), Dutch version. In the evaluation of pain, usability, and independence, the VAS ranged from no pain (0) to worst imaginable pain (10), from maximal usability (0) to unusable (10), and from maximal independence (0) to maximal dependence (10), respectively. For all these measures, patients were asked to report their condition during the week prior to their visit to the outpatient clinic.…”

Functional kinematics of the wrist

“…Carpal bone motion was then tracked as the tendons were loaded. In the Kamal study, dynamic DISI occurred after the distal scaphoid was excised (Kamal et al, 2012a). This indicated that the trapezium and trapezoid apply a flexion moment to the scaphoid, which, when withdrawn, allows lunate extension under load.…”

Subject-Specific Carpal Ligament Elongation in Extreme Positions, Grip, and the Dart Thrower's Motion

“…Our results suggest that the DIC may function to stabilize the radiocarpal and midcarpal joints during grip and through the DTM. We have also recently shown that the DIC ligament serves to support the midcarpal joint and the lunate from increased lunate extension after distal scaphoid excision [40]. While both the DRC and DIC remained elongated during wrist flexion, which includes motion of both the radiocarpal and midcarpal joints, only the DIC remained elongated during the DTM, where motion predominantly occurs at the Fig.…”