Fig. 1Postoperative plain radiographs show that the proximal screw tips of fixed volar plate are protruded about 1-2 mm from the dorsal cortex of distal radius. The arrow marks the causative screw of ruptured extensor pollicis longus tendon.
Fig. 2Computerized tomographs show that any distal screws of fixed volar plate do not penetrate the dorsal cortex of distal radius, but the proximal screws are definitely protruded through the dorsal cortex. The middle one (arrow) is the most prominent screw in comparison of simple radiographs, measuring about 2.8 mm.
Fig. 3Preoperative ultrasonography shows protruding screw tips and discontinuity of extensor pollicis longus tendon at distal forearm region.
Fig. 4Intraoperative photographs show a complete rupture of extensor pollicis longus tendon, where the ends are torn and fraying at prominent proximal screw tip, measuring about 2.5 mm.