Fig. 15.1
(a, b, c) X-rays of scaphoid nonunion, with central bone loss and adaptative DISI. (Published with kind permission of © Christophe Mathoulin and Mathilde Gras, 2015. All Rights Reserved)
Management Chosen
It was decided to treat this patient with a vascularized bone graft utilizing a volar pedicled graft based off the volar carpal artery. The patient was informed that smoking was not allowed before and after surgery .
Surgical Procedure
The surgery was performed under regional anesthesia as an outpatient procedure through a single volar incision.
First Step: Exploration and Preparation of the Nonunion
The classic volar Henry approach was extended distally toward the distal scaphoid tubercle and the capsule was opened (Fig. 15.2). The two ends of scaphoid were cleaned and any fibrosis excised. The scaphoid showed a humpback deformity. Reduction was performed with an osteotome and fixed with temporary K-wires.
Fig. 15.2
Drawing showing the volar lateral approach for scaphoid. (Published with kind permission of © Christophe Mathoulin and Mathilde Gras, 2015. All Rights Reserved)
Second Step: Graft Harvesting
The graft was harvested from the distal and ulnar aspects of the volar radius. The volar carpal artery is always located in the volar periosteum of the radius, just distal to the distal part of the superficial aponeurosis of the pronator quadratus. The superficial aponeurosis was opened over its last distal centimeter; the muscle was retracted and then temporarily fixed with a K-wire. The periosteum was sectioned longitudinally on the distal edge of the radius where the superficial aponeurosis of the pronator quadratus ends on the radius. The pedicle was elevated with the periosteum on the radial side (Fig. 15.3). The structural bone graft was harvested from the radius with an osteotome and shaped as a pyramid to fit perfectly in the scaphoid defect and to avoid any detachment of the periosteum and pedicle from the graft (Fig. 15.4). The pedicle was dissected up to the radial artery, where the volar carpal artery originates (Fig. 15.5).
Fig. 15.3
Drawing showing the pedicle elevated with the periosteum on the radial side. (Published with kind permission of © Christophe Mathoulin and Mathilde Gras, 2015. All Rights Reserved)
Fig. 15.4
Drawing showing the harvesting of bone graft from the radius with an osteotome. (Published with kind permission of © Christophe Mathoulin and Mathilde Gras, 2015. All Rights Reserved)
Fig. 15.5
Drawing showing the pedicle dissected up to the radial artery, where the volar carpal artery originates. (Published with kind permission of © Christophe Mathoulin and Mathilde Gras, 2015. All Rights Reserved)