Journal of Musculoskeletal Trauma

Fixation with two headless compression screws and a distal-radius bone graft for proximal scaphoid nonunion with dorsal intercalated segment instability deformity: a report of three cases: Seonjeong Lee, Won Sun Lee, Jae Kwang Kim; J Musculoskelet Trauma 2026;39(3):252-261. Published online July 7, 2026; DOI: https://doi.org/10.12671/jmt.2026.00136

Abstract PDF: Proximal scaphoid nonunion is difficult to treat because the proximal fragment is small and biologically compromised. Secure fixation can be especially challenging when dorsal intercalated segment instability (DISI) is present and requires correction. We report three male patients with proximal scaphoid nonunion and DISI deformity who underwent volar fixation with two 2.4-mm headless compression screws and cancellous bone graft harvested from the distal radius at the Lister tubercle. Preoperative computed tomography confirmed a proximal nonunion line and proximal fragment dimensions considered sufficient for dual-screw fixation, and magnetic resonance imaging showed no definite avascular necrosis. Early postoperative computed tomography showed maintained fixation and alignment in all three patients. Although CT-confirmed union at final follow-up was not uniformly available, radiographic union defined on plain radiographs was achieved in all cases without loss of alignment or carpal collapse. Carpal alignment improved in two patients, but DISI persisted in one. One patient underwent secondary removal of a preexisting loose body and one screw. This small case series suggests that dual-screw fixation with cancellous grafting may be technically feasible in selected proximal scaphoid nonunions with concomitant DISI. Level of evidence: V.

Treatment of Scaphoid Fractures and Nonunions: Wan-Sun Choi; J Korean Fract Soc 2022;35(4):182-189. Published online October 31, 2022; DOI: https://doi.org/10.12671/jkfs.2022.35.4.182

Abstract PDF: A scaphoid fracture is one of the most common types of wrist fractures, and if treatment is delayed, there is a high possibility of nonunion due to anatomical factors such as limited blood supply to the injured bone. Therefore, it is important to suspect a scaphoid fracture based on the mechanism of wrist injury and physical examination of the patient. A computed tomography scan or magnetic resonance imaging can also aid early diagnosis of the fracture. Stable acute fractures can be treated conservatively, but unstable fractures require surgical treatment, and percutaneous screw fixation is usually performed. Nonunions require bone grafts and are treated with non-vascularized bone grafts and screw fixation. However, if the nonunion is located at the proximal pole, a vascularized bone graft may be considered because there is a possibility of avascular necrosis. Pedicled vascularized and free vascularized medial femoral condyle bone grafts are mainly used in such cases. The treatment of a proximal pole nonunion with impaired blood flow remains controversial. There are conflicting opinions on whether a nonvascularized bone graft is sufficient or whether a vascularized bone graft is necessary.

Transscaphoidal Dorsal Perilunar Dislocation Associated with Dislocation of Distal Radioulnar Joint: A Case Report: Chul Hyung Kang, Chul Hyun Cho, Dong Wan Kim; J Korean Fract Soc 2014;27(1):77-81. Published online January 31, 2014; DOI: https://doi.org/10.12671/jkfs.2014.27.1.77

Abstract PDF: Dorsal perilunar dislocations are rare traumatic entities. Associated fractures such as carpal bones and radial styloid processes can occur. However, the dorsal perilunar dislocation associated with dislocation of distal radioulnar joint is extremely rare. The authors herein report the case of a 34-year-old man who was presented with transscaphoidal perilunar dislocation which is associated with dislocation of distal radioulnar joint.

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