Scaphocapitate Arthrodesis for Wrist Deformities: A Systematic Review.

BACKGROUND

Scaphocapitate arthrodesis (SCA) is a described technique for chronic wrist pathology such as Kienbock disease and carpal instability. The technique aims to preserve motion, while maintaining carpal height, preserving the radioscaphoid articulation, and offloading the lunate. Limited case series evaluate the outcomes of this previously described technique. We aim to determine if the collective, updated literature on outcomes of SCA support its continued application by the wrist surgeon. Furthermore, we investigated if any technical variations offer an advantage in improving patient-reported outcomes after SCA.

METHODS

A literature search was performed using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Articles selected for critical review were examined for patient demographic data, functional outcomes, radiographic outcomes, and complications. A qualitative analysis was then performed to synthesize the available date.

RESULTS

A total of 18 unique articles published between 1991 and 2022 were identified, representing a total of 285 individual cases of SCA. Nonunion rate ranged 0%-22%. Preoperative visual analog scale pain scores ranged from 3.2 to 10, whereas postoperative visual analog scale pain scores ranged from 0 to 4. Patient-reported outcomes are reported by validated instruments, including the Disabilities of the Arm, Shoulder, and Hand, QuickDASH, Patient-rated Wrist Evaluation, and Mayo Wrist Score.

CONCLUSIONS

SCA is a viable treatment option for patients with Kienbock disease. SCA offers reliable improvements in patient pain, grip strength, and patient-reported outcomes.