Three-dimensional printed, proximal phalangeal prosthesis with metatarsophalangeal joint arthroplasty for the treatment of a giant cell tumor of the fifth toe: The first case report

Abstract

Highlights Customized, single-piece, 3D-printed, titanium phalangeal prosthesis of the 5th toe. Replacement of whole proximal phalanx with a mobile joint distally and proximally. Patient walks with full weight-bearing, no pain, and no recurrence or metastasis. Overriding toe occurred after two years due to scar contracture. Prosthesis design development, including size reduction, may improve outcomes.

Enlarged accessory spleen after splenectomy mimicking a pancreas tumor

“…The patient was lost to follow-up later. This case was reported in line with the SCARE 2020 criteria [ 5 ].

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Complex geometry and integrated macro-porosity: Clinical applications of electron beam melting to fabricate bespoke bone-anchored implants

“…Despite initially satisfactory clinical outcomes (including normal weight bearing of the fifth metatarsal head), a dorsiflexion contracture of the toe developed after 8 months and progressed to a full-fixed, overriding toe deformity by 18-24 months ( Fig. 12 a-e) [107] . Total talar replacement following avascular necrosis allows preservation of tibiotalar articulation.…”

“…Fifth toe [107] Implant displacement or subsidence Related to incorrect implant positioning or mismatch between implant geometry and anatomy…”

Three-dimensional technologies used for patient specific applications in orthopedics

“…Customized 3D printed implants are mainly used in reconstructive surgery [47,48] and orthopedic oncology [49,50] because their shape matches excised bone, thus lowering stresses on the existing bone compared to conventional implants.…”

“…In a case of a patient with grade 2 calcaneus chondrosarcoma, Imanishi and Choong [49] performed a total calcanectomy by replacing the calcaneus with a customized patient calcanian prosthesis which was 3D printed in titanium. In a research of Chandhanayingyong et al [50], a patient who had a destructive lesion of the toe 5 proximal phalanx with invasion of the metatarsophalangeal joints and was diagnosed with giant bone cell tumor grade 1 underwent a block resection of the proximal phalanx. The defect was reconstructed with a proximal phalanx endoprosthesis as a metatarsophalangeal joint extension, which was 3D printed in titanium.…”