Improvement of surgical time and functional results after do-it-yourself 3D-printed model preoperative planning in acetabular defects Paprosky IIA-IIIB.

Introduction: The correct positioning of the implant in revision total hip arthroplasty (rTHA) is critical to obtaining substantial functional outcomes, and to avoiding complications. Current literature supports three-dimensional (3D)-printed models as potentially useful tools for preplanning, as well as the "do it yourself (DIY)" methodology to reduce both the time and costs of this procedure. However, no study has determined the efficacy of both methods combined in a cohort of patients with severe acetabular defects.

Technique tip: 3D printing surgical guide for pes cavus midfoot osteotomy.

Background: Pes cavus can be defined as an abnormal elevation of the longitudinal arches, which is often secondary to a muscle imbalance. This deformity affects the foot's three dimensions (3D) and our osteotomies are usually planned on a lateral (two-dimension) X-ray. Are we really considering all the spatial components of the deformity? The aim of this study is to present a technique tip to identify the apical plane of the pes cavus deformity and perform a midfoot dorsal-based wedge resection osteotomy by using customized 3D printed surgical guides.

Beaming in the Charcot foot: A case series with 12-month minimum follow-up.

Background: Charcot neuropathic arthropathy is a progressive degeneration of the weightbearing joints of the foot induced by denervation and disturbance of sensorial perception. This entity clinically behaves as a destructive fast-progressive arthropathy, resulting in loss of independent walking and often requiring amputation of the leg. This study analyzes our experience with midfoot realignment arthrodesis and stabilization by intramedullary beaming in patients with Charcot diabetic foot as a limb-sparing procedure.