In hip arthroplasty, preoperative planning is fundamental to reaching a successful surgery. Nowadays, several software tools for computed tomography (CT) image processing are available. However, research studies comparing segmentation tools for hip surgery planning for patients affected by osteoarthritic diseases or osteoporotic fractures are still lacking. The present work compares three different software from the geometric, dimensional, and usability perspectives to identify the best three-dimensional (3D) modelling tool for the reconstruction of pathological femoral heads. Syngo.via Frontier (by Siemens Healthcare) is a medical image reading and post-processing software that allows low-skilled operators to produce prototypes. Materialise (by Mimics) is a commercial medical modelling software. 3D Slicer (by slicer.org) is an open-source development platform used in medical and biomedical fields. The 3D models reconstructed starting from the in vivo CT images of the pathological femoral head are compared with the geometries obtained from the laser scan of the in vitro bony specimens. The results show that Mimics and 3D Slicer are better for dimensional and geometric accuracy in the 3D reconstruction, while syngo.via Frontier is the easiest to use in the hospital setting.

Three-dimensional (3D) printing is prevailing in surgical planning of complex cases. The aim of this study is to describe the use of 3D printed models during the surgical planning for the treatment of four pediatric hip deformity cases. Moreover, pediatric pelvic deformities analyzed by 3D printed models have been object of a concise review. All treated patients were females, with an average age of 5 years old. Patients' dysplastic pelvises were 3D-printed in real scale using processed files from Computed Tomography (CT) or Magnetic Resonance Imaging (MRI). Data about 3D printing, surgery time, blood loss and fluoroscopy have been recorded. The Zanoli-Pemberton or Ganz-Paley osteotomies were performed on the four 3D printed models, then the real surgery was performed in the operating room. Time and costs to produce 3D printed models were respectively on average 17:26 h and 34.66 €. The surgical duration took about 87.5 min while the blood loss average was 1.9 ml/dl. Fluoroscopy time was 21 sec. MRI model resulted inaccurate and more difficult to produce. 10 papers have been selected for the concise literature review. 3D printed models have proved themselves useful in the reduction of surgery time, blood loss and ionizing radiation, as well as they have improved surgical outcomes. 3D printed model is a valid tool to deepen the complex anatomy and orientate surgical choices by allowing surgeons to carefully plan the surgery.

Complex elbow injuries (CEIs) are severe and rare lesions, difficult to treat correctly due to the different patterns of clinical presentations. Standard methods cannot often be applied. The main goals of the treatment are performing a stable osteosynthesis of all fractures, obtaining a concentric and stable reduction of the elbow by repairing the soft tissue constraint lesions, and allowing early motion. Since the introduction of virtual reality (VR) approaches in clinical practice, three-dimensional (3D) computed tomography (CT) and 3D printing have revolutionised orthopaedic surgeries, thus helping to understand the anatomy and the pathology of complex cases. We discussed a case of CEI, characterised by an extended soft tissue (IIIB Gustilo classification) and neurovascular lesions associated with bone loss in a young female patient. Olecranon fracture was type IIIB according to Mayo classification. We outlined the steps of a pluri-tissue reconstructive approach and stressed the importance of 3D printing in the preoperative planning for such cases. Finally, peculiar final functional patient outcomes were reported. In this case, we found out that triceps reinsertion and scar process may provide for the joint stability in a low-demanding patient. 3D printing and VR approaches in clinical practice can be useful in the management of CEIs associated with an important bone and soft tissue loss. Facco G, Politano R, Marchesini A, et al. A Peculiar Case of Open Complex Elbow Injury with Critical Bone Loss, Triceps Reinsertion, and Scar Tissue might Provide for Elbow Stability? Strategies Trauma Limb Reconstr 2021;16(1):53–59.

Children displaced distal radius fractures (DRFs) are commonly treated by reduction. Yet, their excellent remodeling ability provides good clinical-radiographic outcomes even in case of non-anatomical reduction. The reduction under analgesia or sedation involves hospitalizations, greater risks, and higher hospital costs. The aim of this preliminary study is to demonstrate the accountability and conveniency of non-anatomical reduction. The study involved all 0-8 years-old children who were affected by a closed overriding DRF from February 2017 to December 2018 and were managed non-operatively by a long arm cast without reduction, analgesia, or sedation treatments. We retrospectively evaluated their clinical-radiographic outcomes and healing time. The costs of no-reduction treatments were compared with those of the two main approaches to DRFs, that is: closed reduction under sedation and application of a long arm cast; closed reduction under anesthesia, percutaneous pinning, and application of a long arm cast. The comparison was based on the Diagnosis Related Group system. We treated 11 children with an average initial radial shortening of 5±3 mm and average initial sagittal and coronal angulations of 4.0° and 3.5°, respectively. Average casting duration was 40 days. All patients achieved a full range of wrist motion without deformities. The procedure was respectively 7 times less expensive than closed reduction in emergency room under sedation and application of a long arm cast, and 64 times less expensive than closed reduction in the operating room under anesthesia, percutaneous pinning, and application of a long arm cast. In children aged 0-8 years, non-operative treatment of closed overriding DRFs with a long arm cast without reduction is a simple and cost-effective procedure with both clinical and radiographic medium-term excellent outcomes.

Article: Pubo-femoral distance in selective ultrasound screening of developmental dysplasia of the hip - Minerva Pediatrics 2023 Jan 30 - Minerva Medica - Journals