An Innovative Method to Analyse the Geometrical Accuracy of Ti6Al4V Octet-Truss Lattice Structures.

Metal lattice structures manufactured utilising additive techniques are attracting increasing attention thanks to the high structural efficiency they can offer. Although many studies exist on the characterisation of massive parts in Ti6Al4V processed by Electron Beam Melting (EBM), several investigations are necessary to characterise the Ti6Al4V lattice structures made by the EBM process. The objective of this paper is to develop a measurement method to assess the dimensional accuracy of Ti6Al4V octet truss lattice structures manufactured by EBM technology.

Hallux rigidus: current concepts review and treatment algorithm with special focus on interposition arthroplasty.

Background And Aim Of The Work: Hallux rigidus represents a surgical challenge, with a multitude of possible surgical options, but with no ideal procedures.  The propose of this paper was to review the actual knowledge on the operative techniques, paying particular attention to the evolution of interposition arthroplasties, as an alternative to arthrodesis and prosthesis in the advanced stages of the disease.

Methods: A comprehensive literature PubMed search was performed, and the actual literature regarding hallux rigidus was overviewed.

Quadriceps or patellar ligament reconstruction with artificial ligament after total knee replacement.

Background And Aim Of The Work: Ruptures of the quadriceps or patellar tendon after TKA implantation are a fearful and disabling complication. Direct reconstructions highlighted various problems, such as the decrease in extensor force, failure, need for prolonged post-operative immobilization. So augmentation techniques have been proposed with autologous tendons, allografts, artificial ligaments.

Interposition Arthroplasty in the Treatment of End-Stage Hallux Rigidus: A Systematic Review.

Purpose: Patients affected by moderate to severe hallux rigidus may opt for interposition arthroplasty to avoid the movement restrictions of arthrodesis and the complications related to prosthetic replacement. The propose of this article was to review the current literature about interposition arthroplasty to examine the overall outcomes and to evaluate the advantages and disadvantages of different types of technique, compared with more consolidated procedures.

Methods: A literature PubMed search was performed.

Anterior and antero-lateral mini-invasive approaches for primary total hip replacement.

Background And Aim Of The Work: the literature provides conflicting data regarding the various approaches for hip prosthetic surgery. This study analysed our case series on the anterior and anterolateral minimally invasive approaches, trying to define the indications, complications, the technical tips, the advantages and disadvantages.

Methods: from 2011 to 2019 we performed 1227 interventions of which 1020 had a regular follow-up, up to an average period of 5.

Dynamic Pulse Buckling of Composite Stanchions in the Sub-Cargo Floor Area of a Civil Regional Aircraft.

This work is focused on the investigation of the structural behavior of a composite floor beam, located in the cargo zone of a civil aircraft, subjected to cyclical low-frequency compressive loads with different amplitudes. In the first stage, the numerical models able to correctly simulate the investigated phenomenon have been defined. Different analyses have been performed, aimed to an exhaustive evaluation of the structural behavior of the test article.

Five Centimeters Morton's Neuroma in a 46-Year-Old Woman Affected by Macrodactily.

The present article described the case of a voluminous Morton's neuroma of the third intermetatarsal space in a patient affected by macrodactily. The case was unique because of its dimensions, the uncommon surgical approach which was needed for removal, the association with macrodactily of the fourth toe with Raynaud's phenomenon, and the postoperative defect in the intrinsic muscles. The patient was operated in February 2016 by transverse plantar approach.

Current concepts about treatment options of plantar fibromatosis: A systematic review of the literature.

Background: Plantar fibromatosis, or Ledderhose disease, is a benign and hyperproliferative disease of the plantar aponeurosis. There have been described different therapeutic options regarding plantar fibromatosis, both conservative and surgical. The aim of this review is to systematically analyze conservative and operative treatments of plantar fibromatosis described in literature, evaluating which procedure shows the highest success rate and best functional outcome.

Morton's interdigital neuroma of the foot: A literature review.

Morton's neuroma is one of the most common causes of metatarsalgia. Despite this, it remains little studied, as the diagnosis is clinical with no reliable instrumental diagnostics, and each study may deal with incorrect diagnosis or inappropriate treatment, which are difficult to verify. The present literature review crosses all key points, from diagnosis to surgical and nonoperative treatment, and recurrences.

Postarthroscopy Osteonecrosis of the Knee: Current Concepts.

Knee osteonecrosis is a severe disease rapidly leading to end-stage osteoarthritis, which was classified into three categories: spontaneous, secondary, and postarthroscopy. To understand postarthroscopy osteonecrosis of the knee, all the three types of knee osteonecrosis have to be deepened. This article reviewed spontaneous and secondary osteonecroses of the knee, with special focus upon postarthroscopy osteonecrosis, which is a rare form, affecting patients operated for arthroscopic knee surgery, most commonly for meniscectomy.

Cementless knee arthroplasty.

Total knee replacement is a common treatment for advanced knee osteoarthritis. The most common and widespread method is cemented arthroplasty. As in the prosthetic hip a gradual transition from cemented to uncemented fixation techniques occurred over time, increasing interest is growing also around cementless knee fixation, with the theoretical advantages of preserving the bone stock and obtaining a biological fixation avoiding cement fragmentation.

Foot overuse diseases in rock climbing: an epidemiologic study.

Background: Literature examining the incidence of foot diseases in rock climbing is limited to traumatic injuries. We examined a large sample of climbers, assessed the chronic diseases of the foot, and correlated them with foot morphology, shoe type, and type of climbing practiced.

Methods: Between May 1 and September 30, 2009, 144 climbers (mean age, 31.

Posterior ankle impingement.

Posterior ankle impingement is a common cause of chronic ankle pain and results from compression of bony or soft tissue structures during ankle plantar flexion. Bony impingement is most commonly related to an os trigonum or prominent trigonal process. Posteromedial soft tissue impingement generally arises from an inversion injury, with compression of the posterior tibiotalar ligament between the medial malleolus and talus.

Allograft salvage procedure in multiple-revision anterior cruciate ligament reconstruction.

Background: Multiple-revision anterior cruciate ligament (ACL) reconstructions represent a surgical challenge due to the presence of previous tunnels, hardware, injuries to the secondary stabilizers, and difficulties in retrieving autologous tendons. An anatomic ACL reconstruction may therefore result in a demanding surgery, thus requiring 2 stages.

Purpose: To analyze the efficacy of an over-the-top ACL reconstruction technique plus extra-articular plasty using Achilles or tibialis posterior tendon allograft in restoring knee stability in patients with at least 2 failed previous ACL reconstructions, as well as to evaluate the factors able to affect the final outcome.

Bipolar fresh osteochondral allograft of the ankle.

Background: Severe post-traumatic ankle arthritis poses a reconstructive challenge in the young and active patient. Bipolar fresh osteochondral allograft (BFOA) may represent an intriguing alternative to arthrodesis and prosthetic replacement. The aim of this study was to describe a lateral trans-malleolar technique for BFOA, and to evaluate the results in a case series.

Foot and lower limb diseases in runners: assessment of risk factors.

The present study analyzed the impact of the running style and the morphologic and functional characteristics of the foot on the incidence of non-traumatic foot and lower limb disorders in runners. From January 2004 to December 2008, we prospectively examined 166 runners, both recreational and competitive, involved in various running specialities, from three athletics clubs in Northern Italy. They were 86 males and 80 females, with a mean age of 31.

Arthroscopic autologous chondrocyte implantation in osteochondral lesions of the talus: surgical technique and results.

Background: Autologous chondrocyte implantation (ACI) in the ankle was considered up to now an extremely technically demanding surgery with considerable morbidity for the patients.

Hypothesis: Hyalograft C scaffold allows arthroscopic ACI, thanks to a specifically designed instrumentation.

Study Design: Case series; Level of evidence, 4.

Effects of freezing on the biomechanical and structural properties of human posterior tibial tendons.

This work analyzes the effects of storage by fresh-freezing at -80 degrees C on the histological, structural and biomechanical properties of the human posterior tibial tendon (PTT), used for ACL reconstruction. Twenty-two PTTs were harvested from eleven donors. For each donor one tendon was frozen at -80 degrees C and thawed in physiological solution at 37 degrees C, and the other was tested without freezing (control).

Augmentation technique with semitendinosus and gracilis tendons in chronic partial lesions of the ACL: clinical and arthrometric analysis.

Most of the techniques described in the literature for the repair of chronic partial ACL tears, don't spare the intact portion of the ligament. The aim of this study was to perform a prospective analysis of the results of augmentation surgery using gracilis and semitendinosus tendons to treat partial sub-acute lesions of the ACL. This technique involves an "over the top" femoral passage, which enables salvage and strengthening of the intact portion of the ACL.