Behaviour of a biocompatible titanium alloy during orthogonal micro-cutting employing green machining techniques

The sustainability of a process is the objective of modern industries aiming to reduce waste in production, since consumers require high quality and efficiency with fair price. Thus, a good understanding of the process should be its starting point. The manufacture of dental implants is an example in which waste reduction is important for the reduction of prices due to the demand for great quality and accuracy. This study observed the behaviour of sustainable micro-cutting applied to the Ti-6Al-7Nb titanium alloy, considering the ploughing effect on minimum quantity lubrication (MQL) and high-speed machining (HSM) conditions. When compared with dry condition and low-speed cutting in orthogonal micro-cutting, the use of HSM in dry cutting was more efficient than using MQL. The dry condition presented lower surface roughness, whilst the cooled/lubricated condition presented lower burr formation.publishe

Encapsulating Peritoneal Sclerosis Presenting after Two Donor Kidney Transplantations: A Case Report and Literature Review

Encapsulating peritoneal sclerosis is a rare, recurring complication in peritoneal dialysis (PD) patients. With a mortality rate of 51%, it continues to be a therapeutic enigma among clinicians. However, the incidence after kidney transplantation (KT) has rarely been reported. We report a unique case of encapsulating peritoneal sclerosis (EPS), occurring years after failed initial living KT, and diagnosed after second deceased donor kidney transplantation. A 35-year-old male, on prior PD for 4 years, followed by failed KT of 8 years, was presented with abdominal pain, weight loss, and vomiting, 7 months after his second deceased donor KT. An abdominal computed tomography showed intra-abdominal loculated fluid collection, but no obstruction. Exploratory laparotomy revealed extensive peritoneal thickening and blocked intestinal loops. Histopathology was indicative of EPS with fibrous adhesions and sclerotic tissues. Besides restarting his immunosuppressive medications, tamoxifen therapy was initiated as definitive medical management. Currently, he is in clinical remission, follows at transplant clinic, and still experiences episodes of small bowel obstruction. Though the incidence of EPS after KT has been observed sporadically worldwide, none has been reported in the USA. Despite its prevalence in PD patients, therapeutic interventions attempted so far, are not definitive

Transplantation of Renal Allograft After Removal of Renal Cell Carcinoma: Case Report and Review of the Literature

With the rising incidence of end-stage renal disease in the United States, patients needing renal transplants are waiting longer for increasingly scarce grafts. Formerly, the general practice was to avoid organs with tumors for transplant because of the risk of malignancy transmission to the recipient. However, with comprehensive donor selection and a small-sized primary tumor, the positive outcomes of transplant outweigh the risks of transmission after a partial nephrectomy. In our case, a 31-year-old woman, the daughter of the recipient, underwent a laparoscopic nephrectomy with an existing 8-mm tumor later confirmed as renal cell carcinoma. An ex vivo tumor enucleation was performed before the allograft was transplanted into the 69-year-old patient with endstage renal disease. At last follow-up, graft function has remained excellent with no evidence of local recurrence or metastasis in both the donor and recipient. Here, we describe our case and perform a literature review on the incidence and management of renal allografts with incidentally detected renal cell carcinoma during transplant