The incidence of iatrogenic colonic perforations in the medical literature ranges between 0.005% and 0.63% with the majority of patients requiring laparotomy for repair. Colonoscopic perforation may occur due to several mechanisms: blunt trauma to the colonic wall, barotrauma from air insufflation, unintentional endoscopic resection or excessive thermal injury. Our clinical experience includes ...

introduction: this study was carried out to evaluate the technical quality of root canal treatment (rct) performed by undergraduate dental students at the islamic azad university in tehran, iran. materials and methods: four-hundred records of patients who had received rct at faculty of dentistry, between the years 2004-2006 were evaluated. for each treated tooth at least three periapical x-rays...

BACKGROUND/AIMS Ultrastructural alterations in the stroma adjacent to corneal perforations have previously been reported in patients with longstanding rheumatoid arthritis. Since patients with rheumatoid arthritis often present upregulation of proinflammatory cytokines in serum and in synovial fluid, it was of interest to analyse the gene expression of these cytokines-for example, tumour necros...

In our otological practice, we prefer sliced tragal cartilageperichondrium grafting for reconstruction of the tympanic membrane perforations. In an attempt to reduce residual and recurrent perforations in our series of cartilage tympanoplasty using sliced tragal cartilage perichondrium composite graft, we reinforce tragal cartilage with temporalis fascia in large perforations. Aim: The purpose ...

The aim of this study is to evaluate the microleakage of repair materials MTA, IRM, and Biodentine applied on furcal perforations with different diameters. One hundred and forty extracted human teeth were used in this study. The teeth were divided into 2 main groups (60 teeth in each) which were then divided into 3 subgroups (n = 20). The remaining 20 teeth were divided into 2 groups (10 in eac...