This study evaluated in vitro the effect of using the operating microscope on repairing furcation perforations using Vitrebond or mineral trioxide aggregate. Forty-six human molar teeth were mounted into a jig attached to a simulated jaw. The teeth were allocated randomly to four groups (n = 10). Furcal perforations were made in the teeth using an ISO 012 round bur in a slow-speed hand-piece. E...

Boerhaave syndrome (BS) is a spontaneous esophageal perforation and is a life-threating but uncommon disorder. This syndrome involves a transmural perforation and typically occurs after forceful emesis. The prognosis is dependent on rapid diagnosis and correct management. The classic presentation of BS consists of vomiting, subcutaneous emphysema, and lower thoracic pain. However, significant s...

introduction: the aim of this study was to evaluate the accuracy of two electronic apex locators (smarpex and novapex) in detecting apical perforation. materials and methods: after access cavity preparations, the working length was determined by the first examiner before and after perforation with a stereomicroscope by introducing a k-file size 10 into the canal and size 25 k-file up to the per...

background: with respect to physical relations in force and pressure, we hypothesized that the prevalence of traumatic tympanic membrane perforation in patients with a patulous eustachian tube is greater than normal, because in eustachian tube patency, the internal air pressure of the middle ear will not increase after compression, subsequent to trauma. therefore the force upon the tympanic mem...

aluminum foams are a novel branch of advanced materials with superior properties. sandwich structures with aluminum foam core are good energy absorbers. in this paper, mechanical properties and energy absorption of aluminum foam sandwich panels subjected to quasi-static perforation tests with conical-nosed indenter were investigated experimentally. for this purpose sandwich panels consisting of...

nasogastric tube (ng) insertion is a usual technique in any neonatal intensive care unit. this procedure is undertaken for the children who are in need of invasive care. sometimes, the insertion of nasogastric tube in infants with esophagus friable anatomy tissues may have some dangerous side effect, but such problems are not very common. esophageal perforation is a rare but known complication ...

BACKGROUND Perforation of the colon occurring during or shortly following colonoscopy or barium enema is a rare complication of collagenous colitis (CC). "Spontaneous" perforation in CC, in which no instigating factor is identified, is even less common, with only five cases reported to date. We report herein an additional case of spontaneous perforation in previously undiagnosed CC and review t...

loon dilation is 0-14% (1-3). An esophageal perforation is classified into three types: a type I-intramural perforation; a type II-transmural perforation; and a type IIItransmural perforation with mediastinal leakage (4). Fasting, parenteral alimentation, and antibiotics are generally used to treat types-I and II esophageal perforations. However, a type III esophageal perforation showing progre...