introduction: perforations of the pulpal floor create problems during endodontic treatment and often results in secondary periodontal involvement with eventual loss of teeth. the purpose of this study was to evaluate the ability of mineral trioxide aggregate (mta), amalgam, zinc oxide and eugenol (zoe) and portland cement to seal furcal perforations in extracted human molars using dye penetrati...

BACKGROUND Duodenal ulcer perforations are a common surgical emergency, but literature is silent on the exact definition, incidence, management and complications of large perforations of duodenal ulcers. METHODS The case files of 162 patients who underwent emergency laparotomy for duodenal ulcer perforations over a period of three years (2001 - 2003) were retrospectively reviewed and sorted i...

A 73-year-old woman with a transtracheal oxygen catheter in place developed sudden onset of respiratory distress and subcutaneous emphysema. Bronchoscopy revealed the presence of three posterior tracheal wall perforations and a blind pouch arising from one of the perforations. Subsequent bronchoscopies revealed complete healing of the perforations. We believe that these perforations occurred du...

OBJECTIVE This study aimed to determine how tympanic membrane (TM) perforations and their closure, using a paper-patch technique, affect middle-ear mechanics and, thus, conductive hearing for different sizes of the TM perforation. STUDY DESIGN Temporal bone (TB) study and prospective clinical trial. SETTING Tertiary referral center. PATIENTS Nine patients with chronic otitis media for mor...

BACKGROUND AND STUDY AIMS Many medical institutions in Japan perform endoscopic mucosal dissection (ESD) to treat early gastric cancer. Perforations can occur during ESD, and clipping has been reported as useful for treating small pinhole perforations. However, it is often difficult to close postoperative perforations because they usually have large diameters, and the muscle layer around the pe...