OBJECTIVE The aim of this retrospective study was to determine the root and canal morphology of the mandibular first and second permanent molars in a Turkish population using cone-beam computed tomography (CBCT). MATERIALS AND METHODS CBCT images of mandibular first (n = 966) and second molar (n = 1165) teeth from 850 Turkish patients were evaluated. The root canal configurations were classif...

do different types of malformations occur at different levels? The multiple canal theory is not a reasonable and satisfactory enough option to explain the development of such a malformation. Although the cellular mechanisms responsible for such a theory are not fully known, experimentally induced perturbations of Hensen’s node and the primitive streak during gastrulation have resulted in embryo...

statement of problem: root canal cleaning and elimination of the source of infection are the most important basis and the main requirements for successful root treatment since the main cause of failure in root treatment is the permeation of bacteria or their products into the periapical tissues. nowadays, the newly designed and prcsented instruments for canal instrumentation can improve root tr...

background: root morphology is of utmost importance to endodontic sciences. since there are a few studies on the morphology of mandibular second molars’ roots, and some anatomical variables are not evaluated before, the aim of this study was to investigate thoroughly radicular anatomy of this tooth. materials and methods: this ex vivo study was performed on 150 intact mandibular second molars. ...

OBJECTIVES The aim of this study was to determine the relation between the percent of canal compromise and success rate of epidural steroid injection (ESI) in patients with symptomatic lumbar herniated intervertebral discs. METHODS Patients with lumbar herniated intervertebral disc suffering from leg pain and treated with ESI were selected. The axial magnetic resonance (MR) image showing the ...

OBJECTIVE To evaluate the histopathologic changes of dark, transitional, and hair cells of the vestibular system in human temporal bones from patients with chronic otitis media. STUDY DESIGN Comparative human temporal bone study. SETTING Otopathology laboratory. SUBJECTS AND METHODS To compare the density of vestibular dark, transitional, and hair cells in temporal bones with and without ...

Background Schwannomas of the vidian canal are an extremely rare type of intracranial tumor that can have variable clinical presentations including headache, facial pain, facial muscle paralysis, decreased lacrimation, or nasal dryness. We present an atypical case of an incidentally identified asymptomatic vidian canal schwannoma. Case Description A 49-year-old woman with a history of multiple ...

Type C complete atrioventricular canal associated with tetralogy of Fallot in a 5-year old child was successfully corrected. Repair of the atrioventricular canal was combined with infundibular resection and the insertion of an outflow tract patch across the pulmonary valve ring. The postoperative course was uneventful, and the child is well one year after operation.