objective: oral lesions are among the important reasons for seeking dental care. being frequently encountered, giant cell lesions form an important group of oral lesions. the epidemiologic data on these lesions, however, is scarce in iran. the present study investigated epidemiological and demographic characteristics of giant cell lesions in oral biopsies done in one of the largest oral patholo...

aneurysmal bone cyst (abc) is an expansile bone lesion that usually involves the long bones. skull base involvement is rare. hereby, we describe a 17-year-old man with hoarseness, facial asymmetry, left sided sensorineural hearing loss and left jugular foramen syndrome. ct scan and mri showed a skull base mass that was confirmed as abc in histopathology. the case was unusual and interesting due...

the purpose of this study was to evaluate the efficacy of two types of bone substitutes, bio-oss and nuoss, for repair of bone defects.this study was performed on the calvaria of 14 new zealand rabbits. the 6mm critical size defect (csd) models of bone regeneration were used. three csds were created in each surgical site. the first defect was filled with nuoss, the second one with bio-oss and t...

In this paper, the depositional environment, age, and tectonic context of Sub-Himalayan Kuldana Formation are discussed in detail. To determine Formation’s setting, sedimentological, palaeontological, petrographic investigations have been conducted accordingly. The lithologically consists both siliciclastic carbonate rocks. Petrographically, sandstone is divided into litharenite feldspathic pet...

objective(s): the aim of this study was to observe the influence of phytoestrogen α-zearalanol on ovariectomy-induced postmenopausal osteoporosis in rats. materials and methods:40 sd female rats were randomly divided into four groups: sham group, ovx group (ovariectomized and fed estrogen), α-zearalanol group (ovariectomized and fed α-zearalanol) and untreated group (ovariectomized). three week...

Landslides inventories are crucial documents for extrapolating the spatial distribution of landslides that occurred in past. However, production landslide hazards maps also needs deepeni...

We have developed a new three-dimensional general relativistic magnetohydrodynamic (GRMHD) code, RAISHIN, using a conservative, high resolution shock-capturing scheme. The numerical fluxes are calculated using the Harten, Lax, & van Leer (HLL) approximate Riemann solver scheme. The fluxinterpolated, constrained transport scheme is used to maintain a divergence-free magnetic field. In order to e...

objective(s): bonenavi, a computer-aided diagnostic system, is used in bone scintigraphy. this system provides the artificial neural network (ann) and bone scan index (bsi) values. ann is associated with the possibility of bone metastasis, while bsi is related to the amount of bone metastasis. the degree of uptake on bone scintigraphy can be affected by the type of bone metastasis. therefore, t...

longevity of osseointegrated implants are intensely influenced by biomechanical factors. control of these factors prevents mechanical complications, which include fracture of screws, components, or materials veneering the framework. in this study, the impact of length and threads pitch of dental implants on the stress distribution and maximum von mises stress in implant-abutment complex and jaw...

conclusions metacarpal neck fractures are a common injury in young and active patients that results in substantial missed time from work. while the surgical indications are well-described, there is no consensus on the optimal treatment modality because of high complication rates. dorsal plating has higher complication rates than closed reduction and percutaneous pinning, but is necessary in com...