in this investigation the thickness of enamel in the gingival, middle, and incisal thirds of the labial surface of the anterior teeth were measured regarding preparation of the teeth for porcelain laminate veneers.part one, 20 extracted intact human maxillary central and lateral incisors ten of each were selected. the teeth were imbedded in autopolimerize acrylic resin. cross section was prefor...

introduction: skull base meningiomas constitute a large proportion of the meningiomas, which are the most common benign brain tumors. the treatment of skull base meningiomas is specially challenging and controversial due to the proximity of these tumors to the vital brain structures. radiosurgery is now emerging as an efficient alternative treatment modality which involves the ablation of tumor...

conclusions although evaluations of the initial vital signs and physical examinations are still important, the history regarding the source of the stab wounds (aisw vs. sisw) may be helpful in determining the appropriate treatment methods and predicting patient outcomes. results a total of 19 patients had undergone exploratory laparotomy. of the nine patients with sisw undergoing this procedure...

In order to increase the structural performance of rotary tillage knife, a badger claw toe was selected as bionic prototype and optimization design knife carried out. The similarity between badger’s tiller is 0.7073 by fuzzy algorithm, shape goodness fit final mole’s digging shovel 0.9556 MATLAB. Using 3D modeling software NX10.0, we established three-dimensional model knife. Furthermore, use W...

Image formation with partially coherent radiation is evaluated with the Hopkins formula and then applied to x-ray microscopy. Image characteristics expected from instruments with circular and annular pupils in partially coherent conditions are considered for two-point objects and a knife-edge object. The theoretically expected values for image characteristics that are easy accessible by an expe...

Securing the knives merely involves dropping them into the rectangular slot and fitting the free-clearance pin, which is secured in place by a simple split pin. Because of the forwardtilted knife mounting, both the centrifugal and the cane reaction forces on the knives are in the same backward direction. This ensures that although loosely mounted, the knife remains firmly located against stops ...

The regular production of a satisfactory edge on a microtome knife for the cutting of sections as thin as 2 u, which are free from scores and other blemishes, is a serious technical problem in histological laboratories. Eyen when a good edge is produced on a knife, its life is generally limited because contact with any hard material in the specimen may damage the delicate edge, causing it to sc...

BACKGROUND Trigeminal neuralgia is a debilitating condition caused by compression of the trigeminal nerve, ganglions, or divisions. Gamma knife radiosurgery has been increasingly used in the treatment of trigeminal neuralgia as a non-invasive alternative to microvascular decompression and rhizotomies. METHODS We reviewed the medical literature regarding outcomes, time course, and prognostic f...

BACKGROUND We present a rare case of an intraparenchymal nonmissile penetrating spinal injury (NMPSI) occurring at the T11 level in a patient presenting without neurological deficit. CASE DESCRIPTION The patient sustained a knife wound that penetrated the lamina without incurring bony injury and entered the spinal cord at the T11 level. During surgery, the intramedullary penetration of the co...