in design of defense structures, concrete are often used to provide protection against incidental dynamic loadings such as the impact of a steel projectile. in the present study, a new analytical model is proposed to predict penetration depth into concrete targets by ogive nose projectile. hence, to ­ develop the model and simulate penetration of high velocity ogive-shape nose steel projectiles...

introduction: the aim of this study was to compare the discoloration potential of calcium-enriched mixture (cem) cement, white mineral trioxide aggregate (wmta) and calcium hydroxide (ch), after placement in pulp chamber. methods and materials: access cavities were prepared in 40 intact maxillary central incisors. then, a 2×2 mm box was prepared on the middle third of the inner surface on the b...

Background: The access cavity is a critical stage in root canal therapy and it may influence the subsequent steps of treatment. new minimally invasive endodontic preparation concept aims to preserve sound tooth structure by conserving as much intact dentine possible including pulp chamber's roof, keep teeth from fracturing during after While there great interest such opening designs numerous pu...

Introduction After the loss of teeth in the posterior maxilla, the thickness or vertical height between the alveolar crest and maxillary sinus may be insufficient to place dental implants. At present, maxillary sinus lifting has become a widely used technique for augmenting bone tissue volume in the maxilla. Various surgical techniques can be applied to achieve a sufficient bone volume in order...

Importance The rabbit is the primary animal model used to investigate aspects of nasal surgery. Although several studies have used this model, none has provided a comprehensive analysis of the surgical anatomy and techniques used to gain access to the rabbit nasal fossae and septum. Objective To describe and optimize the surgical anatomy and approach to the rabbit nasal vault and septal carti...

introduction: knowledge of the anatomic location and dimension of the molar pulp chamber may preserve healthy pulp during operative procedure and reduce risk of perforation of chamber during access preparation. a review of literatures regarding the morphology of pulp chamber however revealed very little information; so the aim of this in vivo study was to measure the dimensions of first molar p...

background and aims. a correct diagnosis is the most important step in the treatment of oral lesions and each oral lesion has specific clinical features that provide clinical diagnosis; however, some of these features are common among different lesions. in these situations, biopsy and histopathological examination are indicated. the aim of this study was to evaluate the relationship between cli...

Methods Forty female BALB/c mice were randomly assigned into 2 groups. The mice were anesthetized and then midline abdominal incision was made. Peritoneal injury was given using cytobrush until deperitonealization. The experimental group (n = 20) received NF-κB decoy oligodeoxynucleotide (NF-κB decoy ODN) in the peritoneal cavity before abdominal closure, while the control group (n = 20) receiv...