The impact resistance of commonly used eye protector lens materials is measured with a ballistic system, using YA inch (6.3 mm.) and Vs inch (3.2 vim.) steel balls. The results, taken in conjunction with the findings of earlier drop-tower work, permit a comprehensive evaluation of the impact resistance of 3 mm. and 2 mm. thicknesses of allyl resin and thermally toughened glass against a series ...

BACKGROUND Anterior cruciate ligament (ACL) injuries are significant injuries in elite-level basketball players. In-game statistical performance after ACL reconstruction has been demonstrated; however, few studies have reviewed functional performance in National Basketball Association (NBA)-caliber athletes after ACL reconstruction. PURPOSE To compare NBA Combine performance of athletes after...

An idealized axisymmetric finite element model of a second premolar restored with a post and core was used to study the distribution and magnitude of stresses as a function of the following parameters: the diameter of the post, the length and the shape of the post, and finally the interface characteristics between post and cement. Emphasis was directed toward the cement layer interposed between...

The Freshwater Sawfish Pristis microdon was captured in marine waters of King Sound, and estuarine and fresh waters of the Fitzroy and Robinson rivers, in the Kimberley region of Western Australia. In light of the IUCN listing of the species as critically endangered, non-destructive means, including tagging-recapture data and information from specimens found dead on the banks, were utilised. Ob...

The general dental practitioner must consider orthodontic extrusion of a tooth when a subgingival defect, such as, crown fracture occurs before prosthetic rehabilitation, especially in the aesthetic zone. Extrusion enables the root portion to be elevated which exposes sound tooth structure for placement of restorative margins. This case report describes the multidisciplinary management of a fra...

objective : tooth eruption has been a subject of extensive scientific studies; and literature is replete with different mechanisms of migration of a tooth from its bony crypt into the oral cavity. however, there is no common ground on the nature and source of the propelling force among the proponents of these theories. the purpose of this study was to explore the possibility of unifying the cur...

Background and Aim :The most esthetic smile is when the entire length of crown tooth 2 mm gums are visable. Most it not aesthetically pleasing called gummy or gingival smile.Upper lip one factors influencing smile. The aim present study was to investigate upper in patients with vertical growth pattern, without related factors.

Extraction versus non-extraction debate has been a major controversy in orthodontics and it is still continuing since Angle era. Extraction of premolar teeth is the conventional treatment of choice for the management of class I malocclusion cases but in border line cases, orthodontists find difficulty in making a decision particularly in cases with good facial esthetics. However class I maloccl...