Intervertebral disc degeneration is one of the leading causes of back pain, but treatment options remain limited. Recently, there have been advances in the development of biomaterials for nucleus augmentation; however, the testing of such materials preclinically has proved challenging. The aim of this study was to develop methods for fabricating and testing bone-disc-bone specimens in vitro for...

In this study, affect of aging on wear characteristics the nano GNP reinforced Al6061 metal matrix composites. scope, samples were produced by hot press at 500 ℃ temperature under 50 MPa pressure for 30 minutes. The composites determined using ball-on disc test method. friction coefficient and ratio investigated. Graphene reinforcement significantly increased between stainless steel ball specim...

In order to determine the effect of internal cracks on tensile failure materials, a hybrid finite–discrete element method was used analyze Brazilian disc test with different angles. When pre-crack angle is between 0° and 60°, wing crack initiated from end. 90°, center. maximum principal stress plastic strain are concentrated at in As increased mode discs transits splitting into two parts four p...

objective: zirconia cores have limited light transmittance and data are scarce on light transmission through zirconia cores with and without the veneering ceramic.   methods: in this in vitro study, disc-shaped specimens (11.5 mm in diameter and 0.4 (0.05) mm in thickness) were fabricated of three types of zirconia namely mamut, heany and zirkonzahn (n=5). a disc-shaped specimen (11.5 mm in dia...

AIMS The purpose of this study was to draw up a TMJ disc histopathological score that is a semi-quantitative transcription of the entire spectrum of TMJ disc degenerative diseases related to changes in disc tissue, and then validate the proposed grading, in order to contribute to a standardized histopathological diagnosis. METHODS Sections from sixty two temporomandibular joint disc specimens...

  Objective: Zirconia cores have limited light transmittance and data are scarce on light transmission through zirconia cores with and without the veneering ceramic.   Methods: In this in vitro study, Disc-shaped specimens (11.5 mm in diameter and 0.4 (0.05) mm in thickness) were fabricated of three types of zirconia namely Mamut, Heany and ZirkonZahn (n=5). A disc-shaped specimen (11.5 mm in d...