this article aims to review various modes of fracture toughness of resin composites. also, this study intends to review the papers on the fracture mode, namely “fractography”, under scanning electron microscopy finding fracture initiation site, and the effect of filler content on the fracture toughness of resin composites. it will also review the effect of aging on the fracture toughness of res...

introduction: the restoration of endodontically treated teeth is a topic that has been studied extensively but it is still a challenge for dental practitioners. the aim of this study was to evaluate fracture resistance, fracture patterns and fracture location of endodontically treated human maxillary premolars restored with direct and indirect composite resin and ceramic restoration. methods: e...

The effect of acidizing process on the stress corrosion cracking HP-13Cr stainless steel in ultra-depth well environment was studied by slow strain rate test, electrochemical measurement, microstructure observation, and finite element modeling. results indicated that significantly increased susceptibility induced fracture mode to brittle characteristic high temperature CO 2 pressure environment...

introduction iatrogenic patellar fracture is reported as a complication of patella procedures, such as medial patellofemoral ligament reconstruction, reconstruction of the anterior cruciate ligament of the knee using bone-patellar tendon-bone technique, and resurfacing the patella in total knee arthroplasty. case presentation a 65-year-old lady with right patella fracture was treated with open ...

results at follow-up, the nonoperatively treated patients had better functional outcomes than the operatively treated patients. nonoperatively treated patients also scored better on pain intensity and satisfaction. there were no significant differences in cesd, pcs, and sf-36 physical- and mental health summary scores between cohorts. conclusions the results of this study suggest that operative...

China produces and consumes most of coal in the world. This situation is expected to continue within a certain period in the future. Currently, Chinese coal industry is confronted with several serious problems relating to land resource, water resource, environmental, and ecological sustainability. Coal resource exploitation causes the permanent fracture and movement of strata structure, which h...

In order to explore the optimal mining strategy of a fractured Enhanced Geothermal System (EGS) reservoir, we numerically investigated influence seven factors on heat production and conducted an optimization analysis multi-factor multi-level combination by orthogonal test based geological data at Qiabuqia geothermal field. Seven were considered, including five reservoir (fracture spacing, fract...

The coastal region of southwest Saudi Arabia contains a thick sequence Late Oligocene basalts in the Jizan Group, which accumulated along continental rift that preceded opening Red Sea. These are targeted for disposal CO 2 emitted from industrial sources by subsurface carbon mineralization processes. potential Group depends on having adequate permeability fracture networks capable conducting in...

Background: Osteoporosis is a common condition among the elderly population, and is associated with an increased risk of fracture. One of the most common fragility fractures involve the distal radius, and are associated with risk of subsequent fragility fracture. Early treatment with bisphosphonates has been suggested to decrease the population hip fracture burden. However, there have been no p...