purpose: the aim of this study was to evaluate the effect of two gingival finishing lines (90° shoulder and deep chamfer) on the marginal fitness of two types of full anatomic all-ceramic crowns; zirconia crowns (zikonzhan) and glass ceramic crowns (ips e-max cad) milled with cad/cam system. materials and methods: two dentoform teeth of left maxillary first molar were prepared with chamfer fini...

PURPOSE Biphasic calcium phosphate (BCP) ceramics are suitable for synthetic bone applications. The strontium substituted calcium phosphate ceramics have potential for use in orthopedic surgeries. Aim of the present work is to introduce strontium into BCP (composed of hydroxyapatite and tricalcium phosphate) ceramics and to study their bioactivity and mechanical properties. METHODS BCP cerami...

STUDY DESIGN Narrative review. OBJECTIVES Anterior cervical discectomy and fusion (ACDF) is a reliable procedure, commonly used for cervical degenerative disc disease. For interbody fusions, autograft was the gold standard for decades; however, limited availability and donor site morbidities have led to a constant search for new materials. Clinically, it has been shown that calcium phosphate ...

The good cladding of a large-sized Nd-doped phosphate glass slab as laser amplifier requires not only the amplified spontaneous emission and parasitic oscillation to be fully absorbed, hold up small signal gain coefficient Nd ions, but also absorbed heat energy appropriately dissipated extend uniform temperature field for larger beam aperture edge-cladded Nd–glass slab. In present work, numeric...

In this paper synthesis and characterization of a bioactive calcium phosphate glass-ceramic is presented, synthesized using a facile method. The glass-ceramic samples are synthesized with heat treating the parent glass at appropriate temperatures, where different calcium phosphate crystalline phases are grown in the parent glass samples during the heat treatment. The amounts of elements a...

One of the significant disadvantages quartz glass-based materials is their tendency to crystallize cristobalite during firing and, as a consequence, deterioration in performance. In order prevent crystallization ceramics sintering, number additives are used. However, all known options some disadvantages, namely, relatively low strength values and increased coefficient linear thermal expansion p...

Bioactive glass (BG) and glass-ceramics (GC) have been employed for bone treatment tissue engineering applications. glasses/bioglasses can be considered promising materials bone-regenerative scaffolds fabrication, owing to the adaptable properties that make them appropriately designed regarding their composition. The essential of bioactive glasses, enabling applied in tissue, explained as poten...

The non-isochemical crystallization of glasses leads to glass-ceramics in which the chemical composition of the amorphous matrix differs from that of the parent glass. It is challenging to solely analyse the properties of these residual glassy phases because they frequently contain finely dispersed crystals. In this study, the composition of the residual glass matrix after the crystallization o...

Periodontal disease is characterized by the destruction of periodontal tissues. Various methods of regenerative periodontal therapy, including the use of barrier membranes, bone replacement grafts, growth factors and the combination of these procedures have been investigated. The development of biomaterials for tissue engineering has considerably improved the available treatment options above. ...

Vitrification by melting is being proposed as a convenient method to solidify different kinds of silicate and other oxide-based inorganic wastes. Incinerator bottom and fly ashes have been mixed with glass cullet, feldspar and clay by-products as melting fluxing agents. Washing, drying, and grinding pre-treatments followed by melting at 1450 C lead to the formation of glasses and glass-ceramics...