BACKGROUND Cobalt-chrome (CoCr) alloys have been used in dentistry in decades but very little is known about their behavior and biological impact as framework materials in implant dentistry. Furthermore, few studies have evaluated and compared the clinical and radiological results of abutment and abutment-free implant treatment concepts. AIMS To investigate in vitro CoCr and commercially pure...

ABSTRACT. Ti(III) and (IV) hydrazide complexes were synthesized, characterized, screened for their tyrosinase lipoxygenase inhibitory cytotoxic activities. The geometry of is tentatively assigned as octahedral. Magnetic moments found around 1.7 B.M. electronic spectral transition in the range 495-518 nm. Evaluation Ti(IV) activities revealed varying inhibition potential. Hydrazide ligands inact...

TiCl3 and NH3 form octaammine titanium(III) chloride ammonia (1/6), [Ti(NH3)8]Cl3·6NH3, which is the first structurally characterized octaammine complex of a transition metal. An excess of TiCl3 reacts with UF4 in liquid NH3 and forms octaammine fluorido uranium(IV) chloride ammonia (1/3.5), [UF(NH3)8]Cl3·3.5NH3. It shows a distorted threefold-capped trigonal-prismatic coordination sphere aroun...

Potassium rubidium cobalt(II)/titanium(IV) tris-(orthophosphate), Rb0.743K0.845Co0.293Ti1.707(PO4)3, has been obtained using a high-temperature crystallization method. The obtained compound has a langbeinite-type structure. The three-dimensional framework is built up from mixed-occupied (Co/Ti(IV))O6 octa-hedra (point group symmetry .3.) and PO4 tetra-hedra. The K(+) and Rb(+) cations are stati...

The mononuclear title compound, [Ti(C(5)H(10)NO(2))(4)], is a rare example of an eight-coordinate Ti(IV) compound in which all donor atoms are O atoms. The coordination geometry around Ti(IV) is pseudo-dodeca-hedral and the O-C-O angles of the carbamate ligands are slightly compressed [range 115.3 (2)-116.7 (2)°], apparently on account of the high coordination number. One ethyl group is disorde...

In the title compound, [Ti(C(8)H(13)Si)(C(11)H(21)Si(2))Cl(2)], the Ti(IV) atom is bonded to two Cl atoms, one 1,3-bis-(trimethyl-sil-yl)cyclo-penta-dienyl (Si(2)Cp) and one (trimethyl-sil-yl)cyclo-penta-dienyl ring (SiCp). The Si(2)Cp centroid-titanium distance is 2.0763 (10) Å and the SiCp centroid-titanium distance is 2.0793 (10) Å. The angle subtended at the Ti atom by the centroids of both...

Buccal allergies represent a growing problem and often go undiagnosed by health professionals. There is an increase in the prevalence of oral allergies to dental materials, and especially to metals used in dental materials. Titanium, used in orthopaedic devices and oral implants, although considered an inert material, can actually induce toxicity or allergic type I or IV reactions. Cases of an ...