摘要:
The invention relates to an implant (1), particularly a jaw implant, which comprises several structural zones (5, 6, 12) made of a material which is non-resorbable, particularly from bones, for the implantation on bones or at least in the vicinity of bones. In an advantageous further embodiment of the implant, two or more of said structural zones (5, 6, 12) have respectively different material properties, in particular different physical properties such as different deformation and/or strength properties. The invention also relates to a method for determining load-dependent deformations in different bone regions, according to which X-ray images of the bone regions are taken with and without mechanical load for comparison. By comparing the X-ray images taken of the individual bone regions under or without load, the resulting deformation can be determined due to the applied load.
摘要:
The invention relates to the use of core/shell particles whose shell forms a matrix and whose core is essentially solid and has an essentially monodisperse size distribution and whose shell is bonded to the core via an interlayer and whose shell has thermoplastic properties for the production of mouldings having homogeneous, regularly arranged cavities, to a process for the production of mouldings having homogeneous, regularly arranged cavities, and to the corresponding mouldings.
摘要:
A composite material for plain bearings comprises a backing layer, a bearing metal layer consisting of a copper alloy with a copper content of from 50 to 95 wt. % or an aluminum alloy with an aluminum content of from 60 to 95 wt. %, a diffusion barrier layer and an overlay, applied by electroplating, consisting of a lead-free, tin and copper-containing alloy. The invention provides a composite multilayer material whose overlay, applied by electroplating, does not exhibit any embrittlement even at relatively high temperatures, irrespective of the copper content. The overlay preferably comprises from 8 to 30 wt. % copper, 60 to 97 wt. % tin and 0.5-19 wt. % cobalt.
摘要:
The invention relates to a process for the preparation of inverse opals having adjustable channel diameters. This is achieved by partial fusing of solid organic or inorganic spheres.
摘要:
The invention relates to the use of core/shell particles, the core of which essentially comprises a degradable polymer with an essentially mono-disperse size distribution and the shell of which forms a matrix, which can be pyrolysed to give a carbon matrix, for the production of shaped bodies with regularly-arranged cavities and the corresponding shaped bodies.
摘要:
The invention relates to the use of core/shell particles whose shell forms a matrix and whose core is essentially solid and has an essentially monodisperse size distribution as template for the production of inverse opal structures, and to a process for the production of inverse opal-like structures using core/shell particles of this type.
摘要:
A crestal implant including an elongate anchoring section, an implant stump and a transition section. The anchoring section has an elongate core from which several ribs extend forming rib groups. One or more surfaces which extend in the circumferential direction at a radial reference distance from the longitudinal central axis are provided on the transition section. One or more rib groups, in which the radially outer rib edge of the ribs has a radial distance from the longitudinal central axis of the implant, at least approximately corresponding to the radial reference distance, and one or more rib groups are provided within which only some ribs thereof, or within which all the ribs thereof, have on the radially outer rib edges along the entire or partial circumferential extension, a radial distance from the longitudinal central axis which is greater than the radial reference distance.
摘要:
The invention relates to an implant (1), particularly a jaw implant, which comprises several structural zones (5, 6, 12) made of a material which is non-resorbable, particularly from bones, for the implantation on bones or at least in the vicinity of bones. In an advantageous further embodiment of the implant, two or more of said structural zones (5, 6, 12) have respectively different material properties, in particular different physical properties such as different deformation and/or strength properties. The invention also relates to a method for determining load-dependent deformations in different bone regions, according to which X-ray images of the bone regions are taken with and without mechanical load for comparison. By comparing the X-ray images taken of the individual bone regions under or without load, the resulting deformation can be determined due to the applied load.
摘要:
A composite multilayer material is described, which exhibits a relatively high specific load carrying capacity and relatively low wear. The composite multilayer material for plain bearings comprises a backing layer, a bearing metallayer (1), a first intermediate layer (2) of nickel, a second intermediate layer (3) of tin and nickel together with an overlay (4) consisting of copper and tin. The overlay (4) comprises a tin matrix (5), into which tin-copper particles (6) are incorporated, which consist of 39 to 55 wt. % copper, the rest being tin. At high temperatures, as occur in the case of plain bearings used in internal combustion engines, the tin migrates into the second intermediate layer (3) therebelow, resulting in concentration of the tin-copper particles (6).