摘要:
The present invention relates to ceramic precursor powder compositions and chemically bonded ceramic (CBC) materials, Ca-aluminate and/ or calcium silicate, and a composite biomaterial with prolonged shelf time of the precursor, suitable for orthopaedic applications with improved injectability. The present invention also relates to a method of manufacturing said cured material, bioelements, implants, or drug delivery carrier materials made by said cured material, a kit comprising the ceramic precursor powder and hydration liquid, as well as the use of said ceramic precursor powder and hydration liquid, or said cured material, for orthopaedic and dental applications,
摘要:
Described is a method to prepare wet foams exhibiting long-term stability wherein colloidal particles are used to stabilize the gas-liquid interface, said particles being initially inherently partially lyophobic particles or partially lyophobized particles having mean particle sizes from 1 nm to 20 µm. In one aspect, the partially lyophobized particles are prepared in-situ by treating initially hydrophilic particles with amphiphilic molecules of specific solubility in the liquid phase of the suspension.
摘要:
The invention relates to a ceramic endoprosthetic element comprising aluminium oxide and zirconium (di)oxide which is stabilised or unstabilised. Said material has a content gradient of aluminium oxide and zirconium (di)oxide. In the areas where tensile, bending and torsional stresses are elevated, the zirconium (di)oxide content is increased with respect to an articulation area which principally contains aluminium oxide. The inventive endoprosthetic element can be produced by infiltrating a presintered aluminium oxide open-pore matrix by means of a dense zirconium (di) oxide suspension, zirconium salt solution, spirit or sol containing zirconium or a mixture of at least two said solutions/liquids. The endoprosthetic element can also be produced by a method consisting in continuously filling a mould with aluminium oxide and zirconium (di)oxide powder in such a way that the ratio therebetween is modifiable during the filling of the mould.
摘要:
An improved biocompatible composition consisting of physiologically stable beads or particles carried in a lubricative suspension, solution, other fluid or gel. The composition is intended to be delivered into the body through a small-bored needle, cannula, or other catheter into a tissue site for the purpose of augmenting the tissue. In particular, the composition is useful for augmenting tissue in the area of the cardiac orifice of the stomach to reduce gastric reflux, in the area of the internal or external sphincter of the anal canal to reduce fecal incontinence or in the area of urethral tissue for the purpose of treating urinary incontinence.
摘要:
A permanent, biocompatible material for soft tissue augmentation. The biocompatible material comprises a matrix of smooth, round, finely divided, substantially spherical particles of a biocompatible ceramic material, close to or in contact with each other, which provide a scaffold or lattice for autogenous, three dimensional, randomly oriented, non-scar soft tissue growth at the augmentation site. The augmentation material can be homogeneously suspended in a biocompatible, resorbable lubricious gel carrier comprising a polysaccharide. This serves to improve the delivery of the augmentation material by injection to the tissue site where augmentation is desired. The augmentation material is especially suitable for urethral sphincter augmentation, for treatment of incontinence, for filling soft tissue voids, for creating soft tissue blebs, for the treatment of unilateral vocal cord paralysis, and for mammary implants. It can be injected intradermally, subcutaneously or can be implanted.
摘要:
The invention relates to ceramics and concerns Al2O3 sintering materials made from corundum powder, a process for the production of the said materials and their use as, for example, human implants or as a material for tools. According to the invention, high-grade, low-defect Al2O3 sintering materials with very high degrees of hardness or high degrees of hardness and strength are produced containing 95-100 vol.% Al2O3 and a Vickers micro hardness of » 2000 at a test load of 10-100 N; these sintering materials have a relative sinter density δ » 98.5 %, grain structure with a mean grain size of « 1.5 νm and inhomogeneities which occur with a frequency of
摘要:
The invention relates to ceramics and concerns Al2O3 sintering materials made from corundum powder, a process for the production of the said materials and their use as, for example, human implants or as a material for tools. According to the invention, high-grade, low-defect Al2O3 sintering materials with very high degrees of hardness or high degrees of hardness and strength are produced containing 95-100 vol.% Al2O3 and a Vickers micro hardness of » 2000 at a test load of 10-100 N; these sintering materials have a relative sinter density δ » 98.5 %, grain structure with a mean grain size of « 1.5 νm and inhomogeneities which occur with a frequency of
摘要:
Die Erfindung bezieht sich auf das Gebiet der Keramik und betrifft ein Al₂O₃-Sinterprodukt und ein Verfahren zu seiner Herstellung, das z.B. als Humanimplantat zur Anwendung kommen kann. Der Erfindung liegt die Aufgabe zugrunde, hochgradig defektarme Al₂O₃-Sinterprodukte mit hoher Härte anzugeben und herzustellen. Die Aufgabe wird gelöst durch ein Al₂O₃-Sinterprodukt mit 95 bis 100 Vol-% Al₂O₃ und einer Vickers-Kleinlast-Härte ≧ 2000 bei einer Prüflast von 10 N ≦ Prüflast ≦ 100 N (HV1 bis HV10), das ein Gefüge mit einer mittleren Korngröße von ≦ 1,5 µm, mit einer relativen Sinterdichte von ρ ≧ 98,5 % und mit Inhomogenitäten mit einer Häufigkeit von