摘要:
Methods and compositions for producing flowable compositions, e.g. pastes, that set into calcium phosphate products are provided. In the subject methods, dry reactants that include a calcium source and a phosphate source are combined with a setting fluid to produce the flowable composition. A feature of the subject methods is that the dry reactants include a particulate calcium and/or phosphate reactant having a mean particle size of less than about 8 μm and narrow size distribution. Also provided are the compositions themselves as well as kits for use in practicing the subject methods. The subject methods and compositions produced thereby find use in a variety of applications, including the repair of hard tissue defects, e.g., bone defects.
摘要:
CO2-sequestering formed building materials are provided. The building materials of the invention include a composition comprising a carbonate/bicarbonate component. Additional aspects of the invention include methods of making and using the CO2-sequestering formed building material.
摘要:
Methods and devices for at least reducing the mass of, if not dissolving, renal calculi in situ are provided. In the subject methods, a renal calculus is contacted, e.g. flushed, with an acidic dissolution solution in situ, where the acidic dissolution solution is a solution of a strong, inorganic acid, e.g. hydrochloric acid. In many embodiments, the renal calculus is first enclosed in an isolated local environment of a device prior contact with the dissolution solution. Also provided are novel devices and kits for practicing the subject invention.
摘要:
Methods and devices are provided for at least reducing the mineral content of a vascular calcified lesion, i.e. a calcified lesion present on the vascular tissue of a host. In the subject methods, the local environment of the lesion is maintained at a subphysiologic pH for a period of time sufficient for the mineral content of the lesion to be reduced, e.g. by flushing the lesion with a fluid capable of locally increasing the proton concentration in the region of the lesion. Also provided are systems and kits for practicing the subject methods. The subject methods and devices find particular use in the treatment of vascular diseases associated with the presence of calcified lesions on vascular tissue.
摘要:
Kits for use in the treatment of vascular calcified lesions are provided. The subject kits include at least one of: (a) a fluid delivery means for conveying fluid to and from a vascular site; and (b) a dissolution fluid for at least partially dissolving the target lesion. In many embodiments, the kits include both of these components. The subject kits further include instructions for treating vascular calcified lesions with the contents of the kit, where the instructions are typically recorded on a recording medium, e.g. printed on a substrate, such as paper.
摘要:
Methods of enhancing fluid flow through a vascular site occupied by a vascular occlusion, as well as systems and kits for use in practicing the same, are provided. In practicing the subject methods, the vascular site is flushed simultaneously with a first dissolution fluid and a second dissolution fluid attenuating fluid, where flushing is carried out in a manner such that only a surface of the vascular occlusion is contacted with the non-attenuated dissolution fluid. Flushing is carried out in this manner for a period of time sufficient for fluid flow through the vascular site to be enhanced, e.g. increased or established. The subject methods, systems and kits for practicing the same find use in the treatment of a variety of different vascular diseases characterized by the presence of vascular occlusions, including both partial and total occlusions.
摘要:
Methods and devices are provided for at least reducing the mineral content of a vascular calcified lesion, i.e. a calcified lesion present on the vascular tissue of a host. In the subject methods, the local environment of the lesion is maintained at a subphysiologic pH for a period of time sufficient for the mineral content of the lesion to be reduced, e.g. by flushing the lesion with a fluid capable of locally increasing the proton concentration in the region of the lesion. Also provided are catheters for use in performing the subject methods, where the catheters at least include a first lumen capable of delivering fluid to a vascular site and a second lumen capable of removing fluid from a vascular site. The subject methods and devices find particular use in the treatment of vascular diseases associated with the presence of calcified lesions on vascular tissue.
摘要:
Carbonated hydroxyapatite compositions and their preparation are described. The compositions are biologically resorbable and are prepared as flowable masses which can be administered by syringe to set in situ to serve as a support structure, filler, prosthesis or the like. Optionally the compositions may include proteins or serve as a depot for compositions of pharmacological interest.
摘要:
Methods for producing a room temperature stable, phase pure .alpha.-C.sub.3 P product, and compositions derived therefrom, are provided. In the subject method, a tricalcium phosphate source is heated to a temperature sufficient to convert substantially all of said tricalcium phosphate source to a substantially phase pure .alpha.-C.sub.3 P product. The temperature of the resultant product is rapidly cooled to a temperature below about 700.degree. C., resulting in a room temperature stable, reactive .alpha.-C.sub.3 P product. The resultant .alpha.-C.sub.3 P product may be milled to provide an .alpha.-C.sub.3 P composition which may find use in the preparation of calcium phosphate cements.
摘要:
Methods and compositions for use in bone repair are provided. The subject methods employ a two component calcium phosphate cement having a dry component and a lubricant, wherein the dry component of the cement comprises basic calcium phosphate particles at least partially coated with a partially neutralized acidic calcium phosphate. In the subject methods, the dry component and lubricant of the cement are combined to produce a moldable paste which is capable of hardening into a solid mass. The moldable paste may be introduced at a bone repair site and allowed to harden in situ. Alternatively the paste may be allowed to harden and then shaped to obtain a preformed object useful in bone repair.