摘要:
Embodiments of apparatus, systems, and methods relating to biomedical implants and other devices made up of unique and improved alumina-zirconia ceramic materials. In an example of a method according to an implementation of the invention, a slurry is prepared, compressed, and fired to obtain a fired ceramic piece comprising at least aluminum oxide, zirconium dioxide, yttrium oxide, cerium oxide, strontium oxide, magnesium oxide, titanium dioxide, and calcium oxide. Some embodiments and implementations may comprise selected concentrations of one or more such compounds to yield certain preferred results.
摘要:
Methods for improving the antibacterial characteristics of biomedical implants and related implants manufactured according to such methods. In some implementations, a biomedical implant comprising a silicon nitride ceramic material may be subjected to a surface roughening treatment so as to increase a surface roughness of at least a portion of the biomedical implant to a roughness profile having an arithmetic average of at least about 500 nm Ra. In some implementations, a coating may be applied to a biomedical implant. Such a coating may comprise a silicon nitride ceramic material, and may be applied instead of, or in addition to, the surface roughening treatment process.
摘要:
Ceramic implants, such as spinal implants, may comprise a dense shell and a porous core. In some implementations, methods for manufacturing the implants may comprise one or more stages at which the core material abuts the shell so as to form a mechanical attachment therewith while both the core and the shell are in a green state. The core and the shell may be fired together, and the resultant implant may, in some embodiments, comprise a unitary piece of ceramic material. Some embodiments may comprise silicon nitride ceramic materials.
摘要:
Embodiments of biomedical implants and other devices made up of a composite of materials comprising metal and/or metal alloys and ceramics. In some embodiments, a modular biomedical implant may comprise a first metallic member comprising at least one of a metal and a metal alloy, a second metallic member comprising at least one of a metal and a metal alloy, and a ceramic sleeve positioned in between the first metallic member and the second metallic member so as to at least substantially prevent contact between the first metallic member and the second metallic member.
摘要:
Ceramic materials comprising charge-compensating dopants and related methods. In some embodiments, the materials may comprise dopants such as Y2O3, Gd2O3, Nb2O5, and/or Ta2O5. Some embodiments may comprise a molar concentration of Y2O3 and/or Gd2O3 that is at least approximately equal to the molar concentration of Nb2O5 and/or Ta2O5. Certain embodiments and implementations may comprise particular, unique concentrations or concentration ranges of various compounds/materials in order to improve performance for use of such ceramic materials as biomedical implants.
摘要翻译:包括电荷补偿掺杂剂和相关方法的陶瓷材料。 在一些实施例中,材料可以包括掺杂剂,例如Y 2 O 3,Gd 2 O 3,Nb 2 O 5和/或Ta 2 O 5。 一些实施方案可以包含至少大约等于Nb 2 O 5和/或Ta 2 O 5的摩尔浓度的Y 2 O 3和/或Gd 2 O 3的摩尔浓度。 某些实施方案和实施方式可以包括各种化合物/材料的特定浓度或浓度范围,以便提高使用这种陶瓷材料与生物医学植入物的性能。
摘要:
Ceramic orthopedic implants may have one or more dense inner layers and one or more porous outer layers. Methods for manufacturing the implants may include one or more stages during which the dense inner layer(s) are partially compressed. At least one porous outer layer may include coating particles that are present at a surface of one or more inner layer(s) while pressure is applied to attach the coating particles to the inner layer(s) and to further compress one or more of the inner layer(s). Various layers may be formed until an implant, or other device, is formed having the desired density gradient and/or other properties, as disclosed herein.
摘要:
Methods for improving the antibacterial characteristics of biomedical implants and related implants manufactured according to such methods. In some implementations, a biomedical implant comprising a silicon nitride ceramic material may be subjected to a surface roughening treatment so as to increase a surface roughness of at least a portion of the biomedical implant to a roughness profile having an arithmetic average of at least about 500 nm Ra. In some implementations, a coating may be applied to a biomedical implant. Such a coating may comprise a silicon nitride ceramic material, and may be applied instead of, or in addition to, the surface roughening treatment process.
摘要:
Ceramic materials comprising charge-compensating dopants and related methods. In some embodiments, the materials may comprise dopants such as Y2O3, Gd2O3, Nb2O5, and/or Ta2O5. Some embodiments may comprise a molar concentration of Y2O3 and/or Gd2O3 that is at least approximately equal to the molar concentration of Nb2O5 and/or Ta2O5. Certain embodiments and implementations may comprise particular, unique concentrations or concentration ranges of various compounds/materials in order to improve performance for use of such ceramic materials as biomedical implants.
摘要翻译:包括电荷补偿掺杂剂和相关方法的陶瓷材料。 在一些实施例中,材料可以包括掺杂剂,例如Y 2 O 3,Gd 2 O 3,Nb 2 O 5和/或Ta 2 O 5。 一些实施方案可以包含至少大约等于Nb 2 O 5和/或Ta 2 O 5的摩尔浓度的Y 2 O 3和/或Gd 2 O 3的摩尔浓度。 某些实施方案和实施方式可以包括各种化合物/材料的特定浓度或浓度范围,以便提高使用这种陶瓷材料与生物医学植入物的性能。
摘要:
Embodiments of apparatus, systems, and methods relating to biomedical implants and other devices made up of unique and improved alumina-zirconia ceramic materials. In an example of a method according to an implementation of the invention, a slurry is prepared, compressed, and fired to obtain a fired ceramic piece comprising at least aluminum oxide, zirconium dioxide, yttrium oxide, cerium oxide, strontium oxide, magnesium oxide, titanium dioxide, and calcium oxide. Some embodiments and implementations may comprise selected concentrations of one or more such compounds to yield certain preferred results.
摘要:
Ceramic implants, such as spinal implants, may comprise a dense shell and a porous core. In some implementations, methods for manufacturing the implants may comprise one or more stages at which the core material abuts the shell so as to form a mechanical attachment therewith while both the core and the shell are in a green state. The core and the shell may be fired together, and the resultant implant may, in some embodiments, comprise a unitary piece of ceramic material. Some embodiments may comprise silicon nitride ceramic materials.