Search results
Results From The WOW.Com Content Network
[2] [3] In the field of controlled drug delivery, biodegradable polymers offer tremendous potential either as a drug delivery system alone or in conjunction to functioning as a medical device. [4] In the development of applications of biodegradable polymers, the chemistry of some polymers including synthesis and degradation is reviewed below.
Bioresorbable (also called biodegradable or bioabsorbable) metals are metals or their alloys that degrade safely within the body. [1] The primary metals in this category are magnesium-based [ 2 ] [ 3 ] and iron-based alloys, [ 4 ] although recently zinc has also been investigated.
The medical implant is mainly fabricated using stainless steel and titanium alloys for strength and the plastic coating that is done on it acts as an artificial cartilage. [2] The biodegradable metals in this category are magnesium-based [ 3 ] and iron-based alloys, though recently zinc has also been investigated. [ 4 ]
Biodegradable implants are made of materials, typically, either water-soluble or metabolizable to degrade into un-harmful byproducts which can be safely excreted by the human body. [2] [4] It is important to note the release of the therapeutic drug is determined by the degradation of the implant and the diffusion rate of the drug substance. [2]
Metallic glasses based on magnesium with zinc and calcium addition are tested as the potential biocompatible metallic biomaterials for biodegradable medical implants [14] Biocompatibility (or tissue compatibility) describes the ability of a material to perform with an appropriate host response when applied as intended.
One can find titanium in neurosurgery, bone conduction hearing aids, false eye implants, spinal fusion cages, pacemakers, toe implants, and shoulder/elbow/hip/knee replacements along with many more. The main reason why titanium is often used in the body is due to titanium's biocompatibility and, with surface modifications, bioactive surface.
Biodegradable implant materials can now be used for minimally invasive surgical procedures through degradable thermoplastic polymers. These polymers are now able to change their shape with increase of temperature, causing shape memory capabilities as well as easily degradable sutures.
Polymer implant eluting drugs. Drug eluting implants encompass a wide range of bioactive implants that can be placed in or near a tissue to provide a controlled, sustained or on demand release of drug while overcoming barriers associated with traditional oral and intravenous drug administration, such as limited bioavailability, metabolism, and toxicity. [1]