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Related Concept Videos

Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

108
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Modified-Release Drug Delivery Systems: Rate-Programmed II01:19

Modified-Release Drug Delivery Systems: Rate-Programmed II

85
Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...
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Modified-Release Drug Delivery Systems: Stimuli-Activated01:30

Modified-Release Drug Delivery Systems: Stimuli-Activated

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Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also...
114
Oral Drug Delivery Systems: Delayed-Release Systems01:11

Oral Drug Delivery Systems: Delayed-Release Systems

134
Delayed-release drug delivery systems are specialized pharmaceutical formulations designed to postpone the release of active compounds until the drug reaches a specific region of the gastrointestinal (GI) tract, typically the intestine. These systems are essential for drugs that may cause gastric irritation, are unstable in acidic environments, or need to exert therapeutic effects locally in the intestinal or colonic regions.The core feature of delayed-release systems is the use of enteric...
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Modified-Release Drug Delivery Systems: Classification01:23

Modified-Release Drug Delivery Systems: Classification

249
Modified-release drug delivery systems improve drug efficacy and minimize side effects by controlling the rate and location of drug release. These systems fall into three categories: rate-programmed, stimuli-activated, and site-targeted.Rate-programmed systems release drugs at a predetermined rate, maintaining consistent therapeutic levels and reducing fluctuations that could lead to toxicity or subtherapeutic effects. These systems use polymeric matrices, reservoir-based designs, or osmotic...
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Bioplastics01:27

Bioplastics

18
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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Updated: Mar 27, 2026

Biological Compatibility Profile on Biomaterials for Bone Regeneration
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Biodegradable Natural Polymer-Based Drug Delivery Systems for Bone Tissue Engineering.

Hyejin Jo1, Shinwon Kang1, Jae Eun Yang1

  • 1Department of Biomedical Engineering, Dongguk University, Seoul, South Korea.

Medicinal Research Reviews
|March 26, 2026
PubMed
Summary
This summary is machine-generated.

Biodegradable natural polymer scaffolds offer advanced drug delivery for bone regeneration, overcoming limitations of traditional treatments. Innovations in nanostructures and 3D fabrication enhance scaffold performance for next-generation bone tissue engineering.

Keywords:
biomaterialsbone tissue engineeringdrug delivery systemshydrogelnatural polymer‐based scaffoldsosteogenic differentiation

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Polymer Chemistry

Background:

  • Traditional bone treatments like grafts and implants have significant limitations, including immune rejection and delayed healing.
  • Bone diseases and injuries are increasing, particularly in aging populations, necessitating improved therapeutic strategies.
  • Drug delivery systems integrated into biomaterial scaffolds present a promising approach for enhanced bone regeneration.

Purpose of the Study:

  • To provide a comprehensive review of biodegradable natural polymer-based scaffolds for bone tissue engineering.
  • To examine scaffold architectures, natural polymer properties, and drug delivery capabilities.
  • To discuss recent advancements in nanostructured approaches and 3D fabrication techniques for scaffold enhancement.

Main Methods:

  • Review of literature on biodegradable natural polymer scaffolds.
  • Analysis of four principal scaffold architectures: sponges, nanofibers, hydrogels, and microspheres.
  • Examination of four natural polymers: collagen, cellulose, chitosan, and hyaluronic acid.
  • Discussion of nanostructured enhancements (e.g., nanocomposites, nanotube-loaded hydrogels) and 3D fabrication methods (e.g., 3D printing, electrospinning).

Main Results:

  • Natural polymer scaffolds demonstrate potential for osteogenesis and improved drug delivery.
  • Nanostructured approaches enhance drug delivery efficiency and mechanical properties.
  • Advanced 3D fabrication techniques allow precise control over scaffold architecture and biomolecule integration.
  • Sponges, nanofibers, hydrogels, and microspheres exhibit varying regenerative functionalities and limitations.

Conclusions:

  • Biodegradable natural polymer scaffolds are crucial for advancing bone tissue engineering.
  • Integration of nanostructures and sophisticated 3D fabrication techniques are key to developing next-generation bone regeneration platforms.
  • These engineered scaffolds offer improved therapeutic efficacy and overcome limitations of conventional bone treatments.