Biomaterials Cheat Sheet

The core ideas of Biomaterials distilled into a single, scannable reference — perfect for review or quick lookup.

PiqCue — piqcue.com/biomaterials/cheatsheet

Quick Reference

Biocompatibility

The ability of a material to perform its intended function within a living system without provoking an adverse immune response, toxicity, or rejection. Biocompatibility is evaluated through a series of in vitro and in vivo tests defined by ISO 10993 standards.

Biodegradation

The chemical or enzymatic breakdown of a material within the body over time into non-toxic byproducts that can be metabolized or excreted. The rate of degradation is engineered to match the rate of tissue healing.

Osseointegration

The direct structural and functional connection between living bone and the surface of a load-bearing implant, without intervening fibrous tissue. The concept was pioneered by Per-Ingvar Branemark in the 1960s.

Tissue Engineering Scaffold

A three-dimensional porous structure made from a biomaterial that serves as a template for cell attachment, proliferation, and differentiation, ultimately guiding the formation of new functional tissue.

Surface Modification

The deliberate alteration of a biomaterial's surface chemistry, topography, or energy to improve its interaction with biological tissues, enhance cell adhesion, reduce bacterial colonization, or improve wear resistance.

Drug Delivery Systems

Biomaterial-based devices or formulations designed to transport therapeutic agents to specific sites in the body and release them at controlled rates, improving efficacy and reducing systemic side effects.

Host Response and Foreign Body Reaction

The cascade of biological events triggered when a material is implanted, including protein adsorption, acute inflammation, chronic inflammation, foreign body giant cell formation, and fibrous capsule encapsulation.

Mechanical Properties Matching

The principle that an implant's stiffness, strength, and fatigue resistance should closely match those of the surrounding tissue to prevent stress shielding, implant loosening, or tissue damage.

Bioresorbable Materials

Materials that dissolve or are metabolized by the body after fulfilling their temporary function, eliminating the need for a second surgery to remove the device.

Bioprinting

An additive manufacturing technique that uses cell-laden bioinks to fabricate three-dimensional tissue constructs layer by layer, with the goal of creating functional tissues or organs for transplantation or drug testing.

Key Terms at a Glance

Biocompatibility:The ability of a material to perform its intended function within a biological environment without causing adverse effects.

Biodegradation:The breakdown of a material by biological processes such as hydrolysis or enzymatic activity into harmless byproducts.

Bioactive Material:A material that elicits a specific biological response at its surface, such as bonding to bone tissue.

Bioinert Material:A material that does not interact significantly with surrounding tissue and is encapsulated by a fibrous layer.

Bioresorbable Material:A material that dissolves or is metabolized by the body over time, eventually being completely replaced by natural tissue.

Bioprinting:An additive manufacturing process that uses bioinks containing living cells to fabricate three-dimensional tissue constructs.

Biomimicry:The design of materials and structures that imitate the forms, processes, or properties found in nature.

Cobalt-Chromium Alloy:A metallic biomaterial with high wear and corrosion resistance, used in joint replacement bearing surfaces and dental prosthetics.

Decellularization:The process of removing all cellular material from a tissue while preserving the extracellular matrix for use as a scaffold.

Drug-Eluting Stent:A vascular stent coated with a drug-releasing polymer to prevent restenosis after coronary angioplasty.

Electrospinning:A fabrication technique using electric fields to produce nanoscale polymer fibers for scaffolds and wound dressings.

Extracellular Matrix (ECM):The structural network of proteins and carbohydrates surrounding cells that provides support and biochemical signaling.

Foreign Body Reaction:The immune response cascade triggered by an implanted material, culminating in fibrous capsule formation.

Hemocompatibility:The compatibility of a material with blood, characterized by minimal thrombosis, hemolysis, and immune activation.

Hydrogel:A crosslinked polymer network capable of absorbing large amounts of water, mimicking soft tissue properties.

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