Cytotoxicity Tests: These tests evaluate whether a material causes cell death or inhibits cell growth. They are a fundamental part of biocompatibility assessments. Sensitization Tests: These tests determine if a material causes an allergic reaction upon repeated exposure. They are essential for products that are in prolonged contact with skin. Intracutaneous Reactivity Tests: These tests assess localized irritation when a material is injected under the skin. Systemic Toxicity Tests: These tests evaluate the potential of a material to cause systemic effects after acute exposure. They provide insight into the overall toxicity of a material.