Answer: C

Reasoning: The Buehler test, implantation test and sensitization tests are performed in vivo, typically using guinea pigs or other animals, to evaluate skin hypersensitivity or tissue reactions to a dental material [Robinson 1990, PMID 2181736]. In contrast, the Ames (“Ame’s”) test is an in-vitro bacterial mutagenicity assay that uses Salmonella typhimurium strains, not animals, to screen materials for genotoxicity [Li 1990, PMID 2110583]. Therefore, the only option that is not an animal biocompatibility test is the Ames test.