Titanium Biocompatibility — MFDS Part 1 MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: A — Formation of an adherent, corrosion-resistant titanium dioxide surface film
The correct answer is A. On exposure to oxygen, titanium rapidly develops an adherent, protective titanium dioxide surface film. This passive layer limits corrosion and ion release and is central to titanium's favourable biological response at the bone–implant interface, thereby supporting osseointegration. Implant surface topography and chemistry also influence bone attachment, but the oxide film is the relevant intrinsic property among these options. Titanium's thermal conductivity is not matched to cortical bone and does not drive osseointegration. Its elastic modulus is not identical to cancellous bone, while matching enamel's thermal expansion is relevant neither to an endosseous interface nor to biological integration. Titanium is not ferromagnetic under physiological conditions, and magnetism is not responsible for osseointegration.
Reference: Ghodrati H et al. A narrative review of recent developments in osseointegration and anti-corrosion of titanium dental implants with nano surface. Bone Reports. 2025;23:101846. https://pubmed.ncbi.nlm.nih.gov/40454244/