The most common material used for dental implants is:

• A. Zirconia
• B. Copper alloys
• C. Gold alloys
• D. Titanium and titanium alloys

Answer: (D)

Titanium and its alloys are used most often because they combine excellent biocompatibility with the ability to form a strong, lasting bond with bone. The surface of titanium develops a stable oxide layer that resists corrosion in the mouth, which helps prevent adverse tissue reactions. Titanium also has a favorable strength-to-weight ratio and a modulus of elasticity that is closer to bone than many other metals, reducing stress shielding and helping the implant withstand chewing forces over many years. This combination supports reliable osseointegration—the direct structural and functional connection between bone and implant—which is essential for long-term stability. Zirconia is a ceramic alternative that’s used in some cases for aesthetic or metal-free options, but titanium implants have decades of clinical data backing their widespread use. Copper alloys and gold alloys don’t offer the same balance of biocompatibility, corrosion resistance, and osseointegration for standard implants, so they’re not the typical choice.