The main goal of the study was to determine the compounds released from titanium into the overlying oral mucosa and the other metals found in two-stage dental intra-osseous implants. The determined concentration of the metals was as follows: titanium from 1.7 to 13.1 μg g⁻¹, nickel 10.0–0.8 μg g⁻¹, aluminum 5.3–100.5 μg g⁻¹, zinc 16.1–118.8 μg g⁻¹, and copper 0.3–13.6 μg g⁻¹, respectively. Additionally, we also present the results of experiments carried out to determine the release of metal ions from two implant systems (Astra and Dentium) into a solution of lactic acid (1%). The quantitative analysis of the metal ions was performed by means of an emission spectroscope by inductively coupled plasma ICP-OES. Studies were also carried out on the surfaces of different implant systems, including: Osteoplant, Astra, Dentium, SKY, Neoss as well as Biomet. The research involved the use of scanning electron microscopy to determine the chemical composition and quality of these systems.