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. 2013 Sep 11;2013:539834. doi: 10.1155/2013/539834

Figure 2.

Figure 2

Lymphocyte proliferation response of the PBMC of the 14 healthy individuals without titanium dental implants (open bar) and 6 blood donors with symptom-free titanium dental implants (closed bar). Reactivity to stimulation with titanium particles in rutile and anatase structures (5 × 10−4 M, 1 × 10−4 M, 5 × 10−5 M) ((a) and (b)), the three titanium metal discs (SBA, MA, and SA) (c) and to the controls (recall antigen) tetanus toxoid (TT) and (pan T cell mitogen) phytohemagglutinin (PHA), over 6 days. Stimulation index (SI) is given as ratio of stimulated culture to unstimulated culture.