Figure 11. Enhancement of collagen synthesis following photosensitization

Collagen synthesis was increased with light and PP IX exposure when compared to cells exposed to PP IX and dark (p=0.0004), controls in light (p=0.003) and controls in dark (p=0.003; Figure 10). The use of a blue light filter eliminated radiation below 450 nm. Total energy delivered remained the same by increasing intensity irradiation of longer wavelengths.