As everyone mentioned earlier, the visual aspect is not very appealing. The content itself seems useful and a basis for a good forum. Why don't you put easy links on the top to immediately direct the viewers to the section they're most interested in. For example: General information, rules and regulations, dentistry, Rss feeds, etc.
I agree that the colour scheme doesn't seem to fit the target audience. Also, the English needs to be improved if you want the site to be taken seriously