Articles writers needed

I need 15 articles written on a specific topics, for our and about out office, suitable for directory submission written by a professional who understands the basics of SEO. Articles must be between 300 and 600 words in. Articles must adhere to the following guidelines: 1. Be written in a grammatically correct and free-flowing style according to US English. 2. Contain between 15% and 20 % keyword density( easy because you will have to describe spec. subject) 3. The keywords I will provide or from our web site, you need to be used in a normal and conversational way throughout the articles. The keyword needs to be in the article title, first sentence. 4. Article body must be at least 300 words in length and no more than 600 words in length. 5. Be submitted in .txt format. 6. Be completely original, no plagiarism please (I will check each article). In accepting this contract, you are providing “work made for hire”. In other words, the buyer (me) and only the buyer will own the copyright and all rights to the work. You may not publish the work in any way. Please do not apply unless you agree to this stipulation. Please include at least one sample piece with your bid which represents the quality of work that I can expect for this project. We can provide a refference materials on request. The topics are: [login to view URL] Whitening, [login to view URL] Dentistry [login to view URL] Implants [login to view URL] Veneers [login to view URL] in Dentistry [login to view URL] Root canal [login to view URL] Treatments [login to view URL] for Wedding Day [login to view URL] smile key to job interview [login to view URL] smile key to dating [login to view URL] and Dentistry 12 Dentistry for Woman [login to view URL] for Man [login to view URL] dentistry [login to view URL] Invisalign