LOS ANGELES, CA--(Marketwire - November 11, 2008) - Discus Dental, LLC, innovators in dental and oral-hygiene products and the worldwide leader in professional tooth whitening products, today announced the appointment of its new Chief Executive Officer, Steven J. Semmelmayer. Following an exhaustive search, Discus Dental has executed an employment agreement to bring Semmelmayer on board, effective immediately. As a 29-year veteran of the dental industry, he has risen through the ranks of sales and marketing, product development and general management.