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The 800-lb dental benefits gorilla will become the 825-lb dental benefits gorilla this year, as the San Francisco-based holding company system that includes Delta Dental of California and Pennsylvania, as well as affiliates in a total of 16 states-plus the District of Columbia-reports that more than a million new enrollees will join in 2007, based on new sales in 2006 combined with first-quarter sales in 2007.