BioMimetic Therapeutics Inc. lost millions in the fourth quarter of 2008, falling short of analysts' expectations. The Franklin-based company (Nasdaq: BMTI) reported a net loss of $12.2 million, or 65 cents per share, for the quarter ended Dec. 31, compared to a net loss of $6.9 million, or 37 cents per share, for the same period in 2007.