AstraZeneca is reviewing bids for its dental implant unit Astra Tech. "We have received a number of bids and we're looking at them and reviewing them. Once we have done that, we'll decide if and how we are going to sell it," AstraZeneca spokeswoman Ann-Leena Mikiver told Dow Jones, adding that the company may choose not to sell. Permira, Bain Capital, Nordic Capital, Cinven, Bridgepoint and Warburg Pincus are among the private equity firms that submitted bids by the first-round deadline on March 14, sources report. Swiss dental implant makers Straumann Holding AG and Nobel Biocare Holding AG, as well as big U.S. names like Medtronic, 3M, Danaher and Dentsply International may also be interested. Report