LONG ISLAND CITY, N.Y.--(BUSINESS WIRE)--Sirona (Nasdaq: SIRO), one of the leading global manufacturers of high-quality dental equipment and technologies, today announced that it will release its financial results for the quarter ended March 31, 2009 on Tuesday, May 5, 2009 before the market opens and hold its conference call later that morning, commencing at 8:30 a.m. ET.