First Quarter 2013 Highlights First quarter revenue totaled $24.8 million, a 26% increase over the same period in 2012 Five RIO® systems sold in the first quarter, increasing worldwide commercial installed base to 161 RIO systems and domestic commercial installed base to 156 RIO systems 2,988 MAKOplasty® procedures performed in the first quarter, a 30% increase over the same period in 2012 Six MAKOplasty Total Hip Arthroplasty (THA) applications sold in the first quarter, of which one was sold to an existing customer As of March 31, 2013, 63% of worldwide commercial installed base is MAKOplasty THA enabled FORT LAUDERDALE, Fla., May 7, 2013 (GLOBE NEWSWIRE) -- MAKO Surgical Corp. (Nasdaq:MAKO), a medical device company that markets its RIO® Robotic Arm Interactive Orthopedic surgical platform, MAKOplasty® joint specific applications and proprietary RESTORIS® implants that together enable orthopedic surgeons to consistently, reproducibly and precisely treat patient specific osteoarthritic disease, today announced its operating results for the quarter ended March 31, 2013. Recent Business Developments RIO Systems – Five RIO systems were sold during the first quarter to domestic customers. These five RIO systems bring MAKO's worldwide commercial installed base of RIO systems to 161 systems and domestic commercial installed base to 156 systems as of March 31, 2013. At the end of the quarter, MAKO had 154 MAKOplasty sites worldwide. In addition, the revenue associated with two previously deferred international commercial system sales was recognized in the first quarter as all revenue recognition criteria were satisfied. Six MAKOplasty THA applications were sold, five of which were sold with the domestic RIO systems sales during the quarter and one of which was sold as an upgrade to an existing customer with a knee-only commercial system. As of March 31, 2013, 102 RIO systems, or 63% of the worldwide commercial installed base, have the MAKOplasty THA application. MAKOplasty Procedure Volume – During the first quarter, 2,988 MAKOplasty procedures were performed, of which 2,861 were performed at domestic sites. Of the 2,988 procedures, 467 were THA procedures. The 2,988 MAKOplasty procedures performed represent a 3% increase over the procedures performed in the fourth quarter of 2012 and a 30% increase over the procedures performed in the first quarter of 2012. The average monthly utilization per site was 6.6 procedures during the first quarter of 2013. Through March 31, 2013, approximately 26,000 procedures had been performed since the first procedure in June 2006. Clinical Research and Marketing – At the 2013 American Academy of Orthopedic Surgeons in March 2013, Dr. Mark Blyth presented the initial results of the first 100 patients from the prospective, single center, randomized controlled trial (RCT) performed at the Glasgow Royal Infirmary with the University of Strathclyde. The RCT compares the MAKOplasty unicompartmental knee arthroplasty performed with MAKO's RESTORIS MCK implants to manually placed Biomet Oxford® implants. MAKOplasty resulted in significantly lower post-operative pain from day one to eight weeks post-op and it took eight weeks for Oxford patients to reach the lower pain levels that MAKOplasty patients were already reporting after six days. MAKOplasty also demonstrated higher accuracy in all dimensions measured, with statistically significant differences in four of the six dimensions. Finally, a significantly higher percentage of MAKOplasty patients had "Excellent" American Knee Society Scores at three months. Patent Infringement Actions – On April 16, 2013, MAKO agreed to settle all patent infringement actions against Stanmore Implants Worldwide Limited and affiliated entities. Under a confidential settlement agreement and an asset purchase agreement between the parties, in exchange for a cash payment to Stanmore, MAKO withdrew all legal actions against Stanmore and received Stanmore's robotic business assets and related intellectual property, as well as Stanmore's agreement to withdraw from robotics. "The first quarter is typically a slower quarter for MAKO, and our first quarter results were in line with our expectations," said Maurice R. Ferré, M.D., President and Chief Executive Officer of MAKO. "The initial results of our programs designed to drive utilization and system sales are encouraging, and I remain confident in our outlook for 2013."