iBalance Medical (Boulder) is developing an improved method for completing an orthopedic surgical procedure called high tibial osteotomy. The company provides the surgical tools and implant for this knee malalignment corrective surgery. Back in October of 2005 I wrote about the $8.24M first tranche (here). The company has recently announced a second $5.26M tranche (also mentioned on my other blog OnBioVC here, yet another shameless self plug) bringing the total raised to $13.5M. Well done!