• Martin Panzica, Eduardo M Suero, Mohamed Omar, Philipp Bretin, Christian Krettek, and Musa Citak.
• Trauma Department, Hannover Medical School, Hannover, Germany.
• Technol Health Care. 2014 Jan 1;22(1):115-21.

BackgroundArticular fracture reduction control remains a challenge even with the development of computer-assisted surgery. The Kyphoplasty procedure has shown advantages in treating vertebral fractures. One case report showed successful reduction of acetabular fractures using Kyphoplasty.ObjectiveThis study examines the efficacy of this method in reducing depressed tibial plateau fractures.MethodsAn insertion sleeve for the Kyphon balloon that could be calibrated by the navigation system was designed. A total of 30 test series in synthetic bone cubes were performed using fracture instruments of 2.5 mm, 5 mm and 15 mm diameter, respectively, creating three different depression fracture depths (mean 1.87 mm, 4.2 mm and 1.72 mm, respectively). The Kyphon balloon was used to attempt reduction of each fracture. The same setup was used for testing in five cadaveric tibia specimens.ResultsAfter reduction, there was a remaining depression depth mean in the synthetic bone of 0.27 mm for the 2.5 mm instrument; 2.1 mm for the 5 mm instrument; and 1.72 mm for the 15 mm instrument. We could not adequately reduce depression fractures in cadaveric testing.ConclusionsThe Kyphon balloon was accurately placed with the aid of navigation. The depth was the decisive factor in the reduction of the fracture and not the diameter. In cadavers, depression fractures greater than 5~mm depth could not be reduced with our setup.

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