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Bone Joint J. 2013 Sep;95-B(9):1201-3. doi: 10.1302/0301-620X.95B9.31775.

The effect of the posterior slope of the tibial plateau osteotomy with a rotational error on tibial component malalignment in total knee replacement.

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  • 1Chiba Rehabilitation Center, Department of Orthopaedic Surgery, 1-45-2 Hondacho, Midori-ku, Chiba, Japan.


We performed a CT-based computer simulation study to determine how the relationship between any inbuilt posterior slope in the proximal tibial osteotomy and cutting jig rotational orientation errors affect tibial component alignment in total knee replacement. Four different posterior slopes (3°, 5°, 7° and 10°), each with a rotational error of 5°, 10°, 15°, 20°, 25° or 30°, were simulated. Tibial cutting block malalignment of 20° of external rotation can produce varus malalignment of 2.4° and 3.5° with a 7° and a 10° sloped cutting jig, respectively. Care must be taken in orientating the cutting jig in the sagittal plane when making a posterior sloped proximal tibial osteotomy in total knee replacement.


Alignment; Posterior slope; Proximal tibial osteotomy; Rotational error; Total knee arthroplasty

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