Patellofemoral Update
Patellofemoral Update
September 10, 2019
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Accurate angle placement may be achieved for tibial tubercle osteotomy without calibrated guides

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According to a recently published study, high accuracy of the preoperatively planned osteotomy angle for anteromedialization tibial tubercle osteotomy may be achieved without the use of calibrated guides.

“Our study demonstrated improved accuracy and overall slightly steeper angles than intended, averaging 104.1% of preoperative planning,” the authors wrote. “We believe that good exposure and visualization of the [tibial tubercle] TT intraoperatively are crucial to the precision of the osteotomy cut.”

Researchers evaluated 124 patients who underwent tibial tubercle osteotomy. During preoperative planning, investigators calculated the needed amount of medialization based on the preoperative tibial tubercle-trochlear groove (TT-TG). Two independent reviewers assessed the osteotomy angle with MRI at 12.53 months follow-up and compared it with the preoperatively planned angle.

Results showed postoperative MRI-measured osteotomy angles, on average, were 104.1% of planned angles. Investigators noted the MRI-measured osteotomy angles showed a high intraclass correlation coefficient of 0.87. Accuracy of the osteotomy cut did not vary compared with the planned steepness of the cut. – by Monica Jaramillo

 

Disclosures: The authors report no relevant financial disclosures.