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Knee

POSTERIOR TIBIAL SLOPE IS NOT A PREDICTOR OF CONCOMITANT INTRA-ARTICULAR INJURY WITH AN ACL RUPTURE

The British Association for Surgery of the Knee (BASK) May 2022 Meeting, Newport, Wales, 17–18 May 2022.



Abstract

Abstract

Introduction

High posterior tibial slope (PTS) has been recognised as a risk factor for anterior cruciate ligament rupture and graft failure. This prospective randomised study looked at intra-operative findings of concomitant intra-articular meniscal and chondral injuries during a planned ACL reconstruction.

Material and Methods

Prospective data was collected as part of a randomised trial for ACL reconstruction techniques. Intra-operative data was collected and these findings were compared with the PTS measured on plain radiograph by a single person twice through a standardised technique and intra-observer analysis was performed.

Results

49 confirmed ACL rupture patients were in the trial. The average age was 34 (23–66) years and 12 patients were female. 17 patients (34%) had PTS of 12 degrees or more. The intra-observer analysis for PTS measurements in a 2-sided paired T test, showed a mean difference of 0.03 degrees with a P value = 0.83.

23 patients had medial meniscal pathology identified, 15 (65%) had a PTS <12 degrees. 16 patients had lateral meniscus pathology and 9 (56%) had a PTS <12 degrees. Chondral damage did not appear significantly different in the two groups (<12 degrees 15% vs >12 degrees 23%).

Conclusion

In this sample, a PTS >12 degrees was not associated with a higher incidence of meniscal or chondral damage after a confirmed ACL rupture.