2015 ISAKOS Biennial Congress Paper #0

“Does Posterior Slope Lead To PCL Injury In Knee? And Effect Of Posterior Slope On The Outcome Following PCL Reconstruction”?

Silvampatti Ramasamy Sundararajan, MS(Orth), COIMBATORE, TAMILNADU INDIA
S Rajasekaran, MS(Orth),DOrth,DNB,FRCS(Ed),FRCS(Lon),MCh(Liv),PhD, Coimbatore, Tamil Nadu INDIA
Ganga Hospital, COIMBATORE, Tamil Nadu, INDIA

FDA Status Not Applicable

Summary: DECREASED POSTERIOR TIBIAL SLOPE IS ASSOCIATED WITH INCREASED RISK FOR PCL INJURIES AND NEGATIVE IMPACT ON CLINICAL OUTCOME AFTER PCL RECONSTRUCTION AND LEADS TO POSTERIOR LAXITY OF KNEE.

Abstract:

Introduction

Aim

of our study is to evaluate the effect of posterior tibial slope on radiological and functional outcome following PCL reconstruction in Isolated PCL injuries.
And to evaluate the incidence of variation of PTS angle in patients with isolated PCL
injuries and to analyze the effect of Posterior Tibial Slope Angle on radiological and
functional Outcome of PCL Reconstruction.

Methods

In our retrospective study, we included 171 patients of isolated PCL injuries to evaluate the incidence of variation of PTS angle, among these 60 patients were PCL Tears and 111 patients were PCL Avulsions. These 60 PCL Tears patients who
underwent Isolated PCL reconstruction were grouped into Group-A (PTS < 70) and group-B
(PTS = 70) based on PTS angle, taking 70 as threshold value. These two groups were
compared to evaluate and analyse the effect of PTS angle on radiological outcome at 6-
months and 1-year, and functional outcome using IKDC and Tegner Lysholm score, knee
Range of motion at 6-months, 1-year, and mean follow-up.

Results

In our study we found that, mean PTS angle was 6.640 ± 2.70, 62 % of patients with
Isolated PCL injury had PTS of < 70. On comparison between Group-A and group-B
population, we found that radiological posterior laxity at 1 year was more in group-A as
compared to Group-B which was statistically significant. Functional outcome with IKDC and
Tegner Lysholm showed lower scores in group-A as compared to group-B at mean final
follow-up and group-A patients had decreased range of movements compared to Group-B at
1 year and mean follow-up, and the difference was statistically significant.

Conclusion

Decreased posterior tibial slope is associated with increased risk for PCL
injuries. And Decreased PTS has negative impact on clinical outcome after PCL
reconstruction and leads to posterior laxity of knee.

Key words: PCL, Posterior slope, Posterior cruciate ligament, Knee ligament