Tibial Slope ACL Graft vs Primary Tear

Authors:

Robert S. Dean, MD, Nicholas N. DePhillipo, PhD, ATC, OTC, and Robert F. LaPrade, MD, PhD
Investigation performed at Twin Cities Orthopedics, Edina, Minnesota, USA

Abstract:

Background:

Increased posterior tibial slope (PTS) is a risk factor for anterior cruciate ligament (ACL) rupture and failure of ACL reconstruction (ACLR) grafts.

Purpose:

The purpose was to conduct a systematic review of literature on PTS measurements and to conduct a meta-analysis of comparable PTS measurements based on a patient’s ACL status. It was hypothesized that patients with torn ACLR grafts would have significantly larger medial and lateral PTS compared with patients with native ACLs or those who underwent primary ACLR.

Study Design:

Systematic review; Level of evidence, 4.

Methods:

A systematic review was performed using PRISMA (Preferred Reporting Items for Systematic Reviews and Meta Analyses) guidelines. Included were studies that reported medial and/or lateral PTS measurements, those that reported PTS measurements based on ACL status (ie, intact ACL, primary ACL tear, failed ipsilateral ACLR, or revision ACLR), and those that reported their specific PTS measurement technique. Average PTS measurements, measurement location (medial or lateral tibial plateau) and technique, imaging modality used, and ACL status were extracted from each study. Data were pooled using Der Simonian and Laird random-effects models, and results were compared using the Altman interaction test. Results: The literature search identified 1705 studies, of which 82 (N ¼ 12,971 patients) were included. There were 4028 patients in the intact ACL group (31%), 7405 in the primary ACLR group (57%), and 1538 in the failed ACLR group (12%). Measurements were obtained from lateral radiographs in 31 studies (38%), from magnetic resonance imaging in 47 studies (57%), and from computed tomography in 4 studies (5%). The failed ACLR group had a significantly larger lateral PTS (9.55; 95% CI, 8.47-10.63) than either the primary ACL tear (7.13; 95% CI, 6.58-7.67) or intact ACL (5.57; 95% CI, 5.03-6.11) groups (P < .001 for both). The failed ACLR group also had a significantly larger medial PTS (9.05; 95% CI, 7.80-10.30) than the primary (6.24; 95% CI, 5.71-6.78) or intact ACL (6.28; 95% CI, 5.21-7.35) groups (P < .001 for both).

Conclusion:

Both lateral and medial PTS measurements were greater in patients who had failed previous ACLR than those with a primary ACL tear or an intact native ACL. The lateral PTS of patients with primary ACL tears was greater than those with an intact native ACL

You may download the study: Posterior Tibial Slope in Patients With Torn ACL Reconstruction Grafts Compared With Primary Tear or Native ACL

Robert LaPrade, MD PhD

Average rating:

26 reviews

Sue Stanek

Jan 2, 2020

by Sue Stanek on Robert LaPrade, MD PhD

So glad I waited for the best

I struggled with my knee for 18 months - having gone from 10,000 steps a day to only walking as needed. Previous attempts to make it better provided only temporary relief. (including injections and arthroscopic surgery), I heard Dr. La Prade was going to practice in the Twin Cities - where I live, & waited for him, based on his renown reputation. I am so glad I did! Dr LaPrade performed a deep root repair to my meniscus, which saved me from a knee replacement at this time. I am 5-months post surgery, and am doing great, stationary biking and exercising every day, no pain.
You know you are seeing the best when you find out he has written over 500 medical journal articles - among many other accomplishments. Hey - if he is good enough for Olympic and professional athletes…..he's good enough for me! Thank you, Dr. LaPrade, for treating me with the care, focus, and expertise as if I was an Olympic athlete!
- From your 63 year old very appreciative patent ~

Nancy S Stevenson

Aug 14, 2019

by Nancy S Stevenson on Robert LaPrade, MD PhD

Right Knee Surgery After Auto Bicycle Accident

Dr. Robert F. LaPrade operated on my right knee in May of 2010. I was hit by a car on my bicycle near Horsetooth Reservoir in CO. I was life flighted to MCR in Loveland, CO. My orthopedic injuries were severe, but totally missesd by the orthopedic team at Poudre. I could not bear weight on my right side though I tried repeatedly, but finally I went and got an MRI and one of the orthopedic surgeons that I worked with was shocked when he saw the MRI result. My right knee was totally destroyed; ACL, MCL, PCL all severely torn; the patella was the only thing intact in my right knee. Dr. La Prade had just moved to Vail and I was his 2nd patient @ The Steadman Clinic. I was told by one of the orthopedic surgeons that I worked with that I would never run again and would be lucky if I could ever hike again. This was devastating news after being a top triathlete (3rd in the world in my age group in 1989 & 1st nationally in my age group) and a big marathon runner. All I can say is Dr. La Prade did an amazing job and I am not limited in any of my activites. I can run, bike, & climb mountains. In fact 2 years ago I finished climbing the top 100 peaks in CO.

Jordan

Aug 2, 2019

by Jordan on Robert LaPrade, MD PhD

Very helpful

I have looked many times for answers on my tibial tubercle osteotomy and never found any as detailed as i needed. This answers all my questions!