2017 ISAKOS Biennial Congress ePoster #1152


Increased Laxity With Hamstring Autograft Compared To Patellar Tendon Autograft; A Prospective Cohort Study Of 5462 Patients With Primary Acl Reconstruction

Riccardo Cristiani, MD, PhD, Stockholm SWEDEN
Vasileios Sarakatsianos, MD, Stockholm SWEDEN
Bjorn Engstrom, MD, PhD, Assoc. Prof., Spanga SWEDEN
Magnus Forssblad, MD, PhD, Stockholm SWEDEN
Anders Stalman, MD, PhD, Saltsjöbaden SWEDEN

Stockholm Sports Trauma Research Center,Capio Artro Clinic, Sophiahemmet, Stockholm, Sweden, Stockholm, SWEDEN

FDA Status Not Applicable


Acl reconstruction with Hamstring tendons autograft has increased laxity compared to Patellar tendon autograft, but better subjective outcome measures at short follow-up. The amount of anterior knee laxity doesn't affect the subjective outcomes for both grafts.



To analyse differences in knee laxity after ACL reconstruction with BPTB or HT autografts and secondarily to explore whether graft choice or the amount of laxity affect the subjective knee outcome measures.


A total of 5,462 primary ACL reconstructions, including 692 BPTB autografts and 4770 HT autografts, performed at Capio Artro Clinic, Stockholm, Sweden from 2000 to 2015, were identified in our local database. 6 months after surgery anterior knee laxity was measured using KT-1000 arthrometer. At 1 year follow-up all patients completed questionnaires with an evaluation of subjective knee function, the Lysholm functional score, the KOOS and EQ-5D index.


Both graft groups improved the anterior knee laxity significantly (p < 0,0001), but the BPTB group had significant better improvement of joint laxity when compared with the HT group (p < 0,0001). No significant differences were found between the groups regarding the Lysholm functional score and the EQ-5D index. A significant statistical difference was found in favor of HT autograft for all KOOS subscales, except for the Symptoms subscale. No correlation exists between the amount of anterior knee laxity and KOOS at 1y.


HT autograft is inferior to BPTB autograft with respect to resuming anterior stability. Both grafts improve significantly the subjective outcomes, but HT autograft shows better KOOS values in almost all subscales at short term follow-up. The subjective outcome is not affected by the amount of anterior knee laxity.