Research Mentor Name

Vasilios Moutzouros MD

Research Mentor Email Address

Institution / Department

Henry Ford Health

Document Type

Research Abstract

Research Type


Level of Research




The anterior cruciate ligament (ACL) is often debrided during reconstruction (ACLR) to improve visualization. However, remnant ACL tissue contains nerve fibers and including remnant tissue in ACLR could provide benefit. Therefore, a technique was developed that preserves the tibial remnant and incorporates it into ACLR: Hybrid Remnant Preservation Reconstruction (HRPR) ACLR. This study compares HRPR-ACLR to traditional reconstruction by comparing patient reported outcomes and complications.


Patients presenting to one surgeon's clinic with an ACL injury are screened. Exclusion criteria are patient age<14 years, multi-ligament injury, chronic tears, and revision ACLR. Patients are consented and randomized to HRPR or traditional ACLR. Demographics, patient-reported outcomes, range of motion (ROM) and complications were collected.


Thirty-three patients were included, 20 HRPR and 13 controls. No demographic differences were noted. PROMIS-PF, PROMIS-PI, IKDC and PASS scores were equivalent. HRPR reported higher PROMIS-D scores at 6 months (41.90 ± 8.52 vs 34.92 ± 3.33, p=0.009). HRPR demonstrated significantly increased ROM in the affected (137.81 ± 9.69 vs. 127.33 ± 14.82, p=0.05) and unaffected (144.06 ± 9.26 vs 135.25 ± 7.34, p=0.01) legs after 3 months. No ROM difference existed after 6 months in the affected leg (139.0 ± 8.46 vs 131.0 ± 13.42, p=0.07) although a difference existed in the unaffected leg (142.32 ± 8.27 vs 135.62 ± 7.69, p=0.03). Two control group patients suffered complications compared to zero HRPR (p=0.07).


HRPR-ACLR demonstrates similar patient-reported outcomes and significantly increased range of motion without increased complications compared to traditional ACLR after 6 months.


Medical Anatomy | Musculoskeletal, Neural, and Ocular Physiology | Musculoskeletal System | Orthopedics | Sports Medicine