Outcomes of All inside ACL Reconstruction Technique in Young Patients Sana Ullah*, Waqas Haleem, Muhammad Waqar, Muhammad Saeed, Israr Ahmad and Mohammad Arif khan Department of Orthopedic and Spine Surgery, Pakistan Introduction Anterior cruciate ligaments have been known for almost 2,000 years and were first named by Claudius Galen of Pergamon. Anterior Cruciate Ligament (ACL) is small band inside the knee joint spanning from femur to tibia and act as internal stabilizer, preventing hyperextension, anterior tibial translation and internal tibial rotation giving knee a rotational stability. Study has shown that ACL carries mechanoreceptors that are sensitive to change in direction of movement, position of the knee joint, changes in acceleration, speed, and tension [1]. The two components of ACL are anteromedial (AM bundle) and Posterolateral (PL bundle). ACL is the most commonly completely injured structure in knee joint with annual incidence of 1/3000, resulting in 175000 ACL injuries per year in US. A torn Anterior Cruciate Ligament (ACL) usually occurs as a result of an acute noncontact deceleration injury, forceful hyperextension, or excessive rotational forces about the knee [2-3]. Complete ACL disruption typically results in dynamic knee instability or the inability to respond to quick changes in position [4]. Anterior Cruciate Ligament (ACL) injury occurs most commonly in the patients involved in sports activity or Motor Vehicle Accidents (MVA). ACL deficient knee is found to have an increased rate of secondary meniscus injury and chondral degeneration [5-9]. There is a tenfold increase in the incidence of knee osteoarthritis after ACL tear as a natural course [10]. More than fifty percent of patients with an ACL injury will develop symptomatic osteoarthritis in the following ten to twenty years [11]. To improve knee functions and stability ACL reconstruction is gold standard surgery today. It helps to reduce progression of osteoarthritis but will not restore all knee functions as compared to uninjured knee as there are a lot of factors that play a complex role in the development of osteoarthritis changes like male gender, high BMI, time from injury to ACL reconstruction, presence of cartilage degeneration at the time of surgery and reconstruction technique [12]. Since the advent of using the arthroscope to treat Anterior Cruciate Ligament (ACL) tear, there has been a steady focus on limiting the number and extent of incisions used in ACL reconstruction surgery. Operative techniques evolved from two incisions using outside-in drilling of the femoral and tibial tunnels to an inside-out method of drilling the femoral socket, Crimson Publishers Wings to the Research Research Article *Corresponding author: Sana Ullah, Department of Orthopedic and Spine surgery, Pakistan Submission: April 05, 2021 Published: April 20, 2021 Volume 8 - Issue 2 How to cite this article: Sana Ullah, Waqas Haleem, Muhammad Waqar, Muhammad Saeed, Israr Ahmad,d Mohammad Arif khan. Outcomes of All Inside ACL Reconstruction Technique in Young Patients. Ortho Res Online J. 8(2). OPROJ. 000682. 2021. DOI: 10.31031/OPROJ.2021.08.000682 Copyright@: Sana Ullah, This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use and redistribution provided that the original author and source are credited. ISSN: 2576-8875 Orthopedic Research Online Journal 838 Abstract The aim of this study is to assess the functional outcomes of all-inside technique for Anterior Cruciate Ligament Reconstruction (ACLR) using semitendinosus autograft, in young patients group. Method: 40 patients were included in our study, which had anterior cruciate ligament complete tear, resulting in knee instability and pain, for which they underwent all-inside anterior cruciate ligament reconstruction, in which semitendinosus autograft was used for reconstruction, with at least 1 year of follow-up and minimum of 4 weeks of physiotherapy postoperatively. Results: Early retune to work, load bearing along with subjective score were assessed. Mean VAS score improved from 9.2 to 1.2, mean IKDC improved from 43 to 96 while Lysholm score improved from 62 to 96 in 16 months post-surgery. Lachman test was negative in 96% of patient’s postoperatively. Patients returned to work and started weight bearing fairly early (on 14th post surgery day) Conclusion: All inside ACL reconstruction using semitendinosus autograft has good results in terms of subjective and objective outcomes in young patients. Further studies are needed to compare all inside technique with standard ACL reconstruction. Keywords: All inside ACL reconstruction; ACL reconstruction