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Skeletal Radiol 2020 May 29. Epub 2020 May 29.

Stoke Mandeville Hospital, Buckingahmshire Healthcare NHS Trust, Aylesbury, UK.

Objective: To delineate the spectrum of traumatic knee injuries associated with injury of the anterolateral ligament of the knee (ALL).

Materials And Methods: A retrospective review of 200 MRI scans undertaken for acute knee trauma was performed. In each scan, the ALL was scored as normal, sprained or torn. Read More

Am J Sports Med 2020 Jun 8;48(7):1673-1681. Epub 2020 May 8.

Department of Orthopaedic Surgery, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea.

Background: The incidence of meniscocapsular junction tears of the medial meniscus posterior horn, known as , is reported to be 9.3% to 23.9%. Read More

J Orthop Surg Res 2020 Apr 25;15(1):160. Epub 2020 Apr 25.

, Yakima, USA.

Background: To investigate differences in the tibial tubercle-trochlear groove (TT-TG) and patellar tendon-posterior cruciate ligament (PT-PCL) distances in symptomatic patients with non-contact internal knee derangements (IKD) and symptomatic patients with internally intact knees (control).

Methods: A retrospective review of MRI studies was completed by comparing 78 patients with meniscal and ligamentous derangements of the knee to 63 internally intact knees (age range, 13 to 50 years). MRI findings were reviewed independently by two board-certified radiologists to assess for agreement. Read More

J Family Med Prim Care 2020 Feb 28;9(2):1154-1159. Epub 2020 Feb 28.

Department of Radiology, Faculty of Medicine, Taibah University, Almadinah Almunawwarah, Kingdom of Saudi Arabia.

Objective: This study aimed to assess the meniscus and cruciate ligament lesions of the knee using magnetic resonance imaging (MRI) and to investigate the correlation between clinical and MRI diagnoses.

Patients And Methods: Herein, we reviewed the electronic medical records of 240 patients who underwent knee MRI. The images were evaluated and then the clinical and MRI diagnoses were compared. Read More

Orthop J Sports Med 2020 Apr 15;8(4):2325967120911162. Epub 2020 Apr 15.

Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.

Background: Bone bruises observed on magnetic resonance imaging (MRI) after an anterior cruciate ligament (ACL) injury could provide significant information about ACL injury mechanisms.

Purpose/hypothesis: The purpose of this study was to investigate common bone bruise patterns after an ACL injury. It was hypothesized that the most common bone bruise distribution pattern would be only the lateral side of both the femur and tibia. Read More

J Orthop Res 2020 Apr 8. Epub 2020 Apr 8.

Icometrix, Leuven, Belgium.

Diffusion tensor imaging (DTI) provides information about tissue microstructure and its degree of organization by quantifying water diffusion. We aimed to monitor longitudinal changes in DTI parameters (fractional isotropy, FA; mean diffusivity, MD; axial diffusivity, AD; radial diffusivity, RD) of the anterior cruciate ligament (ACL) following primary repair with internal bracing (IBLA). Fourteen patients undergoing IBLA were enrolled prospectively and scheduled for clinical follow-up, including instrumented laxity testing, and DTI at 3, 6, 12, and 24 months postoperatively. Read More

Arthroscopy 2020 06 13;36(6):1679-1686. Epub 2020 Feb 13.

Hospital Sírio-Libanês, Faculty of Medicine, Institute of Orthopedics and Traumatology, University of São Paulo, São Paulo, Brazil; Knee Surgery Division, Faculty of Medicine, Institute of Orthopedics and Traumatology, University of São Paulo, São Paulo, Brazil.

Purpose: To evaluate the magnetic resonance imaging (MRI) characteristics of Segond fractures, including the structures attached to the avulsed fragment, the integrity of anterolateral ligament (ALL) and iliotibial band (ITB), and fragment size and location.

Methods: This was a retrospective, cross-sectional study with MRI scans from 2016 to 2019 with the term "Segond" in the reports, signs of acute trauma, and a bony anterolateral tibial avulsion (Segond) fracture. Two experienced observers accessed images to evaluate fragment dimensions (anteroposterior, mediolateral, and craniocaudal) and distances from anatomic landmarks (Gerdy's tubercle, articular surface, and posterolateral tibial corner). Read More

Am J Sports Med 2020 03 14;48(4):838-846. Epub 2020 Feb 14.

Sports Medicine Service, Beijing Jishuitan Hospital, Beijing, China.

Background: The lateral meniscus posterior root (LMPR) lesion further decreases dynamic knee stability after anterior cruciate ligament (ACL) injury owing to the loss of the "wedge effect" maintained by the posterior horn of the lateral meniscus. However, the effect of LMPR lesions on the static tibiofemoral relationship in extension after ACL injuries is not determined.

Purpose: To (1) determine the effect of LMPR lesions on anterior tibial subluxation of the lateral compartment (ATSLC) in extension in patients with ACL injuries and to (2) identify the LMPR-related factors associated with excessive ATSLC in extension. Read More

Knee Surg Sports Traumatol Arthrosc 2020 Feb 12. Epub 2020 Feb 12.

Department of Orthopaedic Sports Medicine, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany.

Purpose: The purpose of this study was to evaluate the clinical and radiological outcomes of acute posterior cruciate ligament (PCL) lesions in multiple injured knees that were surgically treated with internal bracing.

Methods: Acute complete PCL lesions in multiple injured knees with subsequent internal-bracing treatment within 21 days between 2014 and 2016 were eligible for inclusion. At final follow-up, patients were assessed with Tegner, Lysholm, and IKDC scores. Read More

Am J Sports Med 2020 03 6;48(3):573-580. Epub 2020 Feb 6.

Sports Medicine Service, Beijing Jishuitan Hospital, Beijing, China.

Background: Anterior tibial subluxation (ATS) in extension after anterior cruciate ligament (ACL) injury highlights an increased anterior position of the tibia relative to the femur. Recent studies demonstrated that subluxation is sometimes irreducible and the normal tibiofemoral relationship is not restored by ACL reconstruction (ACLR), which raises concerns regarding clinical outcomes after ACLR.

Hypothesis: Excessive preoperative ATS in extension is associated with inferior knee stability after anatomic ACLR. Read More

Skeletal Radiol 2020 May 25;49(5):677-689. Epub 2020 Jan 25.

University of Miami Sports Medicine Institute, 5555 Ponce de Leon Blvd, Coral Gables, FL, 33146, USA.

Background: Meniscal ramp lesions have been defined as longitudinal vertical peripheral tears of the medial meniscus involving the posterior meniscocapsular ligament, meniscotibial ligament, and/or the red-red zone of the posterior horn. They are heavily associated with anterior cruciate ligament injuries, and because of their potentially important biomechanical role in knee stabilization, injuries to this region may require surgical repair. However, due to their location and lack of general knowledge regarding their different types and associated appearances on magnetic resonance imaging, ramp lesions are routinely underreported. Read More

Sports Med Arthrosc Rev 2020 Mar;28(1):2-7

Pan Am Clinic, Winnipeg, MB, Canada.

Isolated posterior cruciate ligament (PCL) injuries are uncommon and can be easily missed with physical examination. The purpose of this article is to give an overview of the clinical, diagnostic and arthroscopic evaluation of a PCL injured knee. There are some specific injury mechanisms that can cause a PCL including the dashboard direct anterior blow and hyperflexion mechanisms. Read More

Acta Med Okayama 2019 Dec;73(6):495-501

Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan.

Medial meniscus posterior root tear causes rapid knee cartilage degradation by inducing posteromedial displacement of the medial meniscus. We evaluated medial meniscus posterior extrusion before and after pullout repair for medial meniscus posterior root tear using magnetic resonance images. Twenty-eight patients with symptomatic medial meniscus posterior root tear were included. Read More

Medicine (Baltimore) 2019 Dec;98(50):e18376

Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, China.

Rationale: Medial collateral ligament (MCL) injury is a common sports injury. The damage mainly occurs in ligament fibers, but MCL avulsion fracture is extremely rare and only a few reports have been published.

Patient Concerns: Herein, we present a healthy 21-year-old man with an avulsion fracture of the MCL of the right knee sustained during snowboarding. Read More

Surg Technol Int 2020 May;36:309-316

Department of Radiology, Antwerp University, Hospital and University of Antwerp, Edegem, Belgium.

Purpose: This paper describes technical difficulties and outcomes for the first 15 patients treated with Dynamic Intraligamentary Stabilization (DIS) for anterior cruciate ligament (ACL) repair.

Methods: The first 15 patients treated with DIS were included. To optimize the inclusion process, a new pre-operative pathway was developed. Read More

Int J Surg Case Rep 2019 19;65:339-343. Epub 2019 Nov 19.

Hamad Medical Corporation, Hamad General Hospital, Al Rayan Road, Doha, P.O Box 3050, Qatar.

Introduction: Meniscal tears are common knee injuries that occur in different populations and particularly among athletes. Either isolated or accompanied with anterior cruciate ligament injury, meniscal tears can be a source of significant knee pain, locking and instability. Different patterns of meniscal tears are described radiologically and arthroscopically, however displacement of the torn part of the meniscus can cause characteristic appearance on MRI. Read More

J Orthop Res 2020 04 19;38(4):759-767. Epub 2019 Nov 19.

Department of Biomechanics, Hospital for Special Surgery, New York, New York.

Combined injury to the anterior cruciate ligament (ACL) and meniscus is associated with earlier onset and increased rates of post-traumatic osteoarthritis compared with isolated ACL injury. However, little is known about the initial changes in joint structure associated with these different types of trauma. We hypothesized that trauma to the ACL and lateral meniscus has an immediate effect on morphometry of the articular cartilage and meniscus about the entire tibial plateau that is more pronounced than an ACL tear without meniscus injury. Read More

BMC Musculoskelet Disord 2019 Nov 7;20(1):521. Epub 2019 Nov 7.

Department of Orthopaedic Surgery, West China Hospital, Sichuan University, No. 37, Guoxue Alley, Chengdu, 610041, People's Republic of China.

Background: The killer turn has been documented as the primary drawback of posterior cruciate ligament (PCL) reconstruction. Fanelli advocated placing the tibial tunnel outlet in the inferior lateral part of the PCL fovea to reduce the killer turn. This study aimed to confirm the validity of Fanelli's viewpoint regarding PCL reconstruction technique and to assess the specific Fanelli tunnel area on the inferior lateral part of the PCL fovea. Read More

Am J Sports Med 2019 12 24;47(14):3365-3372. Epub 2019 Oct 24.

Department of Orthopaedics, Bürgerspital Solothurn, Solothurn, Switzerland.

Background: Although the femoral tunnel position is crucial to anatomic single-bundle anterior cruciate ligament (ACL) reconstruction, the recommendations for the ideal femoral footprint position are mostly based on cadaveric studies with small sample sizes, elderly patients with unknown ACL status, and 2-dimensional techniques. Furthermore, a potential difference in the femoral ACL footprint position and ACL orientation between ACL-ruptured and ACL-intact knees has not been reported in the literature.

Hypothesis: The femoral ACL footprint position and ACL orientation vary significantly between ACL-ruptured and matched control ACL-intact knees. Read More

Arthroscopy 2019 10;35(10):2909-2915

Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, U.S.A.. Electronic address:

Purpose: To comparatively evaluate the clinical outcomes and rates of recurrent instability in young patients with primary medial patellofemoral ligament (MPFL) repair or reconstruction, as well as to assess for radiologic risk factors for worse outcomes.

Methods: A retrospective review identified all patients with lateral patellar instability who underwent either MPFL repair and/or imbrication or MPFL reconstruction without any additional osseous procedures between 2008 and 2015 at a single center. Demographic variables and preoperative magnetic resonance imaging were analyzed, and Kujala scores were obtained at a minimum 2-year follow-up. Read More

J Orthop Case Rep 2019 ;9(3):90-92

Department of Clinical Research Development Center, Firoozgar Hospital, Iran University of Medical Science, Tehran, Iran.

Introduction: Reverse Segond fracture is a cortical avulsion fracture off the medial tibial plateau of the knee, associated with tears of the posterior cruciate ligament (PCL), medial collateral ligament (MCL), medial meniscus, and probably the anterior cruciate ligament (ACL). Unlike Segond fracture, it is a very rare injury of the knee.

Case Report: Case one is a 24-year-old male with left tibial plateau and reverse Segond fracture with an magnetic resonance imaging (MRI) showing MCL avulsion, medial meniscus entrapped in fracture site and ACL tear but intact PCL. Read More

Am J Sports Med 2019 11 12;47(13):3181-3186. Epub 2019 Sep 12.

Orthopaedic and Traumatology Unit, Ospedale Regionale di Lugano, Ente Ospedaliero Cantonale, Lugano, Switzerland.

Background: Bone bruise characteristics after anterior cruciate ligament (ACL) injury have been correlated with the level of joint derangement in adults. However, the literature lacks information about younger patients, whose higher ligamentous laxity may lead to different lesion patterns.

Purpose: To investigate the prevalence, size, location, and role of bone bruise associated with ACL rupture in the pediatric population. Read More

Am J Sports Med 2019 10 30;47(12):2888-2894. Epub 2019 Aug 30.

Department of Sports Orthopaedics, Hoshigaoka Medical Center, Hirakata, Japan.

Background: Meniscal function after repair of radial/flap tears of the posterior horn of the lateral meniscus (LM) with anterior cruciate ligament reconstruction (ACLR) has not been comprehensively investigated.

Purpose: To evaluate not only the clinical and radiographic outcomes of patients with repair of radial/flap tears of the posterior LM with ACLR but also the healing status of the repaired meniscus and changes of chondral status with second-look arthroscopy.

Study Design: Case series; Level of evidence, 4. Read More

Eur J Orthop Surg Traumatol 2019 Dec 31;29(8):1749-1758. Epub 2019 Jul 31.

Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan.

Purpose: To determine whether the graft signal intensity of the anteromedial bundle (AMB) on MRI was related to the tibial tunnel placement, anterior-posterior (A-P) stability, and/or cyclops lesion formation following double-bundle (DB) anterior cruciate ligament (ACL) reconstruction.

Methods: Between January 2010 and August 2016, 65 patients underwent arthroscopic DB-ACL reconstruction and were followed up for a minimum of 2 years. Follow-up included 1-week postoperative CT evaluation, 1-year postoperative MRI evaluation, and 2-year postoperative measurement of A-P instability using a KT-2000 arthrometer. Read More

J Clin Orthop Trauma 2019 Jul-Aug;10(4):710-715. Epub 2019 Feb 25.

Department of Orthopedics, Seth GS Medical College and KEM Hospital, India.

Background: The purpose of our study was to compare the significance of the tibio-femoral morphological variables (notch width index, notch shape index, intercondylar notch angle, medial and lateral tibial slopes) in predicting non-contact ACL (anterior cruciate ligament) injuries and to compare these factors between genders in South Asian population. The author hopes to provide a comprehensive analysis on the risk factors which would help in betterment of the patients at danger for anterior cruciate ligament injury.

Materials And Methods: A total of 110 MRI knees of patients with 55 subjects of noncontact ACL injury and 55 age and sex matched controls were included in a retrospective study. Read More

Arthroscopy 2019 07;35(7):2136-2142

University of Miami, Florida, U.S.A.

Purpose: To evaluate the frequency of anterolateral ligament (ALL) injuries in acute anterior cruciate ligament (ACL) injuries in adolescent patients using magnetic resonance imaging (MRI) and characterize other potential intra- and extra-articular knee injuries that are associated with ALL injuries.

Methods: Patients between 14 and 17 years of age with acute ACL injuries (trauma for <3 weeks before examination) were retrospectively evaluated with MRI over 24 months (January 2016-December 2017). Among this population, ALL was classified as not visible, normal, or injured. Read More

Singapore Med J 2019 Jun;60(6):286-290

Department of Diagnostic Radiology, Khoo Teck Puat Hospital, Singapore.

A 21-year-old man presented with left knee pain and instability that persisted three months after a road traffic accident. Physical examination revealed a positive posterior drawer test. Anterior drawer and pivot tests were negative. Read More

Am J Phys Med Rehabil 2020 04;99(4):e46-e49

From the Department of Physical Medicine and Rehabilitation, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania (AS, KO); and Department of Orthopedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania (KO).

A 24-yr-old male soccer player presented with a 7-yr history of left posterior knee "looseness." Evaluation 7 yrs ago, at the time of initial injury, revealed atraumatic anterior and posterior cruciate ligament sprains. On representation, the patient described the pain as a constant, dull ache, 3/10, but his biggest complaint was this feeling of "instability" and looseness where his knee would "buckle" 3-4 times a week. Read More

Beijing Da Xue Xue Bao Yi Xue Ban 2019 Jun;51(3):586-590

Institute of Sports Medicine, Peking University Third Hospital; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China.

Objective: To provide new concepts of anterior cruciate ligament (ACL) reconstruction by anatomical gross observation of ACL tibial insertion and finite element analysis of distribution of ACL mechanical insertion.

Methods: In the anatomical study, ten fresh adult cadaveric knees were dissected, including 6 males and 4 females, all knees were generally observed through standard medial parapatellar approaches, paying attention to the close anatomical relationship of tibial insertion and anterior horn of lateral meniscus, and ACL was exposed and gradually removed from the inside. The shape of tibial insertion of ACL was observed and recorded, and anterior-posterior diameters and left-right diameters of tibial insertion were measured with vernier caliper. Read More

Open Access Maced J Med Sci 2019 May 15;7(9):1486-1493. Epub 2019 May 15.

National Ribat University, Khartoum, Sudan.

Background: Multi-ligament knee injury is the state of having two or more of the major knee ligaments, namely: the anterior cruciate ligament (ACL), the posterior cruciate ligament (PCL), the medial collateral ligament (MCL), the lateral collateral ligament (LCL), the posteromedial corner (PMC), and the posterolateral corner (PLC). The knee is a hinge joint; this dictates two direction movements on the y-axis plane. The knee joints carry the weight load of the body uniquely. Read More

J Exp Orthop 2019 May 28;6(1):22. Epub 2019 May 28.

The Steadman Clinic, Vail, CO, USA.

Background: The diagnosis of incomplete acute and chronic posterior cruciate ligament (PCL) tears can be challenging with conventional magnetic resonance (MR) imaging, particularly for injuries in which the ligament appears continuous as occurs with chronic PCL tears that have scarred in continuity. Quantitative mapping from MR imaging may provide additional useful diagnostic information in these cases. The purpose of this study was to assess the feasibility of quantifying transverse relaxation time (T2) mapping values at 3 Tesla (T) in a prospectively enrolled patient cohort with chronic PCL tears. Read More

Am J Sports Med 2019 07 24;47(8):1825-1830. Epub 2019 May 24.

The Steadman Clinic, Vail, Colorado, USA.

Background: Lateral posterior tibial slope (PTS) has been identified as a risk factor for primary anterior cruciate ligament (ACL) tears.

Purpose/hypothesis: The purpose was to prospectively determine if there was a difference in lateral PTS between male and female athletes sustaining contact ACL tears as compared with a group of sex-, age-, and activity-matched athletes who sustained noncontact ACL tears. It was hypothesized that there would be no difference in degree of lateral PTS between contact and noncontact mechanisms among patients sustaining primary ACL tears in sports. Read More

Skeletal Radiol 2019 Oct 10;48(10):1599-1610. Epub 2019 May 10.

Department of Radiology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, 892 Dongnam-ro, Gangdong-gu, Seoul, 05278, Republic of Korea.

Objective: To evaluate the diagnostic performance of knee ultrasound for anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) injuries.

Materials And Methods: PubMed and EMBASE databases were searched for diagnostic accuracy studies that used ultrasound for diagnosing ACL and PCL injuries. Bivariate and hierarchical summary receiver operating characteristic modeling was used to evaluate diagnostic performance. Read More

Knee Surg Sports Traumatol Arthrosc 2020 Mar 10;28(3):840-854. Epub 2019 May 10.

Department of Orthopaedics and Trauma Surgery, Vienna General Hospital, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.

Purpose: The aim of the current study was (1) to provide an overview of common definitions and classification systems of ramp lesions (RL) and (2) to systematically review the available literature with regard to the diagnosis and treatment of RLs in anterior cruciate ligament (ACL)-deficient knees.

Methods: Following the PRISMA guidelines, MEDLINE and Scopus were searched for articles (1) reporting on acute or chronic ACL injuries, (2) with concomitant medial meniscus injury, (3) located at the posterior meniscocapsular attachment site (and red-red zone). Ex vivo studies, reviews and technical notes were excluded. Read More

Am J Emerg Med 2020 02 25;38(2):237-242. Epub 2019 Apr 25.

Department of Radiology, G SAM Hospital, 591 Gunpo-ro, Gunpo-si, Gyeonggi-do 15839, Republic of Korea; Department of Radiology, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea. Electronic address:

Objective: To evaluate the feasibility of point-of-care knee ultrasonography (POCUS) compared with knee magnetic resonance imaging (MRI) for diagnosing anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) tears in patients with acute knee trauma.

Material And Methods: A prospective study was conducted in a tertiary hospital emergency department; acute (within 1-week) knee trauma patients with suspected ACL or PCL tear were recruited. Two POCUS performers (a board-certified emergency physician and a musculoskeletal radiologist) independently evaluated the ACL and PCL using POCUS. Read More

Eur J Radiol 2019 Jul 22;116:225-230. Epub 2019 Mar 22.

Department of Radiology, Gil Medical Center, Gachon University College of Medicine, 21 Namdong-daero, 774beon-gil, Namdong-gu, Incheon 21565, Republic of Korea.

Objective: The purpose of this article is to assess whether dual-energy CT (DECT) collagen material decomposition technique could reliably depict graft integrity in patients with knee ligament reconstruction.

Methods: Seventy patients (mean age, 29.8 years; age range, 15-57 years; 61 men, 9 women) who underwent knee DECT, from June 2016 to January 2018, after knee ligament reconstruction were included in our study. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Nov 12;27(11):3713-3721. Epub 2019 Apr 12.

Department of Orthopaedic Surgery, Stanford University, 450 Broadway Street, Pavilion C, 4th Floor, Redwood City, CA, 94063-6342, USA.

Purpose: Revision ACL surgery may be complicated by tunnel malposition and/or tunnel widening and often requires a staged treatment approach that includes bone grafting, a period of several months to allow bone graft incorporation and then definitive revision ACL reconstruction. The purpose of this study was to evaluate the results of a single-staged ACL revision reconstruction technique using a cylindrical dowel bone graft for patients who have existing posteriorly placed and/or widened tibial tunnels in the tibia at a minimum of 2 years follow-up.

Methods: Between 2010 and 2014, patients undergoing single-stage revision ACL reconstruction with the described technique were prospectively enrolled and evaluated. Read More

J Orthop Res 2019 08 6;37(8):1730-1742. Epub 2019 May 6.

Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.

The mechanism underlying non-contact anterior cruciate ligament (ACL) injury is multi-factorial and still an object of debate. Computational models, in combination with in vivo and cadaveric studies, can provide valuable insight into the contribution of the different factors involved. The goal of this study was to validate four knee finite element models (two males and two females) to kinematic and strain data collected in vitro with an impact-driven simulator and use them to assess how secondary external knee loads (knee abduction moment [KAM], anterior shear force, and internal rotation torque [ITR]) affect tibiofemoral contact forces and ACL force during impact. Read More

Arthroscopy 2019 04;35(4):1080-1082

Most acetabular labral tears are caused by abnormal osseous morphology, such as cam and/or pincer morphology and dysplasia. There is a high prevalence of asymptomatic cam morphology, pincer morphology, dysplasia, and acetabular labral tears in the general population. The addition of subjective patient symptoms and objective physical examination findings to imaging (plain radiographs, magnetic resonance imaging, and computed tomography) may yield the diagnosis of femoroacetabular impingement syndrome. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Nov 26;27(11):3633-3637. Epub 2019 Mar 26.

Sports Surgery Clinic, Dublin, Ireland.

Purpose: To evaluate whether medial-sided bone bruising was associated with postero-medial meniscal tears in patients with an acute rupture of their anterior cruciate ligament (ACL).

Methods: A retrospective analysis of 150 consecutive patients who had an MRI scan within 8 weeks of their ACL rupture that underwent an ACL reconstruction was performed. Based on the intra-operative findings, two groups were identified: Group A (N = 75) had no postero-medial meniscal tear associated with the acute ACL rupture and Group B (N = 75) had a postero-medial meniscal tear found at time of reconstruction. Read More

Knee Surg Sports Traumatol Arthrosc 2019 Nov 16;27(11):3567-3574. Epub 2019 Mar 16.

Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.

Purpose: Magnetic resonance imaging with T1ρ mapping is used to quantify the amount of glycosaminoglycan in articular cartilage, which reflects early degenerative changes. The purposes of this study were to evaluate early degenerative changes in knees after anterior cruciate ligament (ACL) reconstruction by comparing T1ρ values before and 2 years after surgery and investigate whether surgical factors and clinical outcomes are related to differences in T1ρ values.

Methods: Fifty patients who underwent unilateral primary ACL reconstruction were evaluated using T1ρ mapping before and 2 years after surgery. Read More

J Orthop Surg (Hong Kong) 2019 Jan-Apr;27(1):2309499019834674

2 Middlemore Hospital, Auckland, New Zealand.

Background: Increased lateral tibial posterior slope (LTPS) is associated with higher anterior cruciate ligament (ACL) reconstruction (ACLR) failure rate. Transportal central femoral footprint ACLR is associated with higher failure rate compared to transtibial high anteromedial footprint ACLR due to graft anisometry. The purpose of this study was to investigate whether the influence of tibial slope on ACL graft failure risk is dependent on graft positioning. Read More

Surg Technol Int 2019 May;34:469-475

Department of Orthopaedic Surgery, Antwerp University Hospital, Edegem, Belgium.

Background: A posterior cruciate ligament (PCL) rupture is less common than an anterior cruciate ligament (ACL) rupture. PCL reconstruction remains controversial with variable outcomes and problems. The encouraging results of the novel ACL repair techniques led to renewed interest in PCL repair. Read More

J Surg Orthop Adv Winter 2018;27(4):325-328

Department of Orthopaedic Surgery, University of Illinois at Chicago.

The goal of this study was to define the course of the popliteal artery (PA) and determine any variability among different patient demographics; by identifying risk factors for injury, surgeons can decrease patient morbidity and mortality. Ninety-four adult magnetic resonance imaging studies of the knee were reviewed. In extension, the artery is at most 7. Read More

Chin J Traumatol 2019 Feb 21;22(1):24-28. Epub 2019 Jan 21.

Institute of Sports Medicine, Peking University Third Hospital, Beijing, China. Electronic address:

Purpose: To evaluate the clinical outcome in patients who received anterior cruciate ligament (ACL) reconstruction via anteromedial portal with or without posterior wall blowout.

Methods: Twenty patients with ruptured ACL, who have received ACL reconstruction via anteromedial portal between Apr 2012 and Oct 2013 were enrolled. According to the conditions of posterior wall, the patients were divided into 2 groups: posterior wall blowout group (10 patients) and posterior wall intact group (10 patients). Read More

Arthroscopy 2019 02;35(2):302-303

Centre Orthopédique Santy, Hôpital Privé Jean Mermoz, Groupe Ramsay Générale de Santé, FIFA Medical Center of Excellence, Lyon, France.

In the context of anterior cruciate ligament reconstruction surgery, anterolateral ligament reconstruction is now recognized as a reliable option to control rotatory instability and should be considered in the knee surgeon's modern armamentarium. By highlighting its daily practical application, this infographic presents the indications for this specific additional lateral augmentation, the anatomic and biomechanical principles that underline its rationale, and the clinical outcomes from recent large series. In 2013, Claes et al. Read More

Sports Med 2019 Mar;49(3):453-462

Division of Physical Therapy, Center for Human Movement Science, School of Medicine, The University of North Carolina at Chapel Hill, CB# 7135 Bondurant Hall, Chapel Hill, NC, 27599-7135, USA.

Background: Anterior cruciate ligament (ACL) injury is one of the most common injuries in sports, and the injury mechanisms are not completely clear. Bone bruises seen on magnetic resonance imaging (MRI) following ACL injuries may provide significant information for determining ACL injury mechanisms.

Objective: The aim was to determine ACL injury mechanisms through an evaluation of locations of bone bruises associated with ACL injury. Read More

Skeletal Radiol 2019 Sep 28;48(9):1439-1442. Epub 2019 Jan 28.

Skeletal Radiology Department, Clínica MEDS, Santiago, Chile.

Congenital absence of the cruciate ligaments is a very rare condition, with most reported cases being related to the anterior cruciate ligament (ACL). Posterior cruciate ligament (PCL) congenital abnormalities have been described as almost always being associated with other anomalies. We present a case of a patient with lateral knee pain and subjective instability sensation after a low-energy trauma secondary to a lateral meniscus tear, with absence of the PCL on MRI examination and thickened meniscofemoral ligaments, with anterior and superior insertion at the femur, in the footprint of PCL. Read More

Orthop J Sports Med 2019 Jan 10;7(1):2325967118820057. Epub 2019 Jan 10.

Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, USA.

Background: An altered tibial position is still present despite anterior cruciate ligament (ACL) reconstruction. It has been demonstrated that an abnormal tibial position after an ACL injury may play a role in subsequent injuries to the meniscus, which can lead to early cartilage degeneration.

Purpose: To determine changes in both the tibial position and the meniscal matrix present before and after ACL reconstruction as well as to evaluate the association between these 2 variables in ACL-injured knees 3 years after reconstruction. Read More

Am J Sports Med 2019 02 18;47(2):285-295. Epub 2019 Jan 18.

II Clinica Ortopedica e Traumatologica, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.

Background: Tibiofemoral anatomic parameters, such as tibial slope, femoral condyle shape, and anterior tibial subluxation, have been suggested to increase the risk of anterior cruciate ligament (ACL) reconstruction failure. However, such features have never been assessed among patients experiencing multiple failures of ACL reconstruction.

Purpose: To compare the knee anatomic features of patients experiencing a single failure of ACL reconstruction with those experiencing multiple failures or with intact ACL reconstruction. Read More