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Knee Surg Sports Traumatol Arthrosc 2020 Jul 1. Epub 2020 Jul 1.

Shanghai Key Laboratory of Orthopaedic Implants and Clinical Translational R&D Center of 3D Printing Technology, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; School of Biomedical Engineering and Med.X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China.

Purpose: The present study aimed to investigate the three-dimensional topographic anatomy of the anterior cruciate ligament (ACL) bundle attachment in both ACL-rupture and ACL-intact patients who suffered a noncontact knee injury and identify potential differences.

Methods: Magnetic resonance images of 90 ACL-rupture knees and 90 matched ACL-intact knees, who suffered a noncontact knee injury, were used to create 3D ACL insertion models.

Results: In the ACL-rupture knees, the femoral origin of the anteromedial (AM) bundle was 24. Read More

Zhongguo Gu Shang 2020 Jun;33(6):554-7

Department of Sports Medicine, the First Hospital of Kunming, Kunming 650000, Yunnan, China.

Objective: To explore the method and curative effect of double bundle reconstruction of posterior cruciate ligament with total internal short tendon technique.

Methods: From October 2010 to June 2018, 50 patients with simple posterior cruciate ligament rupture were admitted, including 35 males and 15 females, ranging in age from 20 to 45 years old, 16 with acute injury and 34 with old injury. The posterior cruciate ligament (PCL) was reconstructed by double bundle technique with the whole internal short tendon. Read More

Orthop J Sports Med 2019 Dec 31;7(12):2325967119891164. Epub 2019 Dec 31.

Institute of Sports Medicine, Peking University Third Hospital, Beijing, People's Republic of China.

Background: The posterior cruciate ligament (PCL) is an important structure in knee stabilization. Knee cartilage degeneration after a PCL injury has been reported in several studies. Understanding the changes in movement patterns of patients with PCL ruptures could help clinicians make specific treatment protocols to restore patients' sporting ability and prevent joint degeneration. Read More

Arthrosc Sports Med Rehabil 2020 Jun 28;2(3):e207-e212. Epub 2020 Apr 28.

Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana, U.S.A.

Purpose: To determine how well the orthopaedic sports medicine literature reported sex-specific analysis (SSA) in 2011 and 2016.

Methods: The 3 highest-impact orthopaedic sports medicine subspecialty journals (; ; and , ) were selected for review. Two independent investigators reviewed all journal issues published during 2 different calendar years (2011 and 2016). Read More

Gait Posture 2020 Jun 6;80:217-222. Epub 2020 Jun 6.

School of Kinesiology, Faculty of Medicine, Univesity of Montreal, Montreal, Canada. Electronic address:

Background: Selecting the appropriate cut-off frequency to filter triaxial accelerometric data is a challenging issue in gait analyses. It reduces soft tissues artifacts and the variability in the kinematic data waveform from able-bodied and physically impaired gaits.

Research Question: Are cut-off frequencies estimated by four filtering methods similar along each axis of a triaxial accelerometer and for able-bodied subjects and those with an anterior cruciate ligament rupture (ACLR)?

Methods: After walking on a treadmill, the cut-off frequency for the tibial accelerations was calculated using 95 and 99 per cent of the energy spectrum (E), residual analysis (RA) and, the method (Yu) proposed by Yu et al. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2020 Jun;34(6):720-725

Guangzhou Medical University, Guangzhou Guangdong, 511436, P.R.China;Department of Sports Medicine, Second People's Hospital, Shenzhen Guangdong, 518002, P.R.China.

Objective: To evaluate and compare knee joint stability of grade Ⅲ medial collateral ligament (MCL) injury treated by single-bundle and anatomical double-bundle reconstruction methods, thus providing biomechanical basis for clinical treatment.

Methods: Nine fresh cadaver specimens of normal human knee joints were randomly divided into 3 groups on average. In intact MCL group: The anterior cruciate ligament (ACL) was detached and reconstructed with single-bundle techniques, and the MCL was intact. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2020 Jun;34(6):713-719

Department of Orthopaedics, Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou Fujian, 363000, P.R.China.

Objective: To investigate the effectiveness of the reconstruction of posterior cruciate ligament (PCL) with platelet rich plasma (PRP) and 3-strand peroneal longus tendons under arthroscope.

Methods: Between June 2014 and December 2017, 58 patients with PCL rupture were randomly divided into two groups: the trial group (PRP assisted reconstruction of 3-strand peroneal longus tendons) and the control group (4-strand hamstring tendon reconstruction alone), 29 cases in each group. There was no significant difference in gender, age, injury side, Kellgren-Lawrence grade, time from injury to operation, and preoperative American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score, International Knee Documentation Committee (IKDC) score, Lysholm score between the two groups ( >0. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2020 Jun;34(6):707-712

Department of Orthopaedics and Joint Surgery, the Affiliated Hospital of Southwest Medical University, Luzhou Sichuan, 646000, P.R.China.

Objective: To compare the early effectiveness of minimally invasive open reduction and internal fixation via posterior median approach versus arthroscopic double-tunnel suture fixation in treatment of tibial avulsion fracture of the posterior cruciate ligament (PCL).

Methods: A clinical data of 31 patients with the tibial avulsion fracture of the PCL and met the criteria between January 2015 and January 2019 was retrospectively analyzed. Nineteen patients (group A) were treated with open reduction and internal fixation with cannulated screw via posterior median approach. Read More

Am J Sports Med 2020 Jul 9;48(8):1893-1899. Epub 2020 Jun 9.

Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA.

Background: Some cadaveric studies have indicated that the anterior cruciate ligament (ACL) consists of anteromedial and posterolateral bundles that display reciprocal function with regard to knee flexion. However, several in vivo imaging studies have suggested that these bundles elongate in parallel with regard to flexion. Furthermore, the most appropriate description of the functional anatomy of the ACL is still debated, with the ACL being described as consisting of 2 or 3 bundles or as a continuum of fibers. Read More

Int Orthop 2020 Jun 7. Epub 2020 Jun 7.

Ganga Hospital, 313, Mettupalayam Road, Coimbatore, 641043, India.

Introduction: Prediction of recurrence in first-time patellar dislocation is an unsolved mystery. The purpose of our study is to compare patellar instability patients and normal control groups with anatomical risk factors and validation of newer parameters patello-trochlear index (PTI) and tibial tuberosity-posterior cruciate ligament (TT-PCL) and also to find the significant risk factors that help to predict the recurrence of dislocation in first-time dislocators.

Methods: This is a comparison study between 50 normal individuals as a control population (group-1) and 94 patients with patellar instability done between 2013 and 2017. Read More

Knee Surg Sports Traumatol Arthrosc 2020 Jun 5. Epub 2020 Jun 5.

Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada.

Purpose: To assess the literature on indications, outcomes, and complications in pediatric patients undergoing all-epiphyseal (AE) anterior cruciate ligament reconstruction (ACLR).

Methods: PubMed, Medline, and Embase were searched for literature evaluating AE ACLR in pediatric patients. All included studies were assessed for quality using the Methodological Index for Non-Randomized Studies (MINORS). Read More

Knee Surg Sports Traumatol Arthrosc 2020 Jun 5. Epub 2020 Jun 5.

Biomechanics Group, Mechanical Engineering Department, Imperial College London, London, SW7 2AZ, UK.

Purpose: The purpose of this study was to determine the contribution of each of the ACL and medial ligament structures in resisting anteromedial rotatory instability (AMRI) loads applied in vitro.

Methods: Twelve knees were tested using a robotic system. It imposed loads simulating clinical laxity tests at 0° to 90° flexion: ±90 N anterior-posterior force, ±8 Nm varus-valgus moment, and ±5 Nm internal-external rotation, and the tibial displacements were measured in the intact knee. Read More

Open Access J Sports Med 2020 13;11:105-112. Epub 2020 May 13.

Football Research Group, Linköping University, Linköping, Sweden.

Background: There is limited epidemiological information on injury rates and injury mechanisms for lateral collateral ligament (LCL) and posterior cruciate ligament (PCL) injuries in male professional soccer. In addition, time trends and lay-off times for these injuries have not yet been determined.

Aim: To determine injury rates and circumstances of LCL and PCL injuries over 17 seasons in men's professional soccer. Read More

Orthop J Sports Med 2020 May 19;8(5):2325967120921737. Epub 2020 May 19.

Department of Orthopedic Surgery, Columbia Orthopedic Group, Columbia, Missouri, USA.

Background: Meniscal root tears and ramp lesions have been rigorously characterized in recent literature. However, one of the most common lateral meniscal injuries identified with an acute anterior cruciate ligament (ACL) disruption, a posterior horn lateral meniscal oblique radial tear (LMORT), has not been thoroughly described.

Purpose: To determine the incidence of all meniscal tears and, more specifically, the incidence of posterior horn LMORTs in a multicenter cohort of consecutive, acute ACL reconstructions. Read More

Int Orthop 2020 Jul 1;44(7):1321-1324. Epub 2020 Jun 1.

Department of Orthopedic Surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea.

Objective: To evaluate the association between posterior tibial slope (PTS) and the short-term results of conservative treatment for the patients with anterior cruciate ligament (ACL) tears.

Methods: Thirty-seven patients (37 knees: male 33, female 4) who were managed with the same treatment protocols for ACL tears were included. All patients applied ACL brace and underwent standardized rehabilitation protocol. Read More

Knee Surg Sports Traumatol Arthrosc 2020 May 31. Epub 2020 May 31.

Nicolaas Institute of Constructive Orthopaedics Research and Education Foundation for Arthroplasty and Sports Medicine, Medistra Hospital, Jakarta, Indonesia.

Purpose: This study aimed to evaluate the differences in clinical outcome and donor site morbidity between the Peroneus Longus Tendon (PLT) and Hamstring Tendon (HT) in single-bundle Posterior Cruciate Ligament (PCL) reconstruction.

Methods: Patients with an isolated PCL injury underwent single-bundle PCL reconstruction using consecutive sampling. Patients were allocated into two groups (PLT and HT) and prospectively observed. Read More

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

BMC Surg 2020 May 25;20(1):114. Epub 2020 May 25.

Department of Orthopaedics, The Second Affiliated Hospital of Kunming Medical University, Kunming, China.

Background: Both tibial plateau fractures and extensor apparatus injuries are serious injuries to the knee joint that generally do not occur in the same patient. We report a rare case of open tibial plateau fracture combined with quadriceps tendon rupture and complete displacement of the patella into the tibial plateau fracture.

Case Presentation: The case involved a male who was 19 years old who had been in a motorcycle accident. Read More

Asian J Surg 2020 May 18. Epub 2020 May 18.

Division of Vascular and Transplant Surgery, Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea; Division of Vascular and Transplant Surgery, Department of Surgery, Incheon St. Mary's Hospital, The Catholic University of Korea, Incheon, 21431, Republic of Korea. Electronic address:

Orthop J Sports Med 2020 Apr 24;8(4):2325967120912427. Epub 2020 Apr 24.

Twin Cities Orthopedics, Edina, Minnesota, USA.

Background: Satisfactory outcomes have been reported after all-inside meniscus ramp repair with combined anterior cruciate ligament reconstruction (ACLR). However, clinical outcomes after ACLR with inside-out meniscus ramp repair are limited.

Purpose/hypothesis: The purpose of this study was to evaluate patient-reported outcomes for patients who underwent ACLR and medial meniscus ramp repair compared with those who underwent isolated ACLR; patients in the 2 groups were matched for age, sex, and sport/activity. Read More

J Biomech 2020 May 24;105:109818. Epub 2020 Apr 24.

Kevin P. Granata Biomechanics Lab, Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, United States. Electronic address:

The purpose of the present study was to compare landing mechanics between the stop jump (SJ) and drop vertical jump (DVJ) and to compare sex-based differences in landing mechanics between tasks. 50 healthy recreational athletes were recruited and each participant completed seven SJs and seven DVJs. Peak knee flexion and abduction angle, knee flexion and ab/adduction range of motion (ROM), peak vertical and posterior ground reaction force (GRF), peak internal knee extension and knee adduction moment were computed for the dominant limb during the first landing of both tasks. Read More

Scand J Med Sci Sports 2020 May 16. Epub 2020 May 16.

School of Behavioural and Health, Australian Catholic University, Melbourne, Vic, Australia.

Anterior cruciate ligament (ACL) injuries commonly occur during single-leg landing tasks and are a burdensome condition. Previous studies indicate that muscle forces play an important role in controlling ligamentous loading, yet these studies have typically used cadaveric models considering only the knee-spanning quadriceps, hamstrings, and gastrocnemius muscle groups. Any muscles (including non-knee-spanning muscles) capable of opposing the anterior shear joint reaction force and the valgus joint reaction moment are thought to have the greatest potential for protecting the ACL from injury. 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

Cureus 2020 Apr 4;12(4):e7532. Epub 2020 Apr 4.

Orthopaedics, Post Graduate Institute of Medical Education and Research, Chandigarh, IND.

We present an unusual and complex case of a 16-year-old adolescent male who injured his right knee and sustained combined avulsion injuries of posterior cruciate ligament (PCL) at the tibial insertion site, iliotibial band at lateral tibial condyle, and lateral collateral ligament (LCL) at femoral insertion site akin to osteoligamentous posterolateral corner injury. Anatomical reduction of the femoral LCL avulsion fragment was performed and fixed with a two 4-mm partially threaded cancellous screw. Iliotibial band avulsion was buttressed using Ellis t-plate and fixed with two 4-mm partially threaded cancellous screws. Read More

Knee Surg Sports Traumatol Arthrosc 2020 May 5. Epub 2020 May 5.

Department of Trauma, Hand and Reconstructive Surgery, University Medical Center, Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.

Purpose: This study aimed to compare the biomechanical properties of the popliteus bypass against the Larson technique for the reconstruction of a combined posterolateral corner and posterior cruciate ligament injury.

Methods: In 18 human cadaver knees, the kinematics for 134 N posterior loads, 10 Nm varus loads, and 5 Nm external rotational loads in 0°, 20°, 30°, 60,° and 90° of knee flexion were measured using a robotic and optical tracking system. The (1) posterior cruciate ligament, (2) meniscofibular/-tibial fibers, (3) popliteofibular ligament (PFL), (4) popliteotibial fascicle, (5) popliteus tendon, and (6) lateral collateral ligament were cut, and the measurements were repeated. Read More

Arthroscopy 2020 05;36(5):1386-1389

University of Oslo.

Two decades ago, it was not uncommon to call the posterolateral corner of the knee the "dark side of the knee." This was because there were few quantitative anatomic data, no anatomic-based reconstructions, and a high rate of clinical outcome failures. Most nonanatomic posterolateral reconstruction procedures at the time commonly resulted in significant recurrent increases in varus gapping and significant overconstraint in external rotation. 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 2020 Nov-Dec;22:104-108. Epub 2020 Mar 28.

Department of Orthopaedic Surgery, Dankook University College of Medicine, Manghyangro 201, Dongnam-gu, Cheonan, Chungnam, 330-715, Republic of Korea.

Purpose: The purpose of our study was to assess effect of posteromedial corner(PMC) injury on clinical outcomes and second-look arthroscopic findings after posterior cruciate ligament(PCL) reconstruction using Achilles tendon allograft.

Methods: A total of 51 patients who underwent arthroscopic PCL reconstruction for PCL rupture and second-look arthroscopy were retrospectively enrolled in our study from 2009 to 2019. The subjects were divided into two groups: PMC intact group included 31 patients; and PMC injured group included 18 patients. Read More

Br J Sports Med 2020 Apr 16. Epub 2020 Apr 16.

La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, Victoria, Australia.

Objective: To systematically review risk factors for hamstring strain injury (HSI).

Design: Systematic review update.

Data Sources: Database searches: (1) inception to 2011 (original), and (2) 2011 to December 2018 (update). Read More

Orthop Traumatol Surg Res 2020 May 8;106(3):469-473. Epub 2020 Apr 8.

Department of Orthopedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan.

Background: Lateral meniscus (LM) posterior root tear (PRT) is often associated with anterior cruciate ligament (ACL) injury and can result in rotational instability, joint overloading, and degenerative changes in the knee. Improved rotational stability and kinematics have been reported after LMPRT repair. However, it is unclear what repair technique can achieve the greatest reduction in LM extrusion (LME). Read More

Knee Surg Sports Traumatol Arthrosc 2020 Mar 31. Epub 2020 Mar 31.

Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.

Purpose: The purpose of this study was to reveal the influence of the variance in width between the tibial spine and the femoral intercondylar notch on the occurrence of ACL injury.

Methods: Thirty-nine subjects undergoing anatomical ACL reconstruction (30 female, 9 male; average age 29 ± 15.2) and 37 subjects with intact ACL (21 female, 16 male; average age 29 ± 12. Read More

Zhongguo Gu Shang 2020 Mar;33(3):234-7

Department of Orthopaedics, the Third Affiliated Hospital of Wenzhou Medical University, Ruian 325200, Zhejiang, China.

Objective: To measure anatomical data of anterior and posterior root attachments of the medial and lateral menisci for reconstruction of root tears.

Methods: Thirty cadaveric knee joints of human were chosen, including 16 males and 14 females, death age ranged from 35 to 68 years old with an average age of (55.6±7. Read More

Orthop Surg 2020 Apr 16;12(2):378-387. Epub 2020 Mar 16.

Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, Rhode Island, USA.

To describe the outcomes of autografts and synthetics in anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) reconstruction with respect to instrumented laxity measurements, patient-reported outcome scores, complications, and graft failure risk. We searched PubMed, Cochrane Library, and EMBASE for published randomized controlled trials (RCT) and case controlled trials (CCTs) to compare the outcomes of the autografts versus synthetics after cruciate ligament reconstruction. Data analyses were performed using Cochrane Collaboration RevMan 5. Read More

Case Rep Orthop 2020 24;2020:7348201. Epub 2020 Feb 24.

Department of Sports Orthopedic Surgery, Kanto Rosai Hospital, 1-1 Kizukisumiyoshicho, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Japan.

Till date, there are no clear guidelines regarding the treatment of multiple ligament knee injuries. Ligament repair is advantageous as it preserves proprioception and does not involve grafting. Many studies have reported the use of open repair and reconstruction for multiple ligament knee injuries; however, reports on arthroscopic-combined single-stage anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) repairs are scarce. Read More

Knee Surg Sports Traumatol Arthrosc 2020 Mar 10. Epub 2020 Mar 10.

Sydney Orthopaedic Research Institute, Level 1, 445 Victoria Avenue, Chatswood, Sydney, NSW, Australia.

Purpose: The aim of this study was to determine if a difference exists in the relationship between the femoral intercondylar notch volume, and the volumes of anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) in ACL injured patients and healthy subjects.

Methods: Intact knees of 19 healthy subjects and bilateral knees of 18 ipsilateral ACL reconstructed patients were scanned using 3-tesla high-resolution magnetic resonance imaging. The intercondylar notch, ACL, PCL and hamstring graft were segmented using three-dimensional (3D) processing software. Read More

Knee Surg Sports Traumatol Arthrosc 2020 Mar 10. Epub 2020 Mar 10.

Centre for Sports Orthopedics and Special Joint Surgery, Orthopedic Hospital Markgroeningen, Kurt-Lindemann-Weg 10, 71706, Markgroeningen, Germany.

Purpose: To analyse 1000 consecutive patients, treated with isolated or combined posterior cruciate ligament (PCL) reconstruction in a single centre according to the epidemiological factors and differences in injury patterns depending on the activity during trauma.

Methods: Between 2004 and 2019, one thousand isolated and combined PCL reconstructions were performed. The medical charts and surgical reports of all patients were analysed regarding epidemiological factors. Read More

Zhen Ci Yan Jiu 2020 Jan;45(1):57-61

Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700.

Objective: The present study is to investigate the characteristic distribution of primary pain points and referred pain areas in patients with knee-joint pain diseases, therefore revealing the correlation between the myofascial trigger point and acupoint sensitization.

Methods: A total of 483 patients (320 men and 163 women, 36 to 72 years in age) with knee-joint pain recruited from 4 clinical centers were observed from July, 2017 to April, 2019 in the present study. The areas of primary and referred pain in these patients were detected by thumb-pressing and marked on human anatomic atlas. Read More

Gait Posture 2020 03 18;77:283-287. Epub 2020 Feb 18.

Department of Kinesiology, Iowa State University, Ames, IA, USA.

Background: Dynamic postural control during everyday tasks is poorly understood in people following anterior cruciate ligament reconstruction (ACLR). Understanding dynamic postural control can provide insight into potentially modifiable impairments in people following ACLR who are at increased risk for second ACL injury and/or knee osteoarthritis.

Research Question: Determine whether measures indicative of dynamic postural control differ between individuals with and without ACLR during stair ascent and descent. Read More

Arthrosc Tech 2020 Feb 22;9(2):e263-e265. Epub 2020 Jan 22.

Department of Orthopaedics, Middlemore Hospital, Auckland, New Zealand.

There has been increased emphasis on medial meniscus repair in the anterior cruciate ligament-reconstructed knee, as this improves stability. We describe an arthroscopic sign of an unstable medial meniscal tear that is diagnostic. The "crevice sign" is a longitudinal fissure located on the distal medial femoral condyle. Read More

J Biomech 2020 Mar 30;101:109635. Epub 2020 Jan 30.

Department of Life Sciences, University of Roehampton, London, UK.

The conventional gait model (CGM) refers to several closely related biomechanical models used in the objective analysis of human motion. Their use has become popular in the analysis of change of direction tasks to inform best practice in the prevention and rehabilitation of anterior cruciate ligament injury. As externally-placed markers define segment axes origins and orientations, kinematic and kinetic outputs from the CGM are sensitive to marker placement. 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

Orthop J Sports Med 2020 Jan 24;8(1):2325967119895258. Epub 2020 Jan 24.

Aix-Marseille Université, Marseille, France.

Background: There is no general consensus on the normal and pathological values for the posterior tibial slope (PTS).

Purpose/hypothesis: The primary aim of this study was to determine standard values for the PTS in healthy participants using 3-dimensional (3D) computed tomography (CT). A secondary aim was to determine the effect of demographic factors and coronal-plane lower limb alignment on the PTS measurement. Read More

Instr Course Lect 2019 ;68:513-544

The management of knee ligament injuries continues to evolve, and much debate persists over the timing of surgery, repair versus reconstruction, surgical technique, postoperative rehabilitation, graft selection, and fixation. Surgeons should be aware of updates on the best management strategies of knee ligament injuries in 2018 and understand the important history and physical examination findings of the knee with ligamentous injury; the anterior cruciate ligament; the role of the anterolateral ligament and lateral extra-articular tenodesis; combined anterior cruciate ligament and medial collateral ligament injuries; the posterior cruciate ligament; medial collateral ligament repair versus reconstruction; posterolateral corner repair versus reconstruction; the role of coronal plane osteotomies, including high tibial osteotomy and distal femoral osteotomy; the role of sagittal plane osteotomies, including anterior closing wedge osteotomy and anterior opening wedge osteotomy; the initial management of the multiligament-injured knee; and five keys to avoiding complications in the multiligament-injured knee. The best available evidence and sample case presentations help guide surgical decision making and improve patient outcomes. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2020 Feb;34(2):190-195

Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China.

Objective: To investigate the method and effectiveness of transosseous suture technique in repairing anterior cruciate ligament (ACL) avulsion injury for the multiple ligament injuries with knee dislocation (MLIKD).

Methods: The clinical data of 27 patients (27 knees) with MLIKD between September 2010 and April 2016 were analyzed retrospectively. There were 21 males and 6 females, with an average age of 42 years (range, 24-60 years). 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

Instr Course Lect 2020 ;69:653-660

This review focuses on the management of anterior cruciate ligament (ACL) reconstruction patients when other concomitant pathology may need to be addressed at the time of surgery. Given the role of the posterior horn of the medial meniscus in preventing osteoarthritis progression and contributing to knee stability, medial meniscus repair should always be considered when performing ACL reconstruction. Meniscal transplant may also be appropriate in select patients with normal knee alignment and absent of cartilage abnormalities in the compartment. Read More

Open Access Maced J Med Sci 2019 Nov 11;7(21):3623-3625. Epub 2019 Oct 11.

Department of Orthopaedic and Traumatology, Faculty of Medicine Universitas Sebelas Maret, Solo, Indonesia.

Background: Avulsion injury to the tibial attachment of posterior cruciate ligament (PCL) is frequently occur. The purpose of this report is to highlight an unusual variation of PCL avulsion injury.

Case Presentation: A 24-year-old female was suffered a motorcycle accident 1 day before admission. Read More

Zhonghua Yi Xue Za Zhi 2020 Jan;100(3):187-191

Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266000, China.

To compare the clinical outcome of posterior cruciate ligament (PCL) retention type and PCL substituting type using Advance(®) Medial Pivot (AMP) inner-axis knee prosthesis. A retrospective analysis was conducted on the cases of total knee arthroplasty (TKA) with AMP prosthesis in the Affiliated Hospital of Qingdao University from January 2011 to September 2016. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), American Knee Society Knee Score (KSS) clinical scores, KSS functional scores and knee-joint range of motion (ROM) before and after TKA, and Forgotten Joint Scores (FJS) after TKA were collected. Read More