Prevalence of Segond fractures associated with anterior cruciate ligament injuries and their influence on knee joint stability; A case-control study.

Background: The purpose of this study was to determine the prevalence of Segond fractures and to compare knee stability between patients undergoing primary anterior cruciate ligament (ACL) reconstruction with and without Segond fractures pre- and postoperatively.

Methods: A total of 712 patients who underwent primary ACL reconstruction between 2014 and 2019. Exclusion criteria included patients with multi-ligament knee injuries, skeletally immature patients, osteoarthritis in the knee, combined surgery of high tibial osteotomy, lack of data, and loss to follow-up for at least 2 years.

Biomechanical analysis of bioabsorbable suture anchors for rotator cuff repair using osteoporotic and normal bone models.

Background: This study aimed to compare the failure load of suture anchors used in rotator cuff repair between normal and osteoporotic bone models.

Methods: A total of 16 anchors made from metal (TwinFix Ti 5.0 or 6.

Effect of medial collateral ligament release and osteophyte resection on medial laxity in total knee arthroplasty.

Purpose: The concept of medial stabilizing technique total knee arthroplasty (MST-TKA) is to minimize the medial release without the superficial layer of medial collateral ligament (MCL). However, it is unclear at what stage the proper medial laxity is obtained during surgery. The purpose of this study was to investigate the implication of deep layer of MCL (dMCL) and osteophyte resection on medial laxity during MST-TKA.

Effects of the tibial tunnel position on knee joint stability and meniscal contact pressure after double-bundle anterior cruciate ligament reconstruction.

Background: To investigate the effect of the tibial tunnel position on knee stability and the maximum contact area and peak contact pressure on the menisci after double-bundle anterior cruciate ligament (ACL) reconstruction.

Methods: Ten human knee specimens (mean age: 74.1 ± 15.

Biomechanical analysis of medial patellofemoral ligament reconstruction: FiberTape® with knotless anchors versus a semitendinosus tendon autograft with soft anchors.

Background: With the use of synthetic materials for medial patellofemoral ligament (MPFL) reconstruction, graft harvest is not necessary and this may facilitate post-operative rehabilitation. The purpose of this study was to compare the structural properties of MPFL reconstruction using a modern synthetic material (FiberTape® (FT), Arthrex) with knotless anchors or a semitendinosus (ST) tendon autograft with soft anchors.

Methods: Nine human fresh-frozen amputated knees were used in this study.

Characteristics of elongated and ruptured anterior cruciate ligament grafts: An analysis of 21 consecutive revision cases.

Background/objective: Anterior cruciate ligament (ACL) reconstructions often fail without graft rupture. The purpose of this study was to compare the characteristics of patients with elongated and ruptured bone-patellar tendon-bone (BTB) grafts that required revision surgery.

Methods: Twenty one patients who required revisions of a BTB-reconstructed ACL between 2010 and 2015 were enrolled in this study.

Tunnel malpositions in anterior cruciate ligament risk cartilaginous changes and bucket-handle meniscal tear: Arthroscopic survey in both primary and revision surgery.

Objectives: There are not many chances to arthroscopically reassess how graft tunnel malpositions in primary anterior cruciate ligament reconstruction (ACLR) associate with intra-articular degeneration in revision ACLR. This study was aimed to evaluate whether radiographic tunnel position in primary ACLR affect cartilaginous changes and bucket-handle meniscus tears in revision ACLR.

Methods: Thirty-five patients who underwent revision ACLR were recruited; their primary surgeries were single-bundle reconstructions.

Biomechanical comparison between single-bundle and double-bundle anterior cruciate ligament reconstruction with hamstring tendon under cyclic loading condition.

Purpose: The purpose of this study was to compare the anterior tibial translation (ATT) of the anterior cruciate ligament (ACL) reconstructed-knee between single-bundle and double-bundle ACL reconstruction under cyclic loading.

Methods: Single-bundle and double-bundle reconstructions of the knee were performed sequentially in randomized order on the same side using eight human amputated knees. After each reconstruction, the reconstructed-knee was subjected to 500-cycles of 0 to 100-N anterior tibial loads using a material testing machine.

Biomechanical evaluation of an anatomic double-bundle posterior cruciate ligament reconstruction.

Purpose: The purpose of this study was to evaluate the effect of the anatomic double-bundle reconstruction (ADBR) of the posterior cruciate ligament (PCL) with 2 femoral tunnels and 2 tibial tunnels.

Methods: Eight fresh-frozen human knees were used. Bone tunnels were created based on the PCL anatomic footprints.

Comparison between clinical grading and navigation data of knee laxity in ACL-deficient knees.

Background: The latest version of the navigation system for anterior cruciate ligament (ACL) reconstruction has the supplementary ability to assess knee stability before and after ACL reconstruction. In this study, we compared navigation data between clinical grades in ACL-deficient knees and also analyzed correlation between clinical grading and navigation data.

Methods: 150 ACL deficient knees that received primary ACL reconstruction using an image-free navigation system were included.

Mechanisms for anterior cruciate ligament injuries in badminton.

Introduction: A high incidence of anterior cruciate ligament (ACL) injuries related to sports activities has been reported; however, the injury situation of ACL injury in badminton has not been elucidated. This study investigated the mechanism of ACL injury in badminton using a questionnaire.

Methods: Information on injury mechanism was gathered from interviews with six male and 15 female badminton players who received a non-contact ACL injury playing badminton and underwent ACL reconstruction.

Intraoperative comparison of knee laxity between anterior cruciate ligament-reconstructed knee and contralateral stable knee using navigation system.

Purpose: The objective of this study was to compare knee laxity between anterior cruciate ligament (ACL)-reconstructed knees and contralateral stable knees by use of intraoperative navigation.

Methods: Five patients with ipsilateral ACL-deficient knees with contralateral stable knees without any ligament injuries were included in this study. Anteroposterior (AP) knee laxity during anterior drawer force applied manually and range of tibial rotation and AP knee laxity during internal and external rotational torque applied manually in both the ACL-deficient knee and the contralateral stable knee were measured by use of a navigation system from 15 degrees to 90 degrees of knee flexion.

The actual tendon-bone interface strength in a rabbit model.

Purpose: The purpose of this study was to evaluate the strength of the interface throughout the entire integration process by use of tendon graft reinforced with a suture material compared with nonreinforced tendon graft.

Methods: Using 60 skeletally mature female Japanese white rabbits, we performed biomechanical testing and histologic evaluation to compare tendon grafts reinforced with a suture material (suture group) and nonreinforced grafts (control group). The tendon graft was drawn through a bone tunnel measuring 2.

Tunnel position and relationship to postoperative knee laxity after double-bundle anterior cruciate ligament reconstruction with a transtibial technique.

Background: Several laboratory studies have pointed out a potential risk of femoral tunnel misplacement in anterior cruciate ligament reconstruction with a transtibial technique. The tunnel malposition away from the anatomic attachment may result in increased postoperative knee laxity in double-bundle reconstruction.

Purpose: This study was conducted to evaluate the femoral and tibial tunnel positions in transtibial double-bundle reconstruction, and to determine the relationship between the tunnel positions and the results of the postoperative knee laxity examinations.

Sagittal realignment osteotomy for increased posterior tibial slope after opening-wedge high tibial osteotomy: a case report.

A 40 year old welder who underwent opening-wedge high tibial osteotomy for correction of alignment in a varus knee developed persistent pain with loss of knee extension. The posterior tibial slope increased from 9 degrees to 20 degrees after the osteotomy and caused the anteromedial knee pain and limited extension. The patient then underwent a revision osteotomy using a closing wedge technique to correct tibial slope.

Navigation evaluation of the pivot-shift phenomenon during double-bundle anterior cruciate ligament reconstruction: is the posterolateral bundle more important?

Purpose: The purpose of this study was to assess the pivot-shift phenomenon during double-bundle anterior cruciate ligament (ACL) reconstruction using a navigation system.

Methods: Ninety patients who received navigated double-bundle ACL reconstruction were included in this study. The mean age of the patients was 21.

Validation of computer-assisted open-wedge high tibial osteotomy using three-dimensional navigation.

An unintended increase in the posterior tibial slope after open-wedge high tibial osteotomy (HTO) can influence knee kinematics and stability. The objective for this study was to validate the change of the tibial slope obtained from three-dimensional (3D) navigation in open-wedge HTO by comparing it with that evaluated with computed tomography. Human cadaver knees were used.

Comparable results between lateralized single- and double-bundle ACL reconstructions.

Unlabelled: Patellar tendon autografts are not suitable for multibundle ACL reconstruction, a procedure that reportedly enhances postoperative knee stability. Biomechanical studies recommend lateral placement of the femoral tunnel for single-bundle reconstruction to improve postoperative knee kinematics. We asked whether a lateralized single-bundle patellar tendon graft (LSBP) would provide good short-term results of ACL reconstruction comparable to double-bundle hamstring tendon grafts (DBH).

Intraoperative biomechanical evaluation of anatomic anterior cruciate ligament reconstruction using a navigation system: comparison of hamstring tendon and bone-patellar tendon-bone graft.

Background: Recently, more anatomic anterior cruciate ligament reconstructions have been developed to improve knee laxity.

Purpose: The objective of this study is to assess knee kinematics after double-bundle reconstruction with hamstring tendon and after anatomically oriented reconstruction with a patellar tendon using navigation during surgery.

Study Design: Cross-sectional study; Level of evidence, 3.

Stability evaluation of single-bundle and double-bundle reconstruction during navigated ACL reconstruction.

Recently, anatomic double-bundle anterior cruciate ligament (ACL) reconstructions, which reproduce the anteromedial and posterolateral bundles, have been developed to improve knee laxity. However, there are little data on the in vivo biomechanics after such reconstructions. In this paper, we will review biomechanical and clinical studies that have compared single-bundle and double-bundle reconstruction, and introduce our intraoperative evaluation of double-bundle reconstruction using a navigation system.

Anatomical analysis of the anterior cruciate ligament femoral and tibial footprints.

Background: The current trend in anterior cruciate ligament (ACL) reconstruction has shifted to anatomical double-bundle (DB) reconstruction, which reproduces both the anteromedial bundle (AMB) and the posterolateral bundle (PLB) of the ACL. Navigation systems have also been recently introduced to orthopedic surgical procedures, including ACL reconstruction. In DB-ACL reconstruction, the femoral and tibial tunnel positions are very important, but a representation of the ACL footprint under an arthroscopic view has not been established even though navigation systems have been introduced.

Validation of computer-assisted double-bundle anterior cruciate ligament reconstruction.

The goal of this study was to establish the reliability of a navigation system for femoral tunnel placement in arthroscopic double-bundle anterior cruciate ligament (ACL) reconstruction. Guidewires were inserted to the center of the anteromedial and posterolateral femoral tunnels of eight porcine knees using an image-free navigation system. The relative position of the guidewires in reference to the height and depth of the lateral condyle was determined by the navigation system and a digital camera and compared.

Future of double-bundle anterior cruciate ligament (ACL) reconstruction: incorporation of ACL anatomic data into the navigation system.

This study compares anatomy and tunnel placement during double-bundle procedures. Double-bundle anterior cruciate ligament (ACL) reconstruction reproduces both the anteromedial and posterolateral bundles. Thirty-six knees from cadavers were used for anatomic study, and 38 navigated double-bundle ACL reconstructions were evaluated for tunnel placements.

A biomechanical comparison of repair techniques for anterior cruciate ligament tibial avulsion fracture under cyclic loading.

Purpose: Although several technical developments for arthroscopic treatment of anterior cruciate ligament (ACL) avulsion fracture have been reported, it remains unclear which fixation technique is most effective to obtain the best initial fixation strength. The objectives of this study were to compare the initial fixation strength in response to a cyclic tensile load between different fixation techniques for ACL avulsion fractures.

Type Of Study: Cadaveric biomechanical evaluation.