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https://www.readbyqxmd.com/read/29916933/a-locked-intraosseous-nail-for-transverse-patellar-fractures-a-biomechanical-comparison-with-tension-band-wiring-through-cannulated-screws
#1
Michael Nienhaus, Ivan Zderic, Dieter Wahl, Boyko Gueorguiev, Pol Maria Rommens
BACKGROUND: Displaced transverse patellar fractures require open reduction and internal fixation. State-of-the-art stabilization techniques are tension band wiring (TBW) using Kirschner wires or cannulated screws. These techniques are associated with high rates of secondary fracture displacement, implant migration, implant prominence, wound-healing disturbances, and the need for implant removal. Recently, a locked intraosseous patellar nail prototype was developed. The aim of the present study was to investigate the biomechanical performance of this nail compared with TBW using cannulated screws...
June 20, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29896020/biomechanical-assessment-of-an-alternative-method-of-staple-fixation-for-anchoring-the-bone-patellar-tendon-bone-graft-to-the-tibia
#2
Thomas Matthai, Vinu M George, Anbu S Rao, Anil T Oommen, Ravi J Korula, Suresh Devasahayam, Pradeep M Poonnoose
Introduction: The Anterior cruciate ligament (ACL) is the most commonly injured ligament around the knee and is best reconstructed with a biological graft. For ideal graft fixation, there should be sufficient initial strength to avoid failure of fixation and sufficient stiffness to restore the stability of the knee and to avoid gradual loosening in the post-operative period.When considering fixation of Bone Patellar Tendon Bone (BPTB) grafts to the tibia, the interference screw is considered to be the gold standard...
April 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29896012/femoral-press-fit-fixation-versus-interference-screw-fixation-in-anterior-cruciate-ligament-reconstruction-with-bone-patellar-tendon-bone-autograft-20-year-follow-up
#3
A Biazzo, A Manzotti, K Motavalli, N Confalonieri
Introduction: The aim of this paper is to present our experience with femoral press-fit fixation in anterior cruciate ligament reconstruction using bone-patellar tendon-bone autograft. Methods: The patient population was randomly placed in two groups: group A (58 patients), who underwent femoral screw fixation; group B (62 patients), who underwent femoral press-fit fixation. Results: At last follow-up 9.2% of patients were lost; 28% of patients in group A and 64% of patients in group B had excellent International Knee Documentation Committee score (grade A); 66% of patients in group A and 32% of patients in group B had good International Knee Documentation Committee scores (grade B)...
April 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29895865/a-potential-new-role-for-myofibroblasts-in-remodeling-of-sub-rupture-fatigue-tendon-injuries-by-exercise
#4
Rebecca Bell, N Remi Gendron, Matthew Anderson, Evan L Flatow, Nelly Andarawis-Puri
Tendons are ineffective at repairing sub-rupture fatigue injuries. Accordingly, we evaluated whether an exercise protocol that we have previously found to decrease structural damage kinks in fatigue damaged tendons, leads to improvement in mechanical properties. We hypothesized that exercise that promotes repair of fatigue damage will decrease apoptosis and increase the population of myofibroblasts. Rat patellar tendons underwent in vivo fatigue loading for 500 or 7200 cycles. Animals resumed cage activity for 2-weeks, then either remained cage active or began treadmill running until sacrifice at 4- or 10-weeks post-fatigue loading...
June 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29890893/anatomic-reconstruction-of-anterior-talofibular-ligament-with-tibial-tuberosity-patellar-tendon-autograft-for-chronic-lateral-ankle-instability
#5
Can Chen, Hongbin Lu, Jianzhong Hu, Xuqiang Qiu, Xiong Li, Deyi Sun, Jin Qu, Tao Zhang, Daqi Xu
INTRODUCTION: Anatomic repair of the anterior talofibular ligament (ATFL) is challenging when the local ligamentous tissue is severely attenuated. Anatomic reconstruction of the ATFL with tibial tuberosity-patellar tendon (TT-PT) autograft is a feasible choice that can avoid the complicated tendon-bone healing and restore ankle stability. MATERIALS AND METHODS: From 2009 to 2015, 31 chronic lateral ankle instability (CLAI) patients (31 ankles), who had a serious injury on the ATFL only, were treated with anatomic reconstruction of ATFL with TT-PT...
May 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29884561/impingement-of-the-patellar-component-against-the-tibial-post-depends-on-the-design-of-the-post-cam-mechanism-comparison-between-12-posterior-stabilized-total-knee-prostheses
#6
Yukihide Minoda, Ryo Sugama, Yoichi Ohta, Mitsuhiko Ikebuchi, Hiroaki Nakamura
BACKGROUND: Patella-post impingement (PPI), contact of the patellar component with the tibial post, occurs during deep knee flexion after posterior stabilized total knee arthroplasty (TKA). In a previous pilot study, only two product lines were investigated. The aim of this study was to compare PPI between 12 contemporary posterior stabilized knee prostheses. METHODS: Twelve posterior stabilized knee prostheses were implanted in full-length sawbone models of the femur and tibia using a navigation system...
June 5, 2018: Knee
https://www.readbyqxmd.com/read/29868412/lateral-patellofemoral-ligament-reconstruction-with-a-gracilis-allograft
#7
Michael Saper
Isolated medial patellar subluxation (MPS), in the absence of a previous lateral retinacular release, is a poorly recognized clinical condition characterized by chronic anterior knee pain that is exacerbated with knee flexion. This type of patellar instability is often overlooked, and a high index of suspicion is needed for appropriate diagnosis and treatment. The purpose of this Technical Note is to describe a surgical technique to reconstruct the lateral patellofemoral ligament with an allograft gracilis tendon...
April 2018: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29868404/anterior-cruciate-ligament-reconstruction-with-amnion-biological-augmentation
#8
Brittany M Woodall, Nicholas Elena, Joseph T Gamboa, Edward C Shin, Neil Pathare, Patrick J McGahan, James L Chen
Anterior cruciate ligament (ACL) ruptures are common and unfortunate injuries for many athletes. The standard therapy for ACL rupture is ACL reconstruction with either autograft, harvested from hamstring or patellar tendon, or allograft tendon from a tissue donor. Advances in tissue engineering have produced interventions to augment the healing process and may have applications when it comes to ACL reconstruction. In this Technical Note and accompanying video, we describe a simple technique to implant an amnion matrix graft with a tendon graft during ACL reconstruction...
April 2018: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29862593/quantifying-proximal-patellar-tendon-changes-during-adolescence-in-elite-ballet-dancers-a-2-year-study
#9
Aliza Rudavsky, Jillianne Cook, Sean Docking
PURPOSE: Patellar tendon pathology appears to develop in young athletes. It is not known how this tendon develops through adolescence. This longitudinal study investigated proximal patellar tendon development during the adolescent growth spurt in young ballet dancers, and identified if puberty (estimated by maturity offset) had an effect on tendon development. METHODS: 52 dancers (32 female and 20 male dancers, ages 11-18 at baseline) had ultrasound images of their tendons every 6 months for 2 years...
June 4, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29861784/a-review-on-biomechanics-of-anterior-cruciate-ligament-and-materials-for-reconstruction
#10
REVIEW
M Marieswaran, Ishita Jain, Bhavuk Garg, Vijay Sharma, Dinesh Kalyanasundaram
The anterior cruciate ligament is one of the six ligaments in the human knee joint that provides stability during articulations. It is relatively prone to acute and chronic injuries as compared to other ligaments. Repair and self-healing of an injured anterior cruciate ligament are time-consuming processes. For personnel resuming an active sports life, surgical repair or replacement is essential. Untreated anterior cruciate ligament tear results frequently in osteoarthritis. Therefore, understanding of the biomechanics of injury and properties of the native ligament is crucial...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29860681/patellar-tendon-properties-distinguish-elite-from-non-elite-soccer-players-and-are-related-to-peak-horizontal-but-not-vertical-power
#11
Conall F Murtagh, Michael Stubbs, Jos Vanrenterghem, Andrew O'Boyle, Ryland Morgans, Barry Drust, Robert M Erskine
PURPOSE: To investigate potential differences in patellar tendon properties between elite and non-elite soccer players, and to establish whether tendon properties were related to power assessed during unilateral jumps performed in different directions. METHODS: Elite (n = 16; age 18.1 ± 1.0 years) and non-elite (n = 13; age 22.3 ± 2.7 years) soccer players performed vertical, horizontal-forward and medial unilateral countermovement jumps (CMJs) on a force plate...
June 2, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29852514/intra-articular-biocompatibility-of-multistranded-long-chain-polyethylene-suture-tape-in-a-canine-acl-model
#12
Patrick A Smith, Chantelle C Bozynski, Keiichi Kuroki, Sarah M Henrich, Coen A Wijdicks, James L Cook
The purpose of this study was to assess intra-articular use of a nonabsorbable braided suture tape for its biocompatibility when implanted adjacent to the native anterior cruciate ligament (ACL) in a canine model. Establishing biocompatibility of suture tape in the knee is an important foundational step for clinicians considering use of suture tape augmentation for ACL reconstruction or repair. The study hypothesis was that a nonabsorbable braided suture tape would be biocompatible in the knee with no resultant adverse functional consequences, and no significant intra-articular synovial reactions or articular cartilage degeneration attributable to direct exposure to the suture tape, whether intact or transected...
May 31, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29808145/reconstruction-of-acute-patellar-tendon-rupture-after-patellectomy
#13
Kenjiro Fujimura, Koji Sakuraba, Satoshi Kamura, Kiyoshi Miyazaki, Nobuo Kobara, Kazumasa Terada, Hisaaki Miyahara
Acute rupture of the knee extensor mechanism after patellectomy is extremely rare. We present the case of a patient with acute patellar tendon rupture who had undergone patellectomy 53 years before. Twelve days after the injury, the ruptured patellar tendon was repaired with end-to-end suture. Postoperatively, we splinted the knee for 6 weeks but permitted the patient to walk without limiting weight bearing at 1 week postoperatively. At one-year follow-up, the patient is able to move his knee almost full range of motion and the Lysholm knee score is 81...
2018: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/29806381/-improved-technique-for-perforation-of-patella-combined-with-suture-anchor-and-non-tourniquet-for-repairing-acute-rupture-of-the-bone-tendon-junction-of-quadriceps-tendon
#14
Gouzhong Wu
Objective: To investigate effectiveness of a improved technique for perforation of patella combined with suture anchor and non-tourniquet for repairing acute rupture of the bone tendon junction of quadriceps tendon. Methods: Between June 2010 and June 2016, 15 patients with acute rupture of the bone tendon junction of quadriceps tendon were treated with the improved technique for perforation of patella combined with suture anchor and non-tourniquet. Of them, 14 were male and 1 was female, aged from 19 to 74 years (mean, 44 years)...
December 1, 2017: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29806056/arthroscopic-patellar-release-allows-timely-return-to-performance-in-professional-and-amateur-athletes-with-chronic-patellar-tendinopathy
#15
Jan M Pestka, Gernot Lang, Dirk Maier, Norbert P Südkamp, Peter Ogon, Kaywan Izadpanah
PURPOSE: Return to sports rates in amateur and professional athletes with chronic patellar tendinopathy following arthroscopic patellar release are unpredictable. The present study aims to analyse the effectiveness of arthroscopic patellar release in professional compared to amateur athletes. METHODS: A total of 34 amateur and 20 professional athletes with chronic patellar tendinopathy, refractory to conservative treatment, were studied prospectively and underwent arthroscopic tendon release at the inferior patellar pole...
May 27, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29805530/treatment-of-recurrent-patellar-dislocation-via-knee-arthroscopy-combined-with-c-arm-fluoroscopy-and-reconstruction-of-the-medial-patellofemoral-ligament
#16
Li Li, Hongbo Wang, Yun He, Yu Si, Hongyu Zhou, Xin Wang
Recurrent patellar dislocations were treated via knee arthroscopy combined with C-arm fluoroscopy, and reconstruction of the medial patellofemoral ligaments. Between October 2013 and March 2017, 52 cases of recurrent patellar dislocation [27 males and 25 females; age, 16-47 years (mean, 21.90 years)] were treated. Arthroscopic exploration was performed and patellofemoral joint cartilage injuries were repaired. It was subsequently determined whether it was necessary to release the lateral patellofemoral support belt...
June 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29798531/-effects-of-cryopreservation-on-biological-characteristics-of-tendon-derived-stem-cells-in-rat-patellar-tendon
#17
Guangchun Dai, Yingjuan Li, Hongliang Xu, Yucheng Lin, Junyan Liu, Lin Xu, Yunfeng Rui
Objective: To explore the effects of cryopreservation on the cell survival rate, cell viability, early apoptosis, migration ability, and tendon-related marker expression of tendon-derived stem cells (TDSCs) in rat patellar tendons. Methods: The patellar tendon tissues were harvested from 12 4-month-old male Sprague Dawley rats; 12 patellar tendon tissues from 6 rats were cryopreserved (the experimental group), and the other 12 patellar tendon tissues were not treated (the control group)...
July 1, 2017: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29794489/tibial-plateau-fracture-following-anterior-cruciate-ligament-reconstruction-with-a-bone-patellar-tendon-bone-allograft-a-case-report
#18
Blake M Bodendorfer, Joshua A Kotler, Caitlin J Thornley, William F Postma
CASE: A 36-year-old woman sustained a medial tibial plateau fracture involving a tibial tunnel that had been used 4 years prior for an anterior cruciate ligament (ACL) reconstruction with a bone-patellar tendon-bone (BPTB) allograft in the same knee. At 26 months following open reduction and internal fixation of the tibial plateau fracture (6 years following the index ACL reconstruction), the patient returned to full activity. CONCLUSION: To our knowledge, this is the first report of a tibial plateau fracture following ACL reconstruction with a BPTB allograft, which adds to the paucity of literature discussing tibial plateau fractures following ACL reconstruction and discusses the potential predisposing factors to fracture such as ACL graft selection and surgical technique...
May 23, 2018: JBJS Case Connector
https://www.readbyqxmd.com/read/29794274/pain-mapping-of-the-anterior-knee-injured-athletes-know-best
#19
Ebonie Rio, Michael Girdwood, Jake Thomas, Christopher Garofalo, Lauren V Fortington, Sean Docking
BACKGROUND AND AIMS: Research investigating differences in pain location and distribution across conditions is lacking. Mapping a patient's pain may be a useful way of understanding differences in presentations, however the use of pain mapping during a pain provocation task has not been investigated. The aim of this study was to assess the reliability of patient and clinician rated pain maps during a pain provocation task for the anterior knee. METHODS: Participants were recruited from a larger study of professional Australian rules football players (n=17)...
May 18, 2018: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29792785/two-cases-of-combined-patellar-tendon-avulsion-from-the-tibia-and-patella
#20
Viachaslau Bradko, William T Stoll, Lee S Haruno, Scott B Rosenfeld, Scott D McKay
Avulsion fractures of the inferior pole of the patella and proximal tibial apophysis are independently rare injuries. They occur in children due to the relative weakness of the apophyseal cartilage compared to the ligaments and tendons. The combination of these two fractures, is exceedingly rare, with only a few previously described cases in the literature. Due to the infrequent presentation of this injury, careful examination and consideration of advanced imaging is important for diagnosis and preoperative planning...
2018: SICOT-J
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