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https://www.readbyqxmd.com/read/28729605/evaluating-the-effects-of-material-properties-of-artificial-meniscal-implant-in-the-human-knee-joint-using-finite-element-analysis
#1
Duraisamy Shriram, Gideon Praveen Kumar, Fangsen Cui, Yee Han Dave Lee, Karupppasamy Subburaj
Artificial meniscal implants may replace severely injured meniscus and restore the normal functionality of the knee joint. Implant material stiffness and shape influence the longevity of implantations. This study, using 3D finite element analysis, aimed to evaluate the effects of material stiffness variations of anatomically shaped artificial meniscal implant in the knee joint. Finite element simulations were conducted on five different cases including intact knee, medial meniscectomized knee, and the knee joint with the meniscal implant with three distinct material stiffness...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28727937/preoperative-short-form-health-survey-score-is-predictive-of-return-to-play-and-minimal-clinically-important-difference-at-a-minimum-2-year-follow-up-after-anterior-cruciate-ligament-reconstruction
#2
Benedict U Nwachukwu, Brenda Chang, Pramod B Voleti, Patricia Berkanish, Matthew R Cohn, David W Altchek, Answorth A Allen, Riley J Williams
BACKGROUND: There is increased interest in understanding the preoperative determinants of postoperative outcomes. Return to play (RTP) and the patient-reported minimal clinically important difference (MCID) are useful measures of postoperative outcomes after anterior cruciate ligament reconstruction (ACLR). PURPOSE: To define the MCID after ACLR and to investigate the role of preoperative outcome scores for predicting the MCID and RTP after ACLR. STUDY DESIGN: Case-control study; Level of evidence, 3...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28719940/surgical-repair-of-neglected-bucket-handle-meniscal-tears-displaced-into-the-intercondylar-notch-clinical-and-radiological-results
#3
Engin Cetinkaya, Sarper Gursu, Murat Gul, Umit Selcuk Aykut, Rasit Ozcafer
No abstract text is available yet for this article.
July 18, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28719787/in-vivo-performance-of-a-novel-anatomically-shaped-total-meniscal-prosthesis-made-of-polycarbonate-urethane-a-12-month-evaluation-in-goats
#4
Anne C T Vrancken, Gerjon Hannink, Wojciech Madej, Nico Verdonschot, Tony G van Tienen, Pieter Buma
BACKGROUND: Injury or loss of the meniscus generally leads to degenerative osteoarthritic changes in the knee joint. However, the treatment options for symptomatic patients with total meniscectomy are limited. Therefore, we developed a novel, anatomically shaped, total meniscal implant made of polycarbonate urethane. PURPOSE: To evaluate the in vivo performance of this novel total meniscal implant. The assessment particularly focused on the implant's response to long-term physiological loading in a goat model and its chondroprotective capacity in comparison to clinically relevant controls...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28719562/meniscal-repair-reconsidering-indications-techniques-and-biologic-augmentation
#5
Jarret M Woodmass, Robert F LaPrade, Nicholas A Sgaglione, Norimasa Nakamura, Aaron J Krych
No abstract text is available yet for this article.
July 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28717671/biomechanical-comparison-between-the-cruciate-suture-and-a-single-vertical-suture-used-for-arthroscopic-meniscal-repair-response
#6
Charles Milchteim, Eric A Branch, Ty Maughon, Jay Hughey, Adam W Anz
No abstract text is available yet for this article.
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28717670/biomechanical-comparison-between-the-cruciate-suture-and-a-single-vertical-suture-used-for-arthroscopic-meniscal-repair-letter-to-the-editor
#7
Ashraf Abdelkafy
No abstract text is available yet for this article.
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28714793/equivalent-knee-injury-and-osteoarthritis-outcome-scores-12-and-24-months-after-anterior-cruciate-ligament-reconstruction-results-from-the-swedish-national-knee-ligament-register
#8
Kristian Samuelsson, Robert A Magnussen, Eduard Alentorn-Geli, Ferid Krupic, Kurt P Spindler, Christer Johansson, Magnus Forssblad, Jón Karlsson
BACKGROUND: It is not clear whether Knee injury and Osteoarthritis Outcome Score (KOOS) results will be different 1 or 2 years after anterior cruciate ligament (ACL) reconstruction. PURPOSE: To investigate within individual patients enrolled in the Swedish National Knee Ligament Register whether there is equivalence between KOOS at 1 and 2 years after primary ACL reconstruction. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: This cohort study was based on data from the Swedish National Knee Ligament Register during the period January 1, 2005, through December 31, 2013...
July 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28712027/concomitant-meniscal-injury-in-anterior-cruciate-ligament-reconstruction%C3%A2-does-not-lead-to-poorer-short-term-post-operative-outcomes
#9
Amritpal Singh, Desmond Thiam Wei, Cheryl Tan Pei Lin, Shen Liang, Saumitra Goyal, Kimberly-Anne Tan, Brian Zhaojie Chin, Lingaraj Krishna
PURPOSE: The main objective was to compare post-operative outcomes in patients undergoing anterior cruciate ligament (ACL) reconstruction both with and without concomitant meniscus injury at a mean follow-up of 3.5 years. The secondary objective was to study the effect of different meniscal injury sites and treatment modalities on post-operative outcomes (PROS). METHODS: This is a retrospective analysis of a prospectively maintained database of patients undergoing ACL reconstruction at our tertiary institution between 2009 and 2012...
July 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28707050/tensile-strength-of-the-pullout-repair-technique-for-the-medial-meniscus-posterior-root-tear-a-porcine-study
#10
Masataka Fujii, Takayuki Furumatsu, Haowei Xue, Shinichi Miyazawa, Yuya Kodama, Tomohito Hino, Yusuke Kamatsuki, Toshifumi Ozaki
PURPOSE: The purpose of this study was to compare the load-to-failure of different common suturing techniques with a new technique for the medial meniscus posterior root tear (MMPRT). METHODS: Thirty porcine medial menisci were randomly assigned to three suturing techniques used for transtibial pullout repair of the MMPRT (n = 10 per group). Three different meniscal suture configurations were studied: the two simple suture (TSS) technique, the conventional modified Mason-Allen suture (MMA) technique, and the new MMA technique using the FasT-Fix combined with the Ultrabraid (F-MMA)...
July 14, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28706841/technique-for-transtibial-knotless-repair-of-lateral-meniscus-root-avulsion
#11
Emily Harnden, Timothy Lin, Adam Wilson, John B Reid
Tear of the meniscal root results in loss of circumferential hoop tension in the meniscus and increased tibiofemoral contact pressure, leading to cartilage wear. Repair of the meniscal root can restore function of the meniscus. Many techniques for root repair have recently been described. We present a technique for root repair using a transtibial socket and knotless suture technique that can be performed through standard arthroscopy portals.
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706814/tibial-allograft-transfer-for-medial-tibial-plateau-resurfacing
#12
Jonathan A Godin, Salvatore Frangiamore, Jorge Chahla, Mark E Cinque, Nicholas N DePhillipo, Robert F LaPrade
A large cartilage lesion of the tibial plateau with a deficient meniscus in a young patient is a challenging pathology for the orthopaedic surgeon due to the limited options available. While hemiarthroplasty procedures can be an option, the risk of revision in a young patient is high, and therefore a reconstructive procedure is advocated. The purpose of this Technical Note is to describe our technique for tibial plateau resurfacing, including the preparation and implantation of a medial tibial plateau and medial meniscal allograft, in a patient with a post-traumatic KD-4 knee dislocation with a medial tibial plateau rim fracture, medial meniscus deficiency, and medial tibiofemoral joint subluxation...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706808/transosseous-posterior-meniscal-root-reinsertion-using-knotless-anchor-for-tibial-fixation
#13
Alejandro Espejo-Baena, Alejandro Espejo-Reina, María Josefa Espejo-Reina, María Belén Martín-Castilla, Jaime Dalla-Rosa Nogales, Enrique Sevillano-Pérez
A technique for posterior meniscal root reinsertion is presented. With the arthroscope in the central transtendinous portal for a better view, a 5-mm transtibial tunnel is created with the aid of an anterior cruciate ligament guide open to 45°. A suture device, which consists of a long needle with an eyelet on its tip, is introduced through the tunnel with a suture thread inserted through the eyelet, while the meniscus is stabilized with a grasper inserted through the anterior portal. The meniscus is pierced with the device, and the suture thread is recovered with said grasper...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706802/medial-meniscus-posterior-root-tear-repair-using-a-2-simple-suture-pullout-technique
#14
Tarek Mohamed Samy, Wael A M Nassar, Zeiad Mohamed Zakaria, Ahmed Khaled Farrag Abdelaziz
Medial meniscus posterior root tear is one of the underestimated knee injuries in terms of incidence. Despite its grave sequelae, using simple but effective technique can maintain the native knee joint longevity. In the current note, a 2-simple-suture pullout technique was used to effectively reduce the meniscus posterior root to its anatomic position. The success of the technique depended on proper tool selection as well as tibial tunnel direction that allowed easier root suturing and better suture tensioning, without inducing any iatrogenic articular cartilage injury or meniscal tissue loss...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706793/medial-meniscus-posterior-root-repair-using-a-transtibial-technique
#15
Jarret M Woodmass, Rohith Mohan, Michael J Stuart, Aaron J Krych
The meniscal roots are critical in maintaining the normal shock absorbing function of the meniscus. If a meniscal root tear is left untreated, meniscal extrusion can occur rendering the meniscus nonfunctional resulting in degenerative arthritis. Two main repair techniques are described: (1) suture anchors (direct fixation) and (2) sutures pulled through a tibial tunnel (indirect fixation). Meniscal root repair using a suture anchor technique is technically challenging requiring a posterior portal and a curved suture passing device that can be difficult to manipulate within the knee...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28703122/synergistic-effect-of-electrical-conductivity-and-biomolecules-on-human-meniscal-cell-attachment-growth-and-proliferation-in-poly-%C3%AE%C2%B5-caprolactone-nanocomposite-scaffolds
#16
Janarthanan Gopinathan, Mamatha M Pillai, K Santosh Sahanand, B K Dinakar Rai, Rajendran Selvakumar, Amitava Bhattacharyya
Poly-ε-caprolactone (PCL) based nanocomposite scaffolds with different concentrations of carbon nanofillers (carbon nanofibers (CNF), nanographite and exfoliated graphite) have been studied to investigate the effect of electrical conductivity and biomolecules supplementation for enhanced human meniscal cell attachment, growth and proliferation. Incorporation of carbon nanofillers was found to improve mechanical and electrical properties. CNF based nanocomposite scaffolds showed highest electrical conductivity with significant improvements in mechanical properties (more than 50% tensile strength increase than PCL with 10% (w/w) CNF)...
July 13, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28698804/the-knee-meniscus-management-of-traumatic-tears-and-degenerative-lesions
#17
Philippe Beaufils, Roland Becker, Sebastian Kopf, Ollivier Matthieu, Nicolas Pujol
Meniscectomy is one of the most popular orthopaedic procedures, but long-term results are not entirely satisfactory and the concept of meniscal preservation has therefore progressed over the years. However, the meniscectomy rate remains too high even though robust scientific publications indicate the value of meniscal repair or non-removal in traumatic tears and non-operative treatment rather than meniscectomy in degenerative meniscal lesionsIn traumatic tears, the first-line choice is repair or non-removal...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28698718/the-holy-grail-of-orthopedic-surgery-mesenchymal-stem-cells-their-current-uses-and-potential-applications
#18
REVIEW
Roberto Berebichez-Fridman, Ricardo Gómez-García, Julio Granados-Montiel, Enrique Berebichez-Fastlicht, Anell Olivos-Meza, Julio Granados, Cristina Velasquillo, Clemente Ibarra
Only select tissues and organs are able to spontaneously regenerate after disease or trauma, and this regenerative capacity diminishes over time. Human stem cell research explores therapeutic regenerative approaches to treat various conditions. Mesenchymal stem cells (MSCs) are derived from adult stem cells; they are multipotent and exert anti-inflammatory and immunomodulatory effects. They can differentiate into multiple cell types of the mesenchyme, for example, endothelial cells, osteoblasts, chondrocytes, fibroblasts, tenocytes, vascular smooth muscle cells, and sarcomere muscular cells...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28697072/repair-of-displaced-partial-articular-fracture-of-the-distal-femur-the-hoffa-fracture
#19
Kenneth A Egol, Kari Broder, Nina Fisher, Sanjit R Konda
PURPOSE: The Hoffa fracture is a rare fracture pattern consisting of a unicondylar posterior fracture of the distal femur. This video demonstrates a case of Hoffa fracture repair using headless screw compression. METHODS: Hoffa fractures are intra-articular in nature. Given that isolated Hoffa fractures are rare, there is little information available as to the best management of this injury. However, several small studies have demonstrated good-to-excellent functional results after anatomical reduction and rigid fixation of the Hoffa fracture, followed by early mobilization...
August 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28680898/factors-affecting-the-outcomes-of-arthroscopically-repaired-traumatic-vertical-longitudinal-medial-meniscal-tears
#20
Erdal Uzun, Abdulhamit Misir, Turan Bilge Kizkapan, Mustafa Ozcamdalli, Soner Akkurt, Ahmet Guney
BACKGROUND: Although numerous studies have assessed arthroscopic medial meniscal repairs, few studies have focused on factors affecting outcomes of vertical longitudinal and bucket-handle repairs. PURPOSE: To evaluate the factors affecting clinical outcomes of arthroscopically repaired traumatic vertical longitudinal and bucket-handle medial meniscal tears. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: A total of 223 patients underwent arthroscopic repair for medial meniscal tears between 2007 and 2012; 140 patients had isolated tears or concurrent anterior cruciate ligament (ACL) reconstruction, and 80 patients (76 men, 4 women; mean age, 29...
June 2017: Orthopaedic Journal of Sports Medicine
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