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Tendon Repair

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https://www.readbyqxmd.com/read/29679723/comparison-of-hook-plate-with-versus-without-double-tunnel-coracoclavicular-ligament-reconstruction-for-repair-of-acute-acromioclavicular-joint-dislocations-a-prospective-randomized-controlled-clinical-trial
#1
Jian Yin, Zhaoyang Yin, Ge Gong, Chao Zhu, Chao Sun, Xinhui Liu
PURPOSE: This study was designed to compare the surgical outcomes of a hook plate with double-tunnel coracoclavicular (CC) ligament reconstruction by conjoined tendon transfer versus single hook plate surgery for the repair of acute type of Rockwood type III and V acromioclavicular (AC) joint dislocations. METHODS: The study cohort included 62 patients with acute (within 6 weeks after trauma) Rockwood type III and V AC joint dislocations who underwent surgery from February 2012 to September 2015...
April 18, 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29678676/an-asymmetric-chitosan-scaffold-for-tendon-tissue-engineering-in-vitro-and-in-vivo-evaluation-with-rat-tendon-stem-progenitor-cells
#2
Erman Chen, Ling Yang, Chenyi Ye, Wei Zhang, Jisheng Ran, Deting Xue, Zhengke Wang, Zhijun Pan, Qiaoling Hu
The poor healing capacity and typically incomplete regeneration of injured tendons has made tendon repair as a primary clinical concern. Several methods for repairing injured tendons have been developed in the last decade. Tendon regeneration using current tissue engineering techniques requires advanced biomaterials to satisfy both microstructural and mechanical criteria. In this study, a novel chitosan (CS)-based scaffold with asymmetric structure was fabricated using a self-deposition technique. The fabricated scaffolds were assessed with regard to the microstructural and mechanical demands of cell ingrowth and the prevention of peritendinous adhesion...
April 17, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29675510/isolated-subscapularis-tendon-tear-in-a-skeletally-immature-soccer-player
#3
Paolo Avanzi, Luca Dei Giudici, Roberto Giovarruscio, Antonio Gigante, Claudio Zorzi
Subscapularis injury in adolescents, usually associated to an avulsion fracture of the lesser humeral tuberosity, accounts for less than 2% of all fractures of the proximal humerus. Isolated tears of the subscapularis tendon without a history of dislocation and associated avulsion fractures are an even rarer occurrence, and treatment is controversial. This article describes a rare case of a 12-year-old suffering from an isolated subscapularis tear and discusses its management. The patient was evaluated at presentation, and at 1 to 2...
March 2018: Joints
https://www.readbyqxmd.com/read/29675500/migration-of-mesenchymal-stem-cells-of-bursal-tissue-after-rotator-cuff-repair-in-rats
#4
Elem Safi, Andreas Ficklscherer, Maryna Bondarava, Oliver Betz, Anja Zhang, Volkmar Jansson, Peter E Müller
Purpose  The purpose of this study is to verify migration of mesenchymal stem cells of bursal tissue into the healing site after rotator cuff repair in rats. Methods  Fischer rats and green fluorescent protein (GFP)-transgenic rats were used. Bursal tissue from GFP rats was isolated and transplanted into tendon repair sites in Fischer rats. We examined the histology of the rotator cuff and the proportion of GFP-positive cells in the repaired rotator cuff 1, 3, and 6 weeks after surgery. Results  Cell migration was observed during the third and sixth week after surgery...
March 2018: Joints
https://www.readbyqxmd.com/read/29674493/effect-of-electroacupuncture-stimulation-on-long-term-recovery-following-achilles-tendon-rupture-in-a-rat-model
#5
Miwa Imaeda, Tatsuya Hojo, Hiroshi Kitakoji, Kazuto Tanaka, Megumi Itoi, Motohiro Inoue
AIMS: In this study we examined the effect of electroacupuncture (EA) stimulation on the mechanical strength of the rat Achilles tendon after long-term recovery. METHODS: Using 20 rats, an Achilles tendon rupture model was created in an invasive manner. The rats were assigned to one of three groups, that received EA treatment (EA group), minimal acupuncture (MA group) or remained untreated (Control group). In the EA group, EA stimulation (5 ms, 50 Hz, 20 µA, 20 min) was applied to the rupture region over a period of 90 days (five times/week)...
April 19, 2018: Acupuncture in Medicine: Journal of the British Medical Acupuncture Society
https://www.readbyqxmd.com/read/29672913/knockout-of-hyaluronan-synthase-1-but-not-3-impairs-formation-of-the-retrocalcaneal-bursa
#6
Katie J Sikes, Kristen Renner, Jun Li, K Jane Grande-Allen, Jennifer P Connell, Valbona Cali, Ronald J Midura, John D Sandy, Anna Plaas, Vincent M Wang
Hyaluronan (HA), a high molecular weight non-sulfated glycosaminoglycan, is an integral component of the extracellular matrix of developing and mature connective tissues including tendon. There are few published reports quantifying HA content during tendon growth and maturation, or detailing its effects on the mechanical properties of the tendon extracellular matrix. Therefore, the goal of the current study was to examine the role of HA synthesis during post-natal skeletal growth and maturation, and its influence on tendon structure and biomechanical function...
April 19, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29672303/bevacizumab-improves-achilles-tendon-repair-in-a-rat-model
#7
Herbert Tempfer, Alexandra Kaser-Eichberger, Christine Lehner, Renate Gehwolf, Stefanie Korntner, Nadja Kunkel, Andrea Wagner, Moritz Gruetz, Ludwig M Heindl, Falk Schroedl, Andreas Traweger
BACKGROUND/AIMS: Effective wound-healing generally requires efficient re-vascularization after injury, ensuring sufficient supply with oxygen, nutrients, and various cell populations. While this applies to most tissues, tendons are mostly avascular in nature and harbor relatively few cells, probably contributing to their poor regenerative capacity. Considering the minimal vascularization of healthy tendons, we hypothesize that controlling angiogenesis in early tendon healing is beneficial for repair tissue quality and function...
April 16, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29668776/muscle-regeneration-through-therapy-with-estromal-stem-cells-in-injury-of-infraespinhosus-muscle-of-sheep
#8
Aline Grama Moreira Brandão, Angélica Consalter, Juliana da Silva Leite, Helia Zamprogno, Ana Maria Reis Ferreira
PURPOSE: To evaluate the effects of rotator cuff muscle regeneration in sheep and establish an experimental model for the use of autologous stem cells as a treatment option for tendon injuries. METHODS: Infrared muscle tenotomies and Penrose drain implantation were performed on 12 shoulders of six clinically healthy adult sheep. After 60 days, the tendons were submitted to tissue repair, drainage removal, and divided into two groups according to the use of autologous stromal stem cells for treatment...
March 2018: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29667905/essential-role-of-mohawk-for-tenogenic-tissue-homeostasis-including-spinal-disc-and-periodontal-ligament
#9
Ryo Nakamichi, Kensuke Kataoka, Hiroshi Asahara
Tendons and ligaments play essential roles in connecting muscle and bone and stabilizing the connections between bones. The damage to tendons and ligaments caused by aging, injury, and arthritis induces the dysfunction of the musculoskeletal system and reduces the quality of life. Current therapy for damaged tendons and ligaments depends on self-repair; however, it is difficult to reconstruct normal tissue. Regeneration therapy for tendons and ligaments has not been achieved, partly because the mechanism, cell biology, and pathophysiology of tendon and ligament development remain unclear...
April 18, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29665604/-foreign-material-free-anterior-cruciate-ligament-repair-with-hamstring-graft-felmet-technique
#10
Marc Chmielnicki, Wolfram Siebert, Axel Prokop
Rupture of the anterior cruciate ligament (ACL) is a common sports injury. Shear forces can damage the articular cartilage and lead to early osteoarthritis. Ligamentary stabilisation of the knee is necessary. Today, arthroscopic ACL repair is a standard knee procedure. Transplant fixation is often performed using implants, e.g. interference screws. The foreign material-free procedure using the Felmet technique enables biological, mechanically stable fixation of the hamstring tendon graft. We demonstrate the surgical technique, including meniscus suture and a video case study...
April 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/29662762/local-administration-of-trolox-a-vitamin-e-analog-reduced-tendon-adhesion-in-a-chicken-model-of-flexor-digitorum-profundus-tendon-injury
#11
Yuk Wa Lee, Sai Chuen Fu, Tsui Yu Mok, Kai Ming Chan, Leung Kim Hung
Background: Hand flexor tendon injuries are compromised with tendon adhesion. Tendon adhesion forms between flexor tendon and tendon sheath, reduces the range of motion of fingers, and affects their function. Oxidative stress is increased in flexor tendon after injury and might play a role in tendon adhesion formation. Trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid), a water-soluble analog of vitamin E, is antioxidative. Trolox reduced oxidative stress and the expression of fibrotic cytokines in the bile gut ligation animal model...
July 2017: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29662599/-spontaneous-simultaneous-bilateral-rupture-of-the-quadriceps-tendon-in-patients-with-parathyroid-adenoma-case-report-and-literature-review
#12
Amour Espoir Mokoko-Louckou, Badarou Chaibou, Ismail Abdouli, Kevin Parfait Bienvenu Bouhelo-Pam, Mohammed El Idrissi, Mohammed Shimi, Abdelhalim El Ibrahimi, Abdelmajid El Mrini
Spontaneous as well as bilateral and simultaneous rupture of the quadriceps tendon is rare. We report the case of a 53-year old patient followed up for parathyroid adenoma complicated by renal failure, admitted for spontaneous bilateral rupture of the two quadriceps tendons. He underwent surgical repair allowing him to maintain his autonomy.
2018: Pan African Medical Journal
https://www.readbyqxmd.com/read/29658814/combined-spring-and-deltoid-ligament-repair-in-adult-acquired-flatfoot
#13
Caio Nery, André Vitor Kerber C Lemos, Fernando Raduan, Nacime Salomão B Mansur, Daniel Baumfeld
BACKGROUND: Adult-acquired flatfoot deformity (AAFD) is usually due to a combination of mechanical failure of the osteoligamentous complex that maintains the medial longitudinal arch of the foot and attenuation or complete tear of the posterior tibial tendon. Magnetic resonance imaging studies in patients with flatfoot deformities have reported the posterior tibial tendon to be pathologic in up to 100% of patients, the spring ligament in up to 87%, and the deltoid ligament in 33%. Many studies in the literature describe reconstruction of the spring ligament or the deltoid ligament associated with AAFD, but there is no study in which both (spring and deltoid) ligaments are reconstructed at the same time...
April 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29658519/biomechanical-evaluation-of-tendon-connection-with-novel-suture-techniques
#14
Zhe Chen, Jun Wang, Jia-Sen Wei, Zhao-Yang Hou, Min Li, Qi-Xin Chen
PURPOSE: Achilles tendon rupture is a severe injury with poor curative effect due to its anatomical characteristic and mechanical peculiarity. Internal fixation of limited loop (IFLL) with steel-wire has been applied on patients with tendon rupture to fix the broken ends before physical rehabilitation. The purpose of this study is to investigate the biomechanical property and radiological characteristic of such suture technique for the repairment of tendon rupture. METHODS: Tendons of pigs' hint feet were separated for the biomechanical study...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29657480/a-novel-method-for-reducing-gap-formation-in-tendon-repair
#15
Ryan Dean, Paul Sethi
Background: This study investigates gap formation in tendon repair using a novel tensioning method. Hypothesis: The novel stitch will demonstrate less gap formation than the other suture configurations tested. Methods: Porcine tendons stitched with classic Krackow stitch configurations were compared to a Krackow stitch modified with a proximal Tension-Assist Loop. Each group was cyclically loaded followed by analysis of the tendon-suture construct for gap formation...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29657473/risk-factors-for-complications-after-primary-repair-of-achilles-tendon-ruptures
#16
Christian A Pean, Anthony Christiano, William J Rubenstein, Sanjit R Konda, Kenneth A Egol
Purpose: To identify patient characteristics associated with adverse events in Achilles tendon rupture (ATR) surgical repair cases. Methods: A high risk (HR) cohort group of ATR patients were compared to healthy controls in the ACSNSQIP database with multivariate regression analysis. Results: Overall, 2% (n = 23) of the group sustained an AE postoperatively, most commonly superficial SSI (0.9%, n = 10). Multivariate analysis did not reveal any patient characteristics to be significantly associated with the occurrence of an AE or superficial SSI...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29656809/lateral-knee-compartment-portals-a-cadaveric-study-defining-a-posterolateral-viewing-safety-zone
#17
Brian Dilworth, Victor Fehrenbacher, John Nyland, Jamie Clark, Joseph W Greene
PURPOSE: This study attempted to define a reproducible "safe zone" based on extra- and intra-articular knee anatomy for placing one or 2 accessory portals in the lateral tibiofemoral compartment for posterolateral region viewing. METHODS: Standard portals were created in 10 cadaveric knees to enable posterolateral region arthroscopic lateral tibiofemoral joint compartment viewing. After identifying the lateral knee surface tissue "soft spot," an accessory posterolateral portal (A) was created using an 18-gauge spinal needle and 4-mm cannula under direct visualization of a 70° arthroscope through the anteromedial portal...
April 12, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29650048/a-comparison-of-the-stem-cell-characteristics-of-murine-tenocytes-and-tendon-derived-stem-cells
#18
Katie Joanna Lee, Peter David Clegg, Eithne Josephine Comerford, Elizabeth Gail Canty-Laird
Tendon is a commonly injured soft musculoskeletal tissue, however, poor healing potential and ineffective treatment strategies result in persistent injuries and tissue that is unable to perform its normal physiological function. The identification of a stem cell population within tendon tissue holds therapeutic potential for treatment of tendon injuries. This study aimed, for the first time, to characterise and compare tenocyte and tendon-derived stem cell (TDSC) populations in murine tendon. Tenocytes and TDSCs were isolated from murine tail tendon...
April 12, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29627930/flexor-digitorum-longus-tendon-transfer-to-the-navicular-tendon-to-tendon-repair-is-stronger-compared-with-interference-screw-fixation
#19
Daniel Marsland, Joanna M Stephen, Toby Calder, Andrew A Amis, James D F Calder
PURPOSE: To assess whether early rehabilitation could be safe after flexor digitorum longus (FDL) tendon transfer, the current biomechanical study aimed to measure tendon displacement under cyclic loading and load to failure, comparing a traditional tendon-to-tendon (TT) repair with interference screw fixation (ISF). METHODS: 24 fresh-frozen cadaveric below knee specimens underwent FDL tendon transfer. In 12 specimens a TT repair was performed via a navicular bone tunnel...
April 7, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29625184/clinical-results-of-peroneal-tendon-repair-in-a-retrospective-series-of-30-patients
#20
C Bourgault, C Pougès, C Szymanski, C Lalanne, A Thioun, K Soudy, C Maynou
INTRODUCTION: Peroneal tendinopathy is an under-diagnosed pathology, mainly triggered by ankle sprain. Failure of medical treatment often leads to surgery, with modalities adapted to the lesion type. The present study aimed to assess clinical and functional results of tendon repair and to analyze the influence of hindfoot alignment on quality of outcome. The study hypothesis was that hindfoot varus impairs medium-term results. MATERIAL AND METHODS: A retrospective series of 30 patients undergoing peroneal tendon repair or tenodesis was analyzed at a mean 20 months' follow-up...
April 3, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
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