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https://www.readbyqxmd.com/read/27916189/editorial-commentary-lateral-extra-articular-reconstructions-with-anterior-cruciate-ligament-surgery-are-these-operative-procedures-supported-by-in%C3%A2-vitro-biomechanical-studies
#1
EDITORIAL
Frank R Noyes
There remains controversy on the role of a concurrent lateral extra-articular procedure with anterior cruciate ligament (ACL) reconstruction. Previous biomechanical studies often are historical and inconclusive. Studies show the anterolateral ligament and iliotibial band are secondary restraints and, when injured in conjunction with the ACL, produce gross (Grade 3) pivot-shift subluxations. Recent robotic studies show a well-placed bone-patellar tendon-bone reconstruction does restore time-zero kinematics with a negative pivot-shift...
December 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27915026/effects-of-model-definitions-and-parameter-values-in-finite-element-modeling-of-human-middle-ear-mechanics
#2
Daniel De Greef, Felipe Pires, Joris J J Dirckx
BACKGROUND: Despite continuing advances in finite element software, the realistic simulation of middle ear response under acoustic stimulation continues to be challenging. One reason for this is the wide range of possible choices that can be made during the definition of a model. Therefore, an explorative study of the relative influences of some of these choices is potentially very helpful. METHOD: Three finite element models of the human middle ear were constructed, based on high-resolution micro-computed tomography scans from three different human temporal bones...
November 30, 2016: Hearing Research
https://www.readbyqxmd.com/read/27909681/double-bundle-all-inside-posterior-cruciate-ligament-reconstruction-a-technique-using-2%C3%A2-separate-autologous-grafts
#3
Roy A G Hoogeslag, Bart W Oudelaar, Rianne Huis In't Veld, Reinoud W Brouwer
In a double-bundle posterior cruciate ligament reconstruction, several surgical techniques are available. Compared with other techniques, the advantages of the all-inside technique and cortical suspension devices with variable loop length are that shorter grafts can be used, tendons can be quadrupled, and a double-bundle posterior cruciate ligament reconstruction can be performed with autologous grafts. Furthermore, the all-inside technique provides independent outside-in socket reaming and is soft tissue, cortex, and bone sparing because no full diameter tunnels but sockets are created with a small diameter guide pin, which can transform into a retrograde drill...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27909674/minimally-invasive-quadriceps-tendon-harvest-and-graft-preparation-for-all-inside-anterior-cruciate-ligament-reconstruction
#4
Harris S Slone, William B Ashford, John W Xerogeanes
The quadriceps tendon is an infrequently used graft option for anterior cruciate ligament reconstruction despite favorable clinical results in the literature with low donor site morbidity. It is a versatile graft that can be harvested with bone or as a soft tissue graft alone. In addition, it can be used for anatomic, double-bundle, transtibial, and all-inside reconstructions. The unique characteristics of the quadriceps tendon allow for the ability to harvest a single-bundle large-diameter graft and minimize disruption of normal anatomy, which makes the quadriceps tendon an excellent choice for all-inside techniques...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27909671/endoscopic-resection-of-the-tibialis-anterior-tendon-bursa
#5
Tun Hing Lui
The tibialis anterior tendon bursa is located between the tibialis anterior tendon and the medial cuneiform bone and close to the tendon insertion. Bursitis can occur as a result of excessive local friction, infection, arthritides, or direct trauma. Endoscopic resection of the bursa is indicated in case of symptomatic bursitis that is not responding to conservative treatment or infection is suspected. It is contraindicated if there is skin infection at the portal sites. The purpose of this technical note is to describe a minimally invasive approach of endoscopic resection of the tibialis anterior tendon bursa through anterior tibial tendoscopy...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27909668/triple-row-modification-of-the-suture-bridge-technique-for-arthroscopic-rotator-cuff-repair
#6
Roger V Ostrander, Jarrod Smith, Michael Saper
Recent advances to improve outcomes in rotator cuff repair include using arthroscopic double-row suture-bridge techniques in an effort to reconstruct the rotator cuff footprint and improve fixation. However, when using this technique for larger tears, it can be difficult to get the lateral portion of the rotator cuff into an anatomic position. This report describes a triple-row modification of the suture-bridge technique that results in significantly more footprint contact area and contact pressure compared with the double-row and standard suture-bridge techniques...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27909125/ageing-deep-vein-thrombosis-and-male-gender-predict-poor-outcome-after-acute-achilles-tendon-rupture
#7
E Domeij- Arverud, P Anundsson, E Hardell, G Barreng, G Edman, A Latifi, F Labruto, P W Ackermann
AIMS: Patients with an acute Achilles tendon rupture (ATR) take a long time to heal, have a high incidence of deep vein thrombosis (DVT) and widely variable functional outcomes. This variation in outcome may be explained by a lack of knowledge of adverse factors, and a subsequent shortage of appropriate interventions. PATIENTS AND METHODS: A total of 111 patients (95 men, 16 women; mean age 40.3, standard deviation 8.4) with an acute total ATR were prospectively assessed...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27908413/trace-element-and-cytokine-concentrations-in-patients-with-fibrodysplasia-ossificans-progressiva-fop-a-case-control-study
#8
Laura Hildebrand, Timo Gaber, Peter Kühnen, Rolf Morhart, Heinz Unterbörsch, Lutz Schomburg, Petra Seemann
Fibrodysplasia Ossificans Progressiva (FOP) is a rare inherited disease characterized by progressive heterotopic ossification. Disease onset, severity and symptoms vary between FOP patients, as does the frequency and activity of so-called flare-ups, during which tendons, ligaments, muscle and soft tissue are replaced by bone. Traumata, infections or other stressors are known inducers of flare-ups, and the hormone Activin A may be involved in disease activity; however, reliable biomarkers for FOP activity are missing, and the basal trace element and inflammatory state of patients are unknown...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27907934/restriction-of-postoperative-joint-loading-in-a-murine-model-of-anterior-cruciate-ligament-reconstruction-botulinum-toxin-paralysis-and-external-fixation
#9
Amir Lebaschi, Xiang-Hua Deng, Nathan W Coleman, Christopher L Camp, Jianchun Zong, Andrew Carbone, Camila B Carballo, Guang-Ting Cong, Zoe M Album, Scott A Rodeo
Control of knee motion in small animal models is necessary to study the effect of mechanical load on the healing process. This can be especially challenging in mice, which are being increasingly used for various orthopedic reconstruction models. We explored the feasibility of botulinum toxin (Botox; Allergan, Dublin, Ireland) paralysis and a newly designed external fixator to restrict motion of the knee in mice undergoing anterior cruciate ligament (ACL) reconstruction. Nineteen C57BL/6 mice were allocated to two groups: (1) Botox group (n = 9) and (2) external fixator group (n = 10)...
December 1, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27904225/the-inferior-medial-genicular-artery-and-its-vascularization-of-the-pes-anserinus-superficialis-a-cadaveric-study
#10
Lena Hirtler, Manuel Ederer, Mike Faber, Patrick Weninger
BACKGROUND: A common method for reconstruction of the anterior cruciate ligament (ACL) is it's replacement by a free avascular graft, using the gracilis and/or semitendinosus tendons. These grafts pass a vulnerable phase in the ligamentization-process during the 1(st) year after reconstruction. The aims of this study were first to evaluate the vascularization of the pes anserinus superficialis (PAS) by the inferior medial genicular artery (IMGA) and second to develop a pedunculated surgical technique for ACL reconstruction, to preserve a maximal amount of natural vascularization of the tendons inserting at the PAS...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27904216/scapholunate-ligament-reconstruction-using-the-palmaris-longus-tendon-and-suture-anchor-fixation-in-chronic-scapholunate-instability
#11
Maulik Jagdish Gandhi, Timothy Paul Knight, Peter John Ratcliffe
BACKGROUND: Multiple reconstruction techniques have been described in the management of chronic scapholunate (SL) instability, either based on the capsulodesis or tenodesis principle. It is uncertain which surgical method produces the best patient outcomes. We describe results of a technique using palmaris longus (PL) tendon for surgical reconstruction of the SL ligament and provide functional outcomes scores. MATERIALS AND METHODS: We surgically reconstructed the SL ligament using a PL tendon graft secured with Mitek(®) bone anchors...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27904023/early-embryonic-development-of-long-tendons-in-the-human-foot
#12
Masahito Yamamoto, Yasuhiro Shiraishi, Kei Kitamura, Zhe Wu Jin, Gen Murakami, Jose Francisco Rodríguez-Vázquez, Shin-Ichi Abe
To examine a common plantar tendinous plate for long flexors of the toe and fingers in human embryos, we observed sections of 10 embryos at 5-6 weeks (crown-rump length or CRL 15-21 mm). The heel or tuber of the calcaneus was underdeveloped in 3 embryos with CRL 15 mm and the talus appeared not to be piled up on the calcaneus but these two bones were arranged along the lateromedial axis. As reported in the hand, we demonstrated, in the deep side of tarsal bones, a common tendinous plate formed by a joining of the flexor halluces longus and flexor digitorum longus tendons...
2016: Okajimas Folia Anatomica Japonica
https://www.readbyqxmd.com/read/27903590/anterior-cruciate-ligament-derived-stem-cells-transduced-with-bmp2-accelerate-graft-bone-integration-after-acl-reconstruction
#13
Yohei Kawakami, Koji Takayama, Tomoyuki Matsumoto, Ying Tang, Bing Wang, Yutaka Mifune, James H Cummins, Ryan J Warth, Ryosuke Kuroda, Masahiro Kurosaka, Freddie H Fu, Johnny Huard
BACKGROUND: Strong graft-bone integration is a prerequisite for successful graft remodeling after reconstruction of the anterior cruciate ligament (ACL) using soft tissue grafts. Novel strategies to accelerate soft tissue graft-bone integration are needed to reduce the need for bone-tendon-bone graft harvest, reduce patient convalescence, facilitate rehabilitation, and reduce total recovery time after ACL reconstruction. HYPOTHESIS: The application of ACL-derived stem cells with enhanced expression of bone morphogenetic protein 2 (BMP2) onto soft tissue grafts in the form of cell sheets will both accelerate and improve the quality of graft-bone integration after ACL reconstruction in a rat model...
November 30, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27900541/tendon-transfer-to-unossified-bone-in-a-porcine-model-potential-implications-for-early-tibialis-anterior-tendon-transfers-in-children-with-clubfeet
#14
Matthew A Halanski, Sam Abrams, Rachel Lenhart, Ellen Leiferman, Teresa Kaiser, Emily Pierce, Rachel Rebekah Franklin, Dayton Opel, Kenneth J Noonan, Thomas D Crenshaw
PURPOSE: Tibialis anterior tendon transfers (TATT) are commonly performed in young children following Ponseti casting for clubfeet. The classic TATT involves advancing the tendon through a hole drilled in the ossified cuneiform. The aim of this study was to determine if tendons transferred through unossified bones have untoward effects on subsequent bone development. METHOD: Twenty-five piglets underwent one of five surgical procedures. An 18-gauge needle was then used to place a tunnel through the bony or cartilaginous portion of the calcaneus (through direct visualization) and isolated slips of the flexor digitorum superficialis (FDS) were placed through the tunnels, as determined by surgical procedure...
November 30, 2016: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/27900311/biological-enhancement-of-graft-tunnel-healing-in-anterior-cruciate-ligament-reconstruction
#15
Maristella F Saccomanno, Luigi Capasso, Luca Fresta, Giuseppe Milano
The sites where graft healing occurs within the bone tunnel and where the intra-articular ligamentization process takes place are the two most important sites of biological incorporation after anterior cruciate ligament (ACL) reconstruction, since they help to determine the mechanical behavior of the femur-ACL graft-tibia complex. Graft-tunnel healing is a complex process influenced by several factors, such as type of graft, preservation of remnants, bone quality, tunnel length and placement, fixation techniques and mechanical stress...
July 2016: Joints
https://www.readbyqxmd.com/read/27900289/deducing-a-mechanism-of-all-musculoskeletal-injuries
#16
Geoffrey Verrall, Bronwyn Dolman
BACKGROUND: The mechanism of musculoskeletal (MSK) injuries is not well understood. This research applies principles of elastic motion to the anatomy and movement patterns of MSK structures. From this an insight into the application and timing of forces on MSK structures can be established and the mechanism/s of injury derived. METHODS CURRENT KNOWLEDGE: All MSK structures demonstrate varying degrees of elasticity. Movement occurs primarily as a consequence of Muscle Tendon Unit (MTU) shortening...
April 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27898509/acute-achilles-tendon-ruptures-an-update-on-treatment
#17
Anish R Kadakia, Robert G Dekker, Bryant S Ho
Acute rupture of the Achilles tendon is common and seen most frequently in people who participate in recreational athletics into their thirties and forties. Although goals of treatment have not changed in the past 15 years, recent studies of nonsurgical management, specifically functional bracing with early range of motion, demonstrate rerupture rates similar to those of tendon repair and result in fewer wound and soft-tissue complications. Satisfactory outcomes may be obtained with nonsurgical or surgical treatment...
November 24, 2016: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/27896364/-proximal-rupture-of-the-hamstring-tendon-from-clinical-presentation-to-diagnosis-and-therapy
#18
S Bauer, M Riegger, K J Friedrich, W Reichert, W G Blakeney, C Haag
Rupture of the proximal tendon enthesis of the hamstring muscle (ICM) accounts for approximately 10% of all injuries of the ICM. It occurs most commonly in athletes and active middle-aged individuals. The complete rupture of all three tendons in active patients is generally seen as an indication for surgical repair of the tendon enthesis; however, the correct diagnosis is often not reached in a timely manner. This can lead to prolonged symptoms with pain, weakness and neuralgia. Operative treatment consists of anchor repair of the tendons resulting in good clinical outcome in several case series...
November 28, 2016: Der Unfallchirurg
https://www.readbyqxmd.com/read/27895704/the-extracellular-microscape-governs-mesenchymal-stem-cell-fate
#19
REVIEW
William J Hadden, Yu Suk Choi
Each cell forever interacts with its extracellular matrix (ECM); a stem cell relies on this interaction to guide differentiation. The stiffness, nanotopography, protein composition, stress and strain inherent to any given ECM influences stem cell lineage commitment. This interaction is dynamic, multidimensional and reciprocally evolving through time, and from this concerted exchange the macroscopic tissues that comprise living organisms are formed. Mesenchymal stem cells can give rise to bone, cartilage, tendon and muscle; thus attempts to manipulate their differentiation must heed the physical properties of incredibly complex native microenvironments to realize regenerative goals...
2016: Journal of Biological Engineering
https://www.readbyqxmd.com/read/27895450/dermatofibrosarcoma-protuberans-a-case-report-and-review-of-the-literature
#20
D Paramythiotis, G Stavrou, D Panagiotou, G Petrakis, A Michalopoulos
BACKGROUND: Dermatofibrosarcoma protuberans (DFSP) represents less than 0.1% of all tumors, but it is considered the most common skin sarcoma. Wide local excision (=5 cm) has been largely replaced by Mohs micrographic surgery; however, recurrence is not rare. Description of the case: A 35-year-old man presented with a large tumor on the upper side of his back and underwent local excision with the possible preoperative diagnosis of lipoma. Upon histological examination, the diagnosis of DFSP was made, and the patient underwent wide local excision with skin flap reconstruction and was referred for adjuvant radiotherapy...
January 2016: Hippokratia
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