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Tania E Sakanaka, Jaspret Gill, Martin D Lakie, Raymond F Reynolds
Individuals may stand with a range of ankle angles. Furthermore, shoes or floor surfaces may elevate or depress their heels. Here we ask how these situations impact ankle stiffness and balance. We performed two studies (each with 10 participants) in which the triceps surae, Achilles tendon and aponeurosis were stretched either passively, by rotating the support surface, or actively by leaning forward. Participants stood freely on footplates which could rotate around the ankle joint axis. Brief, small stiffness-measuring perturbations (<0...
2018: PloS One
Sean Baran, Jeffrey G Belisle, Erin K Granger, Robert Z Tashjian
OBJECTIVES: To analyze the functional and radiographic outcomes of anatomic coracoclavicular ligament reconstruction (ACCR) using allograft tendon without interference screw fixation. DESIGN: Retrospective nonrandomized study. SETTING: Level I trauma center (University Hospital). PATIENTS: Seventeen patients (mean age of 44 years) with Rockwood III through V acromioclavicular joint disruptions. Twelve of 17 patients had a primary reconstruction, including 4 patients sustaining their injuries as part of a polytrauma incident...
April 2018: Journal of Orthopaedic Trauma
Michael James Eastwood, And Ajith Paulose George
Intraoperative identification of the spinal accessory nerve (SAN) is key in reducing nerve injury. This study aims to explore the surgical anatomy of the SAN and 2 landmarks for its identification-the sternocleidomastoid branch of the occipital artery (SBOA) and superior sternocleidomastoid tendon (SST)-to propose a novel method of identifying the SAN during surgical neck dissections. Twelve cadavers underwent bilateral level II-V neck dissection identifying the SAN, SBOA, and SST. Variation was documented and distance between landmarks and the SAN measured...
March 1, 2018: Otolaryngology—Head and Neck Surgery
Tsuyoshi Sasaki, Hitoshi Shitara, Atsushi Yamamoto, Noritaka Hamano, Tsuyoshi Ichinose, Daisuke Shimoyama, Tsutomu Kobayashi, Toshihisa Osawa, Yoshito Tsushima, Kenji Takagishi, Hirotaka Chikuda
BACKGROUND: Supraspinatus muscle atrophy is typically assessed by the occupation ratio of the cross-sectional area of the muscle belly to the supraspinatus fossa at the medial border of the coracoid process in a slice along the oblique-sagittal plane on MRI. Previous studies have shown that the occupation ratio of the supraspinatus changed soon after rotator cuff repair compared with before surgery. However, no studies have examined the perioperative change in the muscle volume assessed with 3-dimensional measurement...
March 1, 2018: American Journal of Sports Medicine
Hongbo Tan, Dean Wang, Amir H Lebaschi, Ian D Hutchinson, Liang Ying, Xiang-Hua Deng, Scott A Rodeo, Russell F Warren
BACKGROUND: Many orthopaedic surgical procedures involve reattachment of a single tendon to bone. Whether tendon-to-bone healing is better facilitated by tendon fixation within a bone tunnel or on a cortical surface is unknown. The purpose of this study was to evaluate tendon-healing within a bone tunnel compared with that on the cortical surface in a rabbit model of biceps tenodesis. METHODS: Thirty-two rabbits (24 weeks of age) underwent unilateral proximal biceps tenodesis with tendon fixation within a bone tunnel (BT group) or on the cortical surface (SA [surface attachment] group)...
March 21, 2018: Journal of Bone and Joint Surgery. American Volume
Michael Oeverhaus, Margarethe Fischer, Herbert Hirche, Anke Schlüter, Joachim Esser, Anja K Eckstein
BACKGROUND/AIMS: We performed a retrospective analysis to examine clinical results, establish a dose-effect coefficient and analyze the long-term efficacy of tendon elongation with bovine pericardium (Tutopatch®) for surgical correction of severe esotropia, occurring after three-wall orbital decompression for dysthyroid optic neuropathy in patients with Graves' orbitopathy (GO). METHODS: Tendon elongation of the medial rectus muscle (MR) was performed in our institution using an interponate of bovine pericardium in 60 patients (27 underwent unilateral and 33 bilateral surgery)...
March 20, 2018: Strabismus
Arash Mehdizadeh, Bruce S Gardiner, Michael Lavagnino, David W Smith
The composition of extracellular matrix (ECM) in tendon depends on the secretion profile of resident cells known as tenocytes. For tissues with a mechanical role like tendon, mechanical strain is known to play an important role in determining the secretion profile of resident cells. Previously we explored the idea of estimating average concentrations of ECM molecules as a function of tendon strain magnitude and number of loading cycles. Specifically, we developed a model of the mechanical fatigue damage of tendon collagen fibers and introduced elementary cell responses (ECRs) by which local cellular-level responses to the strain environment, combined with the fatigue damage model, were scaled up to predict tissue-level responses...
March 20, 2018: Connective Tissue Research
Jae-Young Park, Tae-Joon Cho, Myung Chul Lee, Hyuk-Soo Han
A case of anterior cruciate ligament (ACL) reconstruction with meniscal repair in an osteogenesis imperfecta patient is reported. A 24-year-old female with osteogenesis imperfecta type 1a suffered from a valgus extension injury resulting in tear of ACL and medial meniscus. She underwent an arthroscopic-assisted ACL reconstruction and medial meniscus repair. Meniscal tear at the menisco-capsular junction of the posterior horn of medial meniscus was repaired with three absorbable sutures via inside-out technique...
March 20, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Hwi Don Lee, Jun Geun Shin, Hoon Hyun, Bong-Ahn Yu, Tae Joong Eom
Tendons are tough, flexible, and ubiquitous tissues that connect muscle to bone. Tendon injuries are a common musculoskeletal injury, which affect 7% of all patients and are involved in up to 50% of sports-related injuries in the United States. Various imaging modalities are used to evaluate tendons, and both magnetic resonance imaging and sonography are used clinically to evaluate tendons with non-invasive and non-ionizing radiation. However, these modalities cannot provide 3-dimensional (3D) structural images and are limited by angle dependency...
March 19, 2018: Scientific Reports
Brent James Raiteri, Andrew Graham Cresswell, Glen Anthony Lichtwark
The factors that drive variable aponeurosis behaviors in active versus passive muscle may alter the longitudinal stiffness of the aponeurosis during contraction, which may change the fascicle strains for a given muscle force. However, it remains unknown whether these factors can drive variable aponeurosis behaviors across different muscle-tendon unit (MTU) lengths and influence the subsequent fascicle strains during contraction. Here, we used ultrasound and elastography techniques to examine in vivo muscle fascicle behavior and central aponeurosis deformations of human tibialis anterior (TA) during force-matched voluntary isometric dorsiflexion contractions at three MTU lengths...
March 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
Alejandro Lizaur-Utrilla, Daniel Martinez-Mendez, Santiago Gonzalez-Parreño, Luis Marco-Gomez, Francisco A Miralles Muñoz, Fernando A Lopez-Prats
BACKGROUND: Few studies have analyzed the outcomes of total knee arthroplasty (TKA) in patients with prior anterior cruciate ligament (ACL) reconstruction, and the reported outcomes are controversial. The purpose of this study is to assess if prior ACL reconstruction had any impact on the outcome of subsequent TKA. METHODS: A matched case-control study was conducted in patients who underwent TKA, including 37 with prior ACL reconstruction and 37 patients without ACL reconstruction...
February 21, 2018: Journal of Arthroplasty
Gernot Hochleitner, Fei Chen, Carina Blum, Paul D Dalton, Brian Amsden, Jürgen Groll
Ligaments and tendons are comprised of aligned, crimped collagen fibrils that provide tissue-specific mechanical properties with non-linear extension behaviour, exhibiting low stress at initial strain (toe region behaviour). To approximate this behaviour, we report fibrous scaffolds with sinusoidal patterns by melt electrowriting (MEW) below the critical translation speed (CTS) by exploitation of the natural flow behaviour of the polymer melt. More specifically, we synthesised photopolymerizable poly(L-lactide-co-ε-caprolactone-co-acryloyl carbonate) (p(LLA-co-ε-CL-co-AC)) and poly(ε-caprolactone-co-acryloyl carbonate) (p(ε-CL-co-AC)) by ring-opening polymerization (ROP)...
March 16, 2018: Acta Biomaterialia
M Iglesias, M Ramírez-Berumen, P Butrón, J Alberú-Gómez, F Salazar-Hernández, J Macias-Gallardo, R P Leal-Villalpando, J Zamudio-Bautista, V Acosta, L Jauregui, A Hernández-Campos, V Espinosa-Cruz, J Vázquez-Lamadrid, J González-Sánchez, J Cuellar-Rodriguez, J G Sierra-Madero, R Gaytan-Cervantes, S Contreras-Barbosa, A Navarro-Lara, J Guzman-Gonzalez, J Domínguez-Cherit, M Vilatoba, S Toussaint-Caire, F Vega-Boada, F J Gómez-Pérez, M Mayorquin-Ruiz
BACKGROUND: The function reported after arm transplantation is deemed beneficial relative to the marked disability that upper arm amputation causes. OBJECTIVE: We report a 51-year-old man with a Disabilities of the Arm, Shoulder and Hand (DASH) score of 75.83 who underwent bilateral arm transplantation in October 2015. PROCEDURE: The right arm was transplanted at the glenohumeral joint level, including transplantation of the humeral head, joint capsule, and rotator cuff ligaments and tendons...
March 16, 2018: Transplantation Proceedings
Lorenzo Merlini, Matthew Yalizis, Yannick Carrillon, Hugo Bothorel, Mo Saffarini, Arnaud Godenèche
BACKGROUND: A rare form of rotator cuff tear (RCT) is observed secondary to glenohumeral dislocation, followed by immediate repositioning, as well as formation of scar tissue between tendons and tuberosities. Radiographic diagnosis of such "degloving" tears is problematic because they are obscured by scar tissue. We aimed to describe characteristics of degloving tears and report outcomes following their arthroscopic repair. METHODS: Among 67 patients who underwent arthroscopic repair of RCTs secondary to shoulder dislocation, we identified 8 patients (12%) (7 anterior dislocations and 1 posterior dislocation), aged 54...
March 16, 2018: Journal of Shoulder and Elbow Surgery
R L Meeson, L Corah, M C Conroy, I Calvo
BACKGROUND: Previous studies have suggested that there is a theoretical discrepancy between the cage size and the resultant tibial tuberosity advancement, with the cage size consistently providing less tibial tuberosity advancement than predicted. The purpose of this study was to test and quantify this in clinical cases. The hypothesis was that the advancement of the tibial tuberosity as measured by the widening of the proximal tibia at the tibial tuberosity level after a standard TTA, will be less than the cage sized used, with no particular cage size providing a relative smaller or higher under-advancement, and that the conformation of the proximal tibia will have an influence on the amount of advancement achieved...
March 20, 2018: BMC Veterinary Research
Lisa Reissner, Nadja Zechmann-Mueller, Holger Jan Klein, Maurizio Calcagni, Thomas Giesen
We report sonographic findings with clinical outcomes after zone 2 flexor digitorum profundus tendon repairs in ten fingers. The tendons underwent a six-strand M-Tang core repair, no circumferential suture, and partial or complete division of the pulleys. Over 12 months after surgery and using ultrasound, we found no gapping at the repair site during finger motion. When the pulleys were divided, there was sonographic evidence of tendon bowstringing, but the bowstringing was minimal. Clinically, we did not find any fingers that displayed tendon bowstringing or had functional loss...
January 1, 2018: Journal of Hand Surgery, European Volume
Alison N Agres, Tobias J Gehlen, Adamantios Arampatzis, William R Taylor, Georg N Duda, Sebastian Manegold
BACKGROUND: Although early functional rehabilitation (EFR) has been suggested to yield rapid functional recovery after Achilles tendon rupture (ATR) compared to conventional rehabilitation (CR), most quantitative assessments occur long after rehabilitation has been completed. Few data exist regarding the short-term functional gains during the healing period post-ATR. It remains unclear if EFR allows for an objectively faster return to function. The aim of this study was to examine EFR's effect on gait, plantarflexor strength, and tendon properties in early post-operative follow-ups...
March 5, 2018: Gait & Posture
Jill G Putnam, Anikar Chhabra, Paulo Castañeda, J Brock Walker, Collin C Barber, James A Lendrum, David E Hartigan
BACKGROUND: Greater trochanter decortication is frequently performed at the time of abductor tendon repair to theoretically increase healing potential. No previous studies have determined the effect that greater trochanter decortication has on the pullout strength of suture anchors. Hypothesis/Purpose: The purpose of this study is to determine whether greater trochanter decortication and bone mineral density affect suture anchor pullout strength in abductor tendon repair. The authors hypothesize that both will have a significant detrimental effect on suture anchor pullout strength...
March 1, 2018: American Journal of Sports Medicine
Stefan Plesser, Mohammad Keilani, Gyoergy Vekszler, Timothy Hasenoehrl, Stefano Palma, Martin Reschl, Richard Crevenna, Stefan Hajdu, Harald Kurt Widhalm
Biomechanical studies have shown the use of suture anchors (SA) to be superior to the traditional transosseous sutures (TS) in the repair of quadriceps tendon rupture (QTR). This study aimed to analyze and compare the functional outcomes of patients treated for quadriceps tendon ruptures using suture anchors or transosseous sutures. Patients having undergone suture anchor repair or transosseous suture repair for quadriceps tendon rupture between 2010 and 2015 at one of the two participating hospitals were included...
2018: PloS One
Sarel R van Amstel, David E Anderson, Ricardo Videla
CASE DESCRIPTION 3 Angus bulls, aged 2 to 3 years, with severe lameness of 2 to 4 weeks' duration and swelling proximal to the coronary band of the affected limb were evaluated after failing to respond to antimicrobial treatment. CLINICAL FINDINGS Septic arthritis of a distal interphalangeal joint (DIPJ) was diagnosed in all 3 bulls on the basis of results of a physical examination, radiographic and ultrasonographic evaluations of the affected foot, and cytologic evaluation of synovial fluid from the affected DIPJ...
April 1, 2018: Journal of the American Veterinary Medical Association
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