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https://www.readbyqxmd.com/read/28339288/the-proximal-tibiofibular-joint-a-biomechanical-analysis-of-the-anterior-and-posterior-ligamentous-complexes
#1
Daniel Cole Marchetti, Gilbert Moatshe, Brian M Phelps, Kimi D Dahl, Marcio Balbinotti Ferrari, Jorge Chahla, Travis Lee Turnbull, Robert F LaPrade
BACKGROUND: Dislocation of the proximal tibiofibular joint is a complex injury that is often overlooked or misdiagnosed. Surgical management is recommended for severe acute or for chronic symptomatic instability of the proximal tibiofibular joint. Although the anterior ligamentous complex has been reported to be stronger than the posterior complex, biomechanical data are lacking. PURPOSE: To determine the ultimate load of the anterior and posterior ligamentous complexes of the proximal tibiofibular joint to determine optimal graft selection...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28337920/non-radiative-step-facets-in-semiconductor-nanowires
#2
Ana M Sanchez, Yunyan Zhang, Edward W Tait, Nicholas D M Hine, Huiyun Liu, Richard Beanland
One of the main advantages of nanowires for functional applications is their high perfection, which results from surface image forces that act on line defects such as dislocations, rendering them unstable and driving them out of the crystal. Here we show that there is a class of linear defects that are stable in nanowires, with no long-range strain field or dislocation character. In zinc-blende semiconductors, they take the form of Ʃ3 (112) facets with heights constrained to be a multiple of three {111} monolayers...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28336664/grain-boundary-stability-governs-hardening-and-softening-in-extremely-fine-nanograined-metals
#3
J Hu, Y N Shi, X Sauvage, G Sha, K Lu
Conventional metals become harder with decreasing grain sizes, following the classical Hall-Petch relationship. However, this relationship fails and softening occurs at some grain sizes in the nanometer regime for some alloys. In this study, we discovered that plastic deformation mechanism of extremely fine nanograined metals and their hardness are adjustable through tailoring grain boundary (GB) stability. The electrodeposited nanograined nickel-molybdenum (Ni-Mo) samples become softened for grain sizes below 10 nanometers because of GB-mediated processes...
March 24, 2017: Science
https://www.readbyqxmd.com/read/28336249/current-epidemiology-of-revision-total-hip-arthroplasty-in-the-united-states-national-inpatient-sample-2009-to-2013
#4
Chukwuweike U Gwam, Jaydev B Mistry, Nequesha S Mohamed, Melbin Thomas, Kevin C Bigart, Michael A Mont, Ronald E Delanois
BACKGROUND: Despite the excellent outcomes associated with primary total hip arthroplasty (THA), implant failure and revision continues to burden the healthcare system. THA failure has evolved and displays variability throughout the literature. In order to understand how THAs are failing and how to reduce this burden, it is essential to assess modes of implant failure on a large scale. Thus, we report: (1) etiologies for revision THA; (2) frequencies of revision THA procedures; (3) patient demographics, payor type, and US Census region of revision THA patients; and (4) the length of stay and total costs based on the type of revision THA procedure...
February 27, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28336230/the-effect-of-concomitant-biceps-tenodesis-on-reoperation-rates-after-rotator-cuff-repair-a%C3%A2-review-of-a-large-private-payer-database-from-2007-to-2014
#5
Brandon J Erickson, Bryce A Basques, Justin W Griffin, Samuel A Taylor, Stephen J O'Brien, Nikhil N Verma, Anthony A Romeo
PURPOSE: To determine if reoperation rates are higher for patients who underwent isolated rotator cuff repair (RCR) than those who underwent RCR with concomitant biceps tenodesis using a large private-payer database. METHODS: A national insurance database was queried for patients who underwent arthroscopic RCR between the years 2007 and 2014 (PearlDiver, Warsaw, IN). The Current Procedural Terminology (CPT) 29,827 (arthroscopy, shoulder, surgical; with RCR) identified RCR patients who were subdivided into 3 groups-group 1: RCR without biceps tenodesis; group 2: RCR with concomitant arthroscopic biceps tenodesis (CPT 29827 and 29,828); group 3: RCR with concomitant open biceps tenodesis (CPT 29827 and 23,430)...
March 20, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28335748/steroid-resistant-nephrotic-syndrome-as-the-initial-presentation-of-nail-patella-syndrome-a-case-of-a-de-novo-lmx1b-mutation
#6
Tomohiro Nakata, Ryo Ishida, Yuu Mihara, Atsuko Fujii, Yoshimoto Inoue, Tetsuro Kusaba, Tsuyoshi Isojima, Yutaka Harita, Chiaki Kanda, Sachiko Kitanaka, Keiichi Tamagaki
BACKGROUND: Nail-patella syndrome (NPS) is an autosomal dominant disorder caused by mutations in the LMX1B gene and is characterized by nail dysplasia, skeletal abnormalities, and nephropathy. We herein report a case of steroid-resistant nephrotic syndrome (SRNS) prior to overt orthopedic symptoms in a patient with NPS. CASE PRESENTATION: A 24-year-old woman presented to our hospital with knee pain. She had poorly developed nails, hypoplastic patellas, dislocation of the elbows, and iliac horns in the pelvis...
March 23, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28335482/improved-wallis-dodging-algorithm-for-large-scale-super-resolution-reconstruction-remote-sensing-images
#7
Chong Fan, Xushuai Chen, Lei Zhong, Min Zhou, Yun Shi, Yulin Duan
A sub-block algorithm is usually applied in the super-resolution (SR) reconstruction of images because of limitations in computer memory. However, the sub-block SR images can hardly achieve a seamless image mosaicking because of the uneven distribution of brightness and contrast among these sub-blocks. An effectively improved weighted Wallis dodging algorithm is proposed, aiming at the characteristic that SR reconstructed images are gray images with the same size and overlapping region. This algorithm can achieve consistency of image brightness and contrast...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28334148/surgical-versus-conservative-management-of-type-iii-acromioclavicular-dislocation-a-systematic-review
#8
Umile Giuseppe Longo, Mauro Ciuffreda, Giacomo Rizzello, Nicholas Mannering, Nicola Maffulli, Vincenzo Denaro
Introduction: The management of Type III acromioclavicular (AC) dislocations is still controversial. We wished to compare the rate of recurrence and outcome scores of operative versus non-operative treatment of patients with Type III AC dislocations. Source of data: A systematic review of the literature was performed by applying the PRISMA guidelines according to the PRISMA checklist and algorithm. A search in Medline, PubMed, Cochrane and CINAHL was performed using combinations of the following keywords: 'dislocation', 'Rockwood', 'type three', 'treatment', 'acromioclavicular' and 'joint'...
February 27, 2017: British Medical Bulletin
https://www.readbyqxmd.com/read/28332404/conceptual-design-and-implantation-of-an-external-fixator-with-improved-mobility-for-knee-rehabilitation
#9
Gianluca Gatti
A hinged external fixator is used to allow early knee rehabilitation in case of injury or trauma, as an alternative approach to immobilization. It is mainly adopted for the treatment of dislocations, which involve tearing of the ligaments, and it basically consists of two links connected to each other by a revolute joint. Each link is fixed to the femur and tibia via pin fixation, and the revolute joint is approximately aligned to the knee flexion-extension (FE) axis. The advantage in its implantation is to protect ligament reconstruction, while allowing for an aggressive rehabilitation...
March 23, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28331239/evaluation-of-a-marker-clip-system-in-sonographically-guided-core-needle-biopsy-for-breast-cancer-localization-before-and-after-neoadjuvant-chemotherapy
#10
R Schulz-Wendtland, P Dankerl, M R Bani, P A Fasching, K Heusinger, M P Lux, S M Jud, C Rauh, C M Bayer, M G Schrauder, M W Beckmann, M Uder, B Brehm, C R Loehberg
Introduction The placement of intramammary marker clips has proven to be helpful for tumor localization in patients undergoing neoadjuvant chemotherapy and breast-conserving surgery. The purpose of our study was to investigate the feasibility of using a clip marker system for breast cancer localization and its influence on the imaging assessment of treatment responses after neoadjuvant chemotherapy. Patients and Methods Between March and June 2015, a total of 25 patients (n = 25), with a suspicion of invasive breast cancer with diameters of at least 2 cm (cT2), underwent preoperative sonographically guided core needle biopsy using a single-use breast biopsy system (HistoCore™) and intramammary clip marking using a directly adapted clip system based on the established O-Twist Marker™, before their scheduled preoperative neoadjuvant chemotherapy...
February 2017: Geburtshilfe und Frauenheilkunde
https://www.readbyqxmd.com/read/28330757/does-new-instrumentation-improve-radiologic-alignment-of-the-oxford%C3%A2-medial-unicompartmental-knee-arthroplasty
#11
Ki-Mo Jang, Hong Chul Lim, Seung-Beom Han, Chandong Jeong, Seul-Gi Kim, Ji-Hoon Bae
BACKGROUND: A new instrument system has been introduced to improve the accuracy and reproducibility of implant positioning in Oxford® unicompartmental knee arthroplasty (UKA). This study aimed to determine if the new instrumentation could improve postoperative implant positioning and limb alignment, and reduce the occurrence of outliers in Oxford® UKA. METHODS: A total of 77 cases of Oxford® UKA with the new instrumentation were included. Individual matching for the conventional instrument group was performed according to age, sex, and body mass index...
March 19, 2017: Knee
https://www.readbyqxmd.com/read/28328562/treatment-of-unstable-versus-stable-slipped-capital-femoral-epiphysis-using-the-modified-dunn-procedure
#12
Richard L Davis, Walter P Samora, Freddie Persinger, Kevin E Klingele
BACKGROUND: The modified Dunn procedure (open subcapital realignment via a surgical dislocation approach) has been shown to be a safe and effective way of treating acute, unstable slipped capital femoral epiphysis (SCFE). There is a paucity of literature comparing the modified Dunn procedure in stable SCFE. The purpose of this study was to compare acute, unstable versus chronic, stable SCFE managed with the modified Dunn procedure. METHODS: A retrospective chart review was performed on 44 skeletally immature patients who underwent the modified Dunn procedure for SCFE...
March 21, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28328560/surgical-treatment-of-congenital-and-obligatory-dislocation-of-the-patella-in-children
#13
Ronen Sever, Michael Fishkin, Yoram Hemo, Shlomo Wientroub, Moshe Yaniv
BACKGROUND: Congenital (fixed) dislocations and obligatory (habitual) patellar dislocations represent a complex clinical and surgical challenge. Numerous treatment options, offering different perspectives, and surgical solutions are reported in the literature.We implemented the surgical technique principles, originally described by Stanisavljevic, for congenital (fixed) and obligatory (habitual) patellar dislocations, with slight modifications. METHODS: We retrospectively evaluated the results of group of 12 patients (15 knees), operated between the years 2002 and 2013...
March 21, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28328135/confirmation-of-cagsss-syndrome-as-a-distinct-entity-in-a-danish-patient-with-a-novel-homozygous-mutation-in-iars2
#14
Shahida Moosa, Annette Haagerup, Pernille Axel Gregersen, Karin Kastberg Petersen, Janine Altmüller, Holger Thiele, Peter Nürnberg, Tae-Joon Cho, Ok-Hwa Kim, Gen Nishimura, Bernd Wollnik, Ida Vogel
Since the original description of the IARS2-related cataracts, growth hormone deficiency, sensory neuropathy, sensorineural hearing loss, skeletal dysplasia syndrome (CAGSSS; OMIM 616007) in an extended consanguineous family of French-Canadian descent, no further patients have been reported. IARS2 (OMIM 612801) encodes the mitochondrial isoleucine-tRNA synthetase which belongs to the class-I aminoacyl-tRNA synthetase family, and has been implicated in CAGSSS and a form of Leigh syndrome. Here, we report on a female Danish patient with a novel homozygous IARS2 mutation, p...
April 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28327142/exome-sequencing-identified-rare-variants-in-genes-hspg2-and-atp2b4-in-a-family-segregating-developmental-dysplasia-of-the-hip
#15
Sulman Basit, Alia M Albalawi, Essa Alharby, Khalid I Khoshhal
BACKGROUND: Developmental dysplasia of the hip (DDH) is a common pathological condition of the musculoskeletal system in infants which results in a congenital and developmental malformation of the hip joint. DDH is a spectrum of pathologies affecting the infant hip ranging from asymptomatic subtle radiographic signs through mild instability to frank dislocations with acetabular dysplasia. A Saudi family with three affected individuals with DDH was identified and genetic analysis was performed to detect the possible genetic defect(s) underlying DDH in the affected members of the family...
March 21, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28326527/atrial-septal-defect-occluder-dislocation-engaged-through-the-tricuspid-valve-surgical-removal-via-right-thoracotomy
#16
Marzia Cottini, Amedeo Pergolini, Francesco Musumeci
No abstract text is available yet for this article.
2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28326443/radiological-clinical-and-functional-evaluation-using-the-quick-disabilities-of-the-arm-shoulder-and-hand-questionnaire-of-children-with-medial-epicondyle-fractures-treated-surgically
#17
Federico Canavese, Lorenza Marengo, Alexandru Tiris, Mounira Mansour, Marie Rousset, Antoine Samba, Antonio Andreacchio, Alain Dimeglio
PURPOSE: The main goal of this study was to retrospectively evaluate the clinical, functional and radiographic outcomes of displaced medial epicondyle fractures with or without associated elbow dislocation in children undergoing surgical treatment and to evaluate upper-extremity function with the Quick Disbilities of the Arm, Shoulder and Hand (Quick DASH) questionnaire. The hypothesis was that patients with associated elbow dislocation would have similar functional outcome to patients with displaced fractures with or without intra-articular entrapment of the medial epicondyle...
March 22, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28326429/ceramic-on-ceramic-bearings-total-hip-arthroplasty-in-young-patients
#18
Tao Wang, Jun-Ying Sun, Xi-Jiang Zhao, Yong Liu, Hai-Bo Yin
BACKGROUND: The results of ceramic-on-ceramic (CoC) total hip arthroplasty (THA) in younger patients were not univocal. This study aims to evaluate the results of CoC bearing THA in patients younger than 50 years. METHODS: A total of 90 younger patients performed CoC THAs during March 2003 and May 2008 were included in this study. Hip function and activity were evaluated with Harris hip score and University of California Los Angeles activity score. We had discussed survival rates, radiological findings of component loosening or osteolysis, and ceramic-related complications in these patients...
December 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28326408/traumatic-anterior-knee-dislocation-after-total-knee-arthroplasty
#19
Richard S Ahn, Matthew J Brown, Mario D Santilli
This article describes a traumatic complete anterior knee dislocation of a previously well-functioning total knee arthroplasty. A thorough physical examination with appropriate radiographic imaging study is required for proper evaluation and treatment of this injury, as it is often associated with neurovascular injury and subsequent global instability of the injured knee is likely.
September 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28326397/fracture-of-an-uncemented-tantalum-patellar-component
#20
Nathan L Grimm, Robert A Henderson, Joseph J Kavolus, Patrick D Millikan, Paul F Lachiewicz
A 62-year-old man presented with the acute, atraumatic onset of pain 3 years after uncemented right total knee arthroplasty. He complained of new mechanical locking with the knee held in extension on examination and unable to flex the knee. On the plain radiographs, the patellar component peg was fractured and the plate was dislocated. The knee was immobilized, and revision to a cemented 3-peg component was performed. Fracture of a single-peg, tantalum-backed uncemented patellar component has not been described...
June 2016: Arthroplasty Today
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