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https://www.readbyqxmd.com/read/29774956/cement-interface-and-bone-stress-in-total-hip-arthroplasty-relationship-to-head-size
#1
Teresa Alonso-Rasgado, Jose F Del-Valle-Mojica, David Jimenez-Cruz, Colin G Bailey, Tim N Board
The use of larger prosthetic femoral heads in total hip arthroplasty (THA) has increased considerably in recent years in response to the need to improve joint stability and reduce risk of dislocation. However, data suggests larger femoral heads are associated with higher joint failure rates. For cemented implants, ensuring the continued integrity of the cement mantle is key to long term fixation. This paper describes an investigation into the effect of variation in femoral head size on stresses in the acetabular cement mantle and pelvic bone...
May 18, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29771222/structure-of-health-care-dyad-leadership-an-organization-s-experience
#2
Anurag Saxena, Maura Davies, Don Philippon
Purpose This study aims to explore the structural aspects (roles, responsibilities and reporting) of dyad leadership in one health-care organization (HCO). Design/methodology/approach The perceptions of 32 leaders (17 physician leaders and 15 dyad co-leaders) in formal leadership positions (six first-level with formal authority limited to teams or divisions, 23 middle-level with wider departmental or program responsibility and three senior-level with institution-wide authority) were obtained through focus groups and surveys...
May 8, 2018: Leadership in Health Services
https://www.readbyqxmd.com/read/29769831/improvement-of-functional-ankle-properties-following-supplementation-with-specific-collagen-peptides-in-athletes-with-chronic-ankle-instability
#3
Patrick Dressler, Dominic Gehring, Denise Zdzieblik, Steffen Oesser, Albert Gollhofer, Daniel König
Following an initial ankle sprain it is not unlikely that chronic ankle instability (CAI) will develop. CAI is associated with impaired perceived functional and mechanical properties of the ligaments. Nutritional supplementation with collagen peptides has been shown to improve the functional and mechanical properties of the connective tissue. The purpose of this study was to investigate the effectiveness of specific collagen peptide supplementation (SCP) to improve ankle stability in athletes with CAI. 50 male and female athletes with CAI completed a randomized, double-blinded and placebo-controlled study with a daily oral administration of either 5 g SCP or 5 g placebo (Maltodextrin) over a period of six months...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29769141/single-coracoclavicular-suture-fixation-with-mersilene-tape-versus-hook-plate-in-the-treatment-of-acute-type-v-acromioclavicular-dislocation-a-retrospective-analysis
#4
Ying-Cheng Huang, Shan-Wei Yang, Chun-Yu Chen, Kai-Cheng Lin, Jenn-Huei Renn
BACKGROUND: Here, we compared the clinical and radiographic outcomes between coracoclavicular (CC) fixation with Mersilene tape and hook plate for acute unstable acromioclavicular (AC) joint dislocation treatment. METHODS: We enrolled 49 patients with unstable acute AC dislocation who, between January 2010 and January 2014, underwent surgery with single CC suture fixation with Mersilene tape (M group, 25 cases) or clavicle hook plate (H group, 24 cases). In M and H groups, the average age was 43...
May 16, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29768337/variation-in-origin-of-the-long-head-of-the-biceps-brachii-tendon-in-a-cadaver-a-case-report
#5
Shuji Katsuki, Hayato Terayama, Ryuta Tanaka, Ning Qu, Osamu Tanaka, Kanae Umemoto, Kaori Suyama, Kou Sakabe
INTRODUCTION: In general, the long head of the biceps brachii (LHB) tendon arises from the supraglenoid tubercle in the shoulder joint, and it has an important stabilizing mechanism for the humeral head in the shoulder joint. This case demonstrates that even if the LHB tendon can be palpated outside of the shoulder joint, it may disappear in the intertubercular sulcus (IS) and in the glenohumeral (GH) joint because of abnormal articulation. PATIENT CONCERNS: This case involved the cadaver of an 82-year-old Japanese man (number 1936, cause of death: hepatocellular tumor), who was selected from the bodies used for gross anatomy practice at the Tokai University School of Medicine in 2017...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29767809/pediatric-anterior-cruciate-ligament-reconstruction
#6
Alexia G Gagliardi, Jay C Albright
The rate of anterior cruciate ligament (ACL) ruptures diagnosed among the pediatric and adolescent population is increasing. The rise in ACL injuries may be attributed to earlier sports specialization, year-round sports participation, increased awareness, and improved ability to diagnose the injury. Treatment options for pediatric or adolescent ACL injuries include nonoperative conservative treatment, ACL repair, or various techniques for ACL reconstruction. The best course of treatment for ACL rupture in young patients continues to be debated...
May 1, 2018: Orthopedics
https://www.readbyqxmd.com/read/29760476/self-organizing-layers-from-complex-molecular-anions
#7
Jonas Warneke, Martin E McBriarty, Shawn L Riechers, Swarup China, Mark H Engelhard, Edoardo Aprà, Robert P Young, Nancy M Washton, Carsten Jenne, Grant E Johnson, Julia Laskin
The formation of traditional ionic materials occurs principally via joint accumulation of both anions and cations. Herein, we describe a previously unreported phenomenon by which macroscopic liquid-like thin layers with tunable self-organization properties form through accumulation of stable complex ions of one polarity on surfaces. Using a series of highly stable molecular anions we demonstrate a strong influence of the internal charge distribution of the molecular ions, which is usually shielded by counterions, on the properties of the layers...
May 14, 2018: Nature Communications
https://www.readbyqxmd.com/read/29759927/incidence-of-nonunion-of-the-hallux-interphalangeal-joint-arthrodesis-a-systematic-review
#8
REVIEW
Eric So, Matthew D Wilson, Anson K Chu, Mark A Prissel
Hallux interphalangeal joint arthrodesis is an effective procedure to treat pain and provide stability and is often performed for intrinsic pain to the hallux interphalangeal joint. Additionally, this procedure is typically used in concert with the Jones tenosuspension. Although this as an accepted technique, the available data are scant, and questions remain regarding nonunion rates and contributory factors to poor healing. A systematic review of the reported data were undertaken to determine the rate of nonunion for hallux interphalangeal joint arthrodesis...
May 11, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29759215/study-of-chromium-species-release-from-metal-implants-in-blood-and-joint-effusion-utilization-of-hplc-icp-ms
#9
Radka Pechancová, Tomáš Pluháček, Jiří Gallo, David Milde
The objective of this study was to develop and validate a novel analytical procedure for determination of total chromium and Cr(III) and Cr(VI) species released from metal implants into whole blood and joint effusion. Firstly, the ion-pair chromatographic method employing reversed-phase high-performance liquid chromatography inductively coupled plasma mass spectrometry (ICP-MS) for analysis of species was developed. Secondly, all samples, protein and low molecular fractions were analyzed for their total chromium content using ICP-MS...
August 1, 2018: Talanta
https://www.readbyqxmd.com/read/29758508/the-efficacy-of-elastic-therapeutic-tape-variations-on-measures-of-ankle-function-and-performance
#10
Christopher Michael Brogden, Kelly Marrin, Richard Michael Page, Matt Greig
OBJECTIVES: To investigate the effects of different variations of elastic therapeutic taping (ETT) on tests used to screen for ankle injury risk and function. DESIGN: Randomized crossover. SETTING: Laboratory. PARTICIPANTS: Twelve professional male soccer players completed three experimental trials: No tape (NT), RockTape™ (RT), and Kinesio™ Tape (KT) applied to the ankle complex. OUTCOME MEASURES: Clinical and functional ankle screening tests were used to assess the effects of ETT on measures of joint position sense, postural stability and ground reaction forces...
April 23, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29757261/design-of-an-inertial-sensor-based-data-glove-for-hand-function-evaluation
#11
Bor-Shing Lin, I-Jung Lee, Shu-Yu Yang, Yi-Chiang Lo, Junghsi Lee, Jean-Lon Chen
Capturing hand motions for hand function evaluations is essential in the medical field. Various data gloves have been developed for rehabilitation and manual dexterity assessments. This study proposed a modular data glove with 9-axis inertial measurement units (IMUs) to obtain static and dynamic parameters during hand function evaluation. A sensor fusion algorithm is used to calculate the range of motion of joints. The data glove is designed to have low cost, easy wearability, and high reliability. Owing to the modular design, the IMU board is independent and extensible and can be used with various microcontrollers to realize more medical applications...
May 13, 2018: Sensors
https://www.readbyqxmd.com/read/29753125/adaptation-of-kinematic-synergy-and-postural-control-to-mechanical-ankle-constraint-on-an-unsteady-stance-surface
#12
Yi-Ying Tsai, Gwo-Ching Chang, Ing-Shiou Hwang
Joint constraint interferes with the coordinative structure in joint movements used to optimize postural stability. This study aimed to investigate changes in postural synergy when the ankle joints were bilaterally braced during a stabilometer stance. Twenty-four young adults stood on a stabilometer plate while wearing a pair of ankle-foot orthoses, which were either unlocked or locked to restrict ankle motion (the ankle constraint (AC) and non-constraint (NC) conditions). Although ankle constraint did not significantly affect the dynamics of the stabilometer movements, the size and regularity of the first principal component (PC1), which explained more than 80% of the variance of joint movements in the lower limb, were increased...
May 9, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29752509/current-concepts-and-future-perspectives-in-computer-assisted-navigated-total-knee-replacement
#13
REVIEW
Tomoyuki Matsumoto, Naoki Nakano, John E Lawrence, Vikas Khanduja
BACKGROUND: Total knee replacements (TKR) aim to restore stability of the tibiofemoral and patella-femoral joints and provide relief of pain and improved quality of life for the patient. In recent years, computer-assisted navigation systems have been developed with the aim of reducing human error in joint alignment and improving patient outcomes. METHODS: We examined the current body of evidence surrounding the use of navigation systems and discussed their current and future role in TKR...
May 12, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29752507/changes-of-mechanoreceptors-in-different-state-remnants-of-ruptured-anterior-cruciate-ligament
#14
Bin Li, Yu-Tong Wang, Lun-Hao Bai, Yu Wen
OBJECTIVE: To observe the changes in the quantity and morphology of mechanoreceptors in different-state remnant stumps of ruptured anterior cruciate ligaments (ACLs). METHODS: Specimens of completely ruptured ACL remnants were collected from 57 patients. The injury time from injury to surgery was recorded. According to the degree of pre-operative anterior displacement of knee joint, these patients were divided into two groups: group 1 (≤ 6 mm) and group 2 (> 6 mm)...
May 12, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29752220/biomechanical-characteristics-of-biplane-multiplanar-tension-side-fixation-for-lapidus-fusion
#15
Paul Dayton, Daniel J Hatch, Robert D Santrock, Bret Smith
Although plating on the plantar, tension-side of the metatarsocuneiform joint provides an inherent biomechanical advantage for Lapidus arthrodesis, it has not been widely adopted owing to the morbidity associated with plantar application. To overcome these limitations, a modification to 90-90 locked biplanar plating was developed to provide the biomechanical advantages of multiplanar fixation and tension-side fixation, allowing application through a conventional incision. We tested the hypothesis that biplanar plating with tension-side fixation (low-profile straight dorsal plate and anatomic medial-plantar plate) would demonstrate improved mechanical stability compared with a previously tested 90-90 biplanar construct (small straight plate dorsally and medially) under cyclic loading...
May 8, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29751160/interactions-of-oxidized-multiwalled-carbon-nanotube-with-cadmium-on-zebrafish-cell-line-the-influence-of-two-co-exposure-protocols-on-in-vitro-toxicity-tests
#16
Mariana Morozesk, Lidiane S Franqui, Adrislaine S Mansano, Diego Stéfani T Martinez, Marisa N Fernandes
The widespread production and application of carbon nanotubes (CNT) have raising concerns about their release into the environment and, the joint toxicity of CNT with pre-existing contaminants needs to be assessed. This is the first study that investigated the co-exposure of oxidized multiwalled carbon nanotubes (ox-MWCNT) and cadmium (Cd) using a zebrafish liver cell line (ZFL). Two in vitro co-exposure protocols differing by the order of ox-MWCNT interaction with Cd and fetal bovine serum (FBS) proteins were evaluated...
May 5, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29748505/textile-based-interdigital-capacitive-soft-strain-sensor-for-wearable-applications
#17
Ozgur Atalay
The electronic textile area has gained considerable attention due to its implementation of wearable devices, and soft sensors are the main components of these systems. In this paper, a new sensor design is presented to create stretchable, capacitance-based strain sensors for human motion tracking. This involves the use of stretchable, conductive-knit fabric within the silicone elastomer matrix, as interdigitated electrodes. While conductive fabric creates a secure conductive network for electrodes, a silicone-based matrix provides encapsulation and dimensional-stability to the structure...
May 10, 2018: Materials
https://www.readbyqxmd.com/read/29746150/biomechanical-comparison-of-anatomic-and-extra-anatomic-reconstruction-techniques-using-local-grafts-for-chronic-instability-of-the-acromioclavicular-joint
#18
Malo Le Hanneur, Andrew Thoreson, Damien Delgrande, Thibault Lafosse, Jean-David Werthel, Philippe Hardy, Bassem Elhassan
BACKGROUND: Anatomic reconstruction techniques are increasingly used to address cases of acromioclavicular (AC) joint chronic instability. These usually involve an additional surgical site for autograft harvesting or an allograft. PURPOSE: To describe a triple-bundle (TB) anatomic reconstruction using on-site autografts, the semiconjoint tendon (SCT) and the coracoacromial ligament (CAL), and compare its primary stability to the native AC joint ligamentous complex and to a modified Weaver-Dunn (WD) reconstruction...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29740965/comparative-evaluation-of-chitosan-nerve-guides-with-regular-or-increased-bendability-for-acute-and-delayed-peripheral-nerve-repair-a-comprehensive-comparison-with-autologous-nerve-grafts-and-muscle-in-vein-grafts
#19
Maria Stößel, Vivien M Wildhagen, Olaf Helmecke, Jennifer Metzen, Charlotte B Pfund, Thomas Freier, Kirsten Haastert-Talini
Reconstruction of joint-crossing digital nerves requires the application of nerve guides with a much higher flexibility than used for peripheral nerve repair along larger bones. Nevertheless, collapse-resistance should be preserved to avoid secondary damage to the regrowing nerve tissue. In recent years, we presented chitosan nerve guides (CNGs) to be highly supportive for the regeneration of critical gap length peripheral nerve defects in the rat. Now, we evidently increased the bendability of regular CNGs (regCNGs) by developing a wavy wall structure, i...
May 8, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29740555/a-comparative-study-on-the-recruitment-of-shoulder-stabilizing-muscles-and-types-of-exercises
#20
João Carlos Comel, Rosane Maria Nery, Eduardo Lima Garcia, Claudete da Silva Bueno, Edinara de Oliveira Silveira, Mariéle Marchezan Zarantonello, Marco Antonio Stefani
The shoulder is susceptible to disturbances caused by microtraumas due to direct contact of the surrounding skeletal structures or failure of the soft parts of the rotator cuff and other muscles inserted into the glenohumeral joint. The purpose of the study was to compare the electromyographic signal in the stabilizing muscles of the shoulder during the diagonal elevation exercise as recommended by the proprioceptive neuromuscular facilitation (PNF) method and dumbbell exercise. This study is classified as Quase-experiment...
April 2018: Journal of Exercise Rehabilitation
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