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https://www.readbyqxmd.com/read/28205596/3d-printed-self-driven-thumb-sized-motors-for-in-situ-underwater-pollutant-remediation
#1
Fen Yu, Qipeng Hu, Lina Dong, Xiao Cui, Tingtao Chen, Hongbo Xin, Miaoxing Liu, Chaowen Xue, Xiangwei Song, Fanrong Ai, Ting Li, Xiaolei Wang
Green fuel-driven thumb sized motors (TSM) were designed and optimized by 3D printing to explore their in-situ remediation applications in rare studied underwater area. Combined with areogel processing and specialized bacteria domestication, each tiny TSM could realize large area pollutant treatment precisely in an impressive half-automatically manner.
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28205478/scaphotrapeziotrapezoidal-joint-osteoarthritis-a-systematic-review-of-surgical-treatment
#2
Victoria M Deans, Zafar Naqui, Lindsay T S W Muir
BACKGROUND: The management of scaphotrapeziotrapezoidal (STT) joint osteoarthritis (OA) remains controversial. This systematic review aims to review the evidence for surgical interventions specific to STT OA. METHODS: Medline and Embase libraries were searched using a pre-defined search strategy in October 2014. All study designs and languages were included and evaluated by two reviewers (VMD and LM) against the inclusion/exclusion criteria. The study eligibility criteria included papers discussing surgical treatment of STT OA, and the review was conducted using the PRISMA guidelines...
March 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28205252/sensory-deficits-after-a-radial-nerve-injury
#3
Jayme Augusto Bertelli, Erica Cavalli, Vera Lúcia Mendes Lehn, Marcos Flávio Ghizoni
BACKGROUND: The aim of our study was to objectively test sensibility on the dorsal side of the hand in patients with radial nerve injury, to document deficits and to detect if surgery for sensory reconstruction is needed. METHODS: Nineteen patients of mean age 31 ± 10 years were examined at a mean of 26.4 ± 27.8 months post radial nerve injury. Sensory mechanical thresholds on the dorsal surface of the hand were evaluated using Semmes-Weinstein monofilaments...
February 16, 2017: Microsurgery
https://www.readbyqxmd.com/read/28196445/chrome-nitride-coating-reduces-wear-of-small-spherical-crcomo-metal-on-metal-articulations-in-a-joint-simulator
#4
R Thorkildsen, O Reigstad, M Røkkum
Metal-on-metal articulations have fallen out of favour in larger joint replacements, but are still used in smaller joints. Coating the articulation has been suggested as one way of reducing wear. We compared a standard 6 mm CrCoMo articulation designed for the carpometacarpal joint of the thumb with a chromium nitride-coated version after 512,000 cycles in a joint simulator. A total of 6 articulations in each group were tested with a unidirectional load of 5 kg in Ringer's solution. We found a statistically significant reduction in weight loss, amount of metallic wear produced and volumetric wear for the chromium nitride-coated articulation...
March 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28196434/the-anatomy-of-wassel-type-iv-d-thumb-duplication
#5
B He, G Liu, G Nan
: We describe Wassel type IV-D thumb duplication anatomy after surgery on 11 affected children (12 hands, seven boys (eight hands) and four girls). We studied the structure and course of the flexor pollicis longus tendon and its action at the joint. Four patients had secondary deformity associated with an absent A2 pulley and a tendon that clung to the radial side of a small thumb. In patients with primary deformity, the flexor tendon sheath became membranous in the A2 area and attached to neighbouring sites on the opposite side of the proximal phalanx...
February 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28193099/outcomes-of-grafting-intrasynovial-tendons-of-the-toes-to-the-hands-in-10-patients-a-preliminary-report
#6
H Ohi, S Uchiyama, T Kanda, M Mukoda, M Hayashi, H Kato
Ten patients had intrasynovial tendon grafting harvested from the toes for secondary flexor tendon reconstruction in nine fingers and one thumb in our institutes from 2009 to 2014. These patients were followed for a mean of 15 (range: 8-36) months. The ranges of total active motion of the proximal and distal interphalangeal joints of these nine fingers were 143° (range: 108-175°) and of the metacarpophalangeal and interphalangeal joints of one thumb were 110°. In conclusion, this technique is feasible and gives a good result when successful but with a high complication rate...
February 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28192482/characterization-of-the-disruption-of-neural-control-strategies-for-dynamic-fingertip-forces-from-attractor-reconstruction
#7
Lorenzo Peppoloni, Emily L Lawrence, Emanuele Ruffaldi, Francisco J Valero-Cuevas
The Strength-Dexterity (SD) test measures the ability of the pulps of the thumb and index finger to compress a compliant and slender spring prone to buckling at low forces (<3N). We know that factors such as aging and neurodegenerative conditions bring deteriorating physiological changes (e.g., at the level of motor cortex, cerebellum, and basal ganglia), which lead to an overall loss of dexterous ability. However, little is known about how these changes reflect upon the dynamics of the underlying biological system...
2017: PloS One
https://www.readbyqxmd.com/read/28178151/reconstruction-of-large-area-defect-of-the-nail-bed-by-cross-finger-fascial-flap-combined-with-split-thickness-toe-nail-bed-graft-a-new-surgical-method
#8
Jianyun Yang, Tao Wang, Cong Yu, Yudong Gu, Xiaotian Jia
Fingertip injury commonly results in avulsion of the nail bed. For large area defects of the nail bed with distal phalanx exposure, methods for reconstruction of soft tissue defects are scarcely mentioned in the literature.From May 2014 to January 2016, 6 patients with large area defects of the nail bed with distal phalanx exposure were enrolled. A new surgical method, cross finger fascial flap combined with thin split-thickness toe nail bed graft, was applied in all patients.All the 6 patients were followed-up at least 3 months...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28169867/germinotropic-onychocytic-matricoma-a-new-histopathologic-subtype-of-onychocytic-matricoma-in-the-light-of-the-microanatomy-of-the-normal-nail-unit-with-special-reference-to-nail-mesenchyme
#9
Christophe Perrin
Onychocytic matricoma (OCM) is a benign tumor of adnexal keratinocytes in which there is complete cytodifferentiation toward the germinative cells of the nail matrix, the keratogenous zone cells, and cells of the nail plate. Several microscopic variants of OCM were initially recognized; acanthotic type, acanthotic and papillomatous type, keratogenous type, and melanocytic as slight proliferation of dendritic melanocytes within the basaloid cells. This study reports an additional histopathologic variant of OCM...
February 2, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28169268/accidental-separation-and-lodgment-of-rotary-endodontic-file-into-the-dentist-s-thumb
#10
Rohit Karnik, Subraj Shetty, Rajiv S Desai, Karthick Shetty
Separation of the endodontic instrument within the root canal system and sharp injuries to the dentist is not an uncommon event in endodontic practice. Although root canal instruments can fracture at any stage of endodontic treatment, its fracture within the dentist's hand is a very rare event. An unusual case of accidental separation and lodgment of rotary endodontic file in the dentist's thumb is presented along with its management. A 33-year-old dentist reported with an accidental lodgment of rotary endodontic file into his thumb...
November 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28168072/synovial-osteochondromatosis-at-the-carpometacarpal-joint-of-the-thumb
#11
Satoru Yonekura, Hiroyoshi Hagiwara, Takahiro Nishimura, Hiroshi Amagai, Mayu Yamamura, Osamu Miyamoto, Sueo Nakama
Synovial osteochondromatosis (SOC) is a benign tumor characterized by synovial connective tissue metaplasia. SOC commonly affects major joints including the knee followed by the hip, elbow, and wrist. SOC cases in the hand are not reported as often as SOC of major joints. Particularly SOC of the carpometacarpal joint of the thumb is rare. We report on a 57-year-old female with primary SOC of the carpometacarpal joint of her left thumb. Surgical excision was performed and the patient had no symptoms with full range of motion of her left thumb...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28167875/locking-plate-arthrodesis-compares-favorably-with-lrti-for-thumb-trapeziometacarpal-arthrosis-early-outcomes-from-a-longitudinal-cohort-study
#12
Nikolas H Kazmers, K J Hippensteel, Ryan P Calfee, Lindley B Wall, Martin I Boyer, Charles A Goldfarb, Richard H Gelberman, Daniel A Osei
BACKGROUND: Trapeziometacarpal arthrodesis (TMA) has been complicated by nonunion and hardware failure. QUESTIONS/PURPOSES: We hypothesized that modification of the TMA technique with a locking cage plate construct would afford reliable bony union while producing greater hand function than trapeziectomy with ligament reconstruction and tendon interposition (LRTI) at early follow-up. METHODS: We enrolled 36 consecutive patients with trapeziometacapal osteoarthritis (14 TMA patients (15 thumbs), 22 LRTI patients (22 thumbs))...
February 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28167410/objects-rapidly-prime-the-motor-system-when-located-near-the-dominant-hand
#13
Paula J Rowe, Corinna Haenschel, Maciej Kosilo, Kielan Yarrow
Objects are said to automatically "afford" various actions depending upon the motor repertoire of the actor. Such affordances play a part in how we prepare to handle or manipulate tools and other objects. Evidence obtained through fMRI, EEG and TMS has proven that this is the case but, as yet, the temporal evolution of affordances has not been fully investigated. The aim here was to further explore the timing of evoked motor activity using visual stimuli tailored to drive the motor system. Therefore, we presented three kinds of stimuli in stereoscopic depth; whole hand grasp objects which afforded a power-grip, pinch-grip objects which afforded a thumb and forefinger precision-grip and an empty desk, affording no action...
February 3, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28167312/first-protein-drug-target-s-appraisal-of-lead-likeness-descriptors-to-unfold-the-intervening-chemical-space
#14
Mohd Athar, Mohsin Y Lone, Prakash C Jha
Despite the advances in combinatorial chemistry, high throughput and virtual screening experiments, plethora of clinical studies disquiet due to lead and drug-likeness attritions. For mitigation, the knowledge of physicochemical properties are really useful for guiding and selection of compounds from libraries dictated by certain rule of thumbs. However, robust bio-technological and instrumental innovations have created exponential increase in novel compounds and databases which compelled rethinking of the evaluation procedures...
January 6, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28166887/effects-of-button-position-on-a-soft-keyboard-muscle-activity-touch-time-and-discomfort-in-two-thumb-text-entry
#15
Joonho Chang, Bori Choi, Amir Tjolleng, Kihyo Jung
Intensive use of the thumbs for text entry on smartphones may contribute to discomfort, pain, or musculoskeletal disorders. This study investigated the effect of twenty-five button positions (5 rows × 5 columns) on a soft keyboard for two-thumb entry. Two experiments measured muscle activity, touch time, and discomfort as a function of the button positions. In Phase I, the muscle activities of two intrinsic (abductor pollicis brevis and first dorsal interossei) and two extrinsic (abductor pollicis longus and extensor digitorum communis) muscles associated with thumb motions were observed for ten college students (age: 24...
April 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28166695/results-of-115-rubis-ii-reverse-thumb-carpometacarpal-joint-prostheses-with-a-mean-follow-up-of-10-years
#16
M Dehl, M Chelli, S Lippmann, S Benaissa, V Rotari, M Moughabghab
: The aim of this study was to assess the clinical and radiological results of the Rubis II thumb carpometacarpal joint reverse prosthesis, at a mean follow-up of 10 years. Between 1997 and 2008, 253 prostheses were implanted in 199 patients; 115 were reviewed. The survival after a mean of 10 years was 89%. At the last follow-up, 70% of prostheses were painless; the others reported moderate or intermittent pain. The satisfaction rate was 98%. The mean opposition was 9 on the Kapandji scale; the mean QuickDASH score was 30...
February 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28166167/stepwise-percutaneous-leverage-technique-to-avoid-posterior-interosseous-nerve-injury-in-pediatric-radial-neck-fracture
#17
Wan-Sun Choi, Kyeong-Jin Han, Doo-Hyung Lee, Ga-Eun Lee, Heon-Ju Kweon, Jae-Ho Cho
OBJECTIVES: To introduce a stepwise percutaneous leverage technique to avoid posterior interosseous nerve (PIN) injury in pediatric patients with radial neck fractures and to evaluate the clinical outcome and the predisposing factors affecting the outcome. DESIGN: Retrospective case series study. SETTING: University level 1 trauma center. PATIENTS: Thirty-four children with a radial neck fracture, who were treated using a stepwise percutaneous leverage technique, were included in the study...
January 24, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28165363/effect-of-experimental-hand-pain-on-training-induced-changes-in-motor-performance-and-corticospinal-excitability
#18
Nicolas Mavromatis, Cécilia Neige, Martin Gagné, Karen T Reilly, Catherine Mercier
Pain influences plasticity within the sensorimotor system and the aim of this study was to assess the effect of pain on changes in motor performance and corticospinal excitability during training for a novel motor task. A total of 30 subjects were allocated to one of two groups (Pain, NoPain) and performed ten training blocks of a visually-guided isometric pinch task. Each block consisted of 15 force sequences, and subjects modulated the force applied to a transducer in order to reach one of five target forces...
February 4, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28164065/localized-tetanus-in-an-adult-patient-case-report
#19
Mohamed Amirali Gulamhussein, Yueyang Li, Abhijit Guha
INTRODUCTION: Tetanus is a severe and potentially fatal infection caused by the bacterium Clostridium tetani. Of all the cases described in literature, generalized tetanus is by far the most common presentation, but it may also present as neonatal tetanus, cephalic tetanus, and localized tetanus, the latter two being much rarer. In this case report, we present the rare form of this disease, i.e., localized tetanus in an adult male with a history of minimal trauma as well as a late, unusual mode of presentation...
September 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28164054/a-very-rare-presentation-of-type-1-monteggia-equivalent-fracture-with-ipsilateral-fracture-of-distal-forearm-approach-with-outcome-case-report
#20
Dhananjay Singh, Bhanu Awasthi, Vikas Padha, Sanjay Thakur
INTRODUCTION: We report a case of Type 1 Monteggia equivalent injury with intact radio-capitellar congruity, associated with epiphyseal fracture of distal radius and distal ulna shaft in an 11-year-old boy. There are only a few cases of Monteggia or Monteggia equivalent injury with ipsilateral forearm fractures in children, and injury pattern being reported by us is not only rare but also the only case reported thus far to the best of our knowledge, Sood et al. described Type 1 equivalent with epiphyseal injuries of both radius and ulna Osada et al...
September 2016: Journal of Orthopaedic Case Reports
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