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https://www.readbyqxmd.com/read/28821642/super-optimal-perceptual-integration-suggests-a-place-based-representation-of-pitch-at-high-frequencies
#1
Bonnie K Lau, Anahita H Mehta, Andrew J Oxenham
Pitch, the perceptual correlate of sound repetition rate or frequency, plays an important role in speech perception, music perception, and listening in complex acoustic environments. Despite its perceptual importance, the neural mechanisms underlying pitch remain poorly understood. Although cortical regions responsive to pitch have been identified, little is known about how pitch information is extracted from the inner ear itself. The two primary theories of peripheral pitch coding involve stimulus-driven spike timing, or phase locking, in the auditory nerve (time code), and the spatial distribution of responses along the length of the cochlear partition (place code)...
August 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28820288/cohesive-silicone-gel-implants-with-smooth-textured-or-polyurethane-coated-surface-to-restore-volume-in-eviscerated-sockets
#2
Cristiano Abreu, Seizo Yamashita, Alicia Galindo-Ferreiro, Marilia Modolo, Claudia H Pellizzon, Carlos R Padovani, Mariangela E A Marques, Silvana A Schellini
The purpose of this article is to evaluate the three different surface coating on cohesive silicone gel implants in eviscerated rabbit eye sockets. Forty-five albino rabbits underwent right eye evisceration and received hemisphere-shaped cohesive silicone gel implants with smooth (Group 1), textured (Group 2), or polyurethane-coated surface (Group 3) in the socket. The animals were euthanized at 7, 30, and 90 days postoperatively. Computed tomography of the orbits was performed prior to euthanasia. Subsequently, the orbital contents were removed and underwent histologic and morphometric examination...
August 18, 2017: Orbit
https://www.readbyqxmd.com/read/28819872/-hearing-restoration-with-cochlear-implants-after-translabyrinthine-vestibular-schwannoma-resection
#3
C Bohr, S Müller, J Hornung, U Hoppe, H Iro
BACKGROUND: Hearing restoration after translabyrinthine vestibular schwannoma resection is a challenge. Because the cochlea can begin to ossify a few months after cochlear or labyrinthine injury, the time interval for cochlear implant surgery is limited. To avoid complete ossification and to prolong the time interval until cochlear implantation, it is possible to insert a placeholder (depth gauge) into the cochlea and perform the cochlear implant surgery at a later time point (two-stage approach)...
August 17, 2017: HNO
https://www.readbyqxmd.com/read/28819826/the-outcome-of-the-partial-resurfacing-arthroplasty-of-the-hip-shows-high-numbers-of-failures-and-conversion-to-total-arthroplasty
#4
Thilo Floerkemeier, Stefan Budde, Nils Wirries, Gabriela von Lewinski, Henning Windhagen, Marco Ezechieli
PURPOSE: Local cartilage and bony defects, which are too large for joint preserving cartilage treatment are difficult to treat. The implantation of a mini-resurfacing implant (Hemicap®, 2med, Hamburg, Germany) may be a possible alternative treatment for these patients. This partial replacement fills the defect and restores a smooth and continuous articular surface. The aim of this study was to determine short- to midterm results of the treatment of local cartilage defects of the femoral head using the Hemicap®...
August 17, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28818455/adipose-derived-stromal-cells-enhance-auditory-neuron-survival-in-an-animal-model-of-sensory-hearing-loss
#5
Philipp Schendzielorz, Maike Vollmer, Kristen Rak, Armin Wiegner, Nashwa Nada, Katrin Radeloff, Rudolf Hagen, Andreas Radeloff
BACKGROUND: A cochlear implant (CI) is an electronic prosthesis that can partially restore speech perception capabilities. Optimum information transfer from the cochlea to the central auditory system requires a proper functioning auditory nerve (AN) that is electrically stimulated by the device. In deafness, the lack of neurotrophic support, normally provided by the sensory cells of the inner ear, however, leads to gradual degeneration of auditory neurons with undesirable consequences for CI performance...
August 14, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28817742/minimum-abutment-height-to-eliminate-bone-loss-influence-of-implant-neck-design-and-platform-switching
#6
Sergio Spinato, Pablo Galindo-Moreno, Fabio Bernardello, Davide Zaffe
PURPOSE: This retrospective study quantitatively analyzed the minimum prosthetic abutment height to eliminate bone loss after 4.7-mm-diameter implant placement in maxillary bone and how grafting techniques can affect the marginal bone loss in implants placed in maxillary areas. MATERIALS AND METHODS: Two different implant types with a similar neck design were singularly placed in two groups of patients: the test group, with platform-switched implants, and the control group, with conventional (non-platform-switched) implants...
August 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28817741/reconstruction-of-a-severely-atrophied-alveolar-ridge-by-computer-aided-gingival-simulation-and-3d-printed-surgical-guide-a-case-report
#7
In-Seok Song, Mi-Ran Lee, Jae-Jun Ryu, Ui-Lyong Lee
Dental implants positioned in severely atrophied anterior maxillae require esthetic or functional compromises. This case report describes the rehabilitation of a severely atrophied alveolar ridge with a three-dimensional (3D) computer-aided design/computer-aided manufacture (CAD/CAM) surgical guide. A 50-year-old woman had a severely atrophied anterior maxilla with unfavorably positioned dental implants. Functional and esthetic prosthodontic restoration was difficult to achieve. An anterior segmental osteotomy was planned to reposition the dental implants...
August 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28817139/immediate-one-time-low-profile-abutment-to-enhance-peri-implant-soft-and-hard-tissue-stability-in-the-esthetic-zone
#8
Stavros Pelekanos, Georgia Pozidi
Reductions in peri-implant bone height have been acknowledged as a normal consequence of implant therapy. Various restorative factors contribute to this phenomenon. One is repeated abutment retightening, which causes a mechanical disruption at the implant-abutment interface, leading to soft tissue recession. Several investigators proposed placement of the definitive abutment after implant placement as a solution to the problem. The definitive use of an intermediate abutment after implant placement seems to positively affect the soft tissue response...
September 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28817132/plasma-of-argon-cleaning-treatment-on-implant-abutments-in-periodontally-healthy-patients-six-years-postloading-results-of-a-randomized-controlled-trial
#9
Luigi Canullo, Marco Tallarico, Miguel Penarrocha, Giuseppe Corrente, Joseph Fiorellini, David Penarrocha
The aim of this randomized, match-paired, triple-blinded, controlled clinical trial was to assess the 6-year radiographic changes around customized platform-switched abutments placed according to the one abutment-one time concept, with and without plasma of argon cleaning treatment. A total of 20 periodontally healthy patients received one maxillary implant between the premolars. Immediately before stage 2 surgery and abutment connection, patients were randomly assigned to the control (cleaning protocol by steam) or test group (plasma of argon treatment)...
September 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28817129/interproximal-papilla-stability-around-cad-cam-and-stock-abutments-in-anterior-regions-a-2-year-prospective-multicenter-cohort-study
#10
Diego Lops, Andrea Parpaiola, Gianluca Paniz, Luca Sbricoli, Vanessa Ruiz Magaz, Alvise Cenzi Venezze, Eriberto Bressan, Edoardo Stellini
The aim of this study was to compare the interproximal papilla stability of restorations supported by computer-aided design/computer-assisted manufacture (CAD/CAM) abutments to those supported by prefabricated stock abutments in anterior areas over a 2-year follow-up. Abutments were selected depending on implant inclination and thickness of buccal peri-implant soft tissues from the following: zirconia stock, titanium stock, zirconia CAD/CAM and titanium CAD/CAM. Differences between the height of the papilla tip were measured (REC)...
September 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28817125/long-term-retrospective-evaluation-of-success-of-narrow-diameter-implants-in-esthetic-areas-a-consecutive-case-series-with-3-to-14-years-follow-up
#11
Stuart J Froum, Ye Shi, Sang-Choon Cho
This retrospective study reports on the outcome of 19 narrow-diameter implants (NDIs) placed in 14 consecutively treated patients 3 to 14 years postloading. Peri-implant bone remodeling, bone loss, esthetic outcomes, and patient satisfaction with the final restoration were evaluated. No implant failures or prosthetic complications were reported, yielding a 100% survival rate and a 84.2% success rate. All 14 patients reported that they were very satisfied with the esthetic results. The average mesial and distal bone remodeling was 1...
September 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28816718/double-composite-tissue-z-plasty-technique-for-anatomical-restoration-of-severe-nasal-deformity-in-secondary-unilateral-cleft-lip
#12
Jiao Wei, Tanja Herrler, Hua Xu, Qingfeng Li, Chuanchang Dai
BACKGROUND: Patients with secondary unilateral cleft lip are regularly affected by serious nasal deformities especially of the alar and nasal floor. A large number of techniques for correction have been published, but symmetrical restoration of severe nasal deformation is difficult to achieve. We propose an innovative approach for anatomical restoration for this entity of nasal deformities to achieve long-term symmetrical appearance and muscular function. METHODS: A total of 68 patients with severe nasal deformity due to secondary unilateral cleft lip underwent reconstructive surgery using a double composite tissue Z-plasty technique for anatomical restoration of cartilage, muscle, and soft tissue layers...
August 14, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28816360/c-c-motif-chemokine-ligand-2-regulates-lps-induced-inflammation-and-er-stress-to-enhance-proliferation-of-bovine-endometrial-epithelial-cells
#13
Whasun Lim, Hyocheol Bae, Fuller W Bazer, Sung-Man Kim, Gwonhwa Song
Chemokines play an important role in regulating the complex immune system at the maternal-fetal interface during pregnancy. Among various chemokines, C-C motif chemokine ligand 2 (CCL2) plays a role in the recruitment of immune regulatory cells to implantation sites within the endometrium. In cattle, CCL2 is abundantly expressed in the uterine endometrium. However, its intracellular signaling has not been identified. In this study, we examined the effects of CCL2 on bovine endometrial (BEND) cell proliferation...
August 17, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28816291/-influence-of-the-interforaminal-arch-form-of-edentulous-mandibles-on-design-of-all-on-4-preliminary-research-based-on-conebeam-computed-tomography
#14
S Y Li, G Li, H L Feng, S X Pan
OBJECTIVE: To classify the interforaminal arch form of edentulous mandibles by measuring the anterior-posterior distance (A-P distance) of implants planned to be inserted in "All-on-4" protocol using conebeam computed tomography (CBCT) data, and to investigate the influence of the arch form on the "All-on-4" distally tilted implants. METHODS: Seventy-four CBCT images of edentulous mandibles were collected, including 35 males and 39 females respectively. "All-on-4"implant supported fixed prostheses were designed for these patients based on the CBCT data...
August 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28814826/comparison-between-bilateral-implantation-of-a-trifocal-intraocular-lens-and-blended-implantation-of-two-bifocal-intraocular-lenses
#15
César Vilar, Wilson Takashi Hida, André Lins de Medeiros, Klayny Rafaella Pereira Magalhães, Patrick Frensel de Moraes Tzelikis, Mario Augusto Pereira Dias Chaves, Antônio Francisco Pimenta Motta, Pedro Carlos Carricondo, Milton Ruiz Alves, Walton Nosé
PURPOSE: To compare visual outcomes and performance between bilateral implantation of a diffractive trifocal intraocular lens (IOL) Acrysof(®)PanOptix(®) TFNT00 and blended implantation of two different near add power bifocal IOLs: Acrysof(®) Restor(®) SV25T0 in dominant eye and Acrysof(®) Restor(®) SN6AD1 in the nondominant eye. METHODS: This prospective, nonrandomized, consecutive and comparative study assessed 20 patients (40 eyes) who had bilateral cataract surgery performed using the IOLs described...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28809637/-comparison-of-short-therm-results-of-conservative-versus-operative-treatment-of-distal-ulna-fractures-associated-with-distal-radius-fracture-treated-by-plate-osteosynthesis
#16
P Meluzinová, L Kopp, P Dráč, K Edelmann, P Obruba
PURPOSE OF THE STUDY The study aims to evaluate and compare the results of conservative and operative treatment of individual types of distal ulna fractures associated with distal radius fracture treated by plate osteosynthesis and to verify the conclusions of the other authors regarding the recommended therapeutic procedures in these fractures. MATERIAL AND METHODS In the period from 08/2013 to 09/2015, a total of 81 patients participated in the prospective randomised study, with the mean follow-up period of 24 months (6-36)...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28808982/radial-head-prosthesis-results-overview
#17
E Carità, A Donadelli, L Cugola, P Perazzini
BACKGROUND/PURPOSE: Radial head replacement is frequently used in treatment of radial head fractures or sequela. Impossibility to restore a correct anatomy, acute elbow traumatic instability and failure of osteosynthesis hardware are the most common indications. The authors describe their case studies and results on the implantation of various radial head prostheses. MATERIALS: Between June 2005 and June 2016, 28 radial head prostheses were implanted in the same number of patients with an average follow-up of 49 months (6-104)...
August 14, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28808628/distal-radius-volar-rim-plate-technical-and-radiographic-considerations
#18
Michelle Spiteri, Darren Roberts, Wayne Ng, Jamie Matthews, Dominic Power
AIM: To determine technical considerations and radiographic outcomes of the Synthes volar rim distal radius plate to treat complex intra-articular fractures. METHODS: This review highlights technical considerations learnt using this implant since it was introduced in a major trauma unit in November 2011, including anatomical reduction and whether this was maintained radiographically. RESULTS: Twenty-six of the 382 internally fixed distal radial fractures at our unit (6...
July 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28808014/adaptive-benefit-of-cross-modal-plasticity-following-cochlear-implantation-in-deaf-adults
#19
Carly A Anderson, Ian M Wiggins, Pádraig T Kitterick, Douglas E H Hartley
It has been suggested that visual language is maladaptive for hearing restoration with a cochlear implant (CI) due to cross-modal recruitment of auditory brain regions. Rehabilitative guidelines therefore discourage the use of visual language. However, neuroscientific understanding of cross-modal plasticity following cochlear implantation has been restricted due to incompatibility between established neuroimaging techniques and the surgically implanted electronic and magnetic components of the CI. As a solution to this problem, here we used functional near-infrared spectroscopy (fNIRS), a noninvasive optical neuroimaging method that is fully compatible with a CI and safe for repeated testing...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807217/adenosine-triphosphate-as-a-molecular-mediator-of-the-vascular-response-to-injury
#20
Christy M Guth, Weifung Luo, Olukemi Jolayemi, Kalyan S Chadalavada, Padmini Komalavilas, Joyce Cheung-Flynn, Colleen M Brophy
BACKGROUND: Human saphenous veins used for arterial bypass undergo stretch injury at the time of harvest and preimplant preparation. Vascular injury promotes intimal hyperplasia, the leading cause of graft failure, but the molecular events leading to this response are largely unknown. This study investigated adenosine triphosphate (ATP) as a potential molecular mediator in the vascular response to stretch injury, and the downstream effects of the purinergic receptor, P2X7R, and p38 MAPK activation...
August 2017: Journal of Surgical Research
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