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https://www.readbyqxmd.com/read/28924826/volumetric-and-linear-changes-at-dental-implants-following-grafting-with-volume-stable-three-dimensional-collagen-matrices-or-autogenous-connective-tissue-grafts-6-month-data
#1
Nadja Naenni, Stefan P Bienz, Goran I Benic, Ronald E Jung, Christoph H F Hämmerle, Daniel S Thoma
OBJECTIVES: The objective of this study was to test whether or not soft tissue augmentation with a volume-stable collagen matrix (VCMX) leads to similar volume gain around dental implants compared to autogenous subepithelial connective tissue graft (SCTG). MATERIALS AND METHODS: In 12 adult beagle dogs, immediate implants were placed with simultaneous guided bone regeneration. After 25-45 weeks, soft tissue augmentation was randomly performed using VCMX, SCTG, or a sham-operated control...
September 18, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28922543/in-vitro-and-in-vivo-degradation-of-microfiber-bioresorbable-coronary-scaffold
#2
Chi-Hung Huang, Sheng-Yang Lee, Sonida Horng, Louis-Georges Guy, Ting-Bin Yu
The degradation of Mirage Bioresorbable Microfiber Scaffold was evaluated in vitro and in vivo. The degradation in polymer molecular weight (MW), strut morphology, and integrity was accessed using gel permeation chromatography (GPC), X-ray micro-computed tomography (micro-CT) evaluation. To simulate the physiological degradation in vitro, scaffolds were deployed in silicone mock vessels connected to a peristaltic pumping system, which pumps 37°C phosphate-buffered saline (PBS, pH 7.4) at a constant rate. At various time points (30D, 60D, 90D, 180D, 270D, and 360D), the MW of microfibers decreased to 57...
September 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28920893/a-functional-genetic-scheme-for-seizure-forecasting-in-canine-epilepsy
#3
E Bou Assi, D K Nguyen, S Rihana, M Sawan
OBJECTIVE: The objective of this work is the development of an accurate seizure forecasting algorithm that considers brain's functional connectivity for electrode selection. METHODS: We start by proposing Kmeans-directed transfer function, an adaptive functional connectivity method intended for seizure onset zone localization in bilateral intracranial EEG recordings. Electrodes identified as seizure activity sources and sinks are then used to implement a seizure-forecasting algorithm on long-term continuous recordings in dogs with naturallyoccurring epilepsy...
September 13, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28919866/t-wave-safety-margin-during-the-process-of-icd-implantation-as-a-novel-predictor-of-t-wave-oversensing
#4
Ya-Xun Sun, Jing Gao, Chen-Yang Jiang, Yu-Mei Xue, Yi-Zhou Xu, Gang Liu, Ji-Hong Guo, Xia Sheng, Yang Ye, Hong He, Yun-Tao Zhao, Hector Barajas-Martinez, Guo-Sheng Fu, Dan Hu
Introduction: T wave oversensing (TWOS) is a major drawback of implantable cardioverter defibrillator (ICD) and data on predictors of TWOS in ICD is limited. We aimed to calculate a novel index of T wave safety margin (TWSM) and assess its potential for evaluating TWOS during the procedure of ICD implantation. Methods and Results: Thirty-two consecutive patients with ICD implantation were enrolled. During each procedure of ICD implantation, different ICD generators were connected to implanted sensing lead through active-fixation leads and bridging cables...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28906504/association-between-clinical-and-microbiologic-cluster-profiles-and-peri-implantitis
#5
Luigi Canullo, Miguel Peñarrocha, Alberto Monje, Andres Catena, Hom-Lay Wang, David Peñarrocha
PURPOSE: The correlation between associated local factors and peri-implantitis remains unknown. The aim of this study was to investigate the association between the clinical and microbiologic profiles and peri-implantitis to eventually categorize different groups of this disease. MATERIALS AND METHODS: Subjects with at least one implant presenting signs of peri-implantitis were selected. The clinical, radiographic, occlusal, and microbiologic profiles of these infected implants were collected...
September 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28905805/a-novel-model-of-acellular-dermal-matrix-plug-for-anal-fistula-treatment-report-of-a-case-and-surgical-consideration-based-on-first-utility-in-poland
#6
Adam Bobkiewicz, Łukasz Krokowicz, Maciej Borejsza-Wysocki, Tomasz Banasiewicz
Anal fistula (AF) is a pathological connection between anus and skin in its surroundings. The main reason for the formation of anal fistula is a bacterial infection of the glands within the anal crypts. One of the modern techniques for the treatment of fistulas that do not interfere with the sphincters consists in implantation of a plug made from collagen material. We are presenting the first Polish experience with a new model of biomaterial plug for the treatment of anal fistula. We also point out key elements of the procedure (both preoperative and intraoperative) associated with this method...
August 31, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/28898426/differences-between-inflammatory-and-catabolic-mediators-of-peri-implantitis-and-periodontitis-lesions-following-initial-mechanical-therapy-an-exploratory-study
#7
M Ghighi, A Llorens, B Baroukh, C Chaussain, P Bouchard, M Gosset
BACKGROUND AND OBJECTIVE: The aim of this study was to analyze the differences in inflammatory and catabolic mediators expressed in peri-implantitis compared to periodontitis lesions after non-surgical therapy. Peri-implantitis is associated with a faster rate of bone loss when compared with periodontitis, and peri-implant non-surgical therapy is ineffective to cure peri-implantitis. This may be due to persistent inflammation in peri-implantitis tissues after initial mechanical treatment...
September 12, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28893929/distinct-patterns-of-temporal-and-directional-connectivity-among-intrinsic-networks-in-the-human-brain
#8
James M Shine, Aaron Kucyi, Brett L Foster, Stephan Bickel, Danhong Wang, Hesheng Liu, Russell A Poldrack, Liang-Tien Hsieh, Jen Chun Hsiang, Josef Parvizi
To determine the spatiotemporal relationships among intrinsic networks of the human brain, we recruited seven neurosurgical patients (4 males; 3 females) who were implanted with intracranial depth electrodes. We first identified canonical resting state networks at the individual subject level using an iterative matching procedure on each subject's resting state fMRI data. We then introduced single electrical pulses to fMRI pre-identified nodes of the default (DN), frontoparietal (FPN) and salience networks (SN) while recording evoked responses in other recording sites within the same networks...
September 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28888428/displacement-comparison-of-cad-cam-titanium-and-zirconia-abutments-to-implants-with-different-conical-connections
#9
Burak Yilmaz, Shervin Hashemzadeh, Jeremy D Seidt, Nancy L Clelland
PURPOSE: To compare the displacements of CAD-CAM zirconia and titanium abutments into different internal connection systems after torquing. METHODS: OsseoSpeed EV and OsseoSpeed TX implants (n=10) were placed in resin blocks. Zirconia and titanium abutments (n=5) were first hand tightened and then tightened to the recommended torque (20Ncm for TX and 25Ncm for EV). Displacements of abutments between screw tightening by hand and torque driver was measured using three-dimensional digital image correlation (3D DIC) technique...
September 6, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28887959/%C3%AE-tcp-cements-prepared-by-syringe-foaming-influence-of-na2hpo4-and-surfactant-concentration
#10
A F Vásquez, S Domínguez, L A Loureiro Dos Santos
The lack of intrinsic open porosity in calcium phosphate cements slows down the resorption rate and bone ingrowth when implanted In Vivo. In this study, macroporous structures were obtained by mixing α-TCP cement with a foamed liquid phase containing different concentrations of sodium hydrogen phosphate and a nonionic surfactant. The cement paste was prepared by hand mixing in a novel system of two syringes connected by a tube. Two different liquid to powder (L/P) ratios were used to prepare the cement paste...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28886793/scalloped-implant-abutment-connections-appear-to-have-similar-implant-survival-rates-as-flat-implant-abutment-connections-but-may-be-associated-with-greater-marginal-bone-loss
#11
Tahira Devji
No abstract text is available yet for this article.
September 3, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28886772/dental-implants
#12
REVIEW
Jason A Griggs
Systematic reviews of literature over the period between 2008 and 2017 are discussed regarding clinical evidence for the factors affecting survival and failure of dental implants. The factors addressed include publication bias, tooth location, insertion torque, collar design, implant-abutment connection design, implant length, implant width, bone augmentation, platform switching, surface roughness, implant coatings, and the use of ceramic materials in the implant body and abutment.
October 2017: Dental Clinics of North America
https://www.readbyqxmd.com/read/28884953/a-retro-prospective-effectiveness-study-on-3448-implant-operations-at-one-referral-clinic-a-multifactorial-analysis-part-i-clinical-factors-associated-to-early-implant-failures
#13
Torsten Jemt
BACKGROUND: Limited numbers of large effectiveness studies on routine dental implant treatment are available in the literature. PURPOSE: To report retro-prospective data on prevalence of early implant failures in a large number of routine patients/operations at 1 referral clinic. MATERIALS AND METHODS: A total of 2848 patients were consecutively provided with 9582 implants with an anodized surface (Nobel Biocare AB) during 3448 implant operations between 2003 and 2011...
September 8, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28874994/comparison-of-fit-accuracy-and-torque-maintenance-of-zirconia-and-titanium-abutments-for-internal-tri-channel-and-external-hex-implant-connections
#14
Hakimeh Siadat, Elaheh Beyabanaki, Niloufar Mousavi, Marzieh Alikhasi
PURPOSE: This in vitro study aimed to evaluate the effect of implant connection design (external vs. internal) on the fit discrepancy and torque loss of zirconia and titanium abutments. MATERIALS AND METHODS: Two regular platform dental implants, one with external connection (Brånemark, Nobel Biocare AB) and the other with internal connection (Noble Replace, Nobel Biocare AB), were selected. Seven titanium and seven customized zirconia abutments were used for each connection design...
August 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28872722/impact-of-intentional-overload-on-joint-stability-of-internal-implant-abutment-connection-system-with-different-diameter
#15
Ji-Hye Lee, Won Lee, Yoon-Hyuk Huh, Chan-Jin Park, Lee-Ra Cho
PURPOSE: To evaluate the axial displacement of the implant-abutment assembly of different implant diameter after static and cyclic loading of overload condition. MATERIALS AND METHODS: An internal conical connection system with three diameters (Ø 4.0, 4.5, and 5.0) applying identical abutment dimension and the same abutment screw was evaluated. Axial displacement of abutment and reverse torque loss of abutment screw were evaluated under static and cyclic loading conditions...
September 5, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28870417/characterization-of-an-innovative-intramedullary-nail-for-diaphyseal-fractures-of-long-bones
#16
V Filardi
In this paper, an innovative design of nail for fractures occurring on long bones has been investigated. Its functioning is based essentially on sliding of conical surfaces, located in a spindle and in holding pins. Spindle and holding pins are connected together by a sleeve. The sliding transforms the rotational and translational motion of the spindle to a radial expansion of the holding pins, protruding inside the intramedullary canal. In order to evaluate mechanical behavior of the prosthesis different benchmarks and tests were numerically performed by an FE code...
September 1, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28867525/a-customised-digitally-engineered-solution-for-fixed-dental-rehabilitation-in-severe-bone-deficiency-a-new-innovative-line-extension-in-implant-dentistry
#17
Nils-Claudius Gellrich, Rüdiger M Zimmerer, Simon Spalthoff, Philipp Jehn, Philipp-Cornelius Pott, Majeed Rana, Björn Rahlf
OBJECTIVES: Numerous procedures including soft and hard tissue reconstructions are necessary to allow for final implant-borne dental rehabilitation in patients with severe alveolar atrophy or resected jaws. In these cases, customised digitally engineered patient solutions for fixed or removable dental rehabilitation provide an innovative line extension to conventional implant dentistry. MATERIAL AND METHODS: A wax-up was performed on plaster models that were scanned by 3D laser...
August 3, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28867345/a-pitx3-egfp-reporter-line-reveals-connectivity-of-dopamine-and-non-dopamine-neuronal-subtypes-in-grafts-generated-from-human-embryonic-stem-cells
#18
Jonathan C Niclis, Carlos W Gantner, Cameron P J Hunt, Jessica A Kauhausen, Jennifer C Durnall, John M Haynes, Colin W Pouton, Clare L Parish, Lachlan H Thompson
Development of safe and effective stem cell-based therapies for brain repair requires an in-depth understanding of the in vivo properties of neural grafts generated from human stem cells. Replacing dopamine neurons in Parkinson's disease remains one of the most anticipated applications. Here, we have used a human PITX3-EGFP embryonic stem cell line to characterize the connectivity of stem cell-derived midbrain dopamine neurons in the dopamine-depleted host brain with an unprecedented level of specificity. The results show that the major A9 and A10 subclasses of implanted dopamine neurons innervate multiple, developmentally appropriate host targets but also that the majority of graft-derived connectivity is non-dopaminergic...
September 12, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28866149/three-dimensional-finite-element-analysis-of-occlusal-splint-and-implant-connection-on-stress-distribution-in-implant-supported-fixed-dental-prosthesis-and-peri-implantal-bone
#19
Vívian Dos Santos Marsico, Roberto Brunow Lehmann, Cristiane Aparecida de Assis Claro, Marina Amaral, Rafael Pino Vitti, Ana Christina Claro Neves, Lais Regiane da Silva Concilio
The aim of this study was to investigate the influence of occlusal splint therapy on the stress distribution of implant-supported fixed dental prosthesis (FDP) and peri-implantal bone structures using three-dimensional (3D) finite element analysis (FEA). The system consisted of two implants (positioned on region of second premolar and second molar) as retainers of fixed porcelain-fused-to-metal 3-unit FDP (first molar as pontic element). Two implant connections systems (external and internal hexagon) were tested...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28862465/lateral-access-pouch-technique-to-treat-implants-with-gingival-recession
#20
Douglas H Mahn
Connective tissue grafting is a means of developing stable and natural-looking soft-tissue architecture. The use of a subepithelial connective tissue graft (SCTG) has been successful in achieving root coverage and augmenting tissue thickness. Tunnel techniques enable root coverage with results that appear natural. These techniques can be applied to the treatment of dental implants with gingival recession. The purpose of this article is to demonstrate the use of a SCTG and a lateral access pouch in the treatment of multiple gingival recession defects affecting adjacent implants...
September 2017: Compendium of Continuing Education in Dentistry
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