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Implant passivity

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https://www.readbyqxmd.com/read/27893512/flap-designs-for-flap-advancement-during-implant-therapy-a-systematic-review
#1
Alexandra B Plonka, Rachel A Sheridan, Hom-Lay Wang
PURPOSE: Guided bone regeneration (GBR) procedures allow ridge augmentation before or at time of implant placement. GBR outcomes rely on primary passive tension-free wound closure, which may be achieved by a variety of flap designs and surgical procedures. A comprehensive literature review of flap design and management is provided, including material types, incision design, reflection, releasing, and suturing techniques. MATERIALS AND METHODS: Two reviewers completed a literature search using the PubMed database and a manual search of relevant journals...
November 23, 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27881321/a-digital-approach-integrating-facial-scanning-in-a-cad-cam-workflow-for-complete-mouth-implant-supported-rehabilitation-of-patients-with-edentulism-a-pilot-clinical-study
#2
Bassam Hassan, Beatriz Gimenez Gonzalez, Ali Tahmaseb, Marcus Greven, Daniel Wismeijer
STATEMENT OF PROBLEM: Complete-mouth implant-supported rehabilitations are challenging because of the multiple surgical and prosthetic steps involved in clinical evaluations to assure passive prosthesis fit and optimal esthetic and functional outcomes. As a result, these rehabilitations are usually associated with substantial clinical time, patient discomfort, and high treatment cost. PURPOSE: The purpose of this pilot clinical study was to evaluate a novel digital approach integrating digital intraoral dental and extraoral facial scanning information to design and mill a computer-aided design and computer-aided manufacturing (CAD-CAM) implant-retained prosthesis for patients with complete edentulism...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27867108/poly-3-4-ethylenedioxythiophene-graphene-oxide-composite-coatings-for-controlling-magnesium-implant-corrosion
#3
Kasey Catt, Huaxiu Li, X Tracy Cui
: Magnesium (Mg) is a promising biodegradable implant material because of its appropriate mechanical properties and safe degradation products. However, in vivo corrosion speed and hydrogen gas production need to be controlled for uses in biomedical applications. Here we report the development of a conducting polymer 3,4-ethylenedioxythiphene (PEDOT) and graphene oxide (GO) composite coating as a corrosion control layer. PEDOT/GO was electropolymerized on Mg samples in ethanol media. The coated Mg samples were subjected to various corrosion tests...
November 17, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27861426/mastering-mitral-leaflets-coaptation-after-valve-repair-with-adjustable-mitral-annuloplasty-ring-prove-of-concept-in-mock-loop-study
#4
Piergiorgio Tozzi, Daniel Hayoz, Carlo Antona, Gianfranco B Fiore, Giuseppe Siniscalchi, Enrico Ferrari, Gérard Baeriswyl, Riccardo Vismara
This investigation sought to determine the feasibility of a novel mitral ring designed to reshape mitral annulus on beating heart, after surgery. The mitral ring is intended to improve mitral leaflets coaptation to correct residual and recurrent mitral regurgitations. It could also provide progressive correction of mitral regurgitation. The device was tested in ex vivo beating heart model.The novel mitral ring is selectively deformable in P1, P2 and P3 segments using a dedicated angioplasty-type balloon. The deformation should increase leaflets' coaptation reducing distance between the two leaflets...
November 15, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/27860159/evaluation-of-corrosion-resistance-of-implant-use-ti-zr-binary-alloys-with-a-range-of-compositions
#5
Teisuke Akimoto, Takeshi Ueno, Yusuke Tsutsumi, Hisashi Doi, Takao Hanawa, Noriyuki Wakabayashi
Although titanium-zirconium (Ti-Zr) alloy has been adopted for clinical applications, the ideal proportion of Zr in the alloy has not been identified. In this study, we investigated the biocompatibility of Ti-Zr alloy by evaluating its corrosion resistance to better understand whether there is an optimal range or value of Zr proportion in the alloy. We prepared pure Ti, Ti-30Zr, Ti-50Zr, Ti-70Zr, and pure Zr (mol% of Zr) samples and subjected them to anodic polarization and immersion tests in a lactic acid + sodium chloride (NaCl) solution and artificial saliva...
November 18, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27859544/lateral-soft-tissue-structures-contribute-to-cruciate-retaining-total-knee-arthroplasty-stability
#6
Kiron K Athwal, Hadi El Daou, Breck Lord, Andrew J Davies, William Manning, Ferdinando Rodriguez Y Baena, David J Deehan, Andrew A Amis
Little information is available to surgeons regarding how the lateral structures prevent instability in the replaced knee. The aim of this study was to quantify the lateral soft-tissue contributions to stability following cruciate-retaining total knee arthroplasty (CR TKA). Nine cadaveric knees were tested in a robotic system at full extension, 30°, 60°, and 90° flexion angles. In both native and CR implanted states, ±90 N anterior-posterior force, ±8 Nm varus-valgus, and ±5 Nm internal-external torque were applied...
November 9, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27858086/interaction-between-nmda-and-cb2-function-in-the-dorsal-hippocampus-on-memory-consolidation-impairment-an-isobologram-analysis
#7
Mohammad Nasehi, Marziyeh Hajikhani, Mohaddeseh Ebrahimi-Ghiri, Mohammad-Reza Zarrindast
RATIONALE: Convincing evidence has supported the pivotal role of N-methyl-D-aspartate receptors (NMDARs) and CB2Rs in the regulation of learning and memory. OBJECTIVE: In this study, the role of hippocampal (CA1 region) CB2 receptors on aversive memory consolidation deficit induced by D-AP5, a NMDA receptor antagonist, was evaluated. METHODS: Adult male Wistar rats received cannula implants that bilaterally targeted the CA1 region. Long-term memory was examined using the step-through type of passive avoidance task...
November 17, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/27829472/post-market-surveillance-to-detect-adverse-events-associated-with-melody%C3%A2-valve-implantation
#8
Kevin D Hill, Bryan H Goldstein, Michael J Angtuaco, Patricia Y Chu, Gregory A Fleming
OBJECTIVE: The aim of this study was to describe previously unrecognised or under-recognised adverse events associated with Melody® valve implantation. BACKGROUND: In rare diseases and conditions, it is typically not feasible to conduct large-scale safety trials before drug or device approval. Therefore, post-market surveillance mechanisms are necessary to detect rare but potentially serious adverse events. METHODS: We reviewed the United States Food and Drug Administration's Manufacturer and User Facility Device Experience (MAUDE) database and conducted a structured literature review to evaluate adverse events associated with on- and off-label Melody® valve implantation...
November 10, 2016: Cardiology in the Young
https://www.readbyqxmd.com/read/27825593/a-soft-tissue-preserving-method-for-evaluating-the-impact-of-posterior-tibial-slope-on-kinematics-during-cruciate-retaining-total-knee-arthroplasty-a-validation-study
#9
Yifei Dai, Laurent D Angibaud, Jean-Yves Jenny, Cyril Hamad, Amaury Jung, Michael B Cross
BACKGROUND: The reconstructed posterior tibial slope (PTS) plays a significant role in restoring knee kinematics in cruciate-retaining total knee arthroplasty. However, conventional methods for the investigation of PTS can be limited by sample size or prone to errors due to damages to the bone and/or soft tissues. The purpose of this study was to validate a novel method for the evaluation of the effects of PTS on knee kinematics. METHODS: Seven computer-assisted cruciate-retaining TKAs were performed by two surgeons on healthy cadaveric knees...
November 4, 2016: Knee
https://www.readbyqxmd.com/read/27810845/comparison-of-regularity-detection-between-individuals-with-and-without-speech-in-noise-problems-using-electrophysiological-methods
#10
Mehmet Yaralı, Süha Yağcıoğlu, Ayşe Gül Güven, Songül Aksoy
OBJECTIVE: To analyze the cortical representations of auditory regularities and the relation between these representations and speech-in-noise (SIN) abilities and to compare two groups of participants with different SIN abilities on these cortical measures. MATERIALS AND METHODS: In total, 22 participants aged 20-40 years with normal hearing and without noise exposure, brain stem level-processing issues, neurological/psychiatric issues, or related medication were presented with three different stimuli resembling auditory regularities appearing after random sounds as well as a random series of sounds...
August 1, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27791052/ultrathin-transferred-layers-of-thermally-grown-silicon-dioxide-as-biofluid-barriers-for-biointegrated-flexible-electronic-systems
#11
Hui Fang, Jianing Zhao, Ki Jun Yu, Enming Song, Amir Barati Farimani, Chia-Han Chiang, Xin Jin, Yeguang Xue, Dong Xu, Wenbo Du, Kyung Jin Seo, Yiding Zhong, Zijian Yang, Sang Min Won, Guanhua Fang, Seo Woo Choi, Santanu Chaudhuri, Yonggang Huang, Muhammad Ashraful Alam, Jonathan Viventi, N R Aluru, John A Rogers
Materials that can serve as long-lived barriers to biofluids are essential to the development of any type of chronic electronic implant. Devices such as cardiac pacemakers and cochlear implants use bulk metal or ceramic packages as hermetic enclosures for the electronics. Emerging classes of flexible, biointegrated electronic systems demand similar levels of isolation from biofluids but with thin, compliant films that can simultaneously serve as biointerfaces for sensing and/or actuation while in contact with the soft, curved, and moving surfaces of target organs...
October 18, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27784979/central-cortical-cleanup-and-zonular-deficiency
#12
EDITORIAL
Ahmad M Mansour, Rafic S Antonios, Iqbal Ike K Ahmed
BACKGROUND: Complete removal of the cortex has been advocated to prevent posterior capsular opacification but carries the risk of zonular dehiscence, hence there is a need for a safe maximal cortical cleanup technique in eyes with severe diffuse zonulopathy in subjects above age 90. METHODS: We used bimanual central cortical cleaning by elevating central fibers and aspirating them toward the periphery. Peripheral cortical fibers were removed passively only when they became loose due to copious irrigation...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27775699/susd2-expression-in-high-grade-serous-ovarian-cancer-correlates-with-increased-patient-survival-and-defective-mesothelial-clearance
#13
J N Sheets, M Iwanicki, J F Liu, B E Howitt, M S Hirsch, J A A Gubbels, R Drapkin, K A Egland
The cause of death among the majority of epithelial ovarian cancer (EOC) patients involves passive dissemination of cancer cells within the peritoneal cavity and subsequent implantation of cancer spheroids into adjacent organs. Thus, it is important to identify the factors that mediate EOC metastasis and implantation, including clearance of the mesothelium. Sushi domain containing 2 (SUSD2) encodes a type I transmembrane protein containing several functional domains inherent to adhesion molecules. Immunohistochemical analysis determined the presence of SUSD2 in several subtypes of EOC, with the strongest staining observed in high-grade serous ovarian carcinomas (HGSOCs)...
October 24, 2016: Oncogenesis
https://www.readbyqxmd.com/read/27740458/arthroplasty-of-the-proximal-interphalangeal-joint-with-the-tactys-%C3%A2-prosthesis-preliminary-results-after-a-minimum-follow-up-of-2-years
#14
L Athlani, E Gaisne, P Bellemère
The TACTYS(®) implant is a new anatomic gliding articular and modular prosthesis for the proximal interphalangeal (PIP) joint. We report preliminary results with a minimum follow-up of 2 years. Twenty-two patients with a mean age of 63 years were operated on at a single center by two senior hand surgeons. Indications were painful and stiff PIP joints. The joint damage was caused by osteoarthritis (18 cases), post-traumatic arthritis (3) and rheumatoid arthritis (1). All prostheses were implanted through a dorsal mid-line transtendinous approach...
June 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27739555/evaluation-of-the-relationship-of-tibiofemoral-kinematics-before-and-after-total-knee-replacement-in-an-in-vitro-model-of-cranial-cruciate-deficiency-in-the-dog
#15
Rebecca N Howie, Timothy L Foutz, Curtis C Cathcart, Jeff S Burmeister, Steve C Budsberg
OBJECTIVE: To investigate the relationship between tibiofemoral kinematics before and after total knee replacement (TKR) in vitro. ANIMALS: Eight canine hemipelves. METHODS: A modified Oxford Knee Rig was used to place cadaveric limbs through a range of passive motion allowing the kinematics of the stifle to be evaluated. Four measurements were performed: a control stage, followed by a cranial cruciate transection stage, then following TKR with the musculature intact stage, and finally TKR with removal of limb musculature stage...
October 14, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/27733493/canadian-registry-of-implantable-electronic-device-outcomes-surveillance-of-the-riata-lead-under-advisory
#16
Ratika Parkash, Bernard Thibault, Iqwal Mangat, Benoit Coutu, Matthew Bennett, Jeffrey Healey, Atul Verma, Francois Philippon, Roopinder Sandhu, Douglas Cameron, Felix Ayala-Paredes, Laurence Sterns, Vidal Essebag, Teresa Kus, Pablo Nery, Elizabeth Stephenson, Raymond Yee, Derek Exner, Satish Toal, David Birnie, George Wells, Andrew Krahn
BACKGROUND: The Riata lead under advisory has posed a unique clinical scenario where inside-out abrasion results in externalization of conductor cables, with a higher risk of electrical failure. We developed a comprehensive registry to assist with clinical management of this lead. METHODS AND RESULTS: This Canadian registry reports the findings of 3763 (74.2% of all Riata leads in Canada) Riata leads under advisory, with a mean follow-up time of 8.9±1.5 years. The overall electrical failure rate was 5...
October 2016: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27720163/the-effect-of-intravenous-immunoglobulin-passive-immunotherapy-on-unexplained-recurrent-spontaneous-abortion-a-meta-analysis
#17
Si-Wei Wang, Song-Yang Zhong, Li-Jun Lou, Ze-Fu Hu, Hua-Yu Sun, Hai-Yan Zhu
The aim of this study was to investigate the effect of passive immunotherapy using intravenous immunoglobulin (IVIG) on unexplained recurrent spontaneous abortion (RSA). Live birth rates were analysed and binary data were calculated using risk ratio and 95% confidence interval. Meta-analysis of 11 studies showed that the difference in the live birth rate between the IVIG treatment and placebo groups was on the margin of significance (RR = 1.25, 95% CI 1.00 to 1.56, P = 0.05). Both cumulative and trial sequential meta-analyses indicated potential beneficial effect of IVIG but the evidence was inconclusive...
September 16, 2016: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/27688220/effects-of-kinesio-taping-compared-to-arterio-venous-impulse-system%C3%A2-on-limb-swelling-and-skin-temperature-after-total-knee-arthroplasty
#18
Christoph Windisch, Steffen Brodt, Eric Röhner, Georg Matziolis
PURPOSE: It is an established fact that post-operative (p.o.) soft-tissue swelling and lymphoedema after total knee arthroplasty (TKA) have a major influence on the p.o. early functional outcome. Kinesio taping has a proven clinical effect in increasing lymph drainage. Despite the decades of experience gained and the assumed positive effects, hardly any investigations have been conducted to date on the influence of Kinesio taping on the p.o. healing process after TKA. The objective of the present study was to test the hypothesis that Kinesio taping used as a lymph application leads to a reduction of p...
September 29, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27646800/ensuring-passivity-and-retrievability-for-immediate-complete-arch-implant-supported-prostheses
#19
Aloisio Oro Spazzin, Bernardo Camargo, Atais Bacchi
This technique describes the fabrication of frameworks for immediate complete-arch implant-supported prostheses to ensure that the dimensional alterations that occur during the casting procedure do not interfere with passivity. As sectioning and soldering are not necessary, there is no delay in the fabrication process, and the framework is not weakened. Titanium abutments for interim screw-retained prostheses are prepared on the definitive cast, and framework waxing preserves the access holes to the screws...
September 16, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27641300/performance-of-allogeneic-bioengineered-replacement-pulmonary-valves-in-rapidly-growing-young-lambs
#20
Rachael W Quinn, Arthur A Bert, Gabriel L Converse, Eric E Buse, Stephen L Hilbert, William B Drake, Richard A Hopkins
BACKGROUND: Cardiac allometric organ growth after pediatric valve replacement can lead to patient-prosthesis size mismatch and valve re-replacement, which could be mitigated with allogeneic decellularized pulmonary valves treated with collagen conditioning solutions to enhance biological and mechanical performance, termed "bioengineered valves." In this study, we evaluated functional, dimensional, and biological responses of these bioengineered valves compared with traditional cryopreserved valves implanted in lambs during rapid somatic growth...
October 2016: Journal of Thoracic and Cardiovascular Surgery
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