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https://www.readbyqxmd.com/read/29778965/metal-hypersensitivity-in-the-context-of-connective-tissue-disease-an-opportunity-for-practice-prevention
#1
Jack Ρ Guccione, Sharon E Jacob
Metal hypersensitivity reactions (MHR) are not associated with metal containing orthodontic implants unless there is a positive history of dermatitis from a high nickel-release item (piercing post, earring, watch). We wish to present this letter to highlight evidence surrounding orthodontic-related nickel hypersensitivity and to bring to the readers attention current American Contact Dermatitis Society (ACDS) guidelines that endorse the importance of addressing metal hypersensitivity reactions in the setting of implantable dental devices...
May 17, 2018: Environmental Research
https://www.readbyqxmd.com/read/29778509/longitudinal-observations-using-simultaneous-fmri-multiple-channel-electrophysiology-recording-and-chemical-microiontophoresis-in-the-rat-brain
#2
Saul Jaime, Jose E Cavazos, Yihong Yang, Hanbing Lu
BACKGROUND: fMRI blood oxygenation level-dependent (BOLD) signal has been widely used as a surrogate for neural activity. However, interpreting differences in BOLD fMRI based on underlying neuronal activity remains a challenge. Concurrent rsMRI data collection and electrophysiological recording in combination with microiontophoretically injected modulatory chemicals allows for improved understanding of the relationship between resting state BOLD and neuronal activity. NEW METHODS: Simultaneous fMRI, multi-channel intracortical electrophysiology and focal pharmacological manipulation data to be acquired longitudinally in rats for up to 2 months...
May 17, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29777149/stretching-reduces-tumor-growth-in-a-mouse-breast-cancer-model
#3
L Berrueta, J Bergholz, D Munoz, I Muskaj, G J Badger, A Shukla, H J Kim, J J Zhao, H M Langevin
There is growing interest in developing non-pharmacological treatments that could boost natural defenses against cancer and contribute to primary and secondary cancer prevention. Recent studies have shown that gentle daily stretching for 10 minutes can reduce local connective tissue inflammation and fibrosis. Because mechanical factors within the stroma can influence the tumor microenvironment, we hypothesized that stretching would reduce the growth of tumors implanted within locally stretched tissues and tested this hypothesis in a mouse orthotopic breast cancer model...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29774206/emphysema-following-air-powder-abrasive-treatment-for-peri-implantitis
#4
Sung-Tak Lee, Malavika Geetha Subu, Tae-Geon Kwon
Background: Subcutaneous emphysema refers to swelling caused by the presence of air or gas in the interstices of loose connective tissue. In the head and neck area, it may follow the fascial planes and is characterized by sudden swelling, crepitus on palpation, infrequent pain, and air emboli on radiography. It usually occurs as a complication in dental treatment. Some reports have described subcutaneous emphysema caused by dental procedures; however, severe emphysema related to peri-implantitis after treatment has not been documented...
December 2018: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29770239/comparison-of-marginal-bone-loss-between-internal-and-external-connection-dental-implants-in-posterior-areas-without-periodontal-or-peri-implant-disease
#5
Dae-Hyun Kim, Hyun Ju Kim, Sungtae Kim, Ki-Tae Koo, Tae-Il Kim, Yang-Jo Seol, Yong-Moo Lee, Young Ku, In-Chul Rhyu
Purpose: The purpose of this retrospective study with 4-12 years of follow-up was to compare the marginal bone loss (MBL) between external-connection (EC) and internal-connection (IC) dental implants in posterior areas without periodontal or peri-implant disease on the adjacent teeth or implants. Additional factors influencing MBL were also evaluated. Methods: This retrospective study was performed using dental records and radiographic data obtained from patients who had undergone dental implant treatment in the posterior area from March 2006 to March 2007...
April 2018: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29767434/regenerative-surgical-therapy-for-peri-implantitis-using-deproteinized-bovine-bone-mineral-with-10-collagen-enamel-matrix-derivative-and-doxycycline-a-prospective-3-year-cohort-study
#6
Faustino Mercado, Stephen Hamlet, Saso Ivanovski
OBJECTIVES: There is limited evidence regarding the long-term efficacy of regenerative treatment for peri-implantitis. The aim of this study was to evaluate a combination therapy of deproteinized bovine bone mineral with 10% collagen (DBBMC), enamel matrix derivative (EMD) and Doxycycline in the regeneration of bone defects associated with peri-implantitis. METHODS: Thirty patients diagnosed with peri-implantitis (BoP/suppuration, probing depth greater than 4 mm, minimum radiographic bone loss of 20%, at least 2 years in function) were enrolled in the study...
May 16, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29763505/influence-of-alveolar-bone-defects-on-the-stress-distribution-in-quad-zygomatic-implant-supported-maxillary-prosthesis
#7
Yuanyuan Duan, Ravi Chandran, Denise Cherry
PURPOSE: The purpose of this study was to create three-dimensional composite models of quad zygomatic implant-supported maxillary prostheses with a variety of alveolar bone defects around implant sites, and to investigate the stress distribution in the surrounding bone using the finite element analysis (FEA) method. MATERIALS AND METHODS: Three-dimensional models of titanium zygomatic implants, maxillary prostheses, and human skulls were created and assembled using Mimics based on microcomputed tomography and cone beam computed tomography images...
May 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29763496/comparison-of-marginal-bone-loss-between-implants-with-internal-and-external-connections-a-systematic-review
#8
Natalia Palacios-Garzón, Elisabeth Mauri-Obradors, Xavier Roselló-LLabrés, Albert Estrugo-Devesa, Enric Jané-Salas, José López-López
PURPOSE: The objective of this systematic review was to compare the loss of marginal bone between implants with internal and external connections by analyzing results reported in studies published after 2010. MATERIALS AND METHODS: A literature search in MEDLINE with the keywords "dental implant connections, external internal implant connection, bone loss implant designs, internal and external connection implant studies in humans" was conducted. Clinical trials on human beings, comparing both connections and published in English, from 2010 to 2016 were selected...
May 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29763343/clinical-and-patient-related-outcomes-of-a-tapered-implant-system-with-switched-platform-conical-abutments-a-private-practice-field-trial
#9
Jacob Horwitz, Eli E Machtei, Shai Frankental, Eran Gabay, Yaniv Mayer, Livia Joseph, Omer Cohen
The aim of this prospective cohort observational field trial was to examine 1-year survival and success rates of a recently introduced tapered implant system with switched platform conical abutments and to evaluate patient related outcomes of therapy. Partially edentulous patients aged between 18-75, with available bone height for dental implants ≥ 10mm mm. desiring to restore the missing tooth/teeth with implant supported restoration, were recruited by seven periodontists in their respective private practices...
May 15, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29761902/the-influence-of-implant-abutment-connection-to-peri-implant-bone-loss-a-systematic-review-and-meta-analysis
#10
REVIEW
Riccardo Caricasulo, Luciano Malchiodi, Paolo Ghensi, Giuliano Fantozzi, Alessandro Cucchi
PURPOSE: Different implant-abutment connections are available and it has been claimed they could have an effect on marginal bone loss. The aim of this review is to establish if implant connection configuration influences peri-implant bone loss (PBL) after functional loading. METHODS: A specific question was formulated according to the Population, Intervention, Control, and Outcome (PICO): Does the type of implant-abutment connection (external, internal, or conical) have an influence on peri-implant bone loss? A PubMed/MEDLINE electronic search was conducted to identify English language publications published in international journals during the last decade (from 2006 to 2016)...
May 15, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29758585/comparative-study-about-the-tensile-strength-and-yielding-mechanism-of-pacing-lead-among-major-manufacturers
#11
Chan Chi-Wo, Chan Lip-Kiong, Lam Tongny, Tsang Kin-Keung, Chan Kin-Wing
BACKGROUND: With extraction of cardiovascular implantable electronic devices (CIED) increasingly necessitated, various studies have contemplated to investigate clinical predictors for its success and complications. Intrinsic parameters of CIED leads have been studied less extensively and are the foci of this study. METHODS: Three major pacemaker manufacturers accepted invitation. Leads then underwent tensile test in-vitro with their composite tensile strength (TS) compared...
May 14, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29756213/the-influence-of-different-soft-tissue-grafting-procedures-at-single-implant-placement-on-esthetics-a-randomized-controlled-trial
#12
Elise G Zuiderveld, Henny J A Meijer, Arjan Vissink, Gerry M Raghoebar
BACKGROUND: Soft tissue grafting to thicken the soft tissue around dental implants was proposed to ameliorate the esthetic outcome. Traditionally, connective tissue is used as a grafting material, but a xenogeneic collagen matrix was introduced as an alternative to reduce patient morbidity. METHODS: Sixty patients randomly received either no graft (n = 20, NG group), a connective tissue graft (n = 20, CTG group) or a xenogeneic collagen matrix (n = 20, XCM group) when placing an implant in a preserved alveolar ridge...
May 13, 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29750405/heartmate-3-implantation-via-left-antero-lateral-thoracotomy-to-avoid-resternotomy-in-high-risk-patients
#13
Raymond Pfister, Piergiorgio Tozzi, Roger Hullin, Patrick Yerly, Fritz-Patrick Jahns, René Prêtre, Matthias Kirsch
Left ventricular assist devices (LVADs) are currently the best alternative to cardiac transplantation for patients with end-stage heart failure (HF) as a bridge to transplant or to decision, or as destination therapy. Full median sternotomy or minimally invasive techniques are the more standard approaches used at present.  LVADs are usually implanted between the left ventricle apex and the ascending aorta. An implantation through a left thoracotomy with an outflow graft connected to the descending aorta is much less performed nowadays due to the longer times to extubation, higher incidence of postoperative pain, and poorer hemodynamics in the ascending aorta, which may lead to thrombosis...
April 25, 2018: Multimedia Manual of Cardiothoracic Surgery: MMCTS
https://www.readbyqxmd.com/read/29748188/factors-influencing-the-decision-to-proceed-to-firmware-upgrades-to-implanted-pacemakers-for-cybersecurity-risk-mitigation
#14
Leslie A Saxon, Niraj Varma, Laurence M Epstein, Leonard I Ganz, Andrew E Epstein
In August 2017, the first major recall for cybersecurity vulnerabilities in pacemakers capable of remote connectivity was released that impacted 465,000 United States patients.1,2 The FDA approved a firmware update designed by the manufacturer of the devices as a remediation (Abbott , formally St. Jude Medical). The recall was in response to the public disclosure of vulnerability by an investment firm and produced in a lab environment that could allow an unauthorized party in close proximity to a patient to impact the performance of the device or modify device settings via radio frequency communication...
May 10, 2018: Circulation
https://www.readbyqxmd.com/read/29744210/a-strain-gauge-analysis-comparing-4-unit-veneered-zirconium-dioxide-implant-borne-fixed-dental-prosthesis-on-engaging-and-non-engaging-abutments-before-and-after-torque-application
#15
Alyssa Epprecht, Marco Zeltner, Goran Benic, Mutlu Özcan
This study quantified the strain development after inserting implant-borne fixed dental prosthesis (FDP) to various implant-abutment joints. Two bone-level implants (∅ = 4.1 mm, RC, SLA 10 mm, Ti, Straumann) were inserted in polyurethane models (N = 3) in the area of tooth nos 44 and 47. Four-unit veneered zirconium dioxide FDPs (n = 2) were fabricated, one of which was fixed on engaging (E; RC Variobase, ∅ = 4.5 mm, H = 3.5 mm) and the other on non-engaging (NE) abutments (RC Variobase, ∅ = 4...
February 2018: Clinical and Experimental Dental Research
https://www.readbyqxmd.com/read/29742979/electrical-stimulation-of-the-lower-esophageal-sphincter-to-treat-gastroesophageal-reflux-after-poem
#16
Erwin Rieder, Matthias Paireder, Ivan Kristo, Katrin Schwameis, Sebastian F Schoppmann
As per-oral endoscopic myotomy (POEM) is not followed by any anti-reflux procedure, a common concern is the risk of postoperative gastro-esophageal reflux disease (GERD). Electrical stimulation of the lower esophageal sphincter (LES-EST) could be an option for post-POEM GERD. A 68-year old male obese patient underwent successful POEM but developed GERD not responsive to proton pump inhibitors. Consecutively, the patient had implanted an electrical LES stimulation device, consisting of bipolar LES-electrodes connected to a subcutaneous pulse generator...
May 1, 2018: Surgical Innovation
https://www.readbyqxmd.com/read/29742946/comparative-analysis-of-osseointegration-in-various-types-of-acetabular-implant-materials
#17
Stanislav Bondarenko, Ninel Dedukh, Volodymyr Filipenko, Mandus Akonjom, Ahmed Amine Badnaoui, Ran Schwarzkopf
BACKGROUND: There is a lack of comparative data on osseointegration (BIC) of acetabular cup surfaces in hip arthroplasty in both normal bone mineral density and in conditions of osteoporosis. AIM: To compare osseointegration of acetabular implants with various types of surfaces in an animal model with normal and osteoporotic bone tissue. MATERIAL AND METHODS: The study was performed on 60 rats. To simulate osteoporosis ovariectomy was performed in 30 animals...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29742350/fast-degradable-polycaprolactone-for-drug-delivery
#18
Seo Hee Chang, Hyun Jung Lee, Sohee Park, Yelin Kim, Byeongmoon Jeong
Polycaprolactone (PCL) was reported a long time ago; however, its biomedical applications has not been extensively investigated in comparison with poly(lactide-co-glycolide) (PLGA) due to its too slow degradation profile. Here, we are reporting an oxalate-connected oligocaprolactone multiblock copolymer (PCL-OX) as a fast degradable PCL while maintaining its crystalline properties and low melting point of PCL. The in-vivo application of the paclitaxel-loaded PCL-OX microspheres provided a steady plasma drug concentration of 6-9 μg/ml over 28 days, similar to that of the PLGA microspheres...
May 9, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29739624/fracture-loads-and-failure-modes-of-customized-and-non-customized-zirconia-abutments
#19
Izabela Cristina Maurício Moris, Yung-Chung Chen, Adriana Cláudia Lapria Faria, Ricardo Faria Ribeiro, Alex Sui-Lun Fok, Renata Cristina Silveira Rodrigues
OBJECTIVE: This study aimed to evaluate the fracture load and pattern of customized and non-customized zirconia abutments with Morse-taper connection. METHODS: 18 implants were divided into 3 groups according to the abutments used: Zr - with non-customized zirconia abutments; Zrc - with customized zirconia abutments; and Ti - with titanium abutments. To test their load capacity, a universal test machine with a 500-kgf load cell and a 0.5-mm/min speed were used. After, one implant-abutment assembly from each group was analyzed by Scanning Electron Microscopy (SEM)...
May 5, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29738717/the-habenula-in-neurosurgery-for-depression-a-convergence-of-functional-neuroanatomy-psychiatry-and-imaging
#20
REVIEW
Georgios P Skandalakis, Christos Koutsarnakis, Aristotelis V Kalyvas, Panagiotis Skandalakis, Elizabeth O Johnson, George Stranjalis
BACKGROUND: The habenula is a small, mostly underrated structure in the pineal region. Multidisciplinary findings demonstrate an underlying complex connectivity of the habenula with the rest of the brain, subserving its major role in normal behavior and the pathophysiology of depression. These findings suggest the potential application of "habenular psychosurgery" in the treatment of mental disorders. OBJECTIVE/HYPOTHESIS: The remission of two patients with treatment-resistant major depression treated with deep brain stimulation of the habenula supported the hypothesis that the habenula is an effective target for deep brain stimulation and initiated a surge of basic science research...
May 5, 2018: Brain Research
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