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https://www.readbyqxmd.com/read/28719787/in-vivo-performance-of-a-novel-anatomically-shaped-total-meniscal-prosthesis-made-of-polycarbonate-urethane-a-12-month-evaluation-in-goats
#1
Anne C T Vrancken, Gerjon Hannink, Wojciech Madej, Nico Verdonschot, Tony G van Tienen, Pieter Buma
BACKGROUND: Injury or loss of the meniscus generally leads to degenerative osteoarthritic changes in the knee joint. However, the treatment options for symptomatic patients with total meniscectomy are limited. Therefore, we developed a novel, anatomically shaped, total meniscal implant made of polycarbonate urethane. PURPOSE: To evaluate the in vivo performance of this novel total meniscal implant. The assessment particularly focused on the implant's response to long-term physiological loading in a goat model and its chondroprotective capacity in comparison to clinically relevant controls...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28719378/chemical-stability-of-morphine-ropivacaine-and-ziconotide-in-combination-for-intrathecal-analgesia
#2
Julien Robert, Jérémy Sorrieul, Elsa Rossignol, Hélène Beaussart, Hélène Kieffer, Caroline Folliard, Denis Dupoiron, Catherine Devys
Pain is the most feared symptom amongst individuals living with cancer. In 15% to 20% of patients, conventional analgesic therapy either fails to relieve pain or induces adverse effects. Intrathecal drug delivery systems may present an effective alternative for pain management. The Cancerology Center Paul Papin protocol includes an admixture of morphine, ropivacaine, and ziconotide in intrathecal preparations. These drugs are administered by a fully implantable or an external pump. Syringes or polyolefin infusion bags are prepared for refill just before use...
July 2017: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28717792/accelerated-fatigue-resistance-%C3%A2-of-novel-design-histoanatomic-%C3%A2-implant-restorations-made-of-%C3%A2-cad-cam-bilaminar-assemblies
#3
Ivan Molina, Jack Goldberg, Claudia Maziero Volpato, Pascal Magne
OBJECTIVES: Evaluate the fatigue resistance and failure mode of novel-design implant restorations made of histoanatomic computer-assisted design/computer-assisted manufacturing (CAD/CAM) bilaminar bonded assemblies. MATERIAL AND METHODS: 60 screw-retained implant restorations were fabricated. Monolithic restorations were used as a control group (15 lithium disilicate: group CE; and 15 nanofilled composite resin: group CL), and compared with bilaminar restorations (15 dentin-shaped lithium disilicate mesostructures with a bonded nanofilled composite resin veneer: group CEL; and 15 dentin-shaped nanofilled composite resin mesostructures with a bonded lithium disilicate veneer: group CLE)...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28714533/multicenter-retrospective-study-of-neurostimulation-with-exit-of-therapy-by-explant
#4
Jason E Pope, Timothy R Deer, Steven Falowski, David Provenzano, Michael Hanes, Salim M Hayek, Jacob Amrani, Jonathan Carlson, Ioannis Skaribas, Kris Parchuri, W Porter McRoberts, Robert Bolash, Nameer Haider, Maged Hamza, Kasra Amirdelfan, Sean Graham, Corey Hunter, Eric Lee, Sean Li, Michael Yang, Lucas Campos, Shrif Costandi, Robert Levy, Nagy Mekhail
INTRODUCTION: Spinal cord stimulation (SCS) devices are cost effective and improve function as well as quality of life. Despite the demonstrated benefits of SCS, some patients have the device explanted. We are interested in exploring the patient characteristics of those explanted. METHODS: This is a retrospective chart review of neurostimulation patients who underwent explantation at 18 centers across the United States within the previous five years. RESULTS: Data from 352 patients were collected and compiled...
July 17, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28714236/effectiveness-of-tissue-engineered-three-dimensional-bioactive-graft-on-bone-healing-and-regeneration-an-in-vivo-study-with-significant-clinical-value
#5
Mostafa Shahrezaie, Ali Moshiri, Babak Shekarchi, Ahmad Oryan, Nicola Maffulli, Javad Parvizi
Several strategies have been used to promote bone repair; with many failing due to the lack of osteoinduction. We describe our approach for promoting bone healing that attempts to overcome prior shortcomings. First, we compared the role of different concentrations of Gelatin (Gel), nanostructured-hydroxyapatite (nHA), Simvastatin (Sim) and nHA-Sim particles on healing of small femoral bone defects in rabbits. The effective concentration of each of them was studied, and then a three-dimensional porous scaffold was designed using Gel, nHA and Sim which was then cross-linked with Genipin...
July 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28711589/fixation-strength-of-a-polyetheretherketone-femoral-component-in-total-knee-arthroplasty
#6
Lennert de Ruiter, Dennis Janssen, Adam Briscoe, Nico Verdonschot
INTRODUCTION: Introducing polyetheretherketone (PEEK) polymer as a material for femoral components in total knee arthroplasty (TKA) could potentially lead to a reduction of the cemented fixation strength. A PEEK implant is more likely to deform under high loads, rendering geometrical locking features less effective. Fixation strength may be enhanced by adding more undercuts or specific surface treatments. The aim of this study is to measure the initial fixation strength and investigate the associated failure patterns of three different iterations of PEEK-OPTIMA(®) implants compared with a Cobalt-Chromium (CoCr) component...
July 12, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28711374/the-components-of-shoulder-and-elbow-movements-as-goals-of-primary-reconstructive-operation-in-obstetric-brachial-plexus-lesions
#7
Jerzy Luszawski, Wiesław Marcol, Marek Mandera
Most of the cases of obstetric brachial plexus lesions (OBPL) show satisfactory improvement with conservative management, but in about 25% some surgical treatment is indicated. The present paper analyzes the effects of primary reconstructive surgeries in aspect of achieving delineated intraoperatively goals. Children operated before the age of 18 months with follow-up period longer than 1 year were selected. Therapeutic goals established during the operation were identified by analysis of initial clinical status and operative protocols...
June 30, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28710652/comparison-between-inflammation-related-markers-in-peri-implant-crevicular-fluid-and-clinical-parameters-during-osseointegration-in-edentulous-jaws
#8
Amália M Bielemann, Raissa M Marcello-Machado, Fábio Renato Manzolli Leite, Frederico Canato Martinho, Otacílio Luiz Chagas-Júnior, Altair Antoninha Del Bel Cury, Fernanda Faot
OBJECTIVES: The aim of this study is to improve the understanding of interleukin mechanisms during osseointegration to enhance the monitoring of implant failure and success. Clinical parameters, implant stability, and cytokine levels in peri-implant crevicular fluid (PICF) during early bone healing after implant placement were investigated. MATERIAL AND METHODS: Sixty narrow implants were placed in mandible anterior region of 30 edentulous patients (67.23 ± 7...
July 14, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28710248/microrna-9-regulates-fetal-alcohol-induced-changes-in-d2-receptor-to-promote-prolactin-production
#9
Omkaram Gangisetty, Shaima Jabbar, Olivia Wynne, Dk K Sarkar
Fetal alcohol exposure (FAE) is known to increase prolactin (PRL) secretion from the pituitary lactotropes. In this study we determined whether microRNAs (miRs) are involved in FAE induced alteration in PRL release. We employed a rat animal model of FAE involving feeding pregnant Fisher 344 rats with a liquid diet containing 6.7% alcohol between gestational day 7 to 21 (AF). Both cyclic and estradiol implanted FAE females showed increased levels of plasma PRL and pituitary PRL mRNA but reduced levels of pituitary dopamine D2 receptor (D2R) and its short spliced form (D2S)...
July 14, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28709886/five-year-follow-up-results-of-a-prospective-multicenter-study-in-overactive-bladder-subjects-treated-with-sacral-neuromodulation
#10
Steven Siegel, Karen Noblett, Jeffrey Mangel, Jason Bennett, Tomas L Griebling, Suzette E Sutherland, Erin T Bird, Craig Comiter, Daniel Culkin, Samuel Zylstra, Fangyu Kan, Kellie Chase Berg
OBJECTIVE: To evaluate therapeutic success rate, changes in quality of life (QOL) and safety with sacral neuromodulation (SNM) at 5 years after InterStim™ implant. Subjects with bothersome symptoms of overactive bladder (OAB) including urinary urge incontinence (UI) and/or urgency-frequency (UF), who had failed at least 1 anticholinergic medication and had at least 1 medication untried were included. METHODS: Therapeutic success was defined as a UI or UF response: ≥ 50% improvement in average leaks or voids/day or a return to normal voiding (<8 voids/day)...
July 11, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28709835/the-antimicrobial-peptide-human-%C3%AE-defensin-1-potentiates-in-vitro-osteoclastogenesis-via-activation-of-the-p44-42-mitogen-activated-protein-kinases
#11
Anupong Makeudom, Chayarop Supanchart, Pattanin Montreekachon, Sakornrat Khongkhunthian, Thanapat Sastraruji, Julaporn Krisanaprakornkit, Suttichai Krisanaprakornkit
Previous studies have demonstrated increased expression and raised levels of human β-defensin (hBD)-1 in gingival tissue and crevicular fluid of patients with chronic periodontitis and peri-implantitis, oral bone-resorbing diseases caused by enhanced osteoclastogenesis. Therefore, we aimed to investigate the effect of hBD-1 on osteoclast formation and function and to elucidate the involved signaling pathway in vitro. Human peripheral blood mononuclear cells (PBMCs) were first incubated with various doses of hBD-1 and cell viability was assayed by MTT...
July 11, 2017: Peptides
https://www.readbyqxmd.com/read/28708922/assessment-of-long-term-survival-of-immediately-loaded-tilted-implants-supporting-a-maxillary-full-arch-fixed-prosthesis
#12
Tiziano Testori, Fabio Galli, Luca Fumagalli, Matteo Capelli, Francesco Zuffetti, Matteo Deflorian, Andrea Parenti, Massimo Del Fabbro
PURPOSE: To analyze the long-term outcome of fixed prostheses supported by six implants, two of which were tilted, placed in the maxilla and immediately loaded more than 10 years earlier. MATERIALS AND METHODS: A retrospective review of implants placed between May 29, 2003 and February 12, 2005 and used to support immediately loaded fixed dental prostheses in the maxilla was conducted. The features of failed implants were analyzed. In the most recent follow-up visits, survival of individual implants and prostheses was verified, and modified Plaque Index as well as modified Sulcular Bleeding Index were assessed...
July 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28708917/vertical-osseodistraction-with-a-new-intraosseous-alveolar-distractor-prototype-for-dental-implant-rehabilitation-a-pilot-study-in-dogs
#13
Marco Esposito, Anna Trullenque-Eriksson, Carlos Navarro Vila, Miguel Peñarrocha, Abel García, Arturo Sánchez, Fernando Muñoz-Guzón, José Manuel Martínez Martín
PURPOSE: To evaluate in dogs a newly developed intraosseous alveolar distractor (Mozo-Grau Alveolar Distractor) for vertical bone augmentation to allow placement of dental implants. MATERIALS AND METHODS: Four dogs had their posterior teeth removed, and sockets were left to heal for 20 weeks. The right and left sides of the posterior mandibles were randomly allocated, according to a split-mouth design, to receive either two distractors, distracting a 32-mm-long bone segment, or two distractors supporting one bony segment 20 mm long and one 8 mm long...
July 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28708911/peri-implant-and-paracrestal-inflammatory-biomarkers-at-failing-versus-surviving-implant-sites-in-a-beagle-dog-study
#14
Javier Montero, Fernando Aragón, Leticia A Blanco, Yasmina Guadilla, Begona García-Cenador, Antonio López-Valverde
PURPOSE: This study sought to quantify three biochemical mediators of inflammation (tumor necrosis factor alpha [TNF-α], superoxide anion [SOA], and myeloperoxidase [MPO]) by analyzing crestal (peri-implants) and paracrestal gingival biopsy samples obtained from an experimental study on beagle dogs treated with implants inserted immediately into fresh sockets with circumferential defects. MATERIALS AND METHODS: In 10 beagle dogs, 4 roughened titanium implants (3...
July 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28708201/the-impact-of-trabecular-metal-on-hip-centre-of-rotation-in-revision-and-complex-primary-hip-arthroplasty-a-radiological-review
#15
Carl O'Brien, Cillian J Keogh, Ailish Hannigan, Stephen Brennan, Cian Kennedy, Rehan Gul, James A Harty
INTRODUCTION: Total hip arthroplasty (THA) is a very successful procedure. Revision THA is becoming increasingly common. Recent developments to improve outcomes include the development of large trabecular metal (TM) acetabular cups and augments. There is a paucity of data on the benefit of these new techniques. METHODS: A single-centre retrospective review consisting of a radiological review of post-op revision THA anteroposterior pelvis. Data collection was performed using the Irish National Orthopaedic Register (INOR) and from a previous project...
July 1, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28706796/arthroscopic-removal-of-a-loose-polyethylene-glenoid-component-with-bone-grafting-and-patch-augmentation-for-glenoid-osseous-defect
#16
Jeffrey T Abildgaard, Jared C Bentley, Richard J Hawkins, John M Tokish
Glenoid component loosening is a common cause of failed total shoulder arthroplasty. Many different treatment options exist for the management of a symptomatic loose polyethylene glenoid component, ranging from component removal to revision arthroplasty. Arthroscopic removal and conversion to hemiarthroplasty provides a minimally invasive management option that avoids takedown of the subscapularis and allows for humeral prosthesis retention. Frequently, however, osteolysis is encountered concomitantly leading to cavitary glenoid bone deficits at the time of glenoid implant removal, limiting both immediate and future treatment options...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28705321/implantable-hemodynamic-monitoring-for%C3%A2-heart-failure-patients
#17
REVIEW
William T Abraham, Leor Perl
Rates of heart failure hospitalization remain unacceptably high. Such hospitalizations are associated with substantial patient, caregiver, and economic costs. Randomized controlled trials of noninvasive telemedical systems have failed to demonstrate reduced rates of hospitalization. The failure of these technologies may be due to the limitations of the signals measured. Intracardiac and pulmonary artery pressure-guided management has become a focus of hospitalization reduction in heart failure. Early studies using implantable hemodynamic monitors demonstrated the potential of pressure-based heart failure management, whereas subsequent studies confirmed the clinical utility of this approach...
July 18, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28699147/what-are-the-complications-survival-and-outcomes-after-revision-to-reverse-shoulder-arthroplasty-in-patients-older-than-80-years
#18
Eduard Alentorn-Geli, Nicholas J Clark, Andrew T Assenmacher, Brian T Samuelsen, Joaquín Sánchez-Sotelo, Robert H Cofield, John W Sperling
BACKGROUND: By the time patients with a failed shoulder arthroplasty require revision surgery, a substantial number are older than 80 years. The risk of complications of revision arthroplasty in this elderly population is largely unknown and needs to be considered when contemplating whether these patients are too frail for revision surgery. QUESTIONS/PURPOSES: (1) What are the 90-day medical and surgical complications after revision to reverse shoulder arthroplasty (RSA) in patients older than 80 years? (2) What are the 2- and 5-year survival rates after revision? (3) Was there an improvement in pain at rest or with activity, range of motion (ROM), and strength after revision surgery? METHODS: Between 2004 and 2013, 38 patients who were older than 80 years (84 ± 3 years) underwent revision surgery to a RSA...
July 11, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28698624/naringenin-impairs-two-pore-channel-2-activity-and-inhibits-vegf-induced-angiogenesis
#19
Irene Pafumi, Margherita Festa, Francesca Papacci, Laura Lagostena, Cristina Giunta, Vijay Gutla, Laura Cornara, Annarita Favia, Fioretta Palombi, Franco Gambale, Antonio Filippini, Armando Carpaneto
Our research introduces the natural flavonoid naringenin as a novel inhibitor of an emerging class of intracellular channels, Two-Pore Channel 2 (TPC2), as shown by electrophysiological evidence in a heterologous system, i.e. Arabidopsis vacuoles lacking endogenous TPCs. In view of the control exerted by TPC2 on intracellular calcium signaling, we demonstrated that naringenin dampens intracellular calcium responses of human endothelial cells stimulated with VEGF, histamine or NAADP-AM, but not with ATP or Angiopoietin-1 (negative controls)...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28697082/primary-posterior-blade-plate-tibiotalar-arthrodesis-a-salvage-procedure-for-complex-nonreconstructable-pilon-fractures
#20
Ermias Abebe, Dana J Farrell, Boris Zelle, Gary Gruen
A subset of C2/C3 pilon fractures, open pilon injuries, metaphyseal bone comminution, and those involving substantial soft tissue or vascular injury may be nonreconstructable. Such injuries are at risk of progress to nonunion and failing open reduction internal fixation (ORIF). The risk of infection, malunion, and nonunion is relatively high with such injury patterns. In such cases, tibiotalar arthrodesis is performed after ORIF fails as a salvage procedure. Overall, the literature agrees that all pilon fractures will develop posttraumatic osteoarthritis, and these patients are ultimately treated with an arthrodesis or in narrow population with total ankle arthroplasty...
August 2017: Journal of Orthopaedic Trauma
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