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Cementation

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https://www.readbyqxmd.com/read/28822581/favorable-residual-stress-induction-by-resin-cementation-on-dental-porcelain
#1
Garry J P Fleming, Xu Cao, Dan L Romanyk, Owen Addison
OBJECTIVES: Despite developments in polycrystalline ceramics, glassy dental-ceramic materials provide the optimum cosmetic option in most clinical situations to mimic the natural dentition. The clinical success of glassy dental-ceramic materials is often attributed to resin-adhesive bonding techniques. In this study we explore whether shrinkage stresses generated on photo-polymerisation of the resin-cement are sufficient to induce ceramic surface defect stabilization, and we quantify the transient nature of the induced stresses...
August 16, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28822566/human-pulp-responses-to-partial-pulpotomy-treatment-with-theracal-as-compared-with-biodentine-and-proroot-mta-a-clinical-trial
#2
Hengameh Bakhtiar, Mohammad Hossein Nekoofar, Pouyan Aminishakib, Fatemeh Abedi, Fereshteh Naghi Moosavi, Ehsan Esnaashari, Arash Azizi, Samar Esmailian, Mohammad Reza Ellini, Vahid Mesgarzadeh, Mehdi Sezavar, Imad About
INTRODUCTION: Questions exist regarding the efficacy of resin-containing materials such as TheraCal directly applied on the pulp. This study sought to investigate the clinical efficacy of TheraCal as compared with Biodentine and ProRoot mineral trioxide aggregate (MTA) for partial pulpotomy. METHODS: In this clinical trial, partial pulpotomy was performed for 27 sound human maxillary and mandibular third molars scheduled for extraction. The teeth were randomly divided into 3 groups (n = 9) and underwent partial pulpotomy with TheraCal, Biodentine, and ProRoot MTA...
August 16, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28821988/presentation-and-management-of-symptomatic-central-bone-cement-embolization
#3
Ahmed Samir Barakat, Tamer Owais, Mohamed Alhashash, Mootaz Shousha, Hesham El Saghir, Bernward Lauer, Heinrich Boehm
BACKGROUND CONTEXT: With more cement augmentation procedures done, the occurrence of serious complications is also expected to rise. Symptomatic central cement embolization is a rare but very serious complication. Moreover, the pathophysiology and treatment of intrathoracic cement embolism remain controversial. PURPOSE: In this case series, we are trying to identify various presentations and suggest our emergent management scheme for symptomatic central cement embolization...
August 18, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28821055/improvement-of-silicate-cement-properties-with-bacterial-cellulose-powder-addition-for-applications-in-dentistry
#4
Georgeta Voicu, Sorin-Ion Jinga, Bogdan-Gabriel Drosu, Cristina Busuioc
The goal of this paper was to synthesize a new family of composites starting from mineral binder powders and biocellulose membranes, with applications in endodontics. An important achievement consisted in the crushing of biocellulose 3D structure in a polygranular powder via an hydrothermal treatment. Afterwards, the polymer powder was mixed with silicate cement powders synthesized through the sol-gel technique. The resulting hybrid materials were investigated by thermal analysis, X-ray diffraction, scanning electron microscopy and mechanical measurements...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820722/house-structure-is-associated-with-plasmodium-falciparum-infection-in-a-low-transmission-setting-in-southern-zambia
#5
Matthew M Ippolito, Kelly M Searle, Harry Hamapumbu, Timothy M Shields, Jennifer C Stevenson, Philip E Thuma, William J Moss, For The Southern Africa International Center Of Excellence For Malaria Research
House structure may influence the risk of malaria by affecting mosquito entry and indoor resting. Identification of construction features associated with protective benefits could inform vector control approaches, even in low-transmission settings. We examined the association between house structure and malaria prevalence in a cross-sectional analysis of 2,788 children and adults residing in 866 houses in a low-transmission area of Southern Province, Zambia, over the period 2008-2012. Houses were categorized according to wall (brick/cement block or mud/grass) and roof (metal or grass) material...
August 7, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28819613/aseptic-loosening-after-total-hip-arthroplasty-in-an-acromegalic-patient-a-case-report
#6
Simon Koulischer, Bilal Kapanci, Nicolas Bloemers, Tatiana Charles, Marc Jayankura
INTRODUCTION: Acromegaly is a rare disorder characterized by excess secretion of growth hormone and its principle mediator, insulin-like growth factor-1. Although acromegaly is frequently associated with osteoarthritis, the outcome of arthroplasty in this population is not documented. CASE REPORT: We report here a case of aseptic loosening of an uncemented total hip arthroplasty acetabulum in an acromegalic patient that was revised with a cemented cup. It has been suggested that the incidence of this complication is increased in other pathology with a similarly high bone-turnover (e...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28819572/a-cad-cam-zirconium-bar-as-a-bonded-mandibular-fixed-retainer-a-novel-approach-with-two-year-follow-up
#7
Maen Zreaqat, Rozita Hassan, Abdul Fatah Hanoun
Stainless steel alloys containing 8% to 12% nickel and 17% to 22% chromium are generally used in orthodontic appliances. A major concern has been the performance of alloys in the environment in which they are intended to function in the oral cavity. Biodegradation and metal release increase the risk of hypersensitivity and cytotoxicity. This case report describes for the first time a CAD/CAM zirconium bar as a bonded mandibular fixed retainer with 2-year follow-up in a patient who is subjected to long-term treatment with fixed orthodontic appliance and suspected to have metal hypersensitivity as shown by the considerable increase of nickel and chromium concentrations in a sample of patient's unstimulated saliva...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28819098/protection-and-consolidation-of-stone-heritage-by-self-inoculation-with-indigenous-carbonatogenic-bacterial-communities
#8
Fadwa Jroundi, Mara Schiro, Encarnación Ruiz-Agudo, Kerstin Elert, Inés Martín-Sánchez, María Teresa González-Muñoz, Carlos Rodriguez-Navarro
Enhanced salt weathering resulting from global warming and increasing environmental pollution is endangering the survival of stone monuments and artworks. To mitigate the effects of these deleterious processes, numerous conservation treatments have been applied that, however, show limited efficacy. Here we present a novel, environmentally friendly, bacterial self-inoculation approach for the conservation of stone, based on the isolation of an indigenous community of carbonatogenic bacteria from salt damaged stone, followed by their culture and re-application back onto the same stone...
August 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28817742/minimum-abutment-height-to-eliminate-bone-loss-influence-of-implant-neck-design-and-platform-switching
#9
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/28817114/trauma-informed-care-in-the-newborn-intensive-care-unit-promoting-safety-security-and-connectedness
#10
M R Sanders, S L Hall
Both babies and their parents may experience a stay in the newborn intensive care unit (NICU) as a traumatic or a 'toxic stress,' which can lead to dysregulation of the hypothalamic-pituitary-adrenal axis and ultimately to poorly controlled cortisol secretion. Toxic stresses in childhood or adverse childhood experiences (ACEs) are strongly linked to poor health outcomes across the lifespan and trauma-informed care is an approach to caregiving based on the recognition of this relationship. Practitioners of trauma-informed care seek to understand clients' or patients' behaviors in light of previous traumas they have experienced, including ACEs...
August 17, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28817091/production-of-synthetic-phosphoanhydrite-and-its-use-as-a-binder-in-self-leveling-underlayments-slu
#11
Cecília Ogliari Schaefer, Malik Cheriaf, Janaíde Cavalcante Rocha
An experimental study was conducted to investigate the potential use of phosphogypsum (PG) to produce self-leveling underlayments. The study was designed in two stages. Initially a phosphoanhydrite (PA) was produced by heating phosphogypsum at temperatures of 350 °C, 450 °C, 550 °C, and 650 °C. Two periods of heating were applied (2 and 4 h). The formation of anhydrite was determined by thermogravimetric analysis (DTA-TG) and confirmed by X-ray diffraction (XRD). The results show that anhydrite II was obtained at temperatures above 450 °C, and at higher calcination temperatures the PA solubility was lower...
August 17, 2017: Materials
https://www.readbyqxmd.com/read/28816892/use-of-a-tourniquet-in-total-knee-arthroplasty-causes-a-paradoxical-increase-in-total-blood-loss
#12
Timothy Schnettler, Natalie Papillon, Harold Rees
BACKGROUND: A tourniquet in total knee arthroplasty has been used in an attempt to decrease perioperative blood loss; however, questions exist regarding safety and efficacy. Tranexamic acid has also been used to decrease blood loss by stabilizing clot formation. Because of these concerns, routine tourniquet use for total knee arthroplasty was discontinued by the senior author and routine tranexamic acid administration was commenced. The purpose of this study was to examine total perioperative blood loss with tourniquet use, with tourniquet use and routine use of tranexamic acid, and with tranexamic acid use alone without tourniquet...
August 16, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28816876/osteoporotic-thoracolumbar-fractures-how-are-they-different-classification-and-treatment-algorithm
#13
Shanmuganathan Rajasekaran, Rishi M Kanna, Klaus J Schnake, Alexander R Vaccaro, Gregory D Schroeder, Said Sadiqi, Cumhur Oner
Osteoporotic vertebral fractures constitute at least 50% of the osteoporotic fractures that happen worldwide. Occurrence of osteoporotic fractures make the elderly patient susceptible for further fractures and increases the morbidity due to kyphosis and pain; the mortality risk is also increased in these patients. Most fractures occur in the thoracic and thoracolumbar region and are often stable. Different descriptive and prognostic classification systems have been described, but none are universally accepted...
September 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28816187/comparison-of-film-thickness-of-two-commercial-brands-of-glass-lonomer-cement-and-one-dual-cured-composite-an-in-vitro-study
#14
Rajat R Khajuria, Rishav Singh, Pranamee Barua, Nausheen Hajira, Naveen Gupta, Rohit R Thakkar
AIM: The present study is undertaken to examine the film thickness of three most commonly used luting cements and to determine their usage as a luting agent. MATERIALS AND METHODS: This study was carried out strictly according to the guidelines of American Dental Association (ADS) specification no. 8. Two glass slabs of 5 cm in length and 2 cm in width were used. One glass slab was kept over the other glass slab and the space between the two glass slabs was measured using metallurgical microscope at the power of 10*...
August 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28815159/short-posterior-stabilization-in-combination-with-cement-augmentation-for-the-treatment-of-thoracolumbar-fractures-and-the-effects-of-implant-removal
#15
Sven Hoppe, Emin Aghayev, Sufian Ahmad, Marius Johann Baptist Keel, Timo Michael Ecker, Moritz Deml, Lorin Michael Benneker
STUDY DESIGN: Retrospective case series. OBJECTIVE: Short posterior stabilization with vertebroplasty is one treatment option for thoracolumbar burst fractures (AO A3). Whether it avoids progression in segmental kyphosis, especially after implant removal, is unclear. In a retrospective case-control study, its stability and the effect on intervertebral discs with and without implant removal was studied. METHODS: Fifty-nine consecutive patients were treated with bisegmental short posterior instrumentation and additional vertebroplasty of the fractured vertebra...
June 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28812178/sludge-quantification-at-water-treatment-plant-and-its-management-scenario
#16
Tarique Ahmad, Kafeel Ahmad, Mehtab Alam
Large volume of sludge is generated at the water treatment plants during the purification of surface water for potable supplies. Handling and disposal of sludge require careful attention from civic bodies, plant operators, and environmentalists. Quantification of the sludge produced at the treatment plants is important to develop suitable management strategies for its economical and environment friendly disposal. Present study deals with the quantification of sludge using empirical relation between turbidity, suspended solids, and coagulant dosing...
August 15, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28811793/effectiveness-and-safety-of-percutaneous-vertebroplasty-in-the-treatment-of-spinal-metastatic-tumor
#17
Yilin Liu, Yuqiang Wang, Liang Zhao, Ruipeng Song, Hongyu Tan, Limin Wang
OBJECTIVE: To evaluate the effectiveness, safety and feasibility of percutaneous vertebroplasty in the treatment of spinal metastatic tumor. METHODS: Thirty-four patients with spinal metastatic tumor who received treatment in the First Affiliated Hospital of Zhengzhou University from May 2014 to June 2015 were selected. Totally fifty diseased vertebrae were treated by percutaneous vertebroplasty. The curative effects were evaluated according to visual analogue scale (VAS) score, Oswestry Dability Index (ODI) and dose of pain reliever...
May 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28811588/dynamics-of-nano-confined-water-in-portland-cement-comparison-with-synthetic-c-s-h-gel-and-other-silicate-materials
#18
Guido Goracci, Manuel Monasterio, Helen Jansson, Silvina Cerveny
The dynamics of water confined in cement materials is still a matter of debate in spite of the fact that water has a major influence on properties such as durability and performance. In this study, we have investigated the dynamics of water confined in Portland cement (OPC) at different curing ages (3 weeks and 4 years after preparation) and at three water-to-cement ratios (w/c, 0.3, 0.4 and 0.5). Using broadband dielectric spectroscopy, we distinguish four different dynamics due to water molecules confined in the pores of different sizes of cements...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811147/neutralization-of-cement-asbestos-waste-by-melting-in-an-arc-resistance-furnace
#19
Jerzy Witek, Robert Kusiorowski
The paper presents the results of research on asbestos waste disposal by the melting process. The tests were carried out in a laboratory arc-resistance electric furnace. The obtained results showed that the fibrous structure of asbestos contained in cement-asbestos waste was completely destroyed. This led to the formation of new mineral phases without dangerous properties. The melting test was conducted on raw cement-asbestos samples without any additives and with a content of mineral compounds, the aim of which was to support the melting process...
August 12, 2017: Waste Management
https://www.readbyqxmd.com/read/28811043/treatment-of-the-fixation-surface-improves-glenoid-prosthesis-longevity-in-vitro
#20
Sarah Junaid, Sanjay Sanghavi, Carolyn Anglin, Anthony Bull, Roger Emery, Andrew A Amis, Ulrich Hansen
Many commercial cemented glenoid components claim superior fixation designs and increased survivability. However, both research and clinical studies have shown conflicting results and it is unclear whether these design variations do improve loosening rates. Part of the difficulty in investigating fixation failure is the inability to directly observe the fixation interface, a problem addressed in this study by using a novel experimental set-up. Cyclic loading-displacement tests were carried out on 60 custom-made glenoid prostheses implanted into a bone substitute...
July 22, 2017: Journal of Biomechanics
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