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https://www.readbyqxmd.com/read/29054169/phalangeal-morphology-of-shanghuang-fossil-primates
#1
Daniel L Gebo, Marian Dagosto, Xijun Ni, K Christopher Beard
Here, we describe hundreds of isolated phalanges attributed to middle Eocene fossil primates from the Shanghuang fissure-fillings from southern Jiangsu Province, China. Extending knowledge based on previous descriptions of postcranial material from Shanghuang, this sample of primate finger and toe bones includes proximal phalanges, middle phalanges, and over three hundred nail-bearing distal phalanges. Most of the isolated proximal and middle phalanges fall within the range of small-bodied individuals, suggesting an allocation to the smaller haplorhine primates identified at Shanghuang, including eosimiids...
December 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/29054164/a-new-primate-assemblage-from-la-verrerie-de-roches-middle%C3%A2-eocene-switzerland
#2
Raef Minwer-Barakat, Judit Marigó, Damien Becker, Loïc Costeur
Primates reached a great abundance and diversity during the Eocene, favored by warm temperatures and by the development of dense forests throughout the Northern Hemisphere. Here we describe new primate material from La Verrerie de Roches, a Middle Eocene karstic infill situated in the Jura Region (Switzerland), consisting of more than 80 dental remains. The primate assemblage from La Verrerie de Roches includes five different taxa. The best represented primate is Necrolemur aff. anadoni, similar in size and overall morphology to Necrolemur anadoni but resembling in some features the younger species Necrolemur antiquus...
December 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/29054163/new-dental-and-postcranial-material-of-agerinia-smithorum-primates-adapiformes-from-the-type-locality-casa-retjo-1-early-eocene-iberian-peninsula
#3
Joan Femenias-Gual, Judit Marigó, Raef Minwer-Barakat, Salvador Moyà-Solà
New material attributed to Agerinia smithorum from Casa Retjo-1 (early Eocene, NE Iberian Peninsula), consisting of 13 isolated teeth and a fragment of calcaneus, is studied in this work. These fossils allow the first description of the calcaneus and the upper premolars for the genus Agerinia, as well as the first description of the P2 and M(2) for A. smithorum. The newly recovered lower teeth are virtually identical to the holotype of A. smithorum and are clearly distinguishable from the other species of Agerinia...
December 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/29048706/assessment-of-monomer-release-from-3-different-fissure-sealants
#4
K Görkem Ulu Güzel, Işıl Sönmez
BACKGROUND: Light-activated resin-based dental fissure sealants are the most widely accepted among clinicians. The objective of this study was to determine monomer release of 3 different light-curing fissure sealants in vitro: Control Seal (Voco, Germany), Fissurit FX (Voco, Germany) and R&D Series Fıssured Nova (Imicrly, Turkey). METHODS: Each material was polymerized with a curing light: Valo Cordless (Ultradent) LED in standard mode for 20 seconds (n = 27) and 40 seconds (n = 27) and in Xtra power mode (plasma arc) for 3 seconds (n = 27)...
October 18, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/29045789/nano-hydroxyapatite-stimulation-of-gene-expression-requires-fgf-receptor-phosphate-transporter-and-erk1-2-signaling
#5
Shin-Woo Ha, Jonathan Park, Mark M Habib, George R Beck
Hydroxyapatite (HAp) is critical to health both as the main structural material of the skeleton and storage material of calcium and phosphate. Nano-sized HAp (nHAp) is naturally produced by mineralizing cells during bone formation and remodeling and is the main constituent of the skeleton. As such, HAp is currently being investigated as a therapeutic biomaterial for orthopedic and dental purposes. Recent studies have suggested that extracellular nHAp can influence osteoblast lineage commitment and cell function through changes in gene expression, however the mechanisms remain to be elucidated...
October 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29042724/evaluation-of-bond-strength-between-grooved-titanium-alloy-implant-abutments-and-provisional-veneering-materials-after-surface-treatment-of-the-abutments-an-in-vitro-study
#6
Gowtham Venkat, Murugesan Krishnan, Suganya Srinivasan, Muthukumar Balasubramanian
INTRODUCTION: Titanium has become the material of choice with greater applications in dental implants. The success of the dental implant does not only depend on the integration of the implant to the bone but also on the function and longevity of the superstructure. The clinical condition that demands long-term interim prosthesis is challenging owing to the decreased bond between the abutment and the veneering material. Hence, various surface treatments are done on the abutments to increase the bond strength...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29042716/effectiveness-of-behavioral-vaccine-on-the-oral-health-of-children-in-komarapalayam-south-india-a-randomized-controlled-pilot-trial
#7
N Umamaheswari, Sharath Asokan, S Thangakumaran
BACKGROUND: Oral health education and promotion have emerged as a strong force against the traditional, dominant, and curative model of health practice. In pediatric dentistry, the utilization of an entertaining, easy to understand, and practical educational material is warranted. Behavioral vaccine is a simple, scientifically proven practice that is repeated to increase well-being. AIM: The aim of this study is to compare the effectiveness of conventional (instructional) dental hygiene program and "Good Behavior Game" (GBG) (contingency dental hygiene program - a behavioral vaccine) on the practice of oral hygiene among 5-7-year-old schoolchildren...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29042078/bioactivity-and-fluoride-release-of-strontium-and-fluoride-modified-biodentine
#8
Hazel O Simila, Natalia Karpukhina, Robert G Hill
Biodentine™ is a novel tricalcium silicate based material used both as a coronal dentine replacement and in pulp therapy. Its multiple use in sealing perforations, pulp capping and as a temporary restoration arises from its ability to promote dentine formation and to confer an excellent marginal seal. However, there is still room for improvement of this cement as it lacks the anticariogenic effect typically conferred by fluoride ion release as seen in glass ionomer cement based dental materials. Therefore, this study was conducted to investigate the impact of bioactive glass addition to Biodentine™...
October 14, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29040148/long-term-effects-of-bone-morphogenetic-protein-2-loaded-calcium-phosphate-on-maxillary-sinus-lift-surgery-for-delayed-and-simultaneous-dental-implantation
#9
Yuefeng Ding, Xuejuan Wang
Maxillary sinus lift surgery (MSLS) is considered to be a useful treatment method for patients with atrophic alveolar bone. Choosing a suitable surgical procedure to simultaneously decrease graft absorption and obtain long-term survival of dental implants is still a challenge. In this study, 20 patients received MSLS with graft of bone morphogenetic protein 2 (BMP2)-loaded calcium phosphate. Dental implants were placed simultaneously in 10 patients receiving MSLS (1-stage group), and in 10 patients receiving dental implants with a 3 to 6 months delay (2-stage group)...
October 16, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29039617/the-electrical-properties-and-glass-transition-of-some-dental-materials-after-temperature-exposure
#10
Agnieszka Marcinkowska, Marlena Gauza-Wlodarczyk, Leszek Kubisz, Wieslaw Hedzelek
The physicochemical properties of dental materials will remain stable only when these materials in question are resistant to the changes in the oral cavity. The oral environment is subject to large temperature variations. The aim of the study was the assessment of electrical properties and glass transition of some dental materials after temperature exposure. Composite materials, compomers, materials for temporary prosthetic replacement and resin-based pit and fissure sealants were used in the study. The method used was electric conductivity of materials under changing temperature...
October 17, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29037476/zirconia-incorporated-zinc-oxide-eugenol-has-improved-mechanical-properties-and-cytocompatibility-with-human-dental-pulp-stem-cells
#11
Soo Kyung Jun, Hae-Won Kim, Hae-Hyoung Lee, Jung-Hwan Lee
OBJECTIVE: Zinc oxide eugenol (ZOE) is widely used as a therapeutic dental restorative material. However, ZOE has poor mechanical properties and high cytotoxicity toward human dental pulp stem cells (hDPSCs) due to the release of Zn ions. In this study, zirconia-incorporated ZOE (ZZrOE) was developed to reduce the cytotoxicity and improve the mechanical properties of ZOE with sustained therapeutic effects on inflamed hDPSCs in terms of inflammatory gene expression levels compared with those of the original material...
October 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29037418/was-mesopithecus-a-seed-eating-colobine-assessment-of-cracking-grinding-and-shearing-ability-using-dental-topography
#12
Ghislain Thiery, Geoffrey Gillet, Vincent Lazzari, Gildas Merceron, Franck Guy
Extant colobine monkeys have been historically described as specialized folivores. However, reports on both their behavior and dental metrics tend to ascribe a more varied diet to them. In particular, several species, such as Pygathrix nemaeus and Rhinopithecus roxellana, are dedicated seasonal seed eaters. They use the lophs on their postcanine teeth to crack open the hard endocarp that protects some seeds. This raises the question of whether the bilophodont occlusal pattern of colobine monkeys first evolved as an adaptation to folivory or sclerocarpic foraging...
November 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/29035694/novel-zirconia-materials-in-dentistry
#13
Y Zhang, B R Lawn
Zirconias, the strongest of the dental ceramics, are increasingly being fabricated in monolithic form for a range of clinical applications. Y-TZP (yttria-stabilized tetragonal zirconia polycrystal) is the most widely used variant. However, current Y-TZP ceramics on the market lack the aesthetics of competitive glass-ceramics and are therefore somewhat restricted in the anterior region. This article reviews the progressive development of currently available and next-generation zirconias, representing a concerted drive toward greater translucency while preserving adequate strength and toughness...
October 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29034598/a-prospective-randomized-controlled-trial-of-the-two-window-technique-without-membrane-versus-the-solo-window-technique-with-membrane-over-the-osteotomy-window-for-maxillary-sinus-augmentation
#14
Huajie Yu, Danqing He, Lixin Qiu
BACKGROUND: Maturation of the grafted volume after lateral sinus elevation is crucial for the long-term survival of dental implants. PURPOSE: To compare endo-sinus histomorphometric bone formation between the solo- and two-window maxillary sinus augmentation techniques with or without membrane coverage for the rehabilitation of multiple missing posterior teeth. MATERIALS AND METHODS: Patients with severely atrophic posterior maxillae were randomized to receive lateral sinus floor elevation via the solo-window technique with membrane coverage (Control Group) or the two-window technique without coverage (Test Group)...
October 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29034501/influence-of-dental-materials-on-cells-of-the-equine-periodontium
#15
H Ringeisen, A Pöschke, B Krähling, C Schröck, M Stoll, J Vogelsberg, K Failing, C Staszyk
BACKGROUND: Therapy for equine periodontal disease can include filling of the periodontal pockets and widened interproximal spaces. Recommended dental materials are generally adopted from human dentistry. OBJECTIVES: To evaluate the biocompatibility of dental materials for equine periodontal fillings in vitro. STUDY DESIGN: In vitro experiments. METHODS: Four different dental materials (PeriCare(®) , Provicol(®) , Calxyl(®) and Honigum) were tested on equine periodontal fibroblasts...
October 16, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29032813/light-cured-tricalcium-silicate-toxicity-to-the-dental-pulp
#16
Charlotte Jeanneau, Patrick Laurent, Charlotte Rombouts, Thomas Giraud, Imad About
INTRODUCTION: Numerous studies reported dentin bridge formation after pulp capping with tricalcium silicates. By contrast, pulp capping with resins leads to pulp toxicity and inflammation. Hybrid materials made up of tricalcium silicates and resins have also been developed to be used in direct pulp capping. This work was designed to study the consequences of adding resins to tricalcium silicates by investigating TheraCal (BISCO, Lançon De Provence, France) and Biodentine (Septodont, Saint Maur des Fosses, France) interactions with the dental pulp...
October 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29032313/influence-of-platform-diameter-in-the-reliability-and-failure-mode-of-extra-short-dental-implants
#17
Dimorvan Bordin, Edmara T P Bergamo, Estevam A Bonfante, Vinicius P Fardin, Paulo G Coelho
PURPOSE: To evaluate the influence of implant diameter in the reliability and failure mode of extra-short dental implants. MATERIALS AND METHODS: Sixty-three extra-short implants (5mm-length) were allocated into three groups according to platform diameter: Ø4.0-mm, Ø5.0-mm, and Ø6.0-mm (21 per group). Identical abutments were torqued to the implants and standardized crowns cemented. Three samples of each group were subjected to single-load to failure (SLF) to allow the design of the step-stress profiles, and the remaining 18 were subjected to step-stress accelerated life-testing (SSALT) in water...
September 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29029969/cross-year-peer-assisted-learning-using-the-inverted-flipped-classroom-design-a-pilot-study-in-dentistry
#18
Maximilian Quoß, Stefan Rüttermann, Susanne Gerhardt-Szep
BACKGROUND: The inverted classroom model (ICM) represents a special combination of online and attendance learning. The implementation of the didactic concept of "peer-assisted learning" (PAL) within an ICM design has not yet been described in the literature for the field of restorative dentistry. OBJECTIVE: It was the goal of the present study to develop an ICM offering in a cross-year PAL format (ICM-cyPAL), and then introduce and evaluate it. METHOD: The pilot project was conducted at the dental clinic at the Goethe University of Frankfurt/Main, where following its conceptual development and implementation with three consecutive cohorts of students in their first clinical semester (the sixth semester at university) the ICM-cyPAL offering was evaluated...
October 10, 2017: Zeitschrift Für Evidenz, Fortbildung und Qualität Im Gesundheitswesen
https://www.readbyqxmd.com/read/29029849/impact-of-the-heating-quenching-process-on-the-mechanical-optical-and-thermodynamic-properties-of-polyetheretherketone-peek-films
#19
Lisa Bodden, Nina Lümkemann, Valerie Köhler, Marlis Eichberger, Bogna Stawarczyk
OBJECTIVE: The aim of this study was to investigate the impact of a heating/quenching process on the optical, mechanical and thermodynamic properties of filled (20%_4000) and unfilled PEEK films (0%_2000 and 0%_4000). Heating/quenching was performed to simulate thermoforming as possible method to process thermoplastic polymers for dental application. METHODS: For the investigation, films of different PEEK qualities (0%_2000, 0%_4000, 20%_4000) were produced using isostatic pressing (n=10/quality)...
October 10, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29029848/fluoride-containing-bioactive-glass-composite-for-orthodontic-adhesives-ion-release-properties
#20
N A Al-Eesa, F S L Wong, A Johal, R G Hill
OBJECTIVE: Dental materials that release calcium, phosphate and fluoride ions could prevent demineralisation and/or enhance remineralisation of enamel. The objective was to develop a novel bioactive glass (BAG) resin and investigate pH changes and ion release in 3 immersion media. METHODS: Quench melt derived BAG (35.25% SiO2, 6% Na2O, 43% CaO, 5.75% P2O5, and 10% CaF2) was incorporated into a resin (42.25% BisEMA, 55% TEGDMA, 0.25% DMAEM, 0.5% camphorquinone and 2% 4-Meta), with a filler load of 80% by weight...
November 2017: Dental Materials: Official Publication of the Academy of Dental Materials
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