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https://www.readbyqxmd.com/read/28331805/prevotella-osteomyelitis-after-dental-capping-procedure
#1
Alexander Williams, Thomas Kerkering
We present a 49 year old man who presented to the emergency department with severe lower back pain of 5 days duration. One week prior he had been diagnosed with a right psoas muscle abscess and was discharged with a 28 day course of moxifloxacin after the preliminary culture from the psoas grew an anaerobic organism. MRI of the lumbar spine showed marrow edema in the L2 body, occupying most of the anterior two thirds of the body, with cortical erosion at the anteroinferior aspect of L1. Blood cultures were negative and bone biopsy of L2 showed neutrophilic invasion and reactive changes...
2017: IDCases
https://www.readbyqxmd.com/read/28326699/-influence-of-surface-roughness-on-oral-streptococcal-adhesion-forces-to-dental-filling-materials
#2
Zheng Sainan, Jiang Li, Zhang Lei, Hao Liying, Ye Lu, Li Wei
OBJECTIVE: This study is to determine the common oral streptococcal adhesion forces by using composite resin and glass ionomer cement (GIC) with different degrees of surface roughness via atomic force microscopy (AFM) analysis. The influence of surface roughness on bacterial adhesion force is also discussed. METHODS: Polishing and grinding were applied to obtain 300, 200, 100, and 10 nm surfaces of light-cured composite resin and GIC samples. Surface topography was assessed by AFM analysis...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326155/dental-plaque-microbial-profiles-of-children-from-khartoum-sudan-with-congenital-heart-defects
#3
Hiba Mohamed Ali, Ellen Berggreen, Daniel Nguyen, Raouf Wahab Ali, Thomas E Van Dyke, Hatice Hasturk, Manal Mustafa
Few studies have focused on the bacterial species associated with the deterioration of the dental and gingival health of children with congenital heart defects (CHD). The aims of this study were (1) to examine the dental plaque of children with CHD in order to quantify bacterial load and altered bacterial composition compared with children without CHD; and (2) to investigate the correlation between the level of caries and gingivitis and dental biofilm bacteria among those children. In this cross-sectional study, participants were children (3-12 years) recruited in Khartoum State, Sudan...
2017: Journal of Oral Microbiology
https://www.readbyqxmd.com/read/28320562/microstructural-characterization-of-dental-zinc-phosphate-cements-using-combined-small-angle-neutron-scattering-and-microfocus-x-ray-computed-tomography
#4
Alberto Viani, Konstantinos Sotiriadis, Ivana Kumpová, Lucia Mancini, Marie-Sousai Appavou
OBJECTIVE: To characterize the microstructure of two zinc phosphate cement formulations in order to investigate the role of liquid/solid ratio and composition of powder component, on the developed porosity and, consequently, on compressive strength. METHODS: X-ray powder diffraction with the Rietveld method was used to study the phase composition of zinc oxide powder and cements. Powder component and cement microstructure were investigated with scanning electron microscopy...
February 17, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28320468/subgingival-microbiota-dysbiosis-in-systemic-lupus-erythematosus-association-with-periodontal-status
#5
Jôice Dias Corrêa, Débora Cerqueira Calderaro, Gilda Aparecida Ferreira, Santuza Maria Souza Mendonça, Gabriel R Fernandes, E Xiao, Antônio Lúcio Teixeira, Eugene J Leys, Dana T Graves, Tarcília Aparecida Silva
BACKGROUND: Periodontitis results from the interaction between a subgingival biofilm and host immune response. Changes in biofilm composition are thought to disrupt homeostasis between the host and subgingival bacteria resulting in periodontal damage. Chronic systemic inflammatory disorders have been shown to affect the subgingival microbiota and clinical periodontal status. However, this relationship has not been examined in subjects with systemic lupus erythematosus (SLE). The objective of our study was to investigate the influence of SLE on the subgingival microbiota and its connection with periodontal disease and SLE activity...
March 20, 2017: Microbiome
https://www.readbyqxmd.com/read/28318544/stereolithography-a-new-method-for-processing-dental-ceramics-by-additive-computer-aided-manufacturing
#6
Marion Dehurtevent, Lieven Robberecht, Jean-Christophe Hornez, Anthony Thuault, Etienne Deveaux, Pascal Béhin
OBJECTIVES: The aim of this study was to compare the physical and mechanical properties of stereolithography (SLA)- manufactured alumina ceramics of different composition to those of subtractive- manufactured ceramics and to produce suitable dental crown frameworks. METHODS: The physical and mechanical properties of a control and six experimental SLA ceramics prepared from slurries with small (S) and large (L) particles (0.46±0.03 and 1.56±0.04μm, respectively) and three dry matter contents (70%, 75%, 80%) were evaluated by dynamic rheometry, hydrostatic weighing, three3-point flexural strength measurements, and Weibull analyses, and by the micrometrics measurement of shrinkage ratio before and after the heat treatments...
March 16, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28318391/models-of-caries-formation-around-dental-composite-restorations
#7
J L Ferracane
The main reason cited for the replacement of dental composite restorations is the recurrence of caries. Numerous models-both in vitro, with acid gels or bacterial biofilms, and in situ, with dental appliances-have been used to study caries formation around dental composites. The literature shows that many factors may affect caries formation, including marginal gap formation, gap size, the local chemical environment, the durability of the bonded interface, the extent of bacterial penetration, and the presence of mechanical loading...
April 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28316952/interface-between-mta-and-dental-bonding-agents-scanning-electron-microscope-evaluation
#8
Gabriele Cervino, Luca Fiorillo, Gianrico Spagnuolo, Ennio Bramanti, Luigi Laino, Floriana Lauritano, Marco Cicciù
AIMS AND OBJECTIVES: Nowadays, the material that offers the best sealing characteristic in the field of endodontic treatment is the mineral trioxide aggregate (MTA), nevertheless, this material necessities an adhesive bonding agent to perfectly join to the dental surface. The aim of this study was to analyze using a scanning electron microscope (SEM) the possible microgap between the adhesive, MTA, and the dental surface. MATERIAL AND METHODS: Fourteen extracted molars were divided into two groups - group A was prepared with MTA-component adhesive and group B was prepared with MTA and composite dual etching...
January 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28303827/characterisation-of-the-human-oral-microbiome-in-patients-with-coronary-artery-disease-using-next-generation-sequencing-of-16srrna-amplicons
#9
Thangam Menon, Sathya Narayanan Gopalakrishnan, Rayvathy Balasubramanian, Stalin Roy Justin
INTRODUCTION: Oral health is suspected to be linked to heart disease since species of bacteria that cause periodontitis and dental caries have been found in the atherosclerotic plaque in arteries in the heart. OBJECTIVES: The aim of this study was to characterize the oral microbiome in patients with coronary artery disease (CAD) and in a patient with dental caries (DC) without any clinical symptoms of CAD. METHODS: DNA was extracted from the oral swabs collected from the patients and sequencing was performed by next generation sequencing method using Illumina (MiSeq) platform...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28301026/characterization-of-conventional-and-high-translucency-y-tzp-dental-ceramics-submitted-to-air-abrasion
#10
Bhenya Ottoni Tostes, Renato Bastos Guimarães, Jaime Dutra Noronha-Filho, Glauco Dos Santos Botelho, José Guilherme Antunes Guimarães, Eduardo Moreira da Silva
This study evaluated the effect of air-abrasion on t®m phase transformation, roughness, topography and the elemental composition of three Y-TZP (Yttria-stabilized tetragonal zirconia polycrystal) dental ceramics: two conventional (Lava Frame and IPS ZirCad) and one with high-translucency (Lava Plus). Plates obtained from sintered blocks of each ceramic were divided into four groups: AS (as-sintered); 30 (air-abrasion with 30 mm Si-coated Al2O3 particles); 50 (air-abrasion with 50 mm Al2O3 particles) and 150 (air-abrasion with 150 mm Al2O3 particles)...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28301024/comparison-of-cone-beam-computed-tomography-and-intraoral-radiography-in-detection-of-recurrent-caries-under-composite-restorations
#11
Shahin Kasraei, Abbas Shokri, Jalal Poorolajal, Samira Khajeh, Hamid Rahmani
Secondary caries is the most common cause of dental restoration failures. This study aimed to compare the diagnostic accuracy of conventional and digital intraoral radiography and cone beam computed tomography (CBCT) for detection of recurrent caries around composite restorations. mesio-occluso-distal (MOD) cavities were prepared using bur on 45 extracted sound human molar teeth. The teeth were divided into 3 groups. In the control group, cavities were restored with composite resin after etching and bonding (n=15)...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28301009/survival-and-factors-associated-with-failure-of-pulpectomies-performed-in-primary-teeth-by-dental-students
#12
Juliane Priscila Brustolin, Adriela Azevedo Souza Mariath, Thiago Machado Ardenghi, Luciano Casagrande
Although endodontic treatment is widely recommended for compromised dental pulp, there is no information regarding the factors associated with failures in primary teeth. The aim of this study was to evaluate the survival and factors associated with failure of pulpectomies performed in primary teeth by dental students. The sample comprised patients treated at a University Dental Service and required endodontic treatment in primary teeth. The study investigated treatment-related variables and patient factors potentially associated with treatment failure...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28298988/bond-strength-of-dental-nanocomposites-repaired-with-a-bulkfill-composite
#13
Uzay Koç-Vural, Leyla Kerimova, İsmail H Baltacioglu, Arlin Kiremitçi
BACKGROUND: The aim of this study was to analyze the bond strength of aged resin based nanocomposites repaired with the same and bulk fill composites. MATERIAL AND METHODS: Seventy-two disc shaped resin composites consisted of three different nanocomposite resins (Filtek Ultimate/FU, Herculite XRV Ultra/HXRV, and Reflectys/R) were produced. After storing the samples for 8 weeks in distilled water, each material was combined with the same material or the bulk-fill composite resin system (Filtek Ultimate+Filtek Ultimate/Group-1; Filtek Ultimate+Tetric BF/Group-2; Herculite XRV+Herculite XRV/Group-3; Herculite XRV+Tetric BF/ Group-4; Reflectys+Reflectys/Group 5; Reflectys+Tetric BF/Group-6), for repair...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298987/effect-of-different-concentrations-of-specific-inhibitor-of-matrix-metalloproteinases-on-the-shear-bond-strength-of-self-adhesive-resin-cements-to-dentin
#14
Mohammad-Esmaeel Ebrahimi-Chaharom, Mehdi Abed-Kahnamoui, Mahmoud Bahari, Hamed Hamishehkar, Mahya Gharouni
BACKGROUND: Considering the probability of chemical and enzymatic reactions between matrix metalloproteinases (MMPs) in the dentin structure and their specific inhibitors, the aim of the present study was to evaluate the effect of different concentrations of specific inhibitor of MMPs (galardin) on the shear bond strength of self-adhesive resin cements to dentin. MATERIAL AND METHODS: Forty-eight sound human premolars were mounted in self-cured acrylic resin after removal of the enamel on the buccal and lingual surfaces...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28296966/an-oral-multispecies-biofilm-model-for-high-content-screening-applications
#15
Nadine Kommerein, Sascha N Stumpp, Mathias Müsken, Nina Ehlert, Andreas Winkel, Susanne Häussler, Peter Behrens, Falk F R Buettner, Meike Stiesch
Peri-implantitis caused by multispecies biofilms is a major complication in dental implant treatment. The bacterial infection surrounding dental implants can lead to bone loss and, in turn, to implant failure. A promising strategy to prevent these common complications is the development of implant surfaces that inhibit biofilm development. A reproducible and easy-to-use biofilm model as a test system for large scale screening of new implant surfaces with putative antibacterial potency is therefore of major importance...
2017: PloS One
https://www.readbyqxmd.com/read/28288289/effect-of-children-s-drinks-on-color-stability-of-different-dental-composites-an-in-vitro-study
#16
Ahmed Nour El-Din Ahmed Habib, Soad Abdelmoniem Abdelmoniem, Sara Ahmed Mahmoud
AIM: To assess the effect of four different children's drinks on color stability of resin dental composites. STUDY DESIGN: A total of one hundred and twenty specimens were prepared from Grandio SO, Filtek Z350 XT and Filtek Z250 XT (forty specimens each). Specimens were thermocycled, then each group was further subdivided into four subgroups (n=10) according to the immersion media which were chocolate milk, mango juice, orange fizzy drink, and water (control). The initial color parameters of each specimen were recorded before immersion (baseline) and color change values were recorded three and seven days after immersion in each solution using a digital spectrophotometer...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28286393/versatility-of-fibula-free-flap-in-reconstruction-of-facial-defects-a-center-study
#17
Sunil S Shroff, Sanjiv C Nair, Anjan Shah, Balasubramanya Kumar
PURPOSE: To study a series of cases where vascularised fibula flap was used in various combinations of bone with muscle and skin along with its modifications for reconstruction of simple and composite defects of the facial region. PATIENTS AND METHODS: The investigators designed a retrospective study composed of patients with any pathology or defect who underwent reconstruction of maxilla or mandible with vascularised fibula free flap from 2009 to 2013. All patients were evaluated for age, gender, location and type of defect, incorporation of adjoining skin paddle and muscle, number of fibula osteotomies, ischaemia time, anticoagulant regimen, length of hospital stay, flap failure rate, dental implant rehabilitation...
March 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28285095/quantitative-proteomic-analysis-of-extracellular-matrix-extracted-from-mono-and-dual-species-biofilms-of-fusobacterium-nucleatum-and-porphyromonas-gingivalis
#18
Marwan Mansoor Ali Mohammed, Veronika Kuchařová Pettersen, Audun H Nerland, Harald G Wiker, Vidar Bakken
The Gram-negative bacteria Fusobacterium nucleatum and Porphyromonas gingivalis are members of a complex dental biofilm associated with periodontal disease. In this study, we cultured F. nucleatum and P. gingivalis as mono- and dual-species biofilms, and analyzed the protein composition of the biofilms extracellular polymeric matrix (EPM) by high-resolution liquid chromatography-tandem mass spectrometry. Label-free quantitative proteomic analysis was used for identification of proteins and sequence-based functional characterization for their classification and prediction of possible roles in EPM...
March 9, 2017: Anaerobe
https://www.readbyqxmd.com/read/28283194/cell-responses-to-cariogenic-microorganisms-and-dental-resin-materials-crosstalk-at-the-dentin-pulp-interface
#19
REVIEW
Helmut Schweikl, Wolfgang Buchalla, Stephanie Krifka
OBJECTIVE: Resin monomers released from unpolymerized dental adhesives or composites and bacterial products like lipopolysaccharide (LPS) or lipoteichoic (LTA) are simultaneously present in specific applications following treatment of deep caries lesions. This review is focused on evidence concerning cell responses as a result of the interactions between adaptive mechanisms activated by resin monomers and signaling pathways of the immune response triggered by LPS or LTA originating from cariogenic microorganisms...
March 7, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28282514/the-proteomic-profile-of-the-acquired-enamel-pellicle-according-to-its-location-in-the-dental-arches
#20
Talita Mendes da Silva Ventura, Luiza de Paula Silva Cassiano, Cíntia Maria de Souza E Silva, Even Akemi Taira, Aline de Lima Leite, Daniela Rios, Marília Afonso Rabelo Buzalaf
OBJECTIVE: This study evaluated the variation in the protein profile of the acquired enamel pellicle (AEP) formed in vivo according to its location in the dental arches. DESIGN: The AEP was formed for 120min in 9 volunteers. Pellicle formed at upper+lower anterior facial (ULAFa; teeth 13-23 and 33-43), upper anterior palatal (UAPa; teeth 13-23), lower anterior lingual (LALi; teeth 33-43), upper+lower posterior facial (ULPFa; teeth 14-17 24-27, 34-37 and 44-47), upper posterior palatal (UPPa; teeth 14-17 and 24-27) and lower posterior lingual (LPLi; teeth 34-37 and 44-47) regions were collected separately and processed for analysis by label-free LC-ESI-MS/MS...
March 3, 2017: Archives of Oral Biology
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