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Odontology

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https://read.qxmd.com/read/30758697/aerobic-and-anaerobic-microorganisms-and-antibiotic-sensitivity-of-odontogenic-maxillofacial-infections
#1
Emmanuel López-González, Marlen Vitales-Noyola, Ana María González-Amaro, Verónica Méndez-González, Antonio Hidalgo-Hurtado, Rosaura Rodríguez-Flores, Amaury Pozos-Guillén
This study aimed to identify the aerobic and anaerobic causal microorganisms of odontogenic infections and their antibiotic sensitivity. Purulent exudates were taken from patients with odontogenic infections by transdermal puncture, and aerobic and anaerobic microorganisms were identified using biochemical tests. Susceptibility to antibiotics was tested using the Kirby-Bauer method; the inhibition halos were measured according to NCCLS, and based on the results, the microorganisms were classified as susceptible, intermediate or resistant to each antibiotic...
February 13, 2019: Odontology
https://read.qxmd.com/read/30721386/correction-to-treatment-of-stage-ii-medication-related-osteonecrosis-of-the-jaw-with-necrosectomy-and-autologous-bone-marrow-mesenchymal-stem-cells
#2
Pit Jacob Voss, Akihiko Matsumoto, Esteban Alvarado, Rainer Schmelzeisen, Fabian Duttenhoefer, Philipp Poxleitner
In the Original publication of the article, the co-author has been misspelled as Fabian Duttenhöfer in the article "Treatment of stage II medication-related osteonecrosis of the jaw with necrosectomy and autologous bone marrow mesenchymal stem cells" published in October 2017, Volume 105, Issue 4 of Odontology. The correct name is "Fabian Duttenhoefer".
February 5, 2019: Odontology
https://read.qxmd.com/read/30719639/review-modulation-of-the-oral-microbiome-by-the-host-to-promote-ecological-balance
#3
REVIEW
Pilar Cornejo Ulloa, Monique H van der Veen, Bastiaan P Krom
The indivisible relationship between the human host and its oral microbiome has been shaped throughout the millennia, by facing various changes that have forced the adaptation of oral microorganisms to new environmental conditions. In this constant crosstalk between the human host and its microbiome, a bidirectional relationship has been established. The microorganisms provide the host with functions it cannot perform on its own and at the same time the host provides its microbes with a suitable environment for their growth and development...
February 4, 2019: Odontology
https://read.qxmd.com/read/30715631/correction-to-internal-and-marginal-adaptation-of-high-viscosity-bulk-fill-composites-in-class-ii-cavities-placed-with-different-adhesive-strategies
#4
Rainer Haak, Thomas Näke, Kyung-Jin Park, Dirk Ziebolz, Felix Krause, Hartmut Schneider
In the original publication of the article the paragraph "The four resin-based composites…" appearing below the "Materials and methods" section is incomplete. The correct paragraph is provided in this correction below.
February 4, 2019: Odontology
https://read.qxmd.com/read/30710179/structural-and-biomechanical-changes-to-dentin-extracellular-matrix-following-chemical-removal-of-proteoglycans
#5
Ana Paula Farina, Cristina M P Vidal, Doglas Cecchin, Thaiane R Aguiar, Ana K Bedran-Russo
Proteoglycans are biomacromolecules with significant biomineralization and structural roles in the dentin extracellular matrix. This study comprehensively assessed the mechanical properties and morphology of the dentin extracellular matrix following chemical removal of proteoglycans to elucidate the structural roles of proteoglycans in dentin. Dentin extracellular matrix was prepared from extracted teeth after complete tissue demineralization. Chemical removal of proteoglycans was carried-out using guanidine hydrochloride for up to 10 days...
February 1, 2019: Odontology
https://read.qxmd.com/read/30666484/association-between-breast-cancer-chemotherapy-oral-health-and-chronic-dental-infections-a-pilot-study
#6
Ines Willershausen, Irene Schmidtmann, Adriano Azaripour, Jane Kledtke, Brita Willershausen, Annette Hasenburg
Breast cancer has developed to become the leading type of cancer in females. For this study, 80 women were examined after chemotherapy for breast cancer and compared to 80 healthy age-matched women. This cross-sectional study comprised a dental examination with number of teeth, caries frequency (DMFT) and the presence of periodontal diseases (PSI). With the help of X-rays (OPG), the number of root canal fillings and apical lesions (LEO/LPO) were recorded. Furthermore, the education level, body mass index (BMI), smoking habits and general health conditions were recorded...
January 21, 2019: Odontology
https://read.qxmd.com/read/30648197/changes-in-oral-health-related-quality-of-life-after-three-different-strategies-of-implant-therapy-a-clinical-trial
#7
Javier Montero, Javier Dolz, Francisco-Javier Silvestre, Javier Flores, Abraham Dib, Cristina Gómez-Polo
This research aims to evaluate changes in Oral Health-related Quality of Life (OHQoL) by means of the Oral Impacts on Daily Performances (OIDP) of patients treated with three distinct implant strategies. This clinical trial consisted of an oral examination and a questionnaire-based interview carried out before and after the definitive prosthetic rehabilitation in a consecutive sample of patients requiring dental implants. According to the clinical diagnosis and patient preference, patients were assigned to the one of the following groups: the conventional group (CGCL; n = 40), where implants were inserted without guiding and conventionally loaded; to the guided surgery but conventional loading group (GSCL; n = 35); or to the guided surgery and immediate loading group (GSIL; n = 29)...
January 16, 2019: Odontology
https://read.qxmd.com/read/30617664/characterization-of-a-new-fiber-reinforced-flowable-composite
#8
Lippo Lassila, Eija Säilynoja, Roosa Prinssi, Pekka Vallittu, Sufyan Garoushi
This study aimed to evaluate certain physical properties including surface wear of a new experimental short fiber-reinforced flowable resin composite (SFRC) in comparison with different commercial flowable bulk fill resin composites (SDR, Tetric EvoFlow Bulk Fill, Filtek Bulk Fill Flowable and Estelite Bulk Fill Flow). The following properties were examined according to ISO standard: flexural strength, flexural modulus, fracture toughness, water sorption, volumetric shrinkage, and depth of cure. Degree of conversion (DC%) was determined by FTIR spectrometry...
January 8, 2019: Odontology
https://read.qxmd.com/read/30617638/volumetric-measurement-of-dentoalveolar-defects-by-means-of-intraoral-3d-scanner-and-gravimetric-model
#9
Martin J R Lindström, Marianne Ahmad, Ryo Jimbo, Arman Ameri, Per Vult Von Steyern, Jonas P Becktor
The aim of this study was to evaluate the accuracy in volumetric measurements obtained on an experimental model using an intraoral scanner and a gravimetric method. Three identical partial dentate maxillary acrylic models with three fabricated alveolar defects, in anterior and posterior regions, were scanned using an intraoral scanner (20 scans/defects). The defects differed in terms of size and distance of neighbouring teeth. As references, replicas of each defect were created using a dimensional stable silicone impression material...
January 7, 2019: Odontology
https://read.qxmd.com/read/30610399/comparative-evaluation-of-the-mechanical-properties-of-cad-cam-dental-blocks
#10
Ruizhi Yin, Yu-Kyoung Kim, Yong-Seok Jang, Jung-Jin Lee, Min-Ho Lee, Tae-Sung Bae
This study compares the mechanical properties of commercially available CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing) millable dental blocks including Vita Enamic, Lava Ultimate, and MAZIC Duro. All the discs were cut in dimension of 1.2 mm in thickness and 12 mm in diameter, ground up to #1200 Sic papers and polished. The biaxial flexure strength of the ceramic discs was measured after thermocycling treatment and the broken surfaces were observed using scanning electron microscopy (SEM). The discs were brushed using a toothbrush testing machine under a 150 g load...
January 4, 2019: Odontology
https://read.qxmd.com/read/30569286/internal-and-marginal-adaptation-of-high-viscosity-bulk-fill-composites-in-class-ii-cavities-placed-with-different-adhesive-strategies
#11
Rainer Haak, Thomas Näke, Kyung-Jin Park, Dirk Ziebolz, Felix Krause, Hartmut Schneider
The aim of this study was to evaluate internal and marginal adaptation of high-viscosity bulk-fill composites to enamel and dentin with a self-etch (SE) and an etch-and-rinse adhesive (ER) without and with artificial aging. 128 MOD cavities in extracted human molars were prepared, randomly assigned to 8 groups (n = 16), bonded with either OptiBond FL (OFL, ER) or Xeno V+ (X, SE), and restored in 4 mm horizontal bulk layers with SonicFill (SF), Tetric EvoCeram Bulk fill (TEC), and x-tra fil (XF). Incremental layering technique with Premise (P) served as control...
December 19, 2018: Odontology
https://read.qxmd.com/read/30560473/respiratory-rate-is-an-inadequate-parameter-of-ventilation-in-non-intubated-sedation
#12
Keiko Morimoto, Shin Ogura, Kenichiro Shinohara, Katsuhisa Sunada
We compared the respiratory rate (RR) and transcutaneous carbon dioxide pressure ([Formula: see text]) during intravenous sedation (IVS), to determine whether RR is a useful parameter for monitoring ventilation. This was a prospective cohort study. The study sample comprised dental patients who received IVS via propofol or midazolam administration at Nippon Dental University Hospital. We simultaneously measured RR (through capnography), [Formula: see text] (using the [Formula: see text] monitor), and percutaneous oxygen saturation (SpO2 )...
December 17, 2018: Odontology
https://read.qxmd.com/read/30554288/endodontic-sealers-based-on-calcium-silicates-a-systematic-review
#13
REVIEW
David Donnermeyer, Sebastian Bürklein, Till Dammaschke, Edgar Schäfer
Recently, sealers based on calcium silicates were developed as a new class of endodontic sealers. Inspired by the excellent sealing ability and biocompatibility of calcium silicate-based cements, these sealers establish a biological point of view on the obturation of root canals. No longer, the bacteria-tight seal against reinfection of the root canal is the only goal of root canal obturation. Antibacterial properties as well as bioactive inducement of periapical healing and hard tissue formation are added to the portfolio of sealers...
December 15, 2018: Odontology
https://read.qxmd.com/read/30552542/adam28-dramatically-regulates-the-biological-features-of-human-gingival-fibroblasts
#14
Zheng Zhao, Jie Li, Xiu-Na Ding, Lei Zhou, De-Gang Sun
This study was to explore the effects of a disintegrin and metalloproteinase 28 (ADAM28) on the proliferation, differentiation, and apoptosis of human gingival fibroblasts (HGFs) and probable mechanism. After ADAM28 antisense oligodeoxynucleotide (AS-ODN) and sense oligodeoxynucleotide (S-ODN) were transfected into HGFs by Lipofectamine 2000, respectively, the expression discrepancies of ADAM28 among various groups were evaluated by reverse transcription-polymerase chain reaction (RT-PCR) and Western-blotting...
December 14, 2018: Odontology
https://read.qxmd.com/read/30542934/cyclic-fatigue-resistance-of-three-rotary-file-systems-in-a-dynamic-model-after-immersion-in-sodium-hypochlorite
#15
Paulo Jorge Palma, Ana Messias, António Rosa Cerqueira, Luís Diogo Tavares, Francisco Caramelo, Luís Roseiro, João Miguel Santos
To evaluate the effect of immersion in 3% sodium hypochlorite solution in the resistance to cyclic fatigue of three nickel-titanium (NiTi) rotary file systems, ProTaper Next (PTN), Hyflex CM (CM), and Hyflex EDM (EDM), in a mechanical model featuring axial movement. Ninety instruments of three different NiTi rotary file systems, PTN (size 25, 0.06 taper), CM (25, 0.06), and EDM (25/~, variable taper), were randomly divided according to a 3 × 3 factorial design and tested under dynamic immersion in a 3% NaOCl solution (1 or 5 min) or without immersion, making a total of 9 groups (n = 10)...
December 12, 2018: Odontology
https://read.qxmd.com/read/30483996/influence-of-environmental-temperature-heat-treatment-and-design-on-the-cyclic-fatigue-resistance-of-three-generations-of-a-single-file-nickel-titanium-rotary-instrument
#16
Simone Staffoli, Nicola Maria Grande, Gianluca Plotino, Taha Özyürek, Mustafa Gündoğar, Leonzio Fortunato, Antonella Polimeni
The aim of the present study was to evaluate the effect of environmental temperature, heat-treatment*** and design on the cyclic fatigue resistance of OneShape (OS), OneShape new generation (OSNG) and One Curve (OC) NiTi rotary single-file instruments. Cyclic fatigue testing of NiTi instruments was performed in an artificial canal with a 5-mm radius of curvature and a 60° angle of curvature located 5 mm from the tip of the instrument. During the experiment 3 different temperatures were used in a thermostatic bath with electronic and infrared controls: 0°, 20° and 35 °C...
November 27, 2018: Odontology
https://read.qxmd.com/read/30478679/isolation-and-characterization-of-cells-derived-from-human-epithelial-rests-of-malassez
#17
Kayoko Kitajima, Ridhima Das, Xiao Liang, Evelyn Neppelberg, Anne Christine Johannessen, Daniela Elena Costea, Masaru Igarashi
The epithelial rests of Malassez (ERMs) might represent a valuable source of oral epithelial cells with stem cell properties. The purpose of this study was to isolate and characterize cells derived from human ERM, and compare them with cells derived from matched normal oral mucosa (NOM). Matched tissue specimens of the periodontal ligament of extracted tooth and NOM were collected. Cells were isolated in culture, then characterized by immunohistochemistry and flow cytometry for expression of pancytokeratin, ESA, PDGFRB, CD31 and CD44...
November 26, 2018: Odontology
https://read.qxmd.com/read/30467810/demineralized-enamel-reduces-margin-integrity-of-self-etch-but-not-of-etch-and-rinse-bonded-composite-restorations
#18
Philipp Körner, Aljmedina Sulejmani, Daniel B Wiedemeier, Thomas Attin, Tobias T Tauböck
The aim of this study was to investigate margin integrity of Class V composite restorations in demineralized and sound enamel after bonding with different etch-and-rinse and self-etch adhesive systems. Out of a total of 60 specimens from bovine incisors, 30 specimens were demineralized (21 days, acid buffer, pH 4.95) to create artificial enamel lesions. Circular Class V cavities were prepared in all 60 specimens and treated with either an unfilled etch-and-rinse adhesive (Syntac Classic; Ivoclar Vivadent), a filled etch-and-rinse adhesive (Optibond FL; Kerr), or a self-etch adhesive (iBond Self Etch; Heraeus) (n = 10 per group)...
November 22, 2018: Odontology
https://read.qxmd.com/read/30430266/effects-of-oral-ingestion-on-physical-functions-before-tube-feeding-in-adults-with-severe-motor-and-intellectual-disabilities
#19
Yujiro Nakazawa, Fumiyo Tamura, Sae Genkai, Hiroki Shindo, Tomoko Isoda, Miki Mizukami, Takeshi Kikutani
This study aimed to determine the significance of oral ingestion in tube-fed adults. Six males and three females (mean age 48.1 ± 12.4 years) with severe motor and intellectual disabilities were included in this study. The subjects were monitored for cerebral blood flow (CBF) by functional near-infrared spectroscopy imaging, gastric motor function by electrogastrography, and arterial oxygen saturation (SpO2 ) and pulse rate with a biological data monitoring device. The subjects were divided into two groups, settings A and B...
November 14, 2018: Odontology
https://read.qxmd.com/read/30324571/exosomes-in-perspective-a-potential-surrogate-for-stem-cell-therapy
#20
REVIEW
Ke Ren
Exosomes as a unique subtype of small extracellular vesicles (sEVs) have attracted increasing interest in recent years in the fields of mesenchymal stromal cell (MSC) research. Studies have confirmed that exosomes derived from MSCs preserve immunosuppressive phenotype and can mimic therapeutic benefits of their parent cells. This review briefly summarizes most recent findings on the potential of exosomes as an alternative of therapeutic MSCs, focusing on the role of MSCs and their secreted exosomes in regulation of immune cells, preclinical and clinical evidence of therapeutic outcomes of MSC exosomes, and the biodistribution and pharmacokinetic profile of systemically administered exosomes...
October 15, 2018: Odontology
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