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Fabio Camacho-Alonso, P Salmerón-Lozano, Y Martínez-Beneyto
The aim of this study was to evaluate the antibacterial effect of photodynamic therapy (PDT), 2 % chlorhexidine (CHX). The teeth were contaminated with 0.1 mL Enterococcus faecalis (3 × 10(8) cell/mL) and randomized into eight treatment groups: Group 1 (2.5 % NaOCl); Group 2 (PDT); Group 3 (2 % CHX); Group 4 (TAM); Group 5 (propolis), Group 6 (ozone), Group 7 (positive control) and Group 8 (negative control). Following treatment, the canal content was sampled. The samples were cultured in triplicate on blood agar plates to determine the number of colony forming units (CFU)/mL...
October 22, 2016: Odontology
Yumiko Ohbayashi, Fumi Nakai, Akinori Iwasaki, Takaaki Ogawa, Yuka Yamamoto, Yoshihiro Nishiyama, Minoru Miyake
The duration of antiresorptive therapy is an important risk factor for medication-related osteonecrosis of the jaw. We performed a pilot study using quantitative analysis by bone scintigraphy to test the hypothesis that mandibular metabolism is affected by long-term bisphosphonate (BP) therapy. Our primary objectives were to assess changes in bone metabolism of the mandible in response to long-term BP therapy and compare the bone metabolism changes of the mandible with other bone sites. We compared the metabolic difference at the site in the mandible unaffected by disease, the humerus and the femur between 14 osteoporosis patients who were being treated with BP (BP group) and 14 patients who were not being treated with BP (control group) using a quantitative analysis and bone scintigraphy...
October 21, 2016: Odontology
Dimitrios Dionysopoulos, Dimitrios Strakas, Eugenia Koliniotou-Koumpia, Effimia Koumpia
The aim of this in vitro study was to evaluate the effect of using Er,Cr:YSGG laser during in-office tooth bleaching on bovine enamel surface to evaluate the safety of this therapy on tooth tissues. Thirty-six enamel specimens were prepared from bovine incisors and divided into three groups: Group 1 specimens (control) received no bleaching treatment; Group 2 received a conventional in-office bleaching treatment (40 % H2O2); Group 3 received laser-assisted bleaching procedure (40 % H2O2) utilizing an Er,Cr:YSGG laser...
October 14, 2016: Odontology
María Melo, Agustín Pascual, Isabel Camps, Ángel Del Campo, Javier Ata-Ali
The objective of the study was to evaluate the in vivo effectiveness of two fluorescence techniques (DIAGNOdent and VistaProof) and of visual and tactile evaluation in the diagnosis of occlusal caries in permanent teeth. A total of 302 teeth (molars and premolars) from 152 patients were studied. The occlusal surfaces were cleaned using pumice mixed with water, followed by application of the diagnostic methods according to the instructions of the manufacturer, and of the visual and tactile methods according to the recommendations...
September 21, 2016: Odontology
Tsutomu Sugaya, Mahito Tomita, Youji Motoki, Khurshiduz Zaman, Hirofumi Miyaji, Masamitsu Kawanami
The aim of this study was to determine whether sealing of fracture gap using adhesive resin through the root canal can prevent inflammation of periodontal tissue, and resealing the incompletely sealed fracture gap from outside can resolve such inflammation in experimentally created vertical root fractures. Vertical root fractures were created in incisor of beagles. In the experimental group, the fracture gap was sealed through the root canal with adhesive resin. After 5 weeks, sites with the clinical attachment level ≥4 mm were further divided randomly into the poor-replanting group and the poor-untreated group...
September 21, 2016: Odontology
Zeeshan Sheikh, Javairia Qureshi, Abdullah M Alshahrani, Heba Nassar, Yuichi Ikeda, Michael Glogauer, Bernhard Ganss
Certain cell populations within periodontal tissues possess the ability to induce regeneration, provided they have the opportunity to populate the wound or defect. Guided regeneration techniques have been investigated for regenerating periodontal tissues and such therapies usually utilize barrier membranes. Various natural and synthetic barrier membranes have been fabricated and tested to prevent epithelial and connective tissue cells from invading while allowing periodontal cells to selectively migrate into the defect...
September 9, 2016: Odontology
R G Shahi, M T P Albuquerque, E A Münchow, S B Blanchard, R L Gregory, M C Bottino
The purpose of this investigation was to determine the ability of tetracycline-containing fibers to inhibit biofilm formation of peri-implantitis-associated pathogens [i.e., Porphyromonas gingivalis (Pg), Fusobacterium nucleatum (Fn), Prevotella intermedia (Pi), and Aggregatibacter actinomycetemcomitans (Aa)]. Tetracycline hydrochloride (TCH) was added to a poly(DL-lactide) [PLA], poly(ε-caprolactone) [PCL], and gelatin [GEL] polymer blend solution at distinct concentrations to obtain the following fibers: PLA:PCL/GEL (TCH-free, control), PLA:PCL/GEL + 5 % TCH, PLA:PCL/GEL + 10 % TCH, and PLA:PCL/GEL + 25 % TCH...
September 1, 2016: Odontology
Rie Fujiyama, Kazuo Toda
Thermal modulation of signaling pathways leads to excitation of taste receptor cells, but the underlying mechanisms remain unclear. Furthermore, it has long been known that there are contrast effects in various senses. In this study, we investigated cold-taste contrast and the relationship between taste and somatosensation. We lowered intraoral temperature using cold stimulus as a pretreatment, then returned to normal temperature in 249 healthy subjects, before administering room temperature taste-stimulating solutions to investigate changes in sensitivity to the four basic tastes (Sweet, Salt, Sour, and Bitter)...
August 22, 2016: Odontology
Yahya Açil, Jan Sievers, Aydin Gülses, Mustafa Ayna, Jörg Wiltfang, Hendrik Terheyden
The aim of this study was to evaluate the correlation between resonance frequency analysis (RFA) values and the histomorphometric bone-implant contact (BIC) immediately after insertion of the implant. Additionally, it was examined to define which extent peak insertion torque (PIT) was correlated with the latter measurements. 15 Xive(®) S plus root from dental implants were inserted in fresh porcine frontal bones. The insertion torque was measured with the Kavo Intrasurg 300 surgical unit. RFA connector was coupled to the implants and the mean value of 20 consecutive RFA measurements was calculated via Osstell(®) ISQ device...
August 18, 2016: Odontology
Martin M I Sabandal, Edgar Schäfer
Mineralization defects like amelogenesis imperfecta are often of hereditary origin. This article reviews the diagnostic findings and summarizes the suggested treatment approaches. Currently, there are no defined therapy recommendations available for patients suffering from amelogenesis imperfecta. The mentioned therapies are more or less equal but no comprehensive therapy recommendation is evident. When treating patients suffering from amelogenesis imperfecta, a comprehensive therapy of almost every dental discipline has to be considered...
September 2016: Odontology
Dalia Kaisarly, Moataz El Gezawi
Composite restorations are widely used worldwide, but the polymerization shrinkage is their main disadvantage that may lead to clinical failures and adverse consequences. This review reports, currently available in vitro techniques and methods used for assessing the polymerization shrinkage. The focus lies on recent methods employing three-dimensional micro-CT data for the evaluation of polymerization shrinkage: volumetric measurement and the shrinkage vector evaluation through tracing particles before and after polymerization...
September 2016: Odontology
B A J A van Oirschot, E M Bronkhorst, J J J P van den Beucken, G J Meijer, J A Jansen, R Junker
The objectives of the current review were (1) to systematically appraise, and (2) to evaluate long-term success data of calcium phosphate (CaP) plasma-spray-coated dental implants in clinical trials with at least 5 years of follow-up. To describe the long-term efficacy of functional implants, the outcome variables were (a) percentage annual complication rate (ACR) and (b) cumulative success rate (CSR), as presented in the selected articles. The electronic search yielded 645 titles. On the basis of the inclusion criteria, 8 studies were finally included...
September 2016: Odontology
Jittima Pumklin, Kanokporn Bhalang, Prasit Pavasant
Oral infection is inflammatory disease caused by bacteria. A major component of gram negative bacteria membrane associated with inflammation is lipopolysaccharide (LPS). Currently, evidence presenting the combined effect of LPS and hypoxia to inflammatory response in human periodontal ligament cells (HPDLs) was yet lacking. Here, we studied whether the influence of oxygen on LPS-stimulated inflammatory cytokines in HPDLs. HPDLs were stimulated with LPS in normoxia and hypoxia for 24 h. The mRNA and protein expression of inflammatory cytokines were examined by polymerase chain reaction and enzyme-linked immunosorbent assay, respectively...
September 2016: Odontology
Susana Morimoto, Renata Aló Maluza Zanini, Josete Barbosa Cruz Meira, Carlos Martins Agra, Fernanda Calabró Calheiros, Denis Yudi Nagase
The aim of this study was to evaluate the influence of the physical assessment of different light-curing units from 55 dental offices on the irradiance and composite microhardness top/bottom ratio, and the influence of the radiometers for LED or QTH light sources on irradiance measurement. The irradiance of each light-curing unit was evaluated with two radiometers, either for LED or QTH light. A questionnaire regarding the type of source (LED or QTH), time of use, date of last maintenance and light-curing performance assessment applied...
September 2016: Odontology
Masanori Otake, Masayuki Kurose, Yoshiaki Uchida, Mana Hasegawa, Yoshiaki Yamada, Isao Saito, Kensuke Yamamura
The act of eating is a source of pleasure for people and is a major factor in maintaining a good quality of life. Several types of products for dysphagia patients are available to decrease aspiration of food that often accompanies daily food intake. The final goal of these products is to improve the ease of forming a food bolus and/or the safety of the swallowing process; however, tastes of products are not a major concern with initiation of swallowing. In the present study, we investigated the effect of bitter taste stimuli (quinine) and the combination of quinine and umami (monosodium glutamate: MSG) applied to the oropharynx on reflex swallows evoked by electrical stimulation to the oropharyngeal mucosa...
September 2016: Odontology
Hiroaki Suzuki, Yoshiaki Hata, Fumihiko Watanabe
The purpose of this study was to investigate the relationship between implant fracture under cyclic-fatigue loading at different embedding angles, embedding depths, and loading forces. Twenty-four cylinder-type implants 3.3 mm in diameter and 10 mm in length were used. Test specimens were 30 mm(3) resin blocks with one surfaces inclined at angles of either 5°, 10°, 15° and 20° and embedded vertically with implants at depths of either 5 or 10 mm to the these surfaces. A straight abutment was connected to the implant and cut to 5 mm in length, and a hemispherical crown 5 mm in diameter and 7 mm in length was cast with a 12 % gold-silver-palladium alloy and cemented onto the abutment...
September 2016: Odontology
Terumi Iwasaki, Yoshimori Uchikawa, Toshiomi Shirase
Although fluoride (F) products are widely used for caries prevention, the safest and most effective modes of application, in particular for young children, remain to be elucidated. The limitations associated with the detection of ultra-low F ion concentrations are the major obstacles in accurately assessing the salivary F ion concentrations in children. This study aimed to measure accurate salivary-free F ion concentrations in children using a flow-injection analysis device and highlight the conditions or substances that influence changes in salivary content...
September 2016: Odontology
Takuma Akimoto, Shuichi Hashimoto, Katsuhisa Sunada
Dexmedetomidine hydrochloride (DEX) is a α2-adrenergic receptor agonist that causes vasoconstriction by acting on α2B-adrenergic receptors in peripheral blood vessels. The authors aimed to determine the influence of DEX on tissue distribution, anesthetic action, and hemodynamic effects of lidocaine in rats. The investigators injected indigo carmine-containing (14)C-labeled lidocaine hydrochloride (2 %) without and with 3.1, 12.5, or 50 μg/mL DEX or 10 μg/mL epinephrine into the right palatal mucosa mesial to the maxillary first molar of specific pathogen-free male Wistar rats...
September 2016: Odontology
Sufyan Garoushi, Pekka Vallittu, Akikazu Shinya, Lippo Lassila
This study evaluated characteristics of light transmission, degree of monomer conversion and surface microhardness of bulk fill, conventional and fiber-reinforced resin based composites (RBCs) through different incremental thicknesses of resin composite. Working hypotheses was that there are differences in transmission of blue light through RBCs of different kinds and that the thickness of the increments influence the degree of monomer conversion of RBCs. Six bulk fill, three conventional nanohybrid, one short fiber reinforced and one flowable RBCs were evaluated...
September 2016: Odontology
Yoshiyuki Hagiwara, Tamotsu Uehara, Tatsuya Narita, Hirofumi Tsutsumi, Shinya Nakabayashi, Masao Araki
This study investigated the prevalence and distribution of anomalies of permanent dentition in the current Japanese population by examining an unbiased sample. We conducted a survey of dental anomalies by mass dental screening at eight high schools in 2012. Participants were all students with permanent dentition. Dental anomalies were classified as hypodontia, supernumerary teeth, peg-shaped teeth, fused teeth, and talon cusps. Students with one or more dental anomalies on oral examination were given a differential diagnosis by three specialists...
September 2016: Odontology
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