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Odontology

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https://www.readbyqxmd.com/read/29777391/shaping-ability-of-reciprocating-single-file-systems-in-severely-curved-canals-waveone-and-reciproc-versus-waveone-gold-and-reciproc-blue
#1
Sebastian Bürklein, Stefanie Flüch, Edgar Schäfer
The aim was to compare the canal straightening of M-wire [Reciproc (VDW, Munich, Germany) and WaveOne (Dentsply Maillefer, Ballaigues, Switzerland)] and gold- and blue-wire heat-treated [Reciproc blue (VDW) and WaveOne Gold (Dentsply Maillefer)] instruments in severely curved root canals. A total of 80 root canals in extracted human teeth with angles of curvatures ranging between 25° and 35° and radii ranging between 3.1 and 8.5 mm were divided into four groups (n = 20). Based on radiographs taken prior to instrumentation, the groups were balanced with respect to the angle and the radius of canal curvature (P = 1...
May 18, 2018: Odontology
https://www.readbyqxmd.com/read/29752597/the-higher-prevalence-of-developmental-defects-of-enamel-in-the-dioxin-affected-region-than-non-dioxin-affected-region-result-from-a-cross-sectional-study-in-vietnam
#2
Vo Truong Nhu Ngoc, Le Thi Huong, Bui Van Nhon, Ngo Thi Minh Tan, Pham Van Thuc, Vo Thi Thu Hien, Truong Manh Dung, Ngo Van Toan, Le Quynh Anh, Le Hoang Son, Thien Chu-Dinh, Dinh-Toi Chu
Developmental defects of enamel (DDE) are induced and regulated by several factors including genetics and the environment. There is evidence showing that dioxin in polluted areas has a strong effect on the health and development of teeth. However, there has been no study on DDE in the dioxin-affected regions in Vietnam. To identify the effect of dioxin on the prevalence of DDE in studied areas in Vietnam, a cross-sectional study was conducted in 2200 adults in the A Luoi district in the Thua Thien Hue province (the dioxin-affected region) and in the Kim Bang district in the Ha Nam province (dioxin-unaffected region) in 2015...
May 11, 2018: Odontology
https://www.readbyqxmd.com/read/29713913/osteonecrosis-of-the-jaw-in-patients-transitioning-from-bisphosphonates-to-denosumab-treatment-for-osteoporosis
#3
P J Voss, D Steybe, P Poxleitner, R Schmelzeisen, C Munzenmayer, H Fuellgraf, A Stricker, W Semper-Hogg
Antiresorptive-related osteonecrosis of the jaw (ARONJ) is a rare but severe side effect of antiresorptive treatment with bisphosphonates or RANKL-antibody denosumab in patients with malignant diseases or osteoporosis. Whilst osteonecrosis of the jaw (ONJ) related to the administration of bisphosphonates (BPs) has been investigated for more than 1 decade now, only few data are available on denosumab-related ONJ, especially in patients with osteoporosis. From 2008 to 2016, 52 osteoporosis patients were treated with ARONJ in the Department of Oral and Maxillofacial Surgery, University Medical Center Freiburg, Germany...
April 30, 2018: Odontology
https://www.readbyqxmd.com/read/29704075/influence-of-fluoride-varnish-on-shear-bond-strength-of-a-universal-adhesive-on-intact-and-demineralized-enamel
#4
Antonio José Ortiz-Ruiz, Iban Jesús Muñoz-Gómez, Ana Pérez-Pardo, Concepción Germán-Cecilia, Yolanda Martínez-Beneyto, Ascensión Vicente
The aim was to evaluate the effect of fluoride varnish on the shear bond strength (SBS) on polished and non-polished intact and demineralized enamel. Bovine incisors (half demineralized) were used. Bifluorid 12™ was applied. Bonding was made with Futurabond® M + and GrandioSO, 24 h and 7 days after varnishing. In some groups, varnish was removed by polishing before bonding. SBS was measured. Fracture type was determined by stereomicroscopy and scanning electron microscope (SEM) observations of the enamel surface were made...
April 27, 2018: Odontology
https://www.readbyqxmd.com/read/29687274/comparison-of-two-color-difference-formulas-using-the-bland-altman-approach-based-on-gingiva-color-space
#5
Cristina Gómez Polo, Javier Montero, Ana Maria Martín Casado
The objectives of this study were to determine the relationship between the results provided by the classical CIELab (ΔE ab *) and the CIEDE2000 (ΔE00) formulas and the gingival color space using the Bland and Altman limits of agreement, to use this relationship to establish the equivalences between the gingival color thresholds of perceptibility of both formulas, and to evaluate whether the relationship between ΔE ab * and ΔE00 is modified depending on the axis in which the changes occur. The means of the L*, a*, and b* coordinates of the 21 gingiva porcelain samples (Heraceram, Heraeus Kulzer Mitsui Chemical Groups) were used and the differences in color were calculated in 210 pairs of samples using the CIELab (ΔE*ab) and CIEDE2000 (ΔE00) color-difference formulas...
April 23, 2018: Odontology
https://www.readbyqxmd.com/read/29651668/effect-of-chitosan-nanoparticle-qmix-and-edta-on-totalfill-bc-sealers-dentinal-tubule-penetration-a-confocal-laser-scanning-microscopy-study
#6
Zeliha Uğur Aydın, Taha Özyürek, Büşra Keskin, Talat Baran
The aim of the present study was to compare the effect of chitosan nanoparticle, QMix, and 17% EDTA on the penetrability of a calcium silicate-based sealer into dentinal tubules using a confocal laser scanning microscope (CLSM). Sixty mandibular premolar teeth were selected and randomly divided into three groups (n = 20) before root canal preparation according to the solution used in the final rinse protocol: chitosan, QMix, and EDTA groups. Twenty teeth of each group were filled with a TotalFill BC sealers' single gutta-percha cone and with 0...
April 12, 2018: Odontology
https://www.readbyqxmd.com/read/29651667/association-between-periodontitis-and-chronic-migraine-a-case-control-study
#7
Pablo Ameijeira, Yago Leira, Clara Domínguez, Rogelio Leira, Juan Blanco
The aim of this investigation was to examine whether chronic periodontitis (CP) is a risk indicator of chronic migraine (CM). We performed a case-control study consisted of 102 cases (patients diagnosed with CM) and 91 controls (non-CM individuals) matched by age and gender. Full-mouth periodontal charts, demographic, medical, clinical, as well as neurological data were obtained. In addition, high sensitive C-reactive protein serum levels were determined from blood samples of both cases (taken during migraine interictal period) and controls...
April 12, 2018: Odontology
https://www.readbyqxmd.com/read/29644480/correction-to-microleakage-in-class-v-composite-and-compomer-restorations-following-exposure-to-a-colutory-prescribed-for-the-treatment-of-xerostomy
#8
Ascensión Vicente, Antonio J Ortiz, Pablo L Parra, José L Calvo-Guirado, Fernando Chiva
In the original publication of the article, one of the author names was published incorrectly as José L. Calvo. The correct name is José L. Calvo-Guirado.
April 11, 2018: Odontology
https://www.readbyqxmd.com/read/29623518/influence-of-a-preventive-program-on-the-oral-health-related-quality-of-life-ohrqol-of-european-pregnant-women-a-cohort-study
#9
Yolanda Martínez-Beneyto, Javier Montero-Martin, Francisco Garcia-Navas, Ascension Vicente-Hernandez, Antonio Jose Ortiz-Ruiz, Fabio Camacho-Alonso
The aim of this study was to compare the impact of oral health on quality of life of a group of pregnant women enrolled in a program of oral health with respect to a control group of non-pregnant women. A cross-sectional study involving a sociodental indicator OHIP-14 and a dental examination was completed to assess pregnant women's knowledge of oral health, hygienic habits, periodontal and caries index. Data were collected from 113 pregnant women and 113 non-pregnant women. Sociodemographic data for both groups were homogeneous...
April 6, 2018: Odontology
https://www.readbyqxmd.com/read/29594827/cytotoxic-and-biological-effects-of-bulk-fill-composites-on-rat-cortical-neuron-cells
#10
Hakan Kamalak, Aliye Kamalak, Ali Taghizadehghalehjoughi, Ahmet Hacımüftüoğlu, Kemal Alp Nalcı
The aim of this study was to investigate potential cellular responses and biological effects of new generation dental composites on cortical neuron cells in two different exposure times. The study group included five different bulk-fill flow able composites; Surefil SDR Flow, X-tra Base Flow, Venus Bulk Flow, Filtek Bulk Flow and Tetric-Evo Flow. They were filled in Teflon molds (Height: 4 mm, Width: 6 mm) and irradiated for 20 s. Cortical neuron cells were inoculated into 24-well plates. After 80% of the wells were coated, the 3 µm membrane was inserted and dental filling materials were added...
March 28, 2018: Odontology
https://www.readbyqxmd.com/read/29594826/sodium-hypochlorite-penetration-into-dentinal-tubules-after-manual-dynamic-agitation-and-ultrasonic-activation-a-histochemical-evaluation
#11
Luigi Generali, Erica Campolongo, Ugo Consolo, Carlo Bertoldi, Luciano Giardino, Francesco Cavani
The aim of this study was to compare the effects of Manual Dynamic Agitation and Passive Ultrasonic Irrigation on sodium hypochlorite (NaOCl) penetration into dentinal tubules using its bleaching ability. Thirty-four single-rooted teeth with round-shaped root canals were distributed in two homogeneous groups and one control group, characterized by different NaOCl activation systems: Manual Dynamic Agitation and Passive Ultrasonic Irrigation. After instrumentation, all root canals were stained with 10% copper sulphate solution followed by 1% rubeanic acid alcohol solution under vacuum...
March 28, 2018: Odontology
https://www.readbyqxmd.com/read/29557992/comparison-of-three-block-bone-substitutes-for-bone-regeneration-long-term-observation-in-the-beagle-dog
#12
Kosaku Sawada, Ken Nakahara, Maiko Haga-Tsujimura, Tateyuki Iizuka, Masako Fujioka-Kobayashi, Kensuke Igarashi, Nikola Saulacic
This study aimed to evaluate the impact of three types of block bone substitute material on bone formation and graft resorption in vivo. Standardized bone defects (n = 4 defects/animal) were created in the calvaria of nine dogs. Block bone substitutes made of deproteinized bovine bone mineral (DBBM), beta-tricalcium phosphate (β-TCP) and a mixture alpha-TCP and hydroxyapatite (α-TCP/HA) were inserted into the bone defects. A fourth defect was left untreated (empty). All sites were covered with a collagenous membrane...
March 20, 2018: Odontology
https://www.readbyqxmd.com/read/29556861/evaluation-of-calcium-and-magnesium-contents-in-tooth-enamel-without-any-pathological-changes-in-vitro-preliminary-study
#13
Elzbieta Klimuszko, Karolina Orywal, Teresa Sierpinska, Jarosław Sidun, Maria Golebiewska
Enamel is the structure that covers the entire clinical crown of a tooth. It enables to chew and crush food, and gives a final shape to the crowns of teeth. To evaluate calcium and magnesium contents in tooth enamel and analyse relationships between the study minerals extracted human permanent teeth were cut at every 150 microns and subjected into acid biopsy. The amounts of calcium and magnesium were assessed in the laboratory using atomic absorption spectroscopy with an air/acetylene flame. The lowest calcium and magnesium contents were found on the enamel surface of the teeth...
March 19, 2018: Odontology
https://www.readbyqxmd.com/read/29497867/relapse-after-le-fort-i-surgery-in-oral-cleft-patients-a-2-year-follow-up-using-digitized-and-3d-models
#14
Willian Saranholi da Silva, Ana Lúcia Pompéia Fraga de Almeida, Maria Giulia Rezende Pucciarelli, Karin Hermana Neppelenbroek, Juliana Dreyer da Silva de Menezes, Renato Yassutaka Faria Yaedú, Thais Marchini Oliveira, Flavia M R N Cintra, Simone Soares
This retrospective observational study aimed to evaluate and identify the relapse rate after orthognathic surgery for maxillary advancement (Le Fort I maxillary osteotomy) in oral cleft patients through digitized cephalograms and 3D dental models, following 2 years. Lateral cephalograms and dental casts of 17 individuals, enrolled in Orthodontics Department in Hospital of Rehabilitation of Craniofacial Anomalies, were carried out. The digital cephalometric tracings were evaluated in: T1-before surgery, T2-immediate after surgery, T3-6-month to 1-year after surgery...
March 1, 2018: Odontology
https://www.readbyqxmd.com/read/29274049/correction-to-expression-of-optineurin-isolated-from-rat-injured-dental-pulp-and-the-effects-on-inflammatory-signals-in-normal-rat-kidney-cells
#15
Kyoko Senoo, Keisuke Yamashiro, Tadashi Yamamoto, Fumio Myokai, Mari Kawamura, Shogo Takashiba
In the original publication of the article, one of the author name was published incorrectly as "Keisuke Yamashairo" and correct name should be "Keisuke Yamashiro".
April 2018: Odontology
https://www.readbyqxmd.com/read/29243187/bonding-performance-of-self-adhesive-flowable-composites-to-enamel-dentin-and-a-nano-hybrid-composite
#16
Jana Peterson, Marta Rizk, Monika Hoch, Annette Wiegand
This study aimed to analyze bond strengths of self-adhesive flowable composites on enamel, dentin and nano-hybrid composite. Enamel, dentin and nano-hybrid composite (Venus Diamond, Heraeus Kulzer, Germany) specimens were prepared. Three self-adhesive composites (Constic, DMG, Germany; Fusio Liquid Dentin, Pentron Clinical, USA; Vertise Flow, Kerr Dental, Italy) or a conventional flowable composite (Venus Diamond Flow, Heraeus Kulzer, Germany, etch&rinse technique) were applied to enamel and dentin. Nano-hybrid composite specimens were initially aged by thermal cycling (5000 cycles, 5-55 °C)...
April 2018: Odontology
https://www.readbyqxmd.com/read/29243185/effect-of-fiber-post-length-and-abutment-height-on-fracture-resistance-of-endodontically-treated-premolars-prepared-for-zirconia-crowns
#17
Jie Lin, Jukka Pekka Matinlinna, Akikazu Shinya, Michael George Botelho, Zhiqiang Zheng
The purpose of this study was to compare the fracture resistance, mode of fracture, and stress distribution of endodontically treated teeth prepared with three different fiber post lengths and two different abutment heights, using both experimental and finite element (FE) approaches. Forty-eight human maxillary premolars with two roots were selected and endodontically treated. The teeth were randomly distributed into six equally sized groups (n = 8) with different combinations of post lengths (7.5, 11, and 15 mm) and abutment heights (3 and 5 mm)...
April 2018: Odontology
https://www.readbyqxmd.com/read/29243183/effects-of-experimental-periodontitis-on-the-metabolic-system-in-rats-with-diet-induced-obesity-dio-an-analysis-of-serum-biochemical-parameters
#18
Ryutaro Kuraji, Miyako Fujita, Hiroshi Ito, Shuichi Hashimoto, Yukihiro Numabe
Recent studies have shown that periodontitis accelerates the progression of obesity-associated metabolic diseases. Thus, we examined the influence of periodontitis on serum biochemical parameters of metabolic disease in a diet-induced obesity (DIO) rat. First, we established the DIO model using ten male rats fed with either basal diet (lean group) or high-fat diet (DIO group) for 12 weeks. Second, to examine the interaction between periodontitis and obesity, we divided 24 DIO rats into the following four groups...
April 2018: Odontology
https://www.readbyqxmd.com/read/29243182/the-facial-nerve-anatomy-and-associated-disorders-for-oral-health-professionals
#19
Kojiro Takezawa, Grant Townsend, Mounir Ghabriel
The facial nerve, the seventh cranial nerve, is of great clinical significance to oral health professionals. Most published literature either addresses the central connections of the nerve or its peripheral distribution but few integrate both of these components and also highlight the main disorders affecting the nerve that have clinical implications in dentistry. The aim of the current study is to provide a comprehensive description of the facial nerve. Multiple aspects of the facial nerve are discussed and integrated, including its neuroanatomy, functional anatomy, gross anatomy, clinical problems that may involve the nerve, and the use of detailed anatomical knowledge in the diagnosis of the site of facial nerve lesion in clinical neurology...
April 2018: Odontology
https://www.readbyqxmd.com/read/29071451/effect-of-antimicrobial-photodynamic-therapy-apdt-on-the-sterilization-of-infected-dentin-in-vitro
#20
Yuta Nagai, Anri Suzuki, Hiroaki Katsuragi, Koichi Shinkai
The aim of this study was to evaluate the bactericidal effect of antimicrobial photodynamic therapy (aPDT) on an infected dentin model. Dentin plates were prepared from extracted human molars and infected through immersion in a solution of Streptococcus mutans. The nine experimental groups consisted of two laser irradiation groups (650 nm laser: 650 laser and 940 nm laser: 940 laser), two photosensitizer groups (methylene blue: MB, and azulenocyanine: Azc), four aPDT groups (650 nm laser irradiation of MB: 650 laser-MB, 650 nm laser irradiation of Azc: 650 laser-Azc, 940 nm laser irradiation of MB: 940 laser-MB and 940 nm laser irradiation of Azc: 940 laser-Azc) and a control...
April 2018: Odontology
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