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https://www.readbyqxmd.com/read/28734165/rhodamine-spirolactam-sensors-operated-by-sulfur-cooperated-metal-complexation
#1
Gisuk Heo, Dahye Lee, Chi Gwan Kim, Jung Yun Do
New rhodamine Schiff base sensors were developed to improve selective sensing by introducing sulfide, ester, and dithiocarbonate groups, as well as using ketones coupled to rhodamine-hydrazine. Metal sensing proceeded through the 1:1 complexation of the metal ion for most sensors in the presence of Cu(2+) and Hg(2+). A sensor carrying a dithiocarbonate group responded selectively to Hg(2+) showing a strong colorimetric change and intense fluorescence. The association constants of the sensors were determined from a linear plot performed at micro-molar concentrations to afford values in the range of 10(4)...
July 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28734144/expression-of-planar-cell-polarity-genes-during-mouse-tooth-development
#2
Nobuko Obara, Yuko Suzuki, Kazuharu Irie, Shunichi Shibata
OBJECTIVE: Planar cell polarity (PCP) refers to the cell polarity across the tissue plane and controls various cell behaviors and structures. Although the expression of several PCP signaling components has been detected in tooth germs, knowledge of the gene expression patterns of these PCP components during tooth development remains incomplete. The aim of this study is to characterize the temporal and spatial changes in PCP gene expression during tooth development. DESIGN: Expression of Celsr1 and 2, Fzd3 and 6, Vangl1 and 2, and Dvl1-3 genes was analyzed in mouse molar germs from the bud to the bell stage using in situ hybridization...
July 14, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28732353/serum-insulin-like-growth-factor-1-and-its-binding-protein-3-as-prognostic-factors-for-the-incidence-progression-and-outcome-of-hepatocellular-carcinoma-a-systematic-review-and-meta-analysis
#3
Jing Wang, Yu-Chuan Li, Min Deng, Hai-Yin Jiang, Li-Hua Guo, Wen-Juan Zhou, Bing Ruan
PURPOSE: Previous studies have supported an association between serum insulin-like growth factor 1 (IGF1) and IGF-binding protein 3 (IGFBP3) levels and hepatocellular carcinoma (HCC), but the results were inaccurate. It has recently been proposed that IGF1 and IGFBP3 play roles in the time-to-progression (TTP) and overall survival (OS) of HCC patients. Our results revealed that serum IGF1 level is predictive of the progression and survival of HCC patients. RESULTS: HCC was associated with a significant reduction in serum IGF-1 and IGFBP-3 levels compared to cirrhosis (p = 0...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732220/short-term-evaluation-of-gustatory-changes-after-surgical-removal-of-mandibular-third-molar-a-prospective-randomized-control-trial
#4
D Prabhu Shankar, P Manodh, Pradeep Devadoss, Rahul Anand, Murugan Aparna
PURPOSE: The present study was carried out to prospectively determine the incidence and severity of suprathreshold taste changes after surgical removal of mandibular third molars. MATERIALS AND METHODS: Sixty patients who required removal of impacted third molars were included in the study. Based on the Winter criteria of angulation of impacted mandibular third molars, 15 patients each with mesioangular, distoangular, horizontal, and vertical impacted third molars were selected...
June 30, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28732182/stim1-regulates-enamel-mineralization-and-ameloblast-modulation
#5
Y Furukawa, N Haruyama, M Nikaido, M Nakanishi, N Ryu, M Oh-Hora, K Kuremoto, K Yoshizaki, Y Takano, I Takahashi
Loss-of-function mutations in the Ca(2+) release-activated Ca(2+) channel genes ORAI1 and STIM1 abolish store-operated Ca(2+) entry (SOCE) and result in ectodermal dysplasia with amelogenesis imperfecta. However, because of the limited availability of patient tissue, analyses of enamel mineralization or possible changes in ameloblast function or morphology have not been possible. Here, we generated mice with ectodermal tissue-specific deletion of Stim1 ( Stim1 cKO [conditional knockout]), Stim2 ( Stim2 cKO), and Stim1 and Stim2 ( Stim1/2 cKO) and analyzed their enamel phenotypes as compared with those of control ( Stim1/2(fl/fl)) animals...
July 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28732120/the-prevalence-of-molar-incisor-hypomineralization-evidence-from-70-studies
#6
Dongdong Zhao, Bao Dong, Dandan Yu, Qiongqiong Ren, Yehuan Sun
OBJECTIVE: A growing number of studies have investigated the prevalence of Molar Incisor Hypomineralization (MIH) around the world. The aim of this study was to systematically estimate the pooled prevalence of MIH. METHODS: A comprehensive literature research was completed in English and Chinese databases. Random effect models were used to calculate the pooled prevalence. To address the heterogeneity, meta-regression, and sensitivity analyzes were conducted. Publication bias was estimated by trim and fill method...
July 21, 2017: International Journal of Paediatric Dentistry
https://www.readbyqxmd.com/read/28731100/the-15-n-nmr-chemical-shift-in-the-characterization-of-weak-halogen-bonding-in-solution
#7
Sebastiaan B Hakkert, Jürgen Gräfenstein, Mate Erdelyi
We have studied the applicability of (15)N NMR spectroscopy in the characterization of the very weak halogen bonds of nonfluorinated halogen bond donors with a nitrogenous Lewis base in solution. The ability of the technique to detect the relative strength of iodine-, bromine- and chlorine-centered halogen bonds, as well as solvent and substituent effects was evaluated. Whereas computations on the DFT level indicate that (15)N NMR chemical shifts reflect the diamagnetic deshielding associated with the formation of a weak halogen bond, the experimentally observed chemical shift differences were on the edge of detectability due to the low molar fraction of halogen-bonded complexes in solution...
July 21, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28730236/root-fractures-epidemiological-clinical-and-radiographic-aspects
#8
Sanda Mihaela Popescu, Oana Andreea Diaconu, Monica Scrieciu, Iulia Roxana Marinescu, Emma Cristina Drăghici, Anca Gabriela Truşcă, Alexandra Carina Bănică, Mihaela Vătu, Veronica MercuŢ
Chronic root fractures are a relative frequent dental condition, occurring both in vital teeth and in teeth with root canal treatment, with a difficult and frustrating diagnosis. Two clinical forms are described: crown-root fractures with crown origin and vertical root fractures with root origin. The aim of the study was to determine the prevalence of the root fractured extracted teeth in two dental clinics with different profile [oral rehabilitation (OR) and endodontics (E)] and to present some particular aspects of the root fractures...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28729805/dental-treatment-considerations-for-a-pediatric-patient-with-incontinentia-pigmenti-bloch-sulzberger-syndrome
#9
Amy Yi-Ling Chen, Kevin Chen
Incontinentia pigmenti (IP) is a uncommon gene disorder, heritage with X-linked dominant mode. IP patients have a characteristic dentition varying from marked hypodontia to delayed eruption and conical crowns on both dentitions. A 5½-year-old girl, whose mother and younger sister were also diagnosed with IP, has the whirling-like pigmented skin lesion over her trunk and four extremities. Four primary teeth and multiple permanent tooth germs were found to be congenital missing. Dental considerations of further treatment were discussed with her parents including the preservation of primary molars, possible interim prosthesis in mixed or permanent dentition, full mouth rehabilitation with orthodontic and prosthodontic combined treatment, and implant therapy in adulthood...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28729804/a-case-of-tooth-fracture-occurred-upon-medicating-bisphosphonate-for-an-elderly-person-preservation-therapy-and-responses-for-stage-0-of-bisphosphonate-related-osteonecrosis-of-jaw
#10
Noriko Suzuki, Hitoshi Oguchi, Yu Yamauchi, Yasuyo Karube, Yukimi Suzuki, Noriyasu Hosoya
This case report aimed to report the progress of preservation therapy and response of symptoms and signs for Stage 0 of bisphosphonate-related osteonecrosis of jaw (BRONJ). A 68-year-old female was recognized having a tooth at the left upper first molar fracture upon medicating bisphosphonate (BP) in 2007. At that time, the extraction of the tooth was an absolute contraindication. Therefore, we performed preservation therapy. We observed the symptoms and signs every month. After 5 months, swelling and redness in the entire first molar tooth were seen and fistula formed partly...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28729802/size-discrepancies-in-molars-and-first-key-to-optimal-occlusion
#11
Ahmet Arif Celebi, Sam H Lee, Chung How Kau
OBJECTIVE: The aim of this research project was to determine whether the sizes of the first molars allow clinicians to achieve the first goal of an ideal clinical outcome. MATERIAL AND METHODS: Seventy-eight sets of dental casts that have been presented to the American Board of Orthodontics were evaluated. A Boley gauge was used to measure the length from the mesiobuccal cusp to the distobuccal cusp of the maxillary first molar and the length from the mesiobuccal groove of the mandibular first molar to the occlusal embrasure between the mandibular first and second molars...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28729796/effect-of-clasp-type-and-pullout-location-on-clasp-retention-in-different-environment-in-vitro-study
#12
Bilal Mourshed, Fuad Abdo Al-Sabri, Nashwan Ahmed Qaed, Nader Alaizari, Hashem Motahir Al-Shamiri, Amal Alfaqih
OBJECTIVE: The purpose of this study was to investigate the importance of pullout location and clasp types in two different environments to dislodge the clasp. MATERIALS AND METHODS: Mandibular test models with natural premolars and molar teeth were used to test four types of clasp (each 12) (Akers, Rest plate Akers, Half and Half, and Ring clasp) with three different pullout location for each type (ring on the rest, loop on the saddle, and wax arising from both rests) in dry and natural fresh saliva environment...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28729794/assessment-of-resin-dentin-interfacial-morphology-of-two-ethanol-based-universal-adhesives-a-scanning-electron-microscopy-study
#13
Mohamed Moustafa Awad
OBJECTIVE: The objective of this study was to assess the resin-dentin interfacial morphology created by two universal adhesives using scanning electron microscopy (SEM). MATERIALS AND METHODS: The occlusal surfaces of ten (n = 5) molars were reduced to expose a flat surface of dentin. Two universal adhesives, Scotchbond Universal Adhesive and Tetric N-Bond Universal, were independently applied to air-dried dentin. Light-cured resin-based composite restorative materials were used to incrementally build a composite "buildup...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28729787/patterns-of-dental-caries-among-school-children-assessed-using-caries-assessment-spectrum-and-treatment-tool
#14
Hisham El Batawi, Kausar Sadia Fakhruddin
OBJECTIVE: The present study aimed to assess and monitor patterns of dental caries among primary and permanent molars using Caries Assessment Spectrum and Treatment (CAST) index and to evaluate integration of CAST tool into patient health information (PHI) system of a Teaching Dental Hospital. MATERIALS AND METHODS: Dental records of n = 348 children, aged 7-9-years, attending University Dental Hospital Sharjah, for routine checkup and treatment as part of School Dental Program were assessed and translated into CAST codes...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28728965/survival-analysis-of-metal-crowns-versus-restorations-in-primary-mandibular-molars
#15
Gerardo Maupomé, Juan F Yepes, Madison Galloway, Qing Tang, George J Eckert, Timothy Downey, LaQuia Vinson
BACKGROUND: The effectiveness of stainless steel crowns (SSCs) versus direct restorations when placed in primary mandibular molars (teeth nos. L and S) is uncertain. The authors evaluated effectiveness by gauging longevity of treatment. METHODS: The authors obtained private dental insurance claims (2004-2016) from a national dental data warehouse. Paid insurance claims records (n = 1,323,489) included type of treating dentist, treatment placed, and patient age...
July 17, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28728750/trigeminocardiac-reflex-during-non-surgical-root-canal-treatment-of-teeth-with-irreversible-pulpitis
#16
James I-Sheng Huang, Hao-Hueng Chang, Chun-Pei Lin, Wan-Chuen Liao, Chia-Tze Kao, Tsui-Hsien Huang
BACKGROUND/PURPOSE: Trigeminocardiac reflex (TCR) is a unique clinical incident of acute change in hemodynamic balance, which may lead to hypotension, bradycardia, and even clinical crisis. Up to date, no study so far considers the impact of non-surgical root canal treatment (NSRCT) of irreversible pulpitis teeth under either local infiltration or block anesthesia on hemodynamic change possibly related to TCR. METHODS: This study enrolled 111 patients with 138 irreversible pulpitis teeth that were treated by two sessions of NSRCT...
July 17, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28727471/cutting-edge-implant-rehabilitation-design-and-management-a-tapered-abutment-approach
#17
Mark Bishara, Gregori M Kurtzman
Immediate implant placement can pose challenges surgically and, ultimately, restoratively. Yet immediate placement has become the standard when adequate bone is present to achieve primary stability and site infection is minimal. To avoid prosthetic complications and ensure the implant is encased in bone after healing, proper planning must consider that implant placement does not necessarily need to follow the trajectory of the root socket. As discussed in this article, maxillary anterior sites have potential issues related to the "triangle of bone" that are not encountered in molar sites and demand different approaches to ensure treatment success...
July 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28727469/bilateral-maxillary-paramolars-in-an-adolescent
#18
Preetika Chandna, Nikhil Srivastava, Vivek K Adlakha, Vrinda Sharma
Paramolars are relatively uncommon supernumerary molars. Limited cases of bilateral maxillary or mandibular paramolars have been reported. This case report describes bilateral maxillary premolars and their management in a 15-year-old girl, whose chief complaint was food lodgment in these regions. After a diagnosis of bilateral maxillary premolars was made and confirmed by orthopantomogram, both of the paramolars were extracted.
July 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28727415/hydrophobic-nanosized-all-silica-beta-zeolite-efficient-synthesis-and-adsorption-application
#19
Zhiguo Zhu, Hao Xu, Jingang Jiang, Hai-Hong Wu, Peng Wu
All-silica Beta zeolite, synthesized by conventional hydroxide route, usually possesses small crystal size of a few hundred nanometers but poor hydrophobicity, whereas the fluoride-mediated one exhibits to be highly hydrophobic but microsized. To obtain nanosized all-silica Beta zeolite with excellent hydrophobicity, an innovative and efficient hydrothermal route via interzeolite transformation for synthesizing all-silica Beta zeolite is proposed in present study. With the assistance of Beta seeds and tetraethylammonium hydroxide as the structure-directing agent, siliceous Beta zeolite is well crystallized at a high solid yield via dissolution-recrystallization of all-silica ITQ-1 crystals at an extremely low water content (H2O/SiO2 molar ratio of 1)...
July 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28727163/dental-erosion-among-south-brazilian-adolescents-a-2-5-year-longitudinal-study
#20
C D Brusius, L S Alves, C Susin, M Maltz
OBJECTIVES: This population-based longitudinal study investigated the incidence, progression and risk factors for dental erosion among South Brazilian adolescents. METHODS: Eight hundred and one schoolchildren attending 42 public and private schools were clinically examined at 12 years of age; clinical examinations were repeated after 2.5 years (SD=0.3). After tooth cleaning and drying, permanent incisors and first molars were classified using the Basic Erosive Wear Examination (BEWE) scoring criteria...
July 20, 2017: Community Dentistry and Oral Epidemiology
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