bluuebunny/crossref_metadata_2025_split huggingface dataset:
In vitro comparative evaluation of different storage media (hank's balanced salt solution, propolis, Aloe vera, and pomegranate juice) for preservation of avulsed tooth
Authors: Babaji Prashant , Melkundi Mahesh , Devanna Raghu , S. Suresh B. , Chaurasia Vishwajit Rampratap , V. Gopinath P. 
Published: March 2017

ABSTRACT
Objectives: Prognosis of the avulsed teeth is mostly affected by extraoral dry period and storage medium used to store teeth before reimplantation. However, ability of storage media can affect cell viability and success of treatment. Various storage media were tried with some success. The present study was undertaken to comparatively evaluate the efficacy of hank's balanced salt solution (HBSS), propolis, Aloe vera, and pomegranate juice (PJ) in preserving the vitality of periodontal ligament (PDL) cells of avulsed teeth. Materials and Methods: Fifty orthodontically extracted sound teeth with healthy PDL were selected for the present study. Selected teeth were randomly divided into study groups (10 in each) and 5 each as positive and negative control groups. All the teeth were immersed immediately after extraction into respective storage media. Data were statistically analyzed using IBM SPSS software for Windows, Version 19.0., IBM Corp., Armonk, NY, USA. Analysis of variance and multiple range were done using Tukey's honestly significant difference with level of significance at 5% (P > 0.05). Results: Propolis (285,000 viable cells with standard deviation 4.11028 and standard error of 1.38097) showed more viable PDL cells followed by HBSS, A. vera, and PJ. Conclusion: Propolis, A. vera, and PJ can be used as an alternative tooth storage media.
Histologic evaluation of the effect of mineral trioxide aggregate-Fillapex as a root canal sealer in rat teeth submitted to late replantation
Authors: Ferreira Manuel Marques , Botelho Maria Filomena , Abrantes Margarida , Carvalho Lina , Carrilho Eunice 
Published: March 2017

ABSTRACT
Objective: This study aims to analyze the effect of new root canal based silicate cement, in rat teeth after late replantation, comparing with calcium hydroxide (CH) in preventing tooth root resorption. Materials and Methods:The study group included 16 Wistar rats in which the upper right central incisors were extracted and were left on a worktable for 60 min, simulating a case of tooth avulsion, after had been anesthetized. One group, (Group I), the canals were filled with CH past, before replantation. The second groups of teeth, (Group II), the canals were filled with mineral trioxide aggregate-Fillapex (MTAF). After removal, the blood clot of the socket, with saline solution irrigation, the teeth were replanted into their original socket, and splinted with silk 3/0. The rats were sacrificed 8 weeks after replantation and the specimens were prepared for histologic and histomorphometric analyses. The areas of inflammatory and replacement resorptions were selected and quantified. These data for each group of teeth were evaluated and analyzed using the Mann–Whitney test (P = 0.05). Result and Conclusion: All the replanted teeth in both groups survived. Although root canal filled with MTAF provide better results than with CH past concerning inflammatory and replacement resorption, there was no statistical difference (P = 0.527).
Comparative evaluation of antimicrobial efficacy of triple antibiotic paste, calcium hydroxide, and a proton pump inhibitor against resistant root canal pathogens
Authors: Mehta Shibha , Verma Promila , Tikku Aseem Prakash , Chandra Anil , Bains Rhythm , Banerjee Gopa 
Published: March 2017

ABSTRACT
Objective: The objective of this study is to compare the antimicrobial efficacy of triple antibiotic paste (TAP) and a proton pump inhibitor (PPI) (omeprazole) in combination with calcium hydroxide (CH) against Enterococcus faecalis and Candida albicans. Materials and Methods: E. faecalis and C. albicans were subcultured and inoculated at 37° overnight and were treated with different dilutions of TAP, 25 μg/ml (Group 1), CH (Group 2, control), CH 16 mg/ml + omeprazole 2 mg/ml (Group 3a) (CH 16 mg/ml + omeprazole 4 mg)/ml (Group 3b) for 24, 48, and 72 h in sterile uncoated 96-well microtiter plates. Minimum concentration at which the medicaments produced least optical density was determined using ELISA reader (ELx 808 BioTek Inc., USA) device set at optical density of 630 nm. Results were analyzed statistically by one-way analysis of variance followed by Tukey's multiple comparison tests. The significance level was set at 0.05. Results: Mean concentration (irrespective of time) for TAP at which mean minimum optical density was recorded at 1.25 μg/ml (1:20 dilution) and 25 μg/ml (0 dilution) against E. faecalis and C. albicans, respectively. Least optical density for CH plus PPI group was obtained 1.6 μg/ml (1:10 dilution) and 16 μg/ml (0 dilution) for E. faecalis and C. albicans, respectively. However, CH alone showed a weaker antimicrobial action against either of the strains even at full concentration. Conclusions: PPI enhanced the antibacterial efficacy of CH against E. faecalis and C. albicans. However, TAP showed the best antibacterial property followed by CH plus PPIs against both the selected strains.
The confidence of undergraduate dental students in Saudi Arabia in performing endodontic treatment
Authors: Alrahabi Mothanna 
Published: March 2017

ABSTRACT
Objective: This study examined the endodontic experience, perceptions of endodontic practice, and self-rated confidence of dental students enrolled in Taibah University, Saudi Arabia. Materials and Methods: A questionnaire was distributed to 41 undergraduate dental students registered in endodontic courses in the 2015 academic year. The questionnaire evaluated their confidence performing nonsurgical root canal treatment. The level of confidence was classified using a 5-point scale as “very confident,” “confident,” “neutral,” “not very confident,” or “not at all confident.” The data were analyzed using SPSS version 20.0 (SPSS, Chicago, IL, USA). Results: The participation rate was 93%. The maxillary incisor was the most common first tooth treated. The students were relatively confident, but their confidence levels were lower regarding endodontic radiology, evaluation of root canal obturation, and determining the correct recall period for the patient. Conclusion: The confidence of undergraduates in endodontics must be enhanced to increase their clinical competence when performing root canal treatment.
Spatial analysis of mandibular condyles in patients with temporomandibular disorders and normal controls using cone beam computed tomography
Authors: Al-Rawi Natheer Hashim , Uthman Asmaa Tahseen , Sodeify Sahar M. 
Published: March 2017

ABSTRACT
Objectives: The aim of the study is to investigate the condylar position and its relation to articular eminence and axial condylar angle in temporomandibular joint disorder (TMD) patients and in normal controls using cone beam computed tomography (CBCT). Materials and Methods: CBCT temporomandibular joint (TMJ) images of 70 participants (38 males and 32 females, mean age 26.4 years) were analyzed. They were divided into control group (including 35 subjects) and study group (including 35 subjects). Linear measurements of joint space and condyle determined the condylar position of each TMJ. Articular eminence height and inclination were also measured with axial condylar angle to determine its relation to condylar position. Independent and paired sample t-test was applied to compare between the groups and TMJ sides of the same group at significance level of 0.05. Results: Statistical significant differences were found between males and females of both groups regarding superior joint space (SJS), lateral joint space, A-P, and M-L condyle distance (P < 0.05). SJS, medial joint space (MJS), and eminence angle were greater (P < 0.01) in male's joints with TMD with flatter axial condylar angle (P < 0.05), when compared with normal TMJ counterpart. Females TMJs showed significantly higher values of MJS of affected side when compared with normal counterpart with flatter axial condylar angle (P < 0.05). Conclusion: Superior and MJS parameters were the ones that showed significant differences between affected and nonaffected joints. The mean axial condylar angle was smaller in joints with abnormal TMJ. This indicates that the condyles of the affected joints may rotate inward.
Knowledge, attitude, and practice of pediatricians regarding pediatric liquid medicaments
Authors: Girish Babu K. L. , Doddamani Geeta Maruti , L.R Kumaraswamy Naik 
Published: March 2017

ABSTRACT
Objective:To assess the knowledge, attitude, and practice of pediatricians regarding pediatric liquid medicaments (PLMs) and its effect on dental health.Materials and Methods: A convenience sample of 103 pediatricians was asked to answer a questionnaire.Results: A total number of 87 pediatricians completed the questionnaires. They considered age and body weight of the child (58%), cost of the medicine (40%), and pharmaceutical company (37%) to be relevant while prescribing. Eighty-eight percent of pediatricians knew that the PLM was sweet in nature. Sixty-seven percent of pediatricians stated that pH of PLM is responsible for deleterious effect on teeth. Seventy-two percent of pediatricians were aware of hidden sugars present in PLM. Only 48% of pediatricians were aware of availability of sugar-free medicine. Seventy percent of pediatricians were of the opinion that sugar-free medicine is not as sweet as sugar-containing medicines and is more expensive (65%).Conclusion: Knowledge, attitude, and practice of pediatricians regarding PLMs and its effect on dental health were not satisfactory.
Effect of cleaning agent, primer application and their combination on the bond strength of a resin cement to two yttrium-tetragonal zirconia polycrystal zirconia ceramics
Authors: Negreiros William Matthew , Ambrosano Glaucia Maria Bovi , Giannini Marcelo 
Published: March 2017

ABSTRACT
Objective: The objective of this study is to evaluate the effect of a cleaning agent and priming on the bond strength (BS) of a resin cement (RC) to zirconia ceramics after 24 h and 1 year of water-storage. Materials and Methods: Fifty-six Katana and 56 ZirCAD zirconia ceramic plates were prepared and each zirconia brand was divided into four groups (n = 14): (1) untreated; (2) treated with Ivoclean cleaning agent; (3) treated with Monobond Plus coupling agent; (4) treated with Ivoclean + Monobond Plus. Cleaning and coupling agents were applied to zirconia following the manufacturers' instructions. The RC was manipulated, inserted into tubes (0.75 mm diameter/1 mm height) that were positioned on the zirconia surfaces and light activated. Specimens were tested after 24 h and 1 year of water storage. A shear load was applied to the base of the RC cylinders (until failure. Data were analyzed by three-way ANOVA and Tukey tests (α = 5%). Results: No significant difference in BS was noted between zirconia ceramics, except when the combination of cleaning and coupling agents was used. This combination increased the BS for Katana zirconia. One year of water storage leads to a decrease in BS for all experimental groups. Conclusion: The combination of cleaning agent and priming can yield higher BS for Katana at 24 h. BS to zirconia ceramics reduced approximately 50% after 1 year.
Comparative clinical efficacy of three toothpastes in the control of supragingival calculus formation
Authors: Kraivaphan Petcharat , Amornchat Cholticha 
Published: March 2017

ABSTRACT
Objectives: The purpose of this double-blind, parallel clinical study was to assess clinical efficacy in supragingival calculus formation reduction using Abhaibhubejhr Herbal Toothpaste compared to Colgate Total and Colgate Cavity Protection toothpastes. Materials and Methods: A total of 150 subjects participated in the pretest phase. All subjects were given oral soft/hard tissue evaluation, calculus examination using Volpe-Manhold calculus, and whole mouth oral prophylaxis. They received noncalculus control fluoride toothpaste and a soft-bristled toothbrush to brush for 1 min two times daily for 8 weeks. After which, subjects were given a test phase oral soft/hard tissue evaluation and calculus examination and were randomized into one of the three toothpaste groups. All subjects in the test phase received a whole mouth oral prophylaxis and were given their assigned toothpaste and a soft-bristled toothbrush to brush for 1 min two times a day for 12 weeks. Thereafter, subjects were assessed for their oral soft/hard tissue and calculus formation. Results: Mean Volpe-Manhold calculus index scores for the Cavity Protection, Abhaibhubejhr, and Total toothpaste groups were 0.78, 0.62, and 0.48, respectively, at the 12-week test phase evaluation. Abhaibhubejhr and Total toothpaste groups show 20.51% and 38.46% significantly less calculus formation than the Cavity Protection toothpaste group (P < 0.05). Total toothpaste group also show 22.58% significantly less calculus formation than the Abhaibhubejhr toothpaste group (P < 0.05). Conclusion: The use of Colgate Total toothpaste over a 12-week period was clinically more effective than either Abhaibhubejhr or Colgate Cavity Protection toothpastes in controlling supragingival calculus formation.
Awareness about the effects of tobacco consumption on oral health and the possibility of smoking behavior among male Saudi schoolchildren
Authors: Ashraf Nazir Muhammad , Almas Khalid 
Published: March 2017

ABSTRACT
Objective: To investigate an association between the awareness about the effects of tobacco consumption on oral health and the likelihood of smoking among male schoolchildren. Materials and Methods: A cross sectional study was conducted using a multistage random sampling technique. The participants (ages 15–19 years) were recruited from male public high schools in Greater Dammam in Saudi Arabia. A pretested questionnaire inquired participants’ awareness about the effects of smoking on oral health. SPSS (Released 2013, IBM SPSS Statistics for Windows, Version 22.0. Armonk, NY: IBM Corp) was used to calculate unadjusted and adjusted odds ratio (OR) and 95% confidence interval (CI). Multiple logistic regression and interaction analyses were performed to identify the factors associated with the probability of smoking behavior among children. Results: More than 69.9% (n = 277) of participants were aware of the adverse effects of tobacco consumption on oral health which included poor oral health, bad taste and breath, periodontal disease, dental caries, oral ulcers, and oral cancers. The odds of smoking were 22%–47% lower among schoolchildren who were aware of the consequences of smoking on oral health than those who were unaware of these complications. The students who believed that smoking can cause oral ulcers and negatively affects oral health had a lower probability of smoking (OR: 0.414; CI: 0.201–0.50) and (OR: 0.433; CI: 0.194–0.965), respectively in comparison with those who thought that smoking had no such negative impacts. Conclusions: Schoolchildren with increased awareness of smoking effects on oral health were less likely to smoke. Educating students about the complications of smoking on oral health should be the part of smoking cessation programs and policies.
Frequency of impacted teeth and categorization of impacted canines: A retrospective radiographic study using orthopantomograms
Authors: Al-Zoubi Hassan , Alharbi Abdulgader Abdullatif , Ferguson Donald J. , Zafar Muhammad Sohail 
Published: March 2017

ABSTRACT
Objective: The objective of this study is to determine the frequency of impacted maxillary canines using seven subtype classification system. For this purpose, impacted maxillary canines have been divided into seven various subtypes. Materials and Methods: This is a descriptive, cross-sectional, and retrospective study conducted using radiographic data of residents of Madinah, Al Munawwarah. Radiographic data of 14,000 patients, who attended College of Dentistry, Taibah University, from January 2011 to February 2015, were screened against the selection criteria for the presence of impacted teeth. The individuals with maxillary impacted canines were matched to maxillary canine impaction. The occurrence of each subtype of impacted canines was calculated. Results: Impacted teeth are more common in the maxilla compared to mandible. The impacted canine represented the highest proportion of all impacted maxillary teeth followed by the second premolars and the central incisors. According to the classification system represented, Type II of canine impaction comprised the highest proportion (51%) while Type IV (0.5%) comprised the lowest frequency. The maxillary canine is the most frequently impacted tooth followed by mandibular canines. Conclusions: Although there are many variations, the majority of impacted canines fall into Type II of the classification of impacted canines.
Complications in implant dentistry
Authors: Hanif Ayesha , Qureshi Saima , Sheikh Zeeshan , Rashid Haroon 
Published: March 2017

ABSTRACTAfter tooth loss, an individual may seek tooth replacement so that his/her function and esthetics could be restored. Clinical prosthodontics, during the past decade, has significantly improved and developed according to the advancements in the science and patient's demands and needs. Conventional options in prosthodontics for substituting a missing single tooth include the removable partial denture, partial and full coverage bridgework, and resin-bonded bridgework. Dental implants have gained increasing popularity over the years as they are capable of restoring the function to near normal in both partial and completely edentulous arches. With substantial evidence available, fixed implant-supported prosthesis are fully acknowledged as a reliable treatment option for the replacement of single or multiple missing teeth nowadays. While dental implants are increasingly becoming the choice of replacement for missing teeth, the impediments associated with them are progressively emerging too.
Lower tropospheric distributions of O3 and aerosol over Raoyang, a rural site in the North China Plain
Authors: Wang Rui , Xu Xiaobin , Jia Shihui , Ma Ruisheng , Ran Liang , Deng Zhaoze , Lin Weili , Wang Ying , Ma Zhiqiang 
Published: March 2017

Abstract. The North China Plain (NCP) has become one of the most polluted regions in China, with the rapidly increasing economic growth in the past decades. High concentrations of ambient O3 and aerosol have been observed at urban as well as rural sites in the NCP. Most of the in situ observations of air pollutants have been conducted near the ground so that current knowledge about the vertical distributions of tropospheric O3 and aerosol over the NCP region is still limited. In this study, vertical profiles of O3 and size-resolved aerosol concentrations below 2.5 km were measured in summer 2014 over a rural site in the NCP, using an unmanned aerial vehicle (UAV) equipped with miniature analyzers. In addition, vertical profiles of aerosol scattering property in the lower troposphere and vertical profiles of O3 below 1 km were also observed at the site using a lidar and tethered balloon, respectively. The depths of the mixed layer and residual layer were determined according to the vertical gradients of lidar particle extinction and aerosol number concentration. Average O3 and size-resolved aerosol number concentration in both the mixed and residual layer were obtained from the data observed in seven UAV flights. The results show that during most of the flights the O3 levels above the top of mixed layer were higher than those below. Such a positive gradient in the vertical distribution of O3 makes the residual layer an important source of O3 in the mixed layer, particularly during the morning when the top of mixed layer is rapidly elevated. In contrast to O3, aerosol number concentration was normally higher in the mixed layer than in the residual layer, particularly in the early morning. Aerosol particles were overwhelmingly distributed in the size range  <  1 µm, showing slight differences between the mixed and residual layers. Our measurements confirm that the lower troposphere over the rural area of the NCP is largely impacted by anthropogenic pollutants locally emitted or transported from urban areas. Compared with the historic O3 vertical profiles over Beijing from the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC), a strong increase in O3 can be found at all heights below 2.5 km in the decade from 2004 to 2014, with the largest enhancement of about 41.6 ppb. This indicates that the lower troposphere over the northern part of the NCP has experienced rapidly worsening photochemical pollution. This worsening trend in photochemical pollution deserves more attention in the future.
Collection efficiency of α-pinene secondary organic aerosol particles explored via light-scattering single-particle aerosol mass spectrometry
Authors: Robinson Ellis Shipley , Onasch Timothy B. , Worsnop Douglas , Donahue Neil M. 
Published: March 2017

Abstract. We investigated the collection efficiency and effective ionization efficiency for secondary organic aerosol (SOA) particles made from α-pinene + O3 using the single-particle capabilities of the aerosol mass spectrometer (AMS). The mean count-based collection efficiency (CEp) for SOA across these experiments is 0.30 (±0.04 SD), ranging from 0.25 to 0.40. The mean mass-based collection efficiency (CEm) is 0.49 (±0.07 SD). This sub-unit collection efficiency and delayed vaporization is attributable to particle bounce in the vaporization region. Using the coupled optical and chemical detection of the light-scattering single-particle (LSSP) module of the AMS, we provide clear evidence that delayed vaporization is somewhat of a misnomer for these particles: SOA particles measured as a part of the AMS mass distribution do not vaporize at a slow rate; rather, they flash-vaporize, albeit often not on the initial impact with the vaporizer but instead upon a subsequent impact with a hot surface in the vaporization region. We also find that the effective ionization efficiency (defined as ions per particle, IPP) decreases with delayed arrival time. CEp is not a function of particle size (for the mobility diameter range investigated, 170–460 nm), but we did see a decrease in CEp with thermodenuder temperature, implying that oxidation state and/or volatility can affect CEp for SOA. By measuring the mean ions per particle produced for monodisperse particles as a function of signal delay time, we can separately determine CEp and CEm and thus more accurately measure the relative ionization efficiency (compared to ammonium nitrate) of different particle types.