Search results for "Significant difference"
showing 10 items of 337 documents
Influence of surface treatments on enamel susceptibility to staining by cigarette smoke
2013
Objectives: The purpose of this study was to evaluate the influence of remineralizing agents, including artificial saliva, neutral fluoride, and casein phosphopeptide-amorphous calcium phosphate (CPP-ACP), on the susceptibility of bleached enamel to staining by cigarette smoke. Study Design: Fifty bovine enamel blocks were randomly divided into five groups (n = 10): G1- bleaching; G2- bleaching and immersion in artificial saliva; G3- bleaching and application of CPP-ACP; G4- bleaching and application of neutral fluoride; and G5- untreated (Control). Teeth were bleached with 35% hydrogen peroxide and treated with the appropriate remineralizing agent. After treatment, all groups were exposed …
Evaluation the oral hygiene conditions, oral Candida colonization and salivary Streptococcus mutans and Lactobacilli density in a group of β-thalasse…
2019
Background In this study, the prevalence and distribution of dental caries and oral hygiene conditions in a group of patients with β-TM are evaluated and the results compared to age-and gender-matched healthy patients. In addition, oral candida colonization and the density of Streptococcus mutans (S.mutans) and Lactobacilli in the total saliva are assessed. Material and Methods This study involved 59 β-TM patients between 6-16 years old (mean:11.59±3.22), who applied to the Department of Pedodontics, Faculty of Dentistry, Akdeniz University, with ongoing follow-up, treatment and regular blood transfusions. All enrolled patients were diagnosed with β-TM by the Department of Pediatric Hematol…
Ex vivo measurement reliability using two different cbct scanners for orthodontic purposes
2012
Background There are many cone beam computed tomography (CBCT) scanners available on the market: detector technology, algorithm precision, and scanner settings influence image quality. The aim of this study was to compare the accuracy of linear measurements made on images of the same sample obtained using two different CBCT scanners. Methods Twenty-eight linear measurements between orthodontic anatomical landmarks that were marked with gutta-percha points on a fresh sacrificed lamb head were taken three times. The head was scanned with two CBCT scanners using different scanning parameters. Digital Imaging and Communications in Medicine (DICOM) images were reconstructed and the same measurem…
Kelimpahan Makrozoobentos di Daerah Bervegetasi (Lamun) dan Tidak Bervegetasi di Teluk Doreri Manokwari
2017
Makrozoobentos di daerah bervegetasi (lamun) memiliki kepadatan yang lebih tinggi yaitu berkisar antara 0,070-0,085 ind/2738,06 cm3, dibandingkan dengan pada daerah yang tidak bervegetasi yaitu berkisar antara 0,035-0,067 ind/2738,06 cm3. Angka ini juga dibuktikan dengan uji t yang menunjukkan H1 diterima yang berarti ada perbedaan yang nyata antara kepadatan makrozoobentos yang ditemukan di daerah bervegetasi dan daerah tidak bervegetasi. Jumlah spesies yang ditemukan di daearah bervegetasi dengan alat corer di Teluk Doreri adalah 113 spesies dan di daerah tidak bervegetasi ditemukan 57 spesies.
Absentismo escolar en España. Datos y reflexiones
2020
El absentismo escolar no recibe en España la atención que merece. Pese a que diversos estudios señalan que la ausencia de las aulas del alumnado en edad de escolarización obligatoria es más amplia de lo que parece ‒los informes PISA, por ejemplo, lo cuantifican entre el 25 y el 28 % del alumnado de 4º de la secundaria obligatoria‒ esta realidad presenta una escasa visibilidad educativa y social. En el trabajo se realiza una primera clarificación conceptual del problema, para posteriormente analizar con un enfoque integral la normativa legal que articula en nuestro país: el derecho a la educación; la escolarización obligatoria y el absentismo. A partir de ese marco teórico, se señalan los tr…
Time and Gender Influence in Sexual Behavior of Romanian Adolescents
2015
Abstract Our study tries to establish if the young generation starts sexual activity earlier, under mass media and social pressure, and if the gender is a relevant influence factor in this context. A questionnaire-based survey was developed in order to evaluate the potential relationship between psychological traits and behavior implying risk for people health. The questionnaire was distributed and we received valid responses from a number of 1,364 people (536 male and 828 female). Using SPSS one way ANOVA we found a significant difference determinate by gender regarding the age of sexual activity start.
In vitro contamination of hair by marijuana smoke.
2004
Abstract Background: The deposition of cannabinoids on/into hair from environmental smoke can be considered as a potential source of drug findings in hair. We studied external uptake of cannabinoids from marijuana smoke, investigating possible influencing factors on drug uptake and the efficiency of decontamination procedures. Methods: Strands of a natural hair sample were moistened with water, greased with sebum or sebum/sweat, or bleached or permed. Treated and untreated samples were exposed to marijuana smoke for 60 min. Aliquots of each hair strand were either kept unwashed or were washed with methanol, dichloromethane, or 5 g/L dodecyl sulfate in water. Cannabinoid concentrations in un…
The Role of Information and Communication Technologies in the Relationship Between Group Effectiveness and Group Potency
2008
The aim of this research is to examine the role of information and communication technologies in the relationship between group effectiveness and group potency changes. A laboratory experiment compared 44 groups of four members, working in two communication media—face-to-face condition and computer-mediated communication (CMC). Groups developed a project during 4 weekly meetings during a 1-month period. No significant difference in group potency between communication media was found initially. However, different patterns of group potency development over time were identified. Group potency increased in the face-to-face condition, whereas it remained stable in the CMC condition. Results sho…
Effect of postbleaching application of an antioxidant on enamel bond strength of three different adhesives
2010
Objectives: The aim of this study was to compare the shear bond strength (sbs) of three different adhesives on bleached enamel immmmediately after bleaching, bleached/delayed for 1 week, and bleached/applied antioxidizing agent. Study Design: The enamel surfaces of 144 freshly extracted incisors without any caries and restorations were flattened and divided into 12 groups. The following adhesives were investigated: Optibond FL (OFL) (three-step etch&rinse), Optibond Solo Plus (OSP) (two-step etch&rinse), Optibond All-in-One (OA) (one-step self-etch), (Kerr, Orange, USASA). Unbleached enamel groups were prepared as negative controls. The remainder surfaces were bleached with 20% Opalescent P…
Repetition priming: Is music special?
2005
Using short and long contexts, the present study investigated musical priming effects that are based on chord repetition and harmonic relatedness. A musical target (a chord) was preceded by either an identical prime or a different but harmonically related prime. In contrast to words, pictures, and environmental sounds, chord processing was not facilitated by repetition. Experiments 1 and 2 using single-chord primes showed either no significant difference between chord repetition and harmonic relatedness or facilitated processing for harmonically related targets. Experiment 3 using longer prime contexts showed that musical priming depended more on the musical function of the target in the p…