A pilot study on the effects of direct contact of two different surgical burs on the cadaveric lingual nerve

2018 ◽  
Vol 47 (9) ◽  
pp. 1153-1160 ◽  
Author(s):  
S.M. Al-Amery ◽  
W.C. Ngeow ◽  
P. Nambiar ◽  
M. Naidu
Keyword(s):  
Pilot Study ◽  
Direct Contact ◽  
Lingual Nerve

scholarly journals The Effect of Periogen Solution on Dental Calculus in vitro: A Pilot Study

2017 ◽  
Vol 6 (1) ◽  
pp. 33-34
Author(s):  
Marta Radnai ◽  
Zsolt Rajnics
Keyword(s):  
Pilot Study ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Oral Hygiene ◽  
Direct Contact ◽  
Photometric Method ◽  
Distilled Water ◽  
Dental Calculus ◽  
Carbamide Peroxide

ABSTRACT Introduction Calculus can accommodate teeth and prosthetic restorations when the patient's oral hygiene is poor. Hardened calculus cannot be removed by patients, it needs professional cleaning using ultrasonic scaler or hand instrument. Solutions dissolving and preventing accumulation of dental calculus may help to keep dentures clean. The aim of this investigation was to examine the effect of Periogen on dental calculus in vitro. Materials and methods Calculus was collected via scaling from patients during a routine dental checkup. The samples were stored in carbamide peroxide solution (5%) for 24 hours, then rinsed and stored in distilled water. First, the Ca2+ content of the calculus was determined by photometric method after treating with cc. hydrochloric acid solution for 1 hour. The calculus samples were put in Periogen solution, prepared according to manufacturer's instruction for 16 hours, then crushed and put in Periogen solution with the same concentrate for 4.5 hours. The Ca2+ dissolved from calculus was measured using same photometric method. Results Calculus samples contained 26 mg/100 mg Ca2+, which is similar to dentin (27–28 mg/100 mg) and to enamel (36 mg/100 mg). The Ca2+ dissolved from calculus after treating with cc. hydrochloric acid for 1 hour was considered 100%. Ca2+ dissolution was 1.5% after 16 hours (0.09%/h) and 5.45% (1.21%/h) for the next 4.5 hours after pulverizing the sample. This showed Periogen Ca2+ dissolution was 385 µg/100 mg after 16 hours direct contact with the material. Conclusion The experiment showed that pulverizing the previously hard calculus was done easily after soaking it in Periogen. The ability of Periogen to soften the calculus needs to be further investigated. How to cite this article Rajnics Z, Radnai M. The Effect of Periogen Solution on Dental Calculus in vitro: A Pilot Study. Int J Experiment Dent Sci 2017;6(1):33-34.

scholarly journals Meeting a person with pedophilia: Attitudes towards pedophilia among psychology students: A pilot study

2021 ◽  
Author(s):  
Rebecca L. Heron ◽  
Lena Schwiekert ◽  
Julie Karsten
Keyword(s):  
Pilot Study ◽  
Direct Contact ◽  
Psychology Students ◽  
Rank Test ◽  
Sex Offenses ◽  
Punitive Attitudes ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Students Attitudes ◽  
The One

AbstractPeople with pedophilia (PWP) are highly stigmatized. Public opinion is strongly pre-consolidated – it is often assumed that every PWP commits child sex offenses. This presumption not only affects PWP negatively. Research suggests that this stigmatization may cohere with PWP actually committing child sex offenses. Various recent studies have investigated different kinds of anti-stigma interventions and their effectiveness. Direct contact to a PWP has not yet been investigated. The present pilot study aimed at finding out whether a dichotomous anti-stigma intervention can change psychology students’ attitudes towards PWP regarding perceived dangerousness, intentionality, deviance, and punitive attitudes. In a one sample pre-post design, we presented 162 students of the University of Groningen with both an educational lecture and direct contact to a PWP. Participants learned about child sex offending and pedophilia. Then, Gabriel, a PWP shared his experiences about growing up, coping, and living with pedophilia. Results of the one-sample Wilcoxon signed-rank test revealed significantly diminished negative attitudes towards PWP after the intervention. Students perceived PWP as less dangerous, having less intent, and being less psychologically deviant. Additionally, students’ punitive attitudes towards PWP diminished significantly. Also, a thematic analysis revealed that students were highly interested in the topic of pedophilia and greatly appreciative of Gabriel sharing his story. This pilot study was the first to provide evidence for the effectiveness of a combination of an educational lecture and direct contact to a PWP as an anti-stigma intervention.

Antimicrobial activity of antibiotic pastes used in pulp therapy through direct contact with a multispecies biofilm: a pilot study

2020 ◽  
Vol 5 (1) ◽  
pp. 17-23
Author(s):  
Mariana Coutinho Sancas ◽  
Anne Caroline Lunardi de Souza ◽  
Amanda Souza Nunes Monteiro ◽  
Andréa Vaz Braga Pintor ◽  
Maysa Lannes Duarte ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Pilot Study ◽  
Direct Contact ◽  
Pulp Therapy ◽  
Multispecies Biofilm

scholarly journals Surface analysis of latex and silicone pacifier nipples after exposure to acidic artificial saliva: a pilot study

2021 ◽  
Vol 10 (16) ◽  
pp. e111101623074
Author(s):  
Thiago Isidro Vieira ◽  
Kira Maria de Sousa Andrade ◽  
Thayana Maria Navarro Ribeiro de Lima ◽  
Mariana Leonel Martins ◽  
Simone Alves de Sousa ◽  
...  
Keyword(s):  
Pilot Study ◽  
Direct Contact ◽  
Artificial Saliva ◽  
Three Dimensional ◽  
Optical Profilometry ◽  
Roughness Parameters ◽  
Before And After ◽  
Paired T Test ◽  
Qualitative Changes ◽  
Surface Changes

Objective: To measure surface changes of pacifier nipples after immersion in acidic artificial saliva. Methods: Two types of pacifier nipples (latex and silicone) were selected. Five copies of each type were used. The protocol consisted of immersion in acidic artificial saliva (pH = 5.97) for 16 days. The nipples of the pacifier remained in direct contact with saliva in an individualized, opaque and closed container in a bacteriological incubator at 37ºC. The samples were examined before and after exposure to saliva through qualitative (based on images obtained in a 100 mm macro lens and three-dimensional images with 10% amplification obtained in the profilometry) and quantitative (roughness data obtained in non-contact 3D optical profilometry). Data were obtained in duplicate and analyzed using descriptive and inferential statistics. The findings were tested for normality (Shapiro-Wilk). Paired t-test or Wilcoxon was used to compare before and after roughness data. Results: In the image analysis, it was observed that only the surface of the latex pacifier's nipples showed an irregular appearance after exposure to saliva. In the quantitative evaluation, no differences were found between the roughness values before and after (p>0.05). Conclusion: This pilot study demonstrated qualitative changes in the surface of latex pacifiers. However, it was not able to demonstrate statistically significant differences for the roughness parameters before and after exposure to acidic artificial saliva in the nipples of latex and silicone pacifiers.

Saturn's E, G and F rings: modulated by the plasma sheet

1984 ◽  
Vol 75 ◽  
pp. 597
Author(s):  
E. Grün ◽  
G.E. Morfill ◽  
T.V. Johnson ◽  
G.H. Schwehm
Keyword(s):  
Solar Wind ◽  
Direct Contact ◽  
Transport Processes ◽  
Time Variable ◽  
Dust Particles ◽  
Spatial Diffusion ◽  
Drag Forces ◽  
Orbit Perturbation ◽  
Time Variations ◽  
F Ring

ABSTRACTSaturn's broad E ring, the narrow G ring and the structured and apparently time variable F ring(s), contain many micron and sub-micron sized particles, which make up the “visible” component. These rings (or ring systems) are in direct contact with magnetospheric plasma. Fluctuations in the plasma density and/or mean energy, due to magnetospheric and solar wind processes, may induce stochastic charge variations on the dust particles, which in turn lead to an orbit perturbation and spatial diffusion. It is suggested that the extent of the E ring and the braided, kinky structure of certain portions of the F rings as well as possible time variations are a result of plasma induced electromagnetic perturbations and drag forces. The G ring, in this scenario, requires some form of shepherding and should be akin to the F ring in structure. Sputtering of micron-sized dust particles in the E ring by magnetospheric ions yields lifetimes of 102to 104years. This effect as well as the plasma induced transport processes require an active source for the E ring, probably Enceladus.

Pilot study on criteria in cavity preparation-facts or artifacts?

1973 ◽  
Vol 37 (11) ◽  
pp. 27-31 ◽  
Author(s):  
G Salvendy ◽  
WM Hinton ◽  
GW Ferguson ◽  
PR Cunningham
Keyword(s):  
Pilot Study ◽  
Cavity Preparation

A Pilot Study of Early Storybook Reading With Babies With Hearing Loss

2019 ◽  
Vol 62 (9) ◽  
pp. 3397-3412
Author(s):  
Michelle I. Brown ◽  
David Trembath ◽  
Marleen F. Westerveld ◽  
Gail T. Gillon
Keyword(s):  
Hearing Loss ◽  
Pilot Study ◽  
Visual Analysis ◽  
Single Case ◽  
Eye Contact ◽  
Preliminary Evidence ◽  
Storybook Reading ◽  
Book Selection ◽  
Turn Taking ◽  
Parent Child

Purpose This pilot study explored the effectiveness of an early storybook reading (ESR) intervention for parents with babies with hearing loss (HL) for improving (a) parents' book selection skills, (b) parent–child eye contact, and (c) parent–child turn-taking. Advancing research into ESR, this study examined whether the benefits from an ESR intervention reported for babies without HL were also observed in babies with HL. Method Four mother–baby dyads participated in a multiple baseline single-case experimental design across behaviors. Treatment effects for parents' book selection skills, parent–child eye contact, and parent–child turn-taking were examined using visual analysis and Tau-U analysis. Results Statistically significant increases, with large to very large effect sizes, were observed for all 4 participants for parent–child eye contact and parent–child turn-taking. Limited improvements with ceiling effects were observed for parents' book selection skills. Conclusion The findings provide preliminary evidence for the effectiveness of an ESR intervention for babies with HL for promoting parent–child interactions through eye contact and turn-taking.

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