scholarly journals The Effect of Simplifying Dental Implant Drilling Sequence on Osseointegration: An Experimental Study in Dogs

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Gabriela Giro ◽  
Nick Tovar ◽  
Charles Marin ◽  
Estevam A. Bonfante ◽  
Ryo Jimbo ◽  
...  
Keyword(s):  
Histological Analysis ◽  
The Other ◽  
Bone Implant ◽  
Independent Variables ◽  
Dependent Variables ◽  
Initial Hypothesis ◽  
Bone To Implant Contact ◽  
Level Of Significance ◽  
Conventional Drilling

Objectives. To test the hypothesis that there would be no differences in osseointegration by reducing the number of drills for site preparation relative to conventional drilling sequence.Methods. Seventy-two implants were bilaterally placed in the tibia of 18 beagle dogs and remained for 1, 3, and 5 weeks. Thirty-six implants were 3.75 mm in diameter and the other 36 were 4.2 mm. Half of the implants of each diameter were placed under a simplified technique (pilot drill + final diameter drill) and the other half were placed under conventional drilling where multiple drills of increasing diameter were utilized. After euthanisation, the bone-implant samples were processed and referred to histological analysis. Bone-to-implant contact (BIC) and bone-area-fraction occupancy (BAFO) were assessed. Statistical analyses were performed by GLM ANOVA at 95% level of significance considering implant diameter, timein vivo,and drilling procedure as independent variables and BIC and BAFO as the dependent variables.Results. Both techniques led to implant integration. No differences in BIC and BAFO were observed between drilling procedures as time elapsedin vivo.Conclusions. The simplified drilling protocol presented comparable osseointegration outcomes to the conventional protocol, which proved the initial hypothesis.

An Investigation of the Effect of Latency on the Operator’s Trust and Performance for Manual Multi-robot Teleoperated Tasks

2017 ◽  
Vol 61 (1) ◽  
pp. 390-394 ◽  
Author(s):  
Hunter Rogers ◽  
Amro Khasawneh ◽  
Jeffery Bertrand ◽  
Kapil Chalil Madathil
Keyword(s):  
Confidence Level ◽  
Search And Rescue ◽  
The Other ◽  
Repeated Measure ◽  
Independent Variables ◽  
Subjective Workload ◽  
Dependent Variables ◽  
Independent Variable ◽  
And Performance ◽  
Two Independent Variables

Latency is an important factor when conducting teleoperated missions. This study investigates the effects of latency on a set of dependent variables: performance (measured by time and number of errors), subjective workload, trust, and usability. These measures were tested in a simulated search-and-rescue mission over two levels of two independent variables. One independent variable was the number of robots – one or two (within-subject), and the other independent variable was latency – simulations with and without latency (between-subject.) The significant effect of the independent variables on the dependent variables were checked using repeated measure two-way ANOVA with a confidence level of 95%. The data determined any significant effects that latency and/or the number of robots had on such factors as errors, dependability, reliability, harmful outcomes, temporal demand, and frustration.

Learning by Discovery: Incidental Learning and Presentation of Rule

1978 ◽  
Vol 43 (3) ◽  
pp. 732-734
Author(s):  
G. D. Hermann
Keyword(s):  
Incidental Learning ◽  
Instructional Methods ◽  
Instructional Method ◽  
The Other ◽  
Socioeconomic Level ◽  
Not Given ◽  
Independent Variables ◽  
Dependent Variables ◽  
Learning By Discovery

Three studies on learning by discovery were conducted using a refraction task. In each study, three instructional methods were used, ruleg (rule-example), egrule (examples followed by the rule), and eg only (rule not given). Independent variables included sex and socioeconomic level. The 8 dependent variables used were measures of retention, transfer, incidental learning, and verbalization. Few significant findings were obtained; however, on the verbalization of the rule measure, the groups given the rule performed higher than the group not given the rule. There was little interaction between instructional method and the other variables.

scholarly journals Comparing the differences in three measures of healthy life expectancy among prefectures in Japan.

2020 ◽  
Author(s):  
KAZUYA TAIRA ◽  
Soshiro Ogata ◽  
Kei Kamide
Keyword(s):  
Life Expectancy ◽  
Ecological Study ◽  
Open Data ◽  
The Other ◽  
Healthy Life Expectancy ◽  
Healthy Life ◽  
Independent Variables ◽  
Dependent Variables ◽  
Disability Free Life Expectancy ◽  
Government Statistics

Abstract Objective: An ecological study using secondary open data from Japanese government statistics was conducted. The study aimed to verify differences in three measures of healthy life expectancy (HLE); namely, disability-free life expectancy without activity limitation (DFLE-AL), life expectancy with self-perceived health (LE-SH), and disability-free life expectancy without care need (DFLE-CN).Results: Each HLE from 47 prefectures in 2010, 2013, and 2016 was extended over time. There were strong Cronbach’s coefficient alpha (α) between DFLE-AL and LE-SH (Minimum α; 0.80, Maximum α;0.90) as well as between LE and DFLE-CN (Minimum α; 0.92, Maximum α; 0.99) in both sexes in every data year. However, the other pairs had weaker associations. In regression analysis with each HLE as a dependent variable and aging rate, mortality, the proportion of unhealthy people as independent variables, the subjective unhealthy rate had significant standardized partial regression coefficients (β) in models with DFLE-AL and LE-SH as dependent variables (Minimum β; -0.56, Maximum β; -0.34). Therefore, DFLE-CN tended to differ from the other HLEs. The subjective unhealthy rate had a significant influence on DFLE-AL and LE-SH.

scholarly journals Work values of generation Y

2018 ◽  
Vol 1 (1) ◽  
pp. 40
Author(s):  
Faizah Indriyana ◽  
Indi Djastuti
Keyword(s):  
Generation Y ◽  
Work Values ◽  
The Other ◽  
Global Markets ◽  
Work Status ◽  
Management Approach ◽  
Independent Variables ◽  
Gender And Work ◽  
Dependent Variables ◽  
Extrinsic Work Values

There are about 38.83% of Indonesian workforces who are include in generation Y and this is more than the number of the other generations. The rush of global markets will create a new management approach that includes the generation Y’s interest on work aspects. So, this study aims to analyze the differences of generation Y’s work values based on gender and work status. The study also explores which predictors variable that has the strongest discriminant for generation Y’s work values based on gender and works status. The number of the sample used in this research is 137 Millennial by using nonprobability sampling. This study uses discriminant analysis with the help of SPSS version 23. Independent variables in this study are intrinsic work values, extrinsic work values, social/altruistic work values, and prestige work values. The dependent variables used in this study are the gender of generation Y and work status of generation Y. Two dependent variables this study used two model of discriminant in testing the research hypothesis. The result of analysis indicates that there are significant differences between generation Y by gender and work status. Generation Y’s work values based on gender and work status have the strongest discriminator variables on extrinsic work values.  

scholarly journals Evaluation of Implants with Different Macrostructures in Type I Bone—Pre-Clinical Study in Rabbits

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1521
Author(s):  
Amanda de Carvalho Silva Leocádio ◽  
Matusalém Silva Júnior ◽  
Guilherme José Pimentel Lopes de Oliveira ◽  
Gustavo da Col Santos Pinto ◽  
Rafael Silveira Faeda ◽  
...  
Keyword(s):  
Clinical Study ◽  
Cortical Bone ◽  
Histological Analysis ◽  
Primary Stability ◽  
The Other ◽  
Insertion Torque ◽  
Type I ◽  
Bone Implant ◽  
Tibial Metaphysis ◽  
Bone Implant Contact

The objective of this study was to assess the primary stability and the osseointegration process in implants with different macrostructures (Cylindrical vs. Hybrid Conical) in rabbit tibiae. Twenty-four (24) rabbits were used, divided into 3 experimental periods (2, 4 and 8 weeks) with 8 animals each. Each animal bilaterally received 2 implants from each group in the tibial metaphysis: Cylindrical Implant (CI) and Hybrid Conical Implant (HCI). All implants were assessed for insertion torque. After the experimental periods, one of the implants in each group was submitted to the removal counter-torque test and descriptive histological analysis while the other implant was used for microtomographic and histometric analysis (%Bone-Implant Contact). HCI implants showed higher insertion torque (32.93 ± 10.61 Ncm vs. 27.99 ± 7.80 Ncm) and higher % of bone-implant contact in the 8-week period (79.08 ± 11.31% vs. 59.72 ± 11.29%) than CI implants. However, CI implants showed higher values of removal counter-torque than HCI implants in the 8-week period (91.05 ± 9.32 Ncm vs. 68.62 ± 13.70 Ncm). There were no differences between groups regarding microtomographic data. It can be concluded that HCI implants showed greater insertion torque and bone-implant contact in relation to CI implants in the period of 8 weeks when installed in cortical bone of rabbits.

scholarly journals Comparing the differences in three measures of healthy life expectancy among prefectures in Japan.

2020 ◽  
Author(s):  
KAZUYA TAIRA ◽  
Soshiro Ogata ◽  
Kei Kamide
Keyword(s):  
Life Expectancy ◽  
Ecological Study ◽  
Open Data ◽  
The Other ◽  
Healthy Life Expectancy ◽  
Healthy Life ◽  
Independent Variables ◽  
Dependent Variables ◽  
Disability Free Life Expectancy ◽  
Government Statistics

Abstract Objective: An ecological study using secondary open data from Japanese government statistics was conducted. The study aimed to verify differences in three measures of healthy life expectancy (HLE); namely, disability-free life expectancy without activity limitation (DFLE-AL), life expectancy with self-perceived health (LE-SH), and disability-free life expectancy without care need (DFLE-CN).Results: Each HLE from 47 prefectures in 2010, 2013, and 2016 was extended over time. There were strong Cronbach’s coefficient alpha (α) between DFLE-AL and LE-SH (Minimum α; 0.80, Maximum α;0.90) as well as between LE and DFLE-CN (Minimum α; 0.92, Maximum α; 0.99) in both sexes in every data year. However, the other pairs had weaker associations. In regression analysis with each HLE as a dependent variable and aging rate, mortality, the proportion of unhealthy people as independent variables, the subjective unhealthy rate had significant standardized partial regression coefficients (β) in models with DFLE-AL and LE-SH as dependent variables (Minimum β; -0.56, Maximum β; -0.34). Therefore, DFLE-CN tended to differ from the other HLEs. The subjective unhealthy rate had a significant influence on DFLE-AL and LE-SH.

scholarly journals Approaches to Control Mechanisms and Their Implications for Companies ’ Profitability: a Study in UAE

2020 ◽  
Vol 4 (2) ◽  
pp. 11-20
Author(s):  
Essia Ries Ahmed ◽  
Tariq Tawfeeq Yousif Alabdullah ◽  
Muhammad Shabir Shaharudin
Keyword(s):  
Regression Analysis ◽  
Financial Sector ◽  
Listed Companies ◽  
Foreign Ownership ◽  
The Other ◽  
Control Mechanisms ◽  
Insider Ownership ◽  
Independent Variables ◽  
Dependent Variables

This study tries to evaluate and test the role of control mechanisms represented by foreign ownership and insider ownership on companies’ profitability in the listed companies in the UAE and whether independent variables are matter in determining the profitability of such companies. This study utilized companies belong to non-financial sector for the year of 2019 with a sample of 50 companies to be analyzed in the current study. To test the independent and dependent variables, regression analysis was used via using SPSS. The findings show that insider ownership has insignificant impact on companies’ profitability On the other hand, the findings revealed evidence to support the effect of foreign ownership on companies’ profitability. Moreover, there is insignificant evidence reflected the fact that companies’ size has insignificant impact on companies’ profitability. This study added further evidence in Dubai context where there is a rare and unique studies that have been done in this important context. It takes in tits account to investigate both insider and foreign ownership and their impact companies’ profitability

scholarly journals Comparing the differences in three measures of healthy life expectancy among prefectures in Japan.

2020 ◽  
Author(s):  
KAZUYA TAIRA ◽  
Soshiro Ogata ◽  
Kei Kamide
Keyword(s):  
Life Expectancy ◽  
Ecological Study ◽  
Open Data ◽  
The Other ◽  
Healthy Life Expectancy ◽  
Healthy Life ◽  
Independent Variables ◽  
Dependent Variables ◽  
Disability Free Life Expectancy ◽  
Government Statistics

Abstract Objective: An ecological study using secondary open data from Japanese government statistics was conducted. The study aimed to verify differences in three measures of healthy life expectancy (HLE); namely, disability-free life expectancy without activity limitation (DFLE-AL), life expectancy with self-perceived health (LE-SH), and disability-free life expectancy without care need (DFLE-CN).Results: Each HLE from 47 prefectures in 2010, 2013, and 2016 was extended over time. There were strong Cronbach’s coefficient alpha (α) between DFLE-AL and LE-SH (Minimum α; 0.80, Maximum α;0.90) as well as between LE and DFLE-CN (Minimum α; 0.92, Maximum α; 0.99) in both sexes in every data year. However, the other pairs had weaker associations. In regression analysis with each HLE as a dependent variable and aging rate, mortality, the proportion of unhealthy people as independent variables, the subjective unhealthy rate had significant standardized partial regression coefficients (β) in models with DFLE-AL and LE-SH as dependent variables (Minimum β; -0.56, Maximum β; -0.34). Therefore, DFLE-CN tended to differ from the other HLEs. The subjective unhealthy rate had a significant influence on DFLE-AL and LE-SH.

Relationship Between Recent Change of Anhedonia and Suicidal Ideation Taking Into Account the Severity and the Acuteness of Suicidal Ideation As Well As the Specific Roles of Loss of Pleasure and Loss of Interest in People: A Study on Medical Students

2021 ◽  
pp. 003022282110373
Author(s):  
Alice Solibieda ◽  
Marianne Rotsaert ◽  
Gwenolé Loas
Keyword(s):  
Medical Students ◽  
Suicidal Ideation ◽  
Life Time ◽  
Recent Change ◽  
The Other ◽  
Independent Variables ◽  
Dependent Variables

The aim of the study was to explore the relationships between recent changes of anhedonia or particular symptoms of recent changes of anhedonia and suicidal ideation taking into account the severity of suicidal ideations. In a group of 173 medical students, scores of the anhedonia subscale (ANH-BDI) of the BDI-II (i.e. 4 anhedonia items: loss of pleasure, loss of interest, loss of energy and loss of interest in sex) were compared between 95 subjects without suicidality, 24 subjects with life-time suicidal ideation, 28 subjects with recent suicidal ideation and 26 planners. Analyses of covariance (ANCOVA) were performed referring to groups as independent variables, the cognitive-affective subscale (CA-BDI) of the BDI-II as a covariate, the ANH-BDI and each of the four anhedonia items as dependent variables. High levels of loss of interest characterized planners when compared to the other three groups. Loss of interest could be associated with recent and severe suicidal ideation.

scholarly journals Bone Response to Conventional Titanium Implants and New Zirconia Implants Produced by Additive Manufacturing

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4405
Author(s):  
Jin-Cheol Kim ◽  
In-Sung Luke Yeo
Keyword(s):  
Laser Scanning ◽  
Titanium Implants ◽  
Laser Scanning Microscopy ◽  
The Other ◽  
Confocal Laser ◽  
Bone Response ◽  
3D Printed ◽  
Bone To Implant Contact ◽  
Zirconia Implants

The aim of the present study was to evaluate the in vivo bone response to an additively manufactured zirconia surface compared to osseointegration into titanium (Ti) surfaces. Scanning electron microscopy, confocal laser scanning microscopy, and electron spectroscopy for chemical analysis were performed to assess the surface characteristics of implant specimens. For the in vivo evaluation, eight Ti implants and eight 3D-printed zirconia implants were used. The surface of four Ti implants was sandblasted, large-grit, and acid-etched (Ti-SLA group), while those of the other four Ti implants were left untreated (Ti-turned group). The zirconia implants had no further surface modification. Implants were placed into the tibiae of four rabbits; two received the Ti-SLA and zirconia implants and the other two received Ti-turned and zirconia implants. The experimental animals were sacrificed after four weeks of surgery, and the undecalcified microscopic slides were prepared. The bone–implant interface was analyzed by histomorphometry to evaluate the bone response. The degree of surface roughness showed that Ti-SLA was the highest, followed by zirconia and Ti-turned surfaces. The 3D-printed zirconia surface showed similar bone-to-implant contact to the Ti-turned surface, and Ti-SLA had the most bone-to-implant contact. The additively manufactured zirconia implant surface is biocompatible with respect to osseointegration compared to the commercially pure Ti surface.

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