Evaluation of Two Facebow/Semi-adjustable Articulator Systems for Orienting Maxillary Cast on Articulators: A Pilot Study

ABSTRACT Aim The present study was aimed to assess the transferability of occlusal plane (OP) orientation from the patient to the articulators with the help of two different facebow systems and evaluated with a gold standard. Materials and methods Twenty dentate patients were selected for the study. Two semi-adjustable arcon articulators that are Hanau Wide® Vue using SpringBow and Whip Mix® using quickmount facebow were used in the study. Mean angle between OP to horizontal reference plane obtained from Hanau Wide Vue articulator system (SpringBow using Orbitale as anterior reference point) and Whip Mix articulator system (quickmount facebow using nasion as anterior reference point) was tabulated. These values obtained were further compared with each other and evaluated against cephalometric evidence, which was considered as the gold standard for the study. Descriptive statistics, analysis of variance, Scheffe post hoc analysis for group comparison, and level of significance (P) was calculated using Statistical Package for the Social Sciences version 16 (IBM, New York, USA) software program. Results Intragroup comparison of mean angle OP values showed highly significant difference (p = 0.000). Comparison between Hanau Wide Vue articulator system and Whip Mix articulator system showed statistically highly significant with a mean difference of 10.51° with Hanau system values being lower than Whip Mix system. Difference between Hanau system and cephalometric values were statistically significant with a mean difference of 2.835° and Hanau system consistently recording lower values than cephalometric values. Difference between Whip Mix system and cephalometric values was also statistically significant with a mean difference of 7.680° with group 2 values were on average 7.680° higher than group 3. Conclusion Within the limitations of this study, the Hanau system and Whip Mix system showed significant difference in reproduction of angle between OP and horizontal reference plane. Hanau articulator system showed closer values to that of cephalometric values in comparison with Whip Mix articulator system. Clinical significance Orientation of the maxillary cast in an articulator is a crucial part of several techniques used in dentistry. Orientation of maxillary cast in the articulator acts as a baseline from which further steps for occlusal rehabilitation of the patients are carried out. Recording and transferring of the occlusal cant to articulators require facebow. How to cite this article Anusha CV, Singh AA, Sam G, Sangwan B, Shilpa M, Kamath AG. Evaluation of Two Facebow/Semi-adjustable Articulator Systems for Orienting Maxillary Cast on Articulators: A Pilot Study. J Contemp Dent Pract 2016;17(4):327-330

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Evaluation of a New Intraoral Paralleling Device for Creating Guiding Planes: A Pilot Study

The Journal of Contemporary Dental Practice ◽

10.5005/jcdp-11-1-65 ◽

2010 ◽

Vol 11 (1) ◽

pp. 65-72 ◽

Cited By ~ 2

Author(s):

Alessandra Buhler Borges ◽

Alexandre Luiz Souto Borges ◽

Eduardo Shigueyuki Uemura ◽

Tarcisio José de Arruda Paes-Júnior ◽

Rubens Nisie Tango ◽

...

Keyword(s):

Pilot Study ◽

Minimum Degree ◽

Small Deviation ◽

Occlusal Plane ◽

Second Molar ◽

Significant Difference ◽

Distal Surface ◽

Abutment Teeth ◽

Group 2 ◽

Group 1

Abstract Aim The aim of the study was to assess the accuracy of a new intraoral paralleling device for creating proximal guiding planes for removable partial dental prostheses. Methods and Materials Thirty gypsum casts were divided into two groups in which the proximal surfaces of selected teeth were prepared using either a surveying device (Group 1) or the new ParalAB paralleling device (Group 2). In each cast guiding planes were prepared on the distal surface of the maxillary left canine (A), on the mesial and distal surfaces of the maxillary left second molar (B and C), and on the distal surface of the maxillary right canine (D). Each prepared surface formed an angle related to the occlusal plane that was measured five times and averaged by one operator using a tridimensional coordinate machine. Results The mean guiding plane angles (± standard deviation) for the prepared surfaces were A=91.82° (±0.48°), B=90.47° (±0.47°), C=90.21° (±0.76°), and D=90.50° (±0.73°) for the dental surveyor (Group 1) and A=92.18° (±0.87°), B=90.90° (±0.85°), C=90.07° (±0.92°), and D=90.66° (±0.76°) for the ParalAB paralleling device (Group 2). A two-way ANOVA, Tukey's, and Levène's tests (at p<0.05) revealed statistically significant differences among surfaces prepared by both groups and that one surface(A in Group 2) was more parallel to the path of insertion than the other surfaces. Conclusions The ParalAB device was able to prepare parallel surfaces and despite significant difference between groups, the ParalAB presented a small deviation from absolute parallelism and can be considered a valid method to transfer guide plans in the fabrication of removable partial dentures. Clinical Significance The preparation of suitable guiding planes on abutment teeth during the fabrication of removable partial dentures is dependent on the ability of the operator and requires considerable chair time. When multiple teeth are involved, achieving parallelism between abutment surfaces can be technically challenging, especially in posterior regions of the mouth. The ParalAB prototype intraoral paralleling device can aid the clinician during the preparation of accurate guiding planes with a minimum degree of occlusal divergence. Citation Borges ALS, Borges AB, Uemura ES, Paes-Júnior TJ, Tango RN, Araújo JEJ, Kimpara ET. Evaluation of a New Intraoral Paralleling Device for Creating Guiding Planes: A Pilot Study. J Contemp Dent Pract [Internet]. 2010 Jan; 11(1):065-072. Available from: http://www.thejcdp. com/journal/view/volume11-issue1-borges.

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A pilot trial on lithium disilicate partial crowns using a novel prosthodontic Functional Index for Teeth (FIT)

10.21203/rs.2.14102/v4 ◽

2019 ◽

Author(s):

Edoardo Ferrari Cagidiaco ◽

Simone Grandini ◽

Cecilia Goracci ◽

Tim Joda

Keyword(s):

Clinical Performance ◽

Pilot Trial ◽

Lithium Disilicate ◽

Bone Biology ◽

Functional Index ◽

Posterior Teeth ◽

Significant Difference ◽

Group 2 ◽

Technical Complication ◽

Level Of Significance

Abstract Background Lithium disilicate is now a well accepted material for indirect restorations. The aim of this trial was to evaluate two lithium disilicate systems using a novel prosthodontic Functional Index for Teeth (FIT).Methods Partial adhesive crowns on natural abutment posterior teeth were made on sixty patients (clinicaltrial.gov # NCT 01835821). Patients were divided into two groups: Group 1 e.max press (Ivoclar), Group 2 LiSi press (GC Co.). The restorations were followed-up for 3 years. The FIT is composed of seven variables (Interproximal, Occlusion, Design, Mucosa, Bone, Biology and Margins), each of them to be evaluated using a 0-1-2 scoring scheme. The Mann-Whitney ‘U’ test was applied. The level of significance was set at p<0,05.Results Survival rate was 100%, without any biological or technical complication. No statistically significant difference emerged between the two groups in any of the assessed variables (p>0.05).Conclusions The results showed that it is possible to evaluate the clinical performance of partial crowns using FIT. The FIT proved to be an effective tool to foresee the possible risk of failures and to monitor the performance of the restorations at each recall. The two lithium dislocate materials showed same results after 3 years of clinical service.

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FEATURES OF HEMATOLOGICAL INDICES IN PATIENTS WITH IMPAIRED CARDIAC FUNCTION IN UP-TO-DATE CLINICAL PRACTICE

Clinical & experimental pathology ◽

10.24061/1727-4338.xix.4.74.2020.11 ◽

2021 ◽

Vol 19 (4) ◽

Author(s):

V.K. Tashchuk ◽

R.A. Nesterovska ◽

V.O. Kalarash

Keyword(s):

New York ◽

White Blood Cells ◽

Heart Association ◽

Functional Class ◽

Hematological Indices ◽

Neutrophil Lymphocyte Ratio ◽

Versus Group ◽

Significant Difference ◽

Group 2 ◽

Group 1

Purpose – to investigate the distribution of hematological indices in patients withcardiac insufficiency.Material and methods. Data of 26 case histories with diagnosis of IHD have beenanalyzed. Patients with stable angina pectoris of II-III functional class (FC), Diffusecardiosclerosis, complicated in 17 patients with syndromic manifestations of HF II-IIIFC according to New York Heart Association (NYHA), made up group 1, and 9 patientswithout CH -group 2. Of the group 1 surveyed, there were 8 men and 9 women. Ratioindex of leucocytes and erythrocyte sedimentation rate (ESR): L/ESR=L×ESR/100;Neutrophil-lymphocyte ratio index (N/Li); Lymphocyte to monocyte ratio index (Li / Mo);Lymphocyte to eosinophil index (Li/ E) was used among hematological markers.Results. Analyzing the haemogram data, it was found that group 1 patients, unlike group2 patients, had a significantly higher overall white blood cell count (7,96±1,73) × 109and (4,22 ± 0,24) × 109; p<0,05 due to the number of neutrophils (69,41 ± 6,21) % ascompared to group 2 (51,78±1,79)%; p<0,05 as well as a lower level of lymphocyteswas defined in group 1 (22,06±4,07)% versus group 2 (38,55±1,01)%; p<0,05. In genderstudies, men show elevated levels of eosinophils (4,12±0,83)%, as opposed to women(1,56±0,73) %; p<0,05 and lower level of lymphocytes (18,38±1,69)% versus (25,33±2,24)%; p<0,05 and women had a high level of total white blood cells (9,36±0,66) ×109 thanmen (6,36±0,99)×109; p<0,05, in particular lymphocytes. Analysis of hematologicalindices showed that there was a statistically significant difference in determining theN / Li index, which was increased in group 1 patients (3,28±0,78) у.о versus group 2(1,34±0,05) у.о, p<0,05.Conclusion. In gender comparisons, there is an increase in lymphocytes among womencompared to men, so we can assume that women are less susceptible to systemicinflammation. The increase in the N/Li index ratio is due to severe cardiovascularconsequences among patients with coronary heart disease complicated by heart failure.

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Skin color and investment performance in South Africa's mutual funds industry

Review of Behavioral Finance ◽

10.1108/rbf-05-2020-0115 ◽

2020 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Nixon S. Chekenya ◽

Shingirai Sikomwe

Keyword(s):

South Africa ◽

Statistical Difference ◽

White Male ◽

Mean Difference ◽

Test Results ◽

Ceteris Paribus ◽

Content Type ◽

Fund Managers ◽

Significant Difference ◽

Level Of Significance

PurposeUsing data for the period 1965–2016, we investigate whether there are systematic differences between the investment performance of Black fund managers and those of other races in South Africa and whether investors recognize these differences. The two-tailed test results show that there is no significant difference between the two means considering the 12 months yield return at a hypothesized mean difference of zero. There is no statistical difference at 5% level of significance implying that the performance of Black fund managers is as equally as that of managers of other races. Our results also show that the percentage of Black fund managers in South Africa is still too low even as the workforce gets diverse. There's no single explanation for what is happening in this industry. The findings cannot be explained by differences in fund characteristics such as age, total assets under management or expenses or from the performance lenses. The results seem hard to reconcile with an explanation of differences in portfolio characteristics such as return volatility or market, size, value and momentum exposures.Design/methodology/approachWe test the glass cliff hypothesis by employing conditional logistic regression (CLR). The approach enables the use of case/control style of analysis where White/majority fund managers are the control population and professional minorities are the case group. The selection of these as fund managers is our event or outcome variable. To test savior effect hypothesis, we employ analysis of variance (ANOVA). The technique enables us to compare variances between the groups: when a White male fund manager replaces a professional minority, when a White male fund manager replaces a White male fund manager and when a professional minority replaces a professional minority.FindingsOur analyses so far have documented a woeful underrepresentation of Black fund managers in South Africa's mutual funds industry. We explore potential explanations for these trends. Our analysis is meant to be suggestive. Are Blacks, women, people of color and ethnic minorities finding success in the investment industry? Are they having rewarding and fulfilling careers? Or is the industry still homogenous (just a White man's world) with a thin veneer of diversity layered on for public relations effect? The percentage of Black fund managers in South Africa is still too low even as the workforce gets diverse. There is no single explanation for what is happening in this industry. The findings cannot be explained by differences in fund characteristics such as age, total assets under management or expenses or from the performance lenses. Also, the results seem hard to reconcile with an explanation of differences in portfolio characteristics such as return volatility or market, size, value and momentum exposures.Research limitations/implicationsThe two-tailed test results show that there is no significant difference between the two means considering the 12 months yield return at a hypothesized mean difference of zero. There is no statistical difference at 5% level of significance. Our results so far establish that, ceteris paribus, the performance of Black fund managers is as equally as that of managers of other races.Practical implicationsThe two-tailed test results show that there is no significant difference between the two means considering the 12 months yield return at a hypothesized mean difference of zero. There is no statistical difference at 5% level of significance. Our results so far establish that, ceteris paribus, the performance of Black fund managers is as equally important as that of managers of other races.Social implicationsThe two-tailed test results show that there is no significant difference between the two means considering the 12 months yield return at a hypothesized mean difference of zero. There is no statistical difference at 5% level of significance. Our results so far establish that, ceteris paribus, the performance of Black fund managers is as equally important as that of managers of other races.Originality/valueThis paper investigates whether there are systematic differences between the investment performance of Black fund managers and those of other races in South Africa and whether investors recognize these differences. Our hypothesis is that due to Broad-Based Black Economic Empowerment (BBBEE) laws in the country and possibly, due to a perception of discrimination in the market, it is only Black fund managers with superior fund management skills that enter the profession. As such, we expect to find superior performance among Black fund managers. We also conjecture that investors recognize this phenomenon and reward Black fund managers with more fund flows and more investment mandates than others.

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Effect of Using Scientific Stations Strategy in Developing Deductive Thinking of Intermediate School Students in General Sciences

International Journal of Early Childhood Special Education ◽

10.9756/int-jecse/v12i2.201054 ◽

2020 ◽

Vol 12 (2) ◽

pp. 35-48

Author(s):

Heba Mohammed Saleh Al-Hafidh

Keyword(s):

Statistical Processing ◽

Mean Difference ◽

Control Group ◽

Intermediate School ◽

School Students ◽

Statistical Significant Difference ◽

Significant Difference ◽

The Mean ◽

Level Of Significance ◽

Experimental Group

The study aimed to know the effect of using the Scientific stations strategy in developing Deductive thinking of intermediate school students in the science subject. To achieve the aim of the research, the researcher used experimental design with two equal groups, the research sample consisted of (65) intermediate-grade students in Al Nidhal school for boys represented by (30) students of the experimental group and (35) students for the control group, the researcher equivalence of the two research groups with a set of variables including (Intelligence, parents ’educational level, previous achievement, age calculated by months and pre-test for Deductive thinking), to verify the research aim the researcher put the two hypotheses as following : 1- There is no statistical significant difference at the level of significance (0.05) between the scores mean of the members of the experimental group and the members of the control group in the post test of Deductive thinking. 2- There is no statistical significant difference at the level of significance (0.05) between the mean difference between the (pre and post) tests of both experimental and control groups in the Deductive thinking test. To verify the research hypotheses, the researcher prepared a test for Deductive thinking consisting of (20) items the researcher applied the test of Deductive thinking, collected the data, and tabulated it in tables for statistical processing and the results indicated: 1- There is a statistical significant difference between the scores mean of students in both groups in the Deductive thinking test and in favor of the experimental group. 2- There is a statistical significant difference between the mean difference between the two tests (pre - post) and in favor of the experimental group.

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A pilot trial on lithium disilicate partial crowns using a novel prosthodontic Functional Index for Teeth (FIT)

10.21203/rs.2.14102/v2 ◽

2019 ◽

Author(s):

Edoardo Ferrari Cagidiaco ◽

Simone Grandini ◽

Cecilia Goracci ◽

Tim Joda

Keyword(s):

Clinical Performance ◽

Pilot Trial ◽

Lithium Disilicate ◽

Bone Biology ◽

Functional Index ◽

Posterior Teeth ◽

Significant Difference ◽

Group 2 ◽

Technical Complication ◽

Level Of Significance

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Motivation of elderly with Parkinson's disease submitted to functional training, aerobic exercise and exergame

Acta Fisiátrica ◽

10.11606/issn.2317-0190.v25i3a162643 ◽

2018 ◽

Vol 25 (3) ◽

Author(s):

Sara Roza Gomes ◽

Karen Valadares Trippo ◽

Daniela Oliveira Guimarães ◽

Jamary Oliveira Filho ◽

Daniel Dominguez-Ferraz

Keyword(s):

Physical Exercise ◽

Training Group ◽

Older Individuals ◽

Bicycle Exercise ◽

Chi Square ◽

Functional Training ◽

Significant Difference ◽

Chi Square Test ◽

Group 2 ◽

Level Of Significance

It is recommended that patients with Parkinsons disease (PD) perform physical exercise throughout their lives. Exercise should slow disease progression and motivate the patient. Objective: Verify and compare the motivation of elderly with PD submitted to functional training, stationary bicycle exercise and exergame. Method: A randomized clinical trial was developed at a referral center. Group 1 (G1) performed functional training, group 2 (G2) trained with stationary bicycle and group 3 (G3) played on Xbox 360 with Kinect sensor. At the end of training, an interview was conducted by a single non-blind investigator to evaluate patient motivation about therapeutic exercise programs they were submitted to. For each question there were four answers options: I was not motivated, I was not very motivated, I was motivated and I was very motivated. The variables were summarized in median and interquartile range and in absolute and relative frequencies. The Pearson Chi-square test was used for statistical inference. The level of significance was 5% (p <0.05). Fifty-three older people with PD have participated. Results: Many participants have reported that exercise (G1: 72%, G2: 53%, G3: 44%) and the physiotherapist (G1: 83%, G2: 76%, G3: 94%) were very motivating. Only two participants of G2 rated exercise as not very motivating. However, no significant difference was found between the three groups. Conclusion: Older individuals with PD considered functional training, bicycle exercise and exergame as motivating modalities of physical exercise.

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Removal Torque Analyses of Two Self-drilling Orthodontic Temporary Anchorage Devices (TADs)

Dental Research and Management ◽

10.33805/2572-6978.130 ◽

2019 ◽

pp. 64-67 ◽

Cited By ~ 1

Author(s):

Mahfud F Mohamed

Keyword(s):

Occlusal Plane ◽

Coil Spring ◽

Removal Torque ◽

Temporary Anchorage Devices ◽

Significant Difference ◽

Maxillary Molar ◽

Orthodontic Patients ◽

Group 2 ◽

The Stability ◽

The Moment

Stability of miniscrews or Temporary Anchorage Devices (TADs) is an essential factor for successful application in orthodontics. Miniscrews removal torque can be used as an indicator of miniscrews stability. The objective of this work was to compare removal torque between self-drilling tapered mini-screws and cylindrical miniscrews. Materials and Methods: Two groups of TADs were inserted in the maxillae of orthodontic patients to provide stationary anchorage for front teeth retraction. Group 1: 20 tapered self-drilling miniscrews, Group 2: 20 cylindrical self-drilling miniscrew. Split mouth technique was used. All of the TADs were inserted parallel to the occlusal plane, between roots of the 2nd maxillary premolar and 1st maxillary molar. The TADs were immediately loaded with constant and continuous load using 8 mm long heavy short Nickel Titanium coil spring. The coil spring was stretched between the heads of the two types of TADs and crimpable hooks that fixed on arch wire just distal to the anterior six maxillary teeth. After complete retraction of the anterior maxillary teeth, TADs were removed using torque adjustable screw-removal. At the moment of movement of the TAD the torque was recorded in Newton Centimeter (Ncm). Results: Mann Whitney U Test resulted in a significant difference between the two groups, indicating that cylindrical TADs had significantly higher removal torque than tapered TADs (means were 3.20 Ncm ± 0.20 and 2.70 Ncm ± 0.10 respectively). Conclusion: Physical properties have a considerable influence on the stability of the TADs. Cylindrical TADs are showed more mechanical interlock into the bone.

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Face-to-face versus online clinically integrated EBM teaching in an undergraduate medical school: a pilot study

BMJ evidence-based medicine ◽

10.1136/bmjebm-2021-111776 ◽

2021 ◽

pp. bmjebm-2021-111776

Author(s):

Bharathy Kumaravel ◽

C Stewart ◽

Dragan Ilic

Keyword(s):

Pilot Study ◽

Medical School ◽

Online Teaching ◽

Mean Difference ◽

Formative Assessments ◽

Completion Rates ◽

Undergraduate Medical Students ◽

Face To Face ◽

Models Of Teaching ◽

Significant Difference

ObjectivesThe aim of this study was to test the feasibility and effectiveness of two models (face-to-face vs online teaching) of clinically integrating evidence-based medicine (EBM) teaching in an undergraduate medical school.Design and settingA pilot study of face-to-face versus online EBM teaching.ParticipantsThis study focused on undergraduate medical students who entered the University of Buckingham Medical School MBChB course in 2016 (n=65). Of the 65 students, 45 received face-to-face teaching, while 20 received online teaching.Main outcome measuresFeasibility was assessed by the ability to deliver the content, students’ engagement during teaching and their completion rates in formative assessments—Assessing Competency in EBM (ACE) tool, and educational prescriptions (EPs). Effectiveness of teaching for the two models was compared by evaluating students’ performance in the formative assessments and in the summative final professional examination and final year EBM objective structured clinical examination (OSCE).ResultsWe had similar students’ engagement and completion rates in formative assessments in both models. Students receiving face-to-face teaching performed better in EPs (mean difference=−2.28, 95% CI: −4.31 to –0.26). There was no significant difference in performances in the ACE tool (mean difference=−1.02, 95% CI: −2.20 to 0.16); the written final professional exams (mean difference=−0.11, 95% CI: −0.65 to 0.44) and the EBM OSCE station (mean difference=−0.81, 95% CI: −2.38 to 0.74).ConclusionsIt was feasible to deliver both models of clinically integrated EBM teaching. While students in the face-to-face model scored higher in EPs; there was no significant difference between the two models of teaching as measured by performances in the ACE tool or the summative assessments.

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Travelling Across Time Zones With Type 1 Diabetes: A Pilot Study Comparing Insulin Degludec With Insulin Glargine U100

10.2337/figshare.16776259.v1 ◽

2021 ◽

Author(s):

Wendy C. Bevier ◽

Kristin N. Castorino ◽

Ceara Axelrod ◽

Gal Haroush ◽

Christian C. Farfan ◽

...

Keyword(s):

New York ◽

Type 1 Diabetes ◽

Pilot Study ◽

Insulin Degludec ◽

Multiple Time ◽

Time Zone ◽

Significant Difference ◽

Time Zones ◽

Glycemic Outcomes

Objective For people with type 1 diabetes, there are limited evidence-based resources to support self-management when traveling across multiple time zones. Here, we compared glycemic control on Insulin Degludec versus GlargineU100 as the basal insulin for adults using multiple daily injections (MDI) while travelling across multiple time zones. Research Design and Methods This randomized crossover pilot study compared Insulin Degludec versus Glargine U100 for adults with type 1 diabetes using MDI insulin during long-haul travel to and from Hawaii to New York. Insulin Degludec was administered daily at the same time regardless of time zone and Glargine was administered per travel algorithm. Primary endpoint was percent time in range (TIR) between 70-140 mg/dl during the initial 24 hours after each direction of travel. Secondary endpoints include standard continuous glucose monitoring metrics, jet lag, fatigue and sleep. Results A total of 25 participants were enrolled in the study [56% female, age 35 ±14.5 (mean ±SD) years, HbA1C of 7.4 ±1.2% (57±13.1 mmol/mol), diabetes duration of 20.6 ±15 years). There was no significant difference in glycemic outcomes between the two arms of the study including TIR, hypoglycemia or hyperglycemia. Neither group achieved >70% TIR 70-180 mg/dL during travel. Jetlag was greater on Glargine U100 in Eastward travel but not Westward. Fatigue was greater after Westward travel on Glargine. Sleep was not significantly different between basal insulins. Conclusion In adults with type 1 diabetes using MDI of insulin and travelling across multiple time zones, glycemic outcomes were similar comparing Insulin Degludec and Glargine U100.

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