scholarly journals The Effects of Magnification and Operator’s Experience on the Quality of Preclinical Dental Procedures

2021 ◽  
pp. 16-23
Author(s):  
Danielle Wajngarten ◽  
Júlia Margato Pazos ◽  
Patricia Petromilli Nordi Sasso Garcia
Keyword(s):  
Factor Analysis ◽  
Analysis Of Variance ◽  
Class I ◽  
Cavity Preparation ◽  
Response Variable ◽  
Naked Eye ◽  
Dental Procedures ◽  
Experimental Laboratory ◽  
Experienced Operator

Aims: This study evaluated the effect of magnification on the quality of preclinical class I cavity preparations according to operator’s experience. Methodology: This was an experimental laboratory study. The response variable was the quality of Class I cavity preparations evaluated by the Class I Cavity Preparation Assessment - COCA. Class I cavity preparations were performed in all artificial first molars under four conditions: unaided visualization, using a simple loupe, using a Galilean loupe, and using a Keplerian loupe (N=640). The two-factor analysis of variance was performed (α=0.05). Results: No interactions between operator’s experience and magnification device were found (p>0.05). Although, higher quality scores were given to cavity preparations in tooth #36 using the Galilean loupe compared to naked eye (p<0.01). The more experienced operator received higher quality scores for tooth #46 regardless of the magnification system used (µexperienced=7.0±2.3 and µinexperienced=5.4±2.4). Conclusion: The use of magnification devices did not influence the quality of class I cavity preparations performed on tooth #16, 26, 46. Galilean loupe was associated with improved quality of the cavity preparation performed on tooth #36, and the operator’s experience influenced the quality of the preparation on tooth #46.

scholarly journals Development and Validation of Class I Preparation and Restoration Quality Assessment Methods

2021 ◽  
pp. 18-23
Author(s):  
Danielle Wajngarten ◽  
Júlia Margato Pazos ◽  
Tamíris da Costa Neves ◽  
Patricia Petromilli Nordi Sasso Garcia
Keyword(s):  
Quality Assessment ◽  
Composite Resin ◽  
Intraclass Correlation ◽  
Class I ◽  
Cavity Preparation ◽  
Experimental Laboratory ◽  
Composite Resin Restoration ◽  
Development And Validation ◽  
Descriptive Statistical Analysis

This study sought to develop and validate two methods of quality assessment, one for Class I cavity preparation and another for composite resin restoration. This was an experimental laboratory study. The methods are named Class I Cavity Preparation Assessment – COCA and Class I Cavity Restoration Assessment – COCRA. During the development of the methods, 5 items were elaborated for COCA and 10 items for COCRA. Each item should be classified as appropriate, partially appropriate, or inappropriate. For each method, after evaluation, all item values should be added with a maximum possible score of ten points. The reliability of the COCA and COCRA was estimated through intra-observer reproducibility. For the methods application, 80 Class I cavity preparation and restoration in first molars were evaluated. A descriptive statistical analysis was performed, and the intra-observer concordance was estimated using the intraclass correlation coefficient (ρ). As a result, it was possible to observe that the reproducibility for COCA of evaluator 1 (ρ=0.76) and evaluator 2 (ρ=1.00) was classified as good and excellent, respectively. The reproducibility for COCRA of evaluator 1 (ρ=0.99) and evaluator 2 (ρ=0.77) was classified as excellent and good, respectively. It was concluded that COCA and COCRA were valid and reliable for the assessment of quality of Class I cavity preparation and restoration.

scholarly journals Improving Strength and Quality of Epitendinous Repairs

Hand ◽  
2018 ◽  
Vol 15 (4) ◽  
pp. 495-501
Author(s):  
Angel Farinas ◽  
Michael Stephanides ◽  
Steven Schneeberger ◽  
Alonda Pollins ◽  
Nancy Cardwell ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Analysis Of Variance ◽  
Statistical Significance ◽  
Single Factor ◽  
Single Thread ◽  
A2 Pulley ◽  
Suture Thread ◽  
Single Factor Analysis ◽  
Single Suture

Background: Epitendinous sutures not only join the 2 severed tendon edges but also supply strength and support to the repair. Multiple techniques have been described, but none of them include another thread of suture. This could potentially increase the strength of the repair without affecting gliding. Methods: Caprine tendons were harvested, transected, and sutured with 6-0 Prolene. Four groups were created: single thread running (SR), single thread locking (SL), double thread running (DR), and double thread locking (DL). An Instron 5542 was used to pull the repaired tendons apart, and the energy at the break was calculated (gf/mm). For gliding resistance, we harvested a human A2 pulley. A pre- and postrepair value was obtained, and a ratio was elaborated. A single-factor analysis of variance and independent sample t tests were performed. Results: The SR group had a mean energy at break of 9339.71 ± 1630.212 gf/mm; the SL group, 9629.96 ± 1476.45 gf/mm; and the DR group, 9600.221 ± 976.087 gf/mm, with no statistical significance. The DL group was significantly higher at 14 740.664 ± 2596.586 gf/mm ( P < .05). When comparing SR with DL for gliding, SR had less than half of the resistance than DL (0.018 ± 0.004 and 0.049 ± 0.015 N/mm, respectively), with statistical significance ( P < .05). Conclusion: Using a single suture thread for running epitendinous repair is no different than locking with a single thread or using an extra thread in a running fashion. Performing a double suture thread with a locking technique is significantly stronger than the previously mentioned repairs, with the disadvantage of more resistance at the pulley.

scholarly journals MATERIALS AND METHODS OF THE STUDY OF INFLUENCE OF AGROTECHNICAL METHODS ON SENSORY CHARACTERISTICS OF TECHNICAL SORTS OF GRAPE

2017 ◽  
Vol 2 ◽  
pp. 34-41
Author(s):  
Oksana Tkachenko ◽  
Aleksandr Pashkovskiy ◽  
Andrey Shtirbu
Keyword(s):  
Experimental Data ◽  
Factor Analysis ◽  
Field Experiment ◽  
Analysis Of Variance ◽  
Sensory Analysis ◽  
Sensory Characteristics ◽  
Mathematical Processing ◽  
Main Components ◽  
To Receive

The topicality of using the sensory analysis of berries in enological practice at planning of agrotechnical complex at vineyard to receive the certain style and quality of production was grounded. For study of the influence of agrotechnical methods on sensory characteristics of technical sorts of grape Zagrey and Fragrant, selected by NSC “IVaW named after V.E. Tairov” (Ukraine), there was elaborated the algorithm of research, including field experiment and laboratory sensory analysis. The method of organoleptic analysis of berries, consisted of 20 parameters for assessment of visual, tactile and gustatory properties of pulp, peel and seeds, was approbated. Mathematical processing of experimental data was carried out by the methods of one- and two-factor analysis of variance and analysis of main components in the environment of package of applied programs MS Excell 2010, Statistica Statsoft ver. 7. 0 (Tulsa, USA). The sensory descriptors, characterizing the quality of studied sorts of grape, were determined. It was established, that agrotechnical methods of planting grape bushes influenced the sensory characteristics of berries of studied sorts.

Semi-automated methods for 3-D reconstruction of macromolecular complexes

1995 ◽  
Vol 53 ◽  
pp. 42-43
Author(s):  
B. Carragher ◽  
M. Whittaker
Keyword(s):  
Three Dimensional ◽  
Time Saving ◽  
Macromolecular Complexes ◽  
Symmetry Properties ◽  
Dimensional Reconstruction ◽  
Experienced Operator ◽  
Projection Images ◽  
The Individual ◽  
Natural Symmetry

Techniques for three-dimensional reconstruction of macromolecular complexes from electron micrographs have been successfully used for many years. These include methods which take advantage of the natural symmetry properties of the structure (for example helical or icosahedral) as well as those that use single axis or other tilting geometries to reconstruct from a set of projection images. These techniques have traditionally relied on a very experienced operator to manually perform the often numerous and time consuming steps required to obtain the final reconstruction. While the guidance and oversight of an experienced and critical operator will always be an essential component of these techniques, recent advances in computer technology, microprocessor controlled microscopes and the availability of high quality CCD cameras have provided the means to automate many of the individual steps.During the acquisition of data automation provides benefits not only in terms of convenience and time saving but also in circumstances where manual procedures limit the quality of the final reconstruction.

Pengaruh Pemberian Moringa oleifera Terhadap Kuantitas dan Kualitas Semen Sapi Peranakan Ongole

2020 ◽  
Vol 7 (2) ◽  
pp. 119
Author(s):  
Lukman Affandhy ◽  
Muchamad Luthfi ◽  
Dian Ratnawati ◽  
Frediansyah Firdaus
Keyword(s):  
Data Analysis ◽  
Analysis Of Variance ◽  
Research Method ◽  
Moringa Oleifera ◽  
The Third ◽  
Randomized Design ◽  
Leaf Powder ◽  
Completely Randomized Design ◽  
Second Period

ABSTRAK  Penelitian bertujuan untuk mengetahui pengaruh pemberian bubuk daun Moringa oleifera (MO) terhadap kuantitas dan kualitas semen sapi peranakan ongole (PO). Metode penelitian menggunakan percobaan lapang dengan rancangan acak lengkap dengan tiga perlakuan pemberian MO sebesar 0 kg/ekor/hari (P1); 0,05 kg/ekor/hari (P2) dan 0,1 kg/ekor/hari (P3). Analsis data menggunakan one way analysis of variance. Masing-masing perlakuan terdiri atas empat ekor dengan tiga periode pengamatan sebagai ulangan, yaitu periode pertama dan ketiga tanpa MO, dan periode kedua diberikan MO pada P2 dan P3. Hasil penelitian menunjukan bahwa volume dan pH semen perlakuan P1, P2 dan P3 tidak berbeda semua periode pengamatan. Motilitas massa spermatozoa P2 dan P3 periode kedua dan ketiga menunjukan nilai +++ berbeda nyata (P<0,05) dibandingkan dengan P1 (++); motilitas individu  perlakuan P1 menunjukkan nilai terendah 60,56±2,94 % (P<0,05) dibandingkan P2 dan P3 pada periode kedua dan ketiga (75,50±2,29 dan 72,50±2,34%). Konsentrasi spermatozoa P2 dan P3 periode kedua dan ketiga menunjukkan rata-rata  >1.350 juta/ml berbeda nyata (P<0,05) daripada P1 (876±152juta/ml), sedangkan total spermatozoa motil menunjukkan nilai tertinggi 5.647±829 juta/ml pada P3 periode kedua.Viabilitas spermatozoa P2 dan P3 menunjukkan nilai >88-89 % beda nyata (P<0,05) daripada P1 (<84 %) pada periode kedua dan ketiga, sedangkan nilai abnormalitas spermatozoa yang terbaik adalah P2 sebesar 4,30% pada periode kedua dan P3 sebesar 5,33% pada periode ketiga. Disimpulkan pemberian bubuk daun MO dengan dosis 0,1 kg/ekor/hari dapat memperbaiki kuantitas dan kualitas semen (viabilitas dan total spermatozoa motil) sapi pejantan PO.Kata kunci:  kuantitas dan kualitas semen, Moringa oleifera, sapi pejantan ABSTRACTThe research aimed to determine the effect of Moringa oleifera (MO) leaf powder on the quantity and quality of semen of ongole crossbreed. The research method used was a field experiment with a completely randomized design with three treatments giving MO of 0 kg/head/day (P1); 0.05 kg/head/day (P2) and 0.1 kg/head/day (P3). Each treatment consisted of four heads with three periods of observation as replications, namely the first and third periods without MO, and the second period was given MO on P2 and P3. Data analysis used a one-way analysis of variance. The results showed that the volume and pH of semen treated P1, P2, and P3 didn’t different in all observation periods. The second and third period spermatozoa mass motility of P2 and P3 showed that the value of +++ was significantly different (P<0.05) compared to P1 (++); Individual motility of P1 treatment showed the lowest value 60,56±2,94 % (P<0.05) compared to P2 and P3 in the second and third periods (75,50±2,29 and 72,50±2,34%). The second and third periods of P2 and P3 spermatozoa concentrations showed an average of >1,350 million/cc significantly different (P<0.05) than P1 (876±152 million/cc), while the total motile spermatozoa showed the highest value of 5,647±829 million/cc in the second period P3. The spermatozoa viability of P2 and P3 showed values >88-89% significantly different (P<0.05) than P1 (<84%) in the second and third periods, while the best spermatozoa abnormalities were P2 at 4.30% in the second period and P3 at 5.33% in the third period. It was concluded that the giving of MO leaf powder at a dose of 0,1 kg/head/day could improve the quantity and quality of semen (viability and total motile spermatozoa) of Ongole Crossbreed bulls. Keywords: bulls, Moringa oleifera, quantity and quality of semen

The Effects of Exercise Commitment Facilitated by Service Quality of Smartphone Exercise Applications on Continued Exercise Intention

2019 ◽  
Vol 118 (1) ◽  
pp. 14-19
Author(s):  
Boo-Gil Seok ◽  
Hyun-Suk Park
Keyword(s):  
College Students ◽  
Factor Analysis ◽  
Regression Analysis ◽  
Statistical Analysis ◽  
Correlation Analysis ◽  
Service Quality ◽  
Frequency Analysis ◽  
Primary Data ◽  
Exercise Intention

Background/Objectives: The purpose of this study is to examine the effects of exercise commitment facilitated by service quality of smartphone exercise Apps on continued exercise intention and provide primary data for developing and/or improving smartphone exercise Apps. Methods/Statistical analysis: A questionnaire survey was conducted amongst college students who have experiences in using exercise App(s) and regularly exercise. The questionnaire is composed of four parts asking about service quality, exercise commitment, continued exercise intention, which were measured with a 5-point Likert Scale, and demographics. Frequency analysis, factor analysis, correlation analysis, and regression analysis were carried out to analyze the obtained data with PASW 18.0.

scholarly journals A questionnaire to measure the quality of midwifery care in the postpartum period from women’s point of view: development and psychometric testing of MMAYpostpartum

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Mirjam Peters ◽  
Petra Kolip ◽  
Rainhild Schäfers
Keyword(s):  
Factor Analysis ◽  
Postpartum Period ◽  
Psychometric Testing ◽  
Personal Control ◽  
Sample Survey ◽  
Measuring Instruments ◽  
Cronbach’S Alpha ◽  
Midwifery Care ◽  
Cronbach's Alpha

Abstract Background Home postpartum care is a major part of midwifery care in Germany. The user perspective plays an increasingly important role in the evaluation of health services, but there is a lack of valid and theoretically based measuring instruments, especially in midwifery care. The aim of this study was to develop and validate an instrument for measuring quality of midwifery care in the postpartum period from the perspective of women. Methods The following steps were taken to achieve this: (1) definition of the goals of midwifery work; (2) literature-based item development; (3) item selection based on a pre-test (n = 16); (4) item reduction and investigation of factor structure by means of explorative factor analysis (EFA; n = 133);(5) second EFA (n = 741) and confirmatory factor analysis (CFA; n = 744) based on a split representative sample survey; (6) hypothesis-based testing of correlations to sociodemographic characteristics of women and to characteristics of care. Results Measurement of Midwifery quality postpartum (MMAYpostpartum) consists of three scales with a total of 17 items which were found to have acceptable internal consistency: Personal Control (Cronbach’s alpha = .80), Trusting Relationship (Cronbach’s alpha = .87) and Orientation and Security (Cronbach’s alpha = .78). CFA verified and confirmed three factors: CFI = .928, TLI = .914, RMSEA = 0.073. Conclusion MMAYpostpartum is a predominantly valid, reliable short tool for evaluating the quality of midwifery care postpartum. It can be used to evaluate midwifery care, to compare different care models and in intervention research. It thus supports the orientation of midwives’ work towards the needs of women and their families.

scholarly journals Validation and psychometric evaluation of the Dutch person-centred care of older people with cognitive impairment in acute care (POPAC) scale

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Annette Keuning-Plantinga ◽  
Evelyn J. Finnema ◽  
Wim Krijnen ◽  
David Edvardsson ◽  
Petrie F. Roodbol
Keyword(s):  
Factor Analysis ◽  
Cognitive Impairment ◽  
Quality Of Care ◽  
Confirmatory Factor Analysis ◽  
Older People ◽  
Root Mean Square ◽  
Acute Care ◽  
Mean Square ◽  
Confirmatory Factor

Abstract Background Person-centred care is the preferred model for caring for people with dementia. Knowledge of the level of person-centred care is essential for improving the quality of care for patients with dementia. The person-centred care of older people with cognitive impairment in acute care (POPAC) scale is a tool to determine the level of person-centred care. This study aimed to translate and validate the Dutch POPAC scale and evaluate its psychometric properties to enable international comparison of data and outcomes. Methods After double-blinded forward and backward translations, a total of 159 nurses recruited from six hospitals (n=114) and via social media (n=45) completed the POPAC scale. By performing confirmatory factor analysis, construct validity was tested. Cronbach’s alpha scale was utilized to establish internal consistency. Results The confirmatory factor analysis showed that the comparative fit index (0.89) was slightly lower than 0.9. The root mean square error of approximation (0.075, p=0.012, CI 0.057–0.092) and the standardized root mean square residual (0.063) were acceptable, with values less than 0.08. The findings revealed a three-dimensional structure. The factor loadings (0.69–0.77) indicated the items to be strongly associated with their respective factors. The results also indicated that deleting Item 5 improved the Cronbach’s alpha of the instrument as well as of the subscale ‘using cognitive assessments and care interventions’. Instead of deleting this item, we suggest rephrasing it into a positively worded item. Conclusions Our findings suggest that the Dutch POPAC scale is sufficiently valid and reliable and can be utilized for assessing person-centred care in acute care hospitals. The study enables nurses to interpret and compare person-centred care levels in wards and hospital levels nationally and internationally. The results form an important basis for improving the quality of care and nurse-sensitive outcomes, such as preventing complications and hospital stay length.

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