scholarly journals Step-by-step teaching method: improving learning outcomes of undergraduate dental students in layering techniques for direct composite resin restorations

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Jia-xue Yuan ◽  
Ke-yu Yang ◽  
Jing Ma ◽  
Zhen-zhen Wang ◽  
Qing-yu Guo ◽  
...  
Keyword(s):  
Composite Resin ◽  
Teaching Method ◽  
Dental Students ◽  
Control Group ◽  
Final Score ◽  
Composite Resin Restorations ◽  
Group Control Group ◽  
Experimental Group ◽  
Resin Restorations

Abstract Background Layering techniques for direct composite resin restorations might be complicated for inexperienced learners, as a number of materials and instruments are required at each step. The present study aimed to compare and assess the teaching effect of step-by-step and all-in-one teaching methods in layering techniques for direct composite resin restorations among undergraduate dental students. Methods A total of 68 junior dental students participated in this study, which was a prospective and single-blind trial. The students were randomly divided into a step-by-step group (experimental group, n = 34) and all-in-one group (control group, n = 34). The same teacher taught the two groups, ensuring a comparable teaching effect. The final score of each student was an average of scores by two experts who were blinded to the grouping. The scoring system was consisted by five parts. Each part was assigned scores of 3.0, 1.5, or 0. The total maximum score was 15 and minimum was 0. The total time taken by each group was also calculated. Results The values of the quality of tooth restorations evaluated by experts for step-by-step and all-in-one groups were 11.29 ± 2.13 from 15 and 9.00 ± 2.71 from 15 (t = 3.88, P < 0.001), respectively. In addition, the time spent by the experimental group was significantly lesser than that spent by the control group, which was 122.47 ± 2.82 and 137.18 ± 6.75 min, respectively (t = 11.72, p < 0.001). Conclusion With regard to the layering techniques for direct composite resin restorations, the outcomes were better in the step-by-step group than in the all-in-one group.

Effective Role of Emotions in Teaching

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Sujit Dhanraj Kumavat
Keyword(s):  
Teaching Methods ◽  
Teaching Method ◽  
Negative Emotion ◽  
Junior College ◽  
Control Group ◽  
Neutral Group ◽  
Group I ◽  
Group Control Group ◽  
Experimental Group

The objective of the present study was to find out the role of emotion in effective teaching of junior college students. The sample for the present research selected from the grantable junior college in Ahmednagar. For the research 11th class 90 students of Commerce faculty was selected. Among them 30 student selected for the positive emotion teaching group (Experimental group I). 30 students selected for the negative emotion (Experimental group II). And 30 students were selected for the neutral group (Control group III). The age range of the students were 17 to 18 years (M=35.00 SD=7.38). In the research Simple random method was used. The first hypothesis of the research was positive emotional teaching method high in English retention than negative and neutral teaching methods. Tolls 11th class English syllabus selected for the study. Result first result was showed that positive emotional teaching had significantly high English retention than the negative and neutral emotional teaching methods.

scholarly journals Comparison of shear bond strength of orthodontics brackets on composite resin restorations with different surface treatments

2013 ◽  
Vol 18 (4) ◽  
pp. 98-103 ◽  
Author(s):  
Alexandre Antonio Ribeiro ◽  
Ariane Vicente de Morais ◽  
Daniel Paludo Brunetto ◽  
Antonio Carlos de Oliveira Ruellas ◽  
Monica Tirre Souza de Araujo
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Testing Machine ◽  
Dental Enamel ◽  
Acrylic Resin ◽  
Orthodontic Brackets ◽  
Control Group ◽  
Post Test ◽  
Composite Resin Restorations ◽  
Resin Restorations

INTRODUCTION: Orthodontic patients frequently present composite resin restorations, however there are few studies that evaluate the best way for orthodontic bonding in this situation. OBJECTIVE: The objective of this work was to evaluate the bond strength of orthodontic brackets in resin restorations with surface treatment. METHODS: Fifty one bovine lower incisors were randomly divided into three groups. On the control group (CG) the brackets were bonded to dental enamel; on experimental groups, brackets were bonded to resin restoration with diamond drill treatment (EGT) and with no treatment (EGN). The teeth were placed in PVC tubes with autopolymerized acrylic resin. The shear test was performed in EMIC universal testing machine. The groups were submitted to ANOVA analysis of variance with Tukey post test to verify the statistical difference between groups (α = 0.05). RESULTS: CG (6.62 MPa) and EGT (6.82 MPa) groups presented similar results, while EGN (5.07 MPa) obtained statistically lower results (p < 0.05). CONCLUSION: Therefore, it is concluded that the best technique for bonding of orthodontic brackets on composite resin restorations is the performance of surface detritions.

The Use of Bur and Laser for Root Caries Treatment: A Comparative Study

2013 ◽  
Vol 38 (3) ◽  
pp. 290-298 ◽  
Author(s):  
V Geraldo-Martins ◽  
T Thome ◽  
M Mayer ◽  
M Marques
Keyword(s):  
Composite Resin ◽  
Significant Loss ◽  
Control Group ◽  
Strong Positive Correlation ◽  
Root Caries ◽  
Residual Caries ◽  
Caries Removal ◽  
Composite Resin Restorations ◽  
Resin Restorations

Summary This research analyzed the influence of bur and erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser caries removal on cavity characteristics and marginal seal of composite resin restorations. One hundred and forty human dental root samples were used. After in vitro root caries induction using Streptococcus mutans, the carious lesions were removed either by a conventional technique using burs (G1=control) or by using an Er,Cr:YSGG laser (λ=2.78 μm, 20 Hz, pulse duration≅140 μs, noncontact mode using a 600-μm tip) with the following power outputs: G2: 1.0 W; G3: 1.25 W; G4: 1.5 W; G5: 1.75 W; G6: 2.0 W; G7: 2.25 W; G8: 2.5 W; G9: 2.75 W; G10: 3.0 W; G11: 3.25 W; G12: 3.5 W; G13: 3.75 W; and G14: 4.0 W. Samples in the 14 groups (n=10) were conditioned with Clearfil SE Bond and restored with a flowable composite. They were then thermocycled (1000 cycles) and immersed into a 2% methylene blue solution for microleakage analysis. The data were statistically compared (analysis of variance or Spearman correlation tests; p≤0.05). The lased groups showed significantly greater microleakage indexes, cavity depths, and presence of residual caries than did those of the control group. There was a strong positive correlation between residual caries and microleakage. The results indicate that Er,Cr:YSGG laser irradiation is not a good alternative to the use of burs for root caries removal since it may cause a significant loss of marginal sealing in composite resin restorations.

The Influence of Different Base Materials on Marginal Adaptation of Direct Class II Composite Resin Restorations

2005 ◽  
Vol 288-289 ◽  
pp. 481-484
Author(s):  
Sung Ho Park ◽  
Yon Sang Cho ◽  
I.Y. Jung ◽  
Kwon Yong Lee ◽  
S.B. Jeon
Keyword(s):  
Mechanical Stress ◽  
Composite Resin ◽  
Base Material ◽  
Control Group ◽  
Marginal Adaptation ◽  
Base Materials ◽  
Before And After ◽  
Composite Resin Restorations ◽  
Entire Margin ◽  
Resin Restorations

The purpose of present study was to evaluate the influence of different base materials on the marginal integrity of posterior direct composite resin restorations. Conventional mesio-occluso-distal(MOD) cavity preparations, with margins in enamel and dentin, were prepared in 24 extracted human mandibular molars and randomly divided into four equal groups. One of three base materials (RMGI, compomer, flowable resin) was placed on the pulpal floors of the teeth of the groups. One group of teeth, which served as the control group, was not given any base material. Then, all teeth were restored with composite resin. The micromorphology of the tooth/restoration interfaces along the entire surfaces of the restorations was quantitatively analyzed using microscope at 150 magnifications immediately after finishing and after completion of thermo-mechanical stress. Marginal adaptation was assessed along the entire margin and % perfect margin (%PM) was calculated. The %PMs before and after thermo-mechanical stress in the groups were compared with Two- way ANOVA with Tukey test at the 95% confidence level. Before thermo-mechanical stress, there was no difference in marginal adaptation between groups. After the thermo-mechanical stress, the RMGI group showed the highest marginal adaptation rate among the tested groups. In compomer and flowable resin groups, the marginal adaptation was lower after thermomechanical stresses than before the stress (p<0.05).

scholarly journals The Influence of Irrigation during the Finishing and Polishing of Composite Resin Restorations—A Systematic Review of In Vitro Studies

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1675
Author(s):  
João Paulo Silva ◽  
Ana Coelho ◽  
Anabela Paula ◽  
Inês Amaro ◽  
José Saraiva ◽  
...  
Keyword(s):  
Systematic Review ◽  
Composite Resin ◽  
Dental Materials ◽  
In Vitro Studies ◽  
Cochrane Library ◽  
Polishing Procedures ◽  
Composite Resin Restorations ◽  
Resin Restorations

The surface smoothness of composite restorations affects not only their esthetic appearance but also other properties. Thus, rough surfaces can lead to staining, plaque accumulation, gingival irritation, recurrent caries, abrasiveness, wear kinetics, and tactile perception by the patient. The aim of this study was to evaluate the influence of irrigation during the finishing and polishing of composite resin restorations. A systematic search of the PubMed, Cochrane Library, EMBASE, Web of Science, and Clinical Trials databases was conducted. Papers published up to 11 February 2021 were considered. The quality of each study was assessed using the modified Consolidated Standards of Reporting Trials checklist for reporting in vitro studies on dental materials. No clinical studies were identified. Six in vitro studies were included, reporting changes in physical and esthetic properties. After performing a methodological quality assessment of the studies, some limitations were identified, the main limitation being the heterogeneous methodology across studies. The evidence resulting from this systematic review did not favor either wet or dry finishing/polishing procedures. There is a clear need for well-designed studies focusing on the comparison of dry/wet finishing/polishing with standard protocols to evaluate the differences among different materials and methods.

scholarly journals Effectiveness of an Exercise Program Designed for Persons with Osteoporosis and Osteopenia on Pain Management and Quality of Life

2014 ◽  
Vol 4 (3) ◽  
pp. 169-179
Author(s):  
María José Ponce Darós ◽  
Nuria Sempere Rubio ◽  
Sara Cortés Amador
Keyword(s):  
Quality Of Life ◽  
Life Support ◽  
Physical Therapist ◽  
Exercise Program ◽  
Control Group ◽  
Paired Samples ◽  
Perceived Satisfaction ◽  
Final Score ◽  
Experimental Group

Objective: To study if an exercise program designed for patients with osteoporosis and osteopenia can be decrease the pain and improve quality of life. Method: 84 patients between 50 and 83 years old was participated at the study, 42 persons in the experimental group and 42 persons in the control group. The study was made in Puçol CEAM (Valencia) for 9 months on the experimental group was performed exercises supervised by the physical therapist 2 days a week for 1 hour. In this period of time, pain, quality of life, support and service satisfaction was measured. Results: After performing paired samples t test, shows how the experimental group decreased their pain and improve their quality of life from the initial to the final score. By contrast, the control group worsened. After testing regression is statistically significant relationship between pain, quality of life and assistance exercises. The perceived satisfaction by patients in the experimental group was very good, and 100% of them would like to continue doing the exercise program. Conclusions: The implementation of a specific exercise program for patients with osteoporosis and osteopenia reduces pain and improves quality of life of participants.

scholarly journals Application of PDCA Cycle in Clinical Teaching of Respiratory Medicine During the Outbreak of COVID-19

2021 ◽  
Vol 5 (2) ◽  
Author(s):  
Meifang Ren ◽  
Cheng Huang
Keyword(s):  
Clinical Teaching ◽  
Teaching Method ◽  
Respiratory Medicine ◽  
Control Group ◽  
Traditional Teaching ◽  
Teaching Content ◽  
Pdca Cycle ◽  
Traditional Teaching Methods ◽  
Experimental Group

Objective: The study was to analyze the application of PDCA cycle in the clinical teaching of respiratory department during the outbreak of COVID-19. The teaching content focused on the prevention, control, diagnosis and treatment of COVID-19. Methods: Thirty clinical interns who entered the Department of Respiratory Medicine in our hospital from June 2020 to December 2020 were selected as the research objects and were randomly divided into two groups. The control group adopted traditional teaching methods and the experimental group adopted PDCA cycle. The teaching effect of the two group was compared. Results: The experimental group that used the PDCA cycle method had significantly higher theoretical knowledge, treatment skills, and comprehensive quality evaluation of COVID-19 than the traditional teaching method of the control group. Conclusion: The application of the PDCA cycle method in clinical teaching activities can improve the teaching process during the outbreak of COVID-19 and help improve the overall quality of clinical interns.

scholarly journals Assessment of the Quality of Composite Resin Restorations

2015 ◽  
Vol 05 (02) ◽  
pp. 19-25
Author(s):  
Z. A. Ijaimi ◽  
N. H. Abu-Bakr ◽  
Y. E. Ibrahim
Keyword(s):  
Composite Resin ◽  
Composite Resin Restorations ◽  
Resin Restorations

scholarly journals 1-Year clinical study of indirect resin composite restorations luted with a self-adhesive resin cement: effect of enamel etching

2012 ◽  
Vol 23 (2) ◽  
pp. 97-103 ◽  
Author(s):  
Cristiana Godoy Sartori Azevedo ◽  
Mario Fernando De Goes ◽  
Glaucia Maria Bovi Ambrosano ◽  
Daniel C.N. Chan
Keyword(s):  
Composite Resin ◽  
Resin Cement ◽  
Acid Etching ◽  
Adhesive Resin ◽  
Relyx Unicem ◽  
Indirect Composite ◽  
Adhesive Resin Cement ◽  
Composite Resin Restorations ◽  
Resin Restorations

In vitro studies have recommended enamel-etching before luting indirect restorations with self-adhesive resin cement. However, there is no scientific proof that this procedure has any clinical relevance. Thus, the aim of this study was to evaluate the effect of enamel-etching on the marginal quality of indirect composite resin restorations (inlay/onlay) using the self-adhesive cement RelyX Unicem clicker. Forty-two posterior teeth were selected from 25 patients that presented one or two teeth with large restorations in need of replacement. All teeth were prepared by the same operator and impressed with polyvinylsiloxane material. The composite resin restorations were built over plaster casts using the incremental technique with a LED device for light-curing the increments. The inlays/onlays were cemented according to one of the following protocols: 1. Etched group (ETR) - selective enamel phosphoric-acid etching + RelyX Unicem clicker; 2. Non-etched group (NER) - RelyX Unicem clicker alone. Each surface was light-cured for 60 s. Recalls occurred after 1 week (baseline), 6 and 12 months when the teeth were evaluated according to previously established scores (modified USPHS criteria). The clinical analysis showed little or no visible changes in the marginal quality after 1 year, even though a probe could detect all the restorations margins. Statistical analysis (Fisher’s exact test, p<0.05) detected no differences between the groups after 12 months. No restorations failed and no secondary caries were found. Enamel acid etching had no clinical relevance on the marginal quality of indirect composite resin restorations luted with RelyX Unicem clicker after 1 year of follow up.

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