Does immediate dentin sealing influence the polymerization of impression materials?

ABSTRACT Objectives: The objective of the following study is to evaluate the interaction between the resin materials used in immediate dentin sealing (IDS) techniques and impression materials with two different techniques to eliminate the oxygen-inhibition layer. Materials and Methods: The occlusal dentin surface of 35 human molars was exposed. The teeth were used in two Groups: Group 1 – Impression with Express XT; Group 2 – Impression with Impregum. Groups 1 and 2 were divided into 14 subgroups: Groups 1a and 2a – Control groups; 1b and 2b – IDS with Clearfil SE Bond (CSE); 1c and 2c – IDS with CSE + additional polymerization with glycerin jelly; 1d and 2d – IDS with CSE + alcohol; 1e and 2e – IDS with CSE and Protect Liner F (PLF); 1f and 2f – IDS with CSE and PLF + additional polymerization with glycerin jelly; and 1g and 2g – IDS with CSE and PLF + alcohol. Five teeth were used in each experimental group, and the tooth surface was photographed using a digital camera. Results: Small quantity of unpolymerized impression material remained attached to the CSE or to the PLF in Groups 1b and 1e. Groups 1c and 1d prevented the interaction. Small quantity of polymerized impression material remained attached to the CSE or to the PLF for Groups 2b and 2e. The same interaction was observed for Groups 2c and 2d. For Groups 2c and 2f, no interactions were observed. Conclusion: Resin materials interacted with impression materials. The application of glycerin jelly and alcohol prevented the interaction of CSE with Express XT and PLF with Impregum; however, these treatments were not completely effective in preventing the interaction of CSE with Impregum and PLF with Express XT.

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Effect of Petting a Dog on Immune System Function

Psychological Reports ◽

10.2466/pr0.95.3f.1087-1091 ◽

2004 ◽

Vol 95 (3_suppl) ◽

pp. 1087-1091 ◽

Cited By ~ 48

Author(s):

Carl J. Charnetski ◽

Sandra Riggers ◽

Francis X. Brennan

Keyword(s):

Immunoglobulin A ◽

Attitude Scale ◽

Control Groups ◽

Beneficial Effects ◽

Immune System Function ◽

Group 3 ◽

Group 2 ◽

Experimental Group ◽

Secretory Immunoglobulin ◽

Group 1

The present study assessed the effect of petting a dog on secretory immunoglobulin A (IgA) levels. 55 college students were randomly assigned to either an experimental group or one of two control groups. Group 1 ( n = 19) petted a live dog; Group 2 ( n = 17) petted a stuffed dog, while Group 3 ( n = 19) simply sat comfortably on a couch. Each participant was exposed to one of the three conditions for 18 min. Pre- and posttreatment saliva samples yielded a significant increase in IgA for Group 1 only. Participants were also asked to complete the Pet Attitude Scale of Templer, Salter, Dickey, Baldwin and Veleber. Scores on this scale correlated with IgA increases only for participants in Group 2 (petting a stuffed animal). Results are discussed in terms of the beneficial effects of pets on health in general, and immunity in particular.

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Learning through Play: Improving the Reading Skills through the Joyful Phonetics of Pre-School Children

The Open Psychology Journal ◽

10.2174/1874350101912010188 ◽

2019 ◽

Vol 12 (1) ◽

pp. 188-196

Author(s):

Taufik Taufik ◽

Suwarsi Suminto ◽

Rahimah Ibrahim ◽

Haslinda Abdullah

Keyword(s):

School Children ◽

Reading Skills ◽

Intervention Group ◽

Control Group ◽

Control Groups ◽

Group 2 ◽

Learning Through Play ◽

Experimental Group ◽

Group 1

Objective: This study examined the role of a joyful phonetic method to improve reading skills of pre-school children in Indonesia. Materials and Methods: Forty-seven pre-school children of age 4-5 years are involved in the study. Two criteria were used to select the participants of the study. Criteria included “they could not read” and “had never read”. The Solomon three groups design was used to test the effectiveness of the treatment. There were one intervention group and two control groups. One of the control groups received the treatment and another one did not. Treatment included joyful learning so that participants did not realise that they were actually learning. Results: According to data analysis, (1) joyful phonetic improved the reading skills of the experimental group more than the control group 1 and (2) the joyful phonetic improved the reading skills of the control group 2 more than the control group 1. Moreover, it was found that the phonetic, which had been given in the joyful condition, affects the improvement of the reading skills of pre-school children. Conclusion: The implication of the study is that the pre-school children would be more focused on the learning if the method has been conducted in a playing nature. Furthermore, pre-school children should be taught to read as they tend to begin their schooling.

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Avoidance of Interaction between Impression Materials and Tooth Surface Treated for Immediate Dentin Sealing: An In Vitro Study

Materials ◽

10.3390/ma12203454 ◽

2019 ◽

Vol 12 (20) ◽

pp. 3454 ◽

Cited By ~ 4

Author(s):

Bruna Sinjari ◽

Gianmaria D’Addazio ◽

Giovanna Murmura ◽

Giorgio Di Vincenzo ◽

Mario Semenza ◽

...

Keyword(s):

In Vitro Study ◽

Surface Cleaning ◽

Tooth Surface ◽

Human Teeth ◽

Impression Material ◽

Oxygen Inhibition ◽

Impression Materials ◽

Final Cleaning ◽

Cleaning Protocol

Immediate dentin sealing (IDS) is an advantageous approach for realizing adhesive restorations, but it interferes with the polymerization of impression material due to the oxygen-inhibition layer (OIL), which leaves residues of impression material on the teeth. The aim of this study is to identify a clinical surface cleaning protocol after IDS in order to achieve defect-free impressions. Sixty extracted human teeth were cut to expose fresh dentin and the IDS protocol was performed. Samples were divided into six groups where different surface cleaning protocols were made before taking impressions: G1S and G1P groups, IDS and silicone (S) or polyether (P) impressions; G2S and G2P, treatment with prophy paste and impressions; G3S and G3P, final cleaning phase with surfactant agent and impressions. Teeth were evaluated with a scanning electron microscope to identify the areas (expressed in mm2) where residual impression material was present. The results demonstrate a reduction of residues in the G2 groups and the total disappearance in G3 groups with statistically significant differences between them. Superficial cleaning protocols with the prophy paste and surfactant agent lead to the elimination of the interaction with impression materials and OIL. These results suggest a safe clinical protocol for obtaining defect-free impressions after IDS.

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Effect of Splinting in Accuracy of Two Implant Impression Techniques

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-12-00198 ◽

2014 ◽

Vol 40 (6) ◽

pp. 633-639 ◽

Cited By ~ 5

Author(s):

Erica Dorigatti de Avila ◽

Fernanda de Matos Moraes ◽

Sabrina Maria Castanharo ◽

Marcelo Antonialli Del'Acqua ◽

Francisco de Assis Mollo

Keyword(s):

Confidence Interval ◽

Analysis Of Variance ◽

Impression Material ◽

Titanium Screw ◽

Standard Preparation ◽

Implant Abutment ◽

Interface Gaps ◽

Group 2 ◽

Group 1

Because there is no consensus in the literature about the need for a splint between copings, the aim of this study was to evaluate, in vitro, the accuracy of 2 impression techniques for implant-supported prostheses. A master cast was fabricated with four parallel implant abutment analogs and a passive framework. Two groups with 5 casts each were formed: Group 1 (squared impression copings with no splint: S) and Group 2 (splinted squared impression copings, using metal drill burs and Pattern resin: SS). The impression material used was polyvinyl siloxane with open trays for standard preparation of the casts. For each cast, the framework was positioned, and a titanium screw was tightened with 10 N·cm torque in analog A, after which measurements of the abutment-framework interface gaps were performed at analogs C and D. This process was repeated for analog D. These measurements were analyzed using software. A one-way analysis of variance (ANOVA) with a confidence interval of 95% was used to analyze the data. Significant differences were detected between S and SS in relation to the master cast (P ≤ 0.05). The median values of the abutment-framework interface gaps were as follows: master cast: 39.64 μm; squared impression copings with no splint: 205.86 μm; splinted squared impression copings: 99.19 μm. Under the limitations of this study, the technique presented for Group 2 produces better results compared with the technique used for Group 1.

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High-dose enoxaparin in the treatment of abdominal angiostrongyliasis in Swiss mice

Journal of Helminthology ◽

10.1017/s0022149x17000852 ◽

2017 ◽

Vol 92 (6) ◽

pp. 662-667 ◽

Cited By ~ 2

Author(s):

A.S.S. Sandri ◽

R. Rodriguez ◽

M.M. Costa ◽

S.M. Porto ◽

D. Schwingel ◽

...

Keyword(s):

Survival Rates ◽

Mesenteric Arteries ◽

High Dose ◽

Control Groups ◽

Intestinal Infarction ◽

Intestinal Lesions ◽

Group 2 ◽

High Doses ◽

And Control ◽

Group 1

AbstractAbdominal angiostrongyliasis (AA) is caused by Angiostrongylus costaricensis, which inhabits mesenteric arteries. There is no drug treatment for AA, and since intestinal infarction due to thrombi is one of the main complications of the disease, the use of anticoagulants may be a treatment option. Thus, we aimed to assess the effect of high doses of enoxaparin on the prevention of ischaemic intestinal lesions and on the survival of mice infected with A. costaricensis. Twenty-four mice were infected with L3 of A. costaricensis and divided equally into two groups: Group 1, control treated with placebo, and Group 2, treated daily with enoxaparin (2.5 mg/kg) for 50 days. All mice were subjected to necropsy and histological analysis. The results from gross and microscopic assessments showed no variation in the prevalence of lesions between the groups. An analysis was also performed among survivors and non-survivors, showing that animals that died often presented lesions, such as granulation tissue in the serosa, and intestinal infarction and adhesion. The mortality rate did not vary between the enoxaparin-treated and control groups. Thus, we showed that high doses of enoxaparin have no protective effect against AA, as the survival rates and lesions of mice did not vary between the treated and control groups. Considering that the use of prophylactic doses was also shown to be ineffective in a previous study, we do not recommend the use of enoxaparin for AA treatment.

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Penerapan Model Pembelajaran Problem Based Learning untuk Mengukur Kemampuan Berpikir Kritis Mahasiswa Calon Guru pada Mata Kuliah Psikologi Pendidikan

Jurnal Konseling dan Pendidikan ◽

10.29210/114000 ◽

2017 ◽

Vol 5 (1) ◽

pp. 1

Author(s):

Uus Toharudin ◽

Iwan Setia Kurniawan

Keyword(s):

Critical Thinking ◽

Prospective Teachers ◽

Educational Psychology ◽

Thinking Skills ◽

Critical Thinking Skills ◽

Average Score ◽

Test Results ◽

Group 2 ◽

Experimental Group ◽

Group 1

This study aims to determine the critical thinking skills of prospective teachers of biology at Pasundan University in the course of educational psychology. Implementation of Problem Based Learning learning model aims to measure students' critical thinking skills. The method used in this study is a quasi-experimental design with Randomized Control Group Posttest, data obtained based on the analysis, the data is described to obtain information or a description of the results of this research. The population in this study were 104 students, the sample in this study were 39 students for the experimental group-1 and 39 students for the experimental group-2. Data collected test data obtained from the test results of students who are given a score based on the indicators. results of research show that the critical thinking skills of prospective teachers of biology in educational psychology courses including category sufficient for the experimental group-1 and category well for the experimental group-2. The average score of the experimental group-1 amounted to 2.73, and the average score of the experimental group-2 by 3.05. Indicators of critical thinking skills at the highest indicator 3 (I-3) with an average of 3.38 for the experimental group-1 and 3.41 for the experimental group-2. Indicators of critical thinking skills are the lowest in two indicators (I-2) that is equal to 2.23 for the experimental group-1 and 2.74 for the experimental group-2. The average percentage of absorption problems in the experimental group-1 amounted to 51.25%, while the experimental group-2 amounted to 57.21%. The results of significance test p-value (0.008). Based on the significance of the test results can be concluded that the experimental group-2 has the critical thinking skills is better than the experimental group-1.

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Attitude of the Canine in Secondary Bone-Grafted and Nongrafted Patients with Cleft Lip and Palate

The Cleft Palate-Craniofacial Journal ◽

10.1597/04-016.1 ◽

2005 ◽

Vol 42 (6) ◽

pp. 679-686 ◽

Cited By ~ 15

Author(s):

Enkhtuvshin Gereltzul ◽

Yoshiyuki Baba ◽

Kimie Ohyama

Keyword(s):

Cleft Lip ◽

Cleft Lip And Palate ◽

Panoramic Radiography ◽

Control Groups ◽

Significant Difference ◽

Before And After ◽

Group 2 ◽

Two Stages ◽

And Control ◽

Group 1

Objective To investigate the eruption pattern of the cleft-side canine regarding its pre-eruption position relative to the cleft in bone-grafted (BG) and nongrafted (NonBG) patients with cleft lip and palate. Methods Fifty-three patients with cleft lip and palate (21 BG, 32 NonBG) were examined by panoramic radiography and posteroanterior cephalography taken before and after canine eruption. Subjects were categorized into BG, NonBG, and control groups. Canines at the pre-eruption stage were categorized as close to (group 1) or distant from (group 2) the cleft area. The canine angle and its change between the two stages were evaluated. Results No significant differences were noted between the initial canine angle of the BG and NonBG groups. Although canines in the BG group erupted without a significant change in angle, the canine angle increased significantly (p < .0001) in the NonBG and control groups. In group 1, a greater change in canine angle was noted in the NonBG (p < .05) and control (p < .01) groups than in the BG group. In group 2, no significant difference was noted among the three groups. Conclusions In BG patients, a canine located near the cleft appears to erupt at the same angle as it had before grafting. However, in NonBG patients, it erupts more vertically, guided by cortical bone. For canines distant from the cleft area, there is no significant difference in the change in angulation between NonBG and BG patients.

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Inhibition of Corneal Neovascularization by Topical and Subconjunctival Tigecycline

Journal of Ophthalmology ◽

10.1155/2014/452685 ◽

2014 ◽

Vol 2014 ◽

pp. 1-6 ◽

Cited By ~ 8

Author(s):

Sertan Goktas ◽

Ender Erdogan ◽

Rabia Sakarya ◽

Yasar Sakarya ◽

Mustafa Yılmaz ◽

...

Keyword(s):

Topical Administration ◽

Corneal Neovascularization ◽

Control Group ◽

Therapeutic Effects ◽

Control Groups ◽

Group 4 ◽

Percentage Area ◽

Group 3 ◽

Group 2 ◽

Group 1

Objective. To investigate the effects of topical and subconjunctival tigecycline on the prevention of corneal neovascularization.Materials and Methods. Following chemical burn, thirty-two rats were treated daily with topical instillation of 1 mg/mL tigecycline (group 1) or subconjunctival instillation of 1 mg/mL tigecycline (group 3) for 7 days. Control rats received topical (group 2) or subconjunctival (group 4) 0.9% saline. Digital photographs of the cornea were taken on the eighth day after treatment and analyzed to determine the percentage area of the cornea covered by neovascularization. Corneal sections were analyzed histopathologically.Results. The median percentages of corneal neovascularization in groups 1 and 3 were 48% (95% confidence interval (CI), 44.2–55.8%) and 33.5% (95% CI, 26.6–39.2%), respectively. The median percentages of corneal neovascularization of groups 1 and 3 were significantly lower than that of the control group (P=0.03andP<0.001, resp.). Histologic examination of samples from groups 1 and 3 showed lower vascularity than that of control groups.Conclusion. Topical and subconjunctival administration of tigecycline seems to be showing promising therapeutic effects on the prevention of corneal neovascularization. Furthermore, subconjunctival administration of tigecycline is more potent than topical administration in the inhibition of corneal neovascularization.

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Susceptibility of Enamel to Initial Erosion in Relation to Tooth Type, Tooth Surface and Enamel Depth

Caries Research ◽

10.1159/000369104 ◽

2015 ◽

Vol 49 (2) ◽

pp. 109-115 ◽

Cited By ~ 18

Author(s):

Thiago S. Carvalho ◽

A. Lussi

Keyword(s):

Citric Acid ◽

Tooth Surface ◽

Initial Surface ◽

Surface Microhardness ◽

Control Groups ◽

Acid Ph ◽

Tooth Type ◽

And Control ◽

Lower Slope ◽

Experimental Group

This study aimed at assessing the susceptibility of different tooth types (molar/premolar), surfaces (buccal/lingual) and enamel depths (100, 200, 400 and 600 µm) to initial erosion measured by surface microhardness loss (ΔSMH) and calcium (Ca) release. Twenty molars and 20 premolars were divided into experimental and control groups, cut into lingual/buccal halves, and ground/polished, removing 100 µm of enamel. The initial surface microhardness (SMH₀) was measured on all halves. The experimental group was subjected to 3 consecutive erosive challenges (30 ml/tooth of 1% citric acid, pH 3.6, 25°C, 1 min). After each challenge, ΔSMH and Ca release were measured. The same teeth were consecutively ground to 200, 400 and 600 µm depths, and the experimental group underwent 3 erosive challenges at each depth. No difference was found in SMH₀ between experimental and control groups. Multivariate nonparametric ANOVA showed no significant differences between lingual and buccal surfaces in ΔSMH (p = 0.801) or Ca release (p = 0.370). ΔSMH was significantly greater in premolars than in molars (p < 0.05), but not different with respect to enamel depth. Ca release decreased significantly with increasing depth. Regression between Ca release and ΔSMH at 100 µm depth showed lower slope and r2 value, associated with greater Ca release values. At 200-600 µm depths, moderately large r2 values were observed (0.651-0.830). In conclusion, different teeth and enamel depths have different susceptibility to erosion, so when Ca release is used to measure erosion, the depth of the test facet in enamel should be standardized, whereas this is less important if ΔSMH is used.

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Cytomorphometric and Morphological Analysis in Women with Trichomonas vaginalis Infection: Micronucleus Frequency in Exfoliated Cervical Epithelial Cells

Acta Cytologica ◽

10.1159/000431148 ◽

2015 ◽

Vol 59 (3) ◽

pp. 258-264 ◽

Cited By ~ 6

Author(s):

Zehra Safi Oz ◽

Banu Doğan Gun ◽

Mustafa Ozkan Gun ◽

Sukru Oguz Ozdamar

Keyword(s):

Epithelial Cells ◽

Trichomonas Vaginalis ◽

Control Group ◽

Study Group ◽

Control Groups ◽

The Mean ◽

The Difference ◽

Group 2 ◽

And Control ◽

Group 1

Objectives: The aim of this study was to explore the cytomorphometric and morphological effects of Trichomonas vaginalis in exfoliated epithelial cells. Study Design: Ninety-six Pap-stained cervical smears were divided into a study group and two control groups as follows: T. vaginalis cases, a first control group with inflammation, and a second control group without inflammation. Micronucleated, binucleated, karyorrhectic, karyolytic, and karyopyknotic cells and cells with perinuclear halos per 1,000 epithelial cells were counted. Nuclear and cellular areas were evaluated in 70 clearly defined cells in each smear using image analysis. Results: The frequencies of morphological parameters in the T. vaginalis cases were higher than the values of the two control groups, and the difference among groups was found to be significant (p < 0.05). The nuclear and cytoplasmic areas of epithelial cells were diminished in patients with trichomoniasis. The mean nucleus/cytoplasm ratio in T. vaginalis patients was higher than the value in the control groups, and the difference between the study group and control group 1 was significant. However, there was no statistically significant increase between the study group and control group 2. Conclusions:T. vaginalis exhibited significant changes in the cellular size and nuclear structure of the cells. The rising frequency of micronuclei, nuclear abnormalities, and changing nucleus/cytoplasm ratio may reflect genotoxic damage in trichomoniasis.

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