scholarly journals Bovine Tooth Discoloration Induced by Endodontic Filling Materials for Primary Teeth

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Samantha Rodrigues Xavier ◽  
Katerine Jahnecke Pilownic ◽  
Andressa Heberle Gastmann ◽  
Mariana Silveira Echeverria ◽  
Ana Regina Romano ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Calcium Hydroxide ◽  
Repeated Measures ◽  
Primary Teeth ◽  
Color Variation ◽  
The Other ◽  
Control Group ◽  
Filling Materials ◽  
Tooth Discoloration ◽  
Materials Used

Objective.This study evaluated the discoloration potential of endodontic materials used in primary teeth.Material and Methods.Dentine-enamel blocks were prepared from 75 bovine teeth, assorted in five experimental groups (n=15). The tested materials included an MTA-based material; zinc oxide and eugenol cement (ZOE); Vitapex; and calcium hydroxide thickened with zinc oxide (Calen + ZO). The color measurements were performed using a spectrophotometer at the following intervals: prior to (T0) and after placement of the filling (T1) and after 1 week (T2), 1 month (T3), 3 months (T4), 6 months (T5), and 9 months (T6). Data were submitted to ANOVA with repeated measures and Tukey’s test.Results.The time had a significant effect on the color variation (ΔE00⁎) (p<0.0001). The effect of the materials on the color variation (ΔE00⁎) was statistically significant (p=0.004). Interactions between time and materials demonstrated a significant effect on the values (ΔE00⁎) (p<0.0001). The ZOE cement showed the highest darkening effect (p=0.018).Conclusion.The MTA-based material showed the smallest discoloration during the experimental time; however, it was similar to the other materials and to the control group. Zinc oxide and eugenol showed higher discoloration.

Evaluation of Antimicrobial Efficacy of Various Root Canal Filling Materials Used in Primary Teeth: A Microbiological Study

2007 ◽  
Vol 31 (3) ◽  
pp. 193-198 ◽  
Author(s):  
S Reddy ◽  
Y Ramakrishna
Keyword(s):  
Zinc Oxide ◽  
Calcium Hydroxide ◽  
Root Canal ◽  
Primary Teeth ◽  
Endodontic Treatment ◽  
Root Canal Filling ◽  
Primary Molar ◽  
Filling Materials ◽  
Root Canal Filling Materials ◽  
Antimicrobial Effectiveness

The primary goal of endodontic treatment in primary teeth is to eliminate infection, and to retain the tooth in a functional state until their normal exfoliation time without endangering the permanent dentition or the general health of the child. The complexity of the pulp canal system in primary teeth presents a discerning problem for chemo-mechanical preparation. One of the factors determining the success of endodontic treatment in infected primary teeth is the sealing material that should encompass among other factors a potent bactericidal effect and the capacity to resorb along with the roots of primary teeth. This study evaluated the antimicrobial effectiveness of 5 root canal filling materials and a negative control agent against 23 strains of bacteria isolated from infected root canals of primary molar teeth and 3 non standard bacterial strains using agar diffusion assay. The materials were Zinc oxide and Eugenol (ZOE), Zinc oxide-Eugenol and Formocresol (ZOE+FC), Calcium hydroxide and sterile water (CAOH+H2O), Zinc oxide and Camphorated phenol (ZO+CP), Calcium hydroxide and Iodoform (Metapex) and Vaseline (Control). All the materials except Vaseline showed varied antimicrobial activity against the test bacteria. The zones of inhibition were ranked into 4 inhibition categories based on the proportional distribution of the data. All the 26 bacterial isolates were classified under 4 groups based on Aerobic/Anaerobic and Gram positive/Gram negative. Statistical analysis was carried out to compare the antimicrobial effectiveness between materials tested with each of the bacterial groupings. ZOE+FC produced strong inhibition against most bacteria when compared to ZOE, ZO+CP and CAOH+H2O. Metapex and Vaseline were found to be non inhibitory

scholarly journals Efficacy of digital radiographic systems in the quality assessment of intracanal materials used for primary teeth

2019 ◽  
Vol 18 ◽  
pp. e191649
Author(s):  
Guilherme Fantini Ferreira ◽  
Larissa Pereira Lagos de Melo ◽  
Mariana Rocha Nadaes ◽  
Fernanda Maria Mazoni Reis ◽  
Fernanda Miori Pascon ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Root Canal ◽  
Primary Teeth ◽  
Digital Systems ◽  
The Other ◽  
Micro Ct ◽  
Reference Standard ◽  
Root Canal Filling ◽  
Materials Used

Aim: To evaluate the performance of three digital radiographic systems in the analysis of root canal filling quality using different intracanal materials for primary teeth. Methods: Twenty-five bovine teeth were divided into 5 groups: Calen® combined with iodoform; Calen® combined with zinc oxide; zinc oxide and eugenol; UltraCal®XS, and 2% chlorhexidine combined with Ca(OH)2 + zinc oxide. Periapical radiographs were obtained with the VistaScan, Express, and SnapShot systems. The quality of the images was evaluated objectively (radiopacity) and subjectively (apical sealing and filling homogeneity). As the reference standard, the teeth were scanned with a micro-CT device. Results: Radiopacity differed among the radiographic systems and materials tested. In general, the greatest difference was observed between the Express and VistaScan systems; Calen® combined with iodoform resulted in the highest radiopacity. The radiographic systems did not differ in terms of homogeneity. However, Calen® combined with iodoform differed from the other materials and exhibited the best results. Regarding apical sealing, the SnapShot system and Calen® combined with zinc oxide provided the best results. Conclusion: Direct digital systems show better performance in evaluating the quality of endodontic treatment in primary teeth and should be preferred for this purpose.

scholarly journals The antimicrobial effects of zinc oxide-calcium hydroxide mixture fillers: determining the ideal mixture ratio

2019 ◽  
Author(s):  
Ali Nozari ◽  
Ali Karimkhani ◽  
Mohammad Motamedifar ◽  
Payam Arasteh
Keyword(s):  
Zinc Oxide ◽  
Calcium Hydroxide ◽  
Enterococcus Faecalis ◽  
Primary Teeth ◽  
Antibacterial Properties ◽  
In Vitro Study ◽  
Control Group ◽  
Distilled Water ◽  
Mixture Ratio

Background and Objectives: Although zinc oxide (ZO)-calcium hydroxide (CaOH) mixtures have been successful regard- ing their absorption rate compatibility with dissolving primary teeth, no study has been conducted on the appropriate mixture ratio to obtain effective antibacterial properties. In this study, we compared antibacterial activity of CaOH-ZO pastes using different mixture ratios sagainst Enterococcus faecalis as an important bacterium in root canal treatment failure. Materials and Methods: Seven types of pastes were prepared in our laboratory. The first group included one gram of ZO+eu- genol, second group included one gram of CaOH+distilled water, third group included 0.5gram ZO+0.5gram CaOH+distilled water (1:1), forth group included 0.75gramCaOH+0.25gramZO+distilled water (3:1), the fifth group included 0.33gram of CaOH+0.66gram of ZO+distilled water (1:2), the sixth group included 0.75gram of ZO+0.25 CaOH+distilled water (3:1), the seventh group included 0.66 gram CaOH+0.33 gram ZO+distilled water (2:1), and the final group included one gram of gelatin+distilled water (as the control group). These pastes were compared regarding their antibacterial effects against Enterococcus faecalis using agar diffusion and microdilution methods. Results: Except for the control group, all prepared pastes showed antibacterial properties. Order of minimum inhibitory concentration for pastes were as followed: CaOH-ZO (1:3)=CaOH-ZO (1:2)>CaOH-ZO (1:1)>CaOH-ZO (3:1)=CaOH-ZO (2:1)>CaOH=ZO-eugenol. Order of minimum bactericidal concentration, which shows a weaker bactericidal effect, accord- ing to type of paste, were as followed: CaOH-ZO (1:3)>CaOH-ZO mixture (1:2)>CaOH-ZO mixture (1:1)>CaOH-ZO mix- ture (3:1)=CaOH-ZO (2:1)>CaOH=ZO-eugenol. Only CaOH-ZO (1:3) and CaOH-ZO (1:2), showed significantly weaker MICs and MBCs (p < 0.001). Conclusion: Considering the limitations of an in-vitro study, in terms of anti-bacterial effects against Enterococcus faecalis, CaOH-ZO mixture (2:1) is equivalent to ZO-eugenol as the most commonly used material in polypectomy of primary teeth.  

scholarly journals Physicochemical and Biological Evaluation of Endodontic Filling Materials for Primary Teeth

2017 ◽  
Vol 28 (5) ◽  
pp. 578-586 ◽  
Author(s):  
Katerine Jahnecke Pilownic ◽  
Ana Paula Neutzling Gomes ◽  
Zhe Jun Wang ◽  
Luiza Helena Silva Almeida ◽  
Ana Regina Romano ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Cell Viability ◽  
Primary Teeth ◽  
Antimicrobial Effect ◽  
Biological Evaluation ◽  
In Vivo Studies ◽  
Filling Materials ◽  
Histological Data ◽  
Biocompatibility Test

Abstract This study assessed the pH, radiopacity, antimicrobial effect, cytotoxicity and biocompatibility of endodontic filling materials for primary teeth. Zinc oxide eugenol (ZOE), Vitapex and Calen paste thickened with zinc oxide (ZO) were evaluated in comparison to an experimental MTA-based material. Radiopacity was tested using a graduated aluminum stepwedge with a digital sensor (n=5). The materials pH was recorded at 1, 4, 12 h; 1, 3, 7, 15 and 30 days (n=5). Direct contact test was used to assess the antimicrobial efficacy against Enterococcus faecalis after 1, 4, 12, 24 h (n=5). Cytotoxicity assay used MTT test for cell viability after incubation for 1, 3 and 7 days (n=5). For biocompatibility test, Wistar rats had received implants containing each material (n=5). The biopsied tissues were histologically analyzed after 15, 30 and 60 days. The results of radiopacity, pH, antimicrobial capacity and cytotoxicity were analyzed using ANOVA and Tukey tests. The histological data were submitted to Kruskal-Wallis test. The experimental material presented the lowest radiopacity (3.28 mm Al) and had a pH>12.0 throughout the test period. The experimental material showed the highest antibacterial effect, killing over 99.97% bacteria in 4 h. Vitapex presented the highest cell viability. Initially, biocompatibility test showed moderate to severe inflammation in all groups. After 60 days, Calen+ZO group showed moderate inflammation, while the others showed predominantly mild inflammatory reaction. The present results demonstrated that the experimental MTA-based material exhibited satisfactory behavior regarding the studied properties. Additional in vivo studies are necessary for a better evaluation of the material.

scholarly journals Effect of Educational Games on Self-concept Levels of Inclusive Students Studying in Secondary Schools

2018 ◽  
Vol 6 (10) ◽  
pp. 183
Author(s):  
Serhat Üstündağ ◽  
Gülsen Özcan
Keyword(s):  
Secondary Schools ◽  
Peer Relationships ◽  
Repeated Measures ◽  
Educational Games ◽  
The Other ◽  
Self Concept ◽  
Control Group ◽  
Spring Semester ◽  
Significant Difference ◽  
Experimental Group

This research examines the effect of educational games on self-concept levels of inclusive students enrolled in secondary schools. The research was conducted in two secondary schools in Golbasi district of Ankara, the capital of Turkey, in the spring semester of 2015 - 2016 academic year. The research employed semi-experimental design with pretest and posttest control group. Of a total of 24 students, 12 (4 girls, 8 boys) were included in the experimental group and the other 12 (6 girls, 6 boys) were included in the control group. Educational games program, an independent variable of the research, was applied for 11 weeks, 2 lessons per week. The program that did not include educational games was applied to the control group. Self-concept Scale (SCS) was used to collect data in the research. Independent group t test was used for data analysis, and for single-factor repeated measures, two-factor ANOVA test was used. The significance level was determined to be 0.05. At the end of this research, a significant difference was found in favor of the students in the experimental group in terms of physical competence, physical appearance, peer relationships and general self-concept dimensions of the self-concept scale. On the other hand, there was not any significant difference in favor of both groups in terms of the dimension of relations with parents of the scale.

scholarly journals Neural Processing of Other-Race Faces as a Function of Racial Familiarity: A P300 Study

2018 ◽  
Vol 7 (3.22) ◽  
pp. 21
Author(s):  
Tai Yan Shan ◽  
Faruque Reza ◽  
Tahamina Begum ◽  
Nasir Yusoff
Keyword(s):  
Repeated Measures ◽  
Event Related Potential ◽  
The Other ◽  
P300 Amplitude ◽  
Control Group ◽  
Neural Processing ◽  
Oddball Task ◽  
The Social ◽  
Independent Variable ◽  
Cognition Model

Background: The other-race categorisation advantage (ORCA) is a well-established phenomenon, whereby other-race faces are categorised faster than own race faces. Objectives: This study investigated whether extraverts would demonstrate an ORCA-like effect toward unfamiliar other-race faces and familiar other-race faces in a modified oddball and choice reaction paradigm.  Methods: This event-related potential (ERP) study employed a repeated measures experimental design with one independent variable (racial familiarity) and three levels (familiar other-race/Malay faces, unfamiliar other-race/African faces, control group/furniture photos). In the oddball task, African faces and Malay faces were the target stimuli and furniture photos were the standard stimuli. Electroencephalography data (EEG) was collected during the oddball task, from which ERP components were derived. Results: The reaction time (RT) for African and Malay faces were not significantly different.  Significant effect of racial familiarity on P300 latencies at all electrode sites was not observed.  However, there was a significant effect of racial familiarity on P300 amplitudes at midline electrodes (Cz).  It was also observed that the P300 amplitude was larger for African faces than Malay faces at midline electrodes (Cz). Conclusion: An ORCA-like effect was not found in categorisation tasks involving faces from a familiar and an unfamiliar other-race, but a larger P300 amplitude was evoked by African faces. This dissociation between RT and P300 amplitude provided important theoretical implications with regard to models associated with ORCA. Specifically, the current findings lent support to the social cognition model and the Categorisation-Individuation Model (CIM).

Effects of eugenol and non-eugenol endodontic fillers on short post retention, in primary anterior teeth: an in vitro study

2005 ◽  
Vol 29 (3) ◽  
pp. 211-214 ◽  
Author(s):  
Fabiana Teixeira Alves ◽  
Ricardo de Sousa Vieira
Keyword(s):  
Tensile Strength ◽  
Statistical Analysis ◽  
Bond Strength ◽  
Calcium Hydroxide ◽  
Primary Teeth ◽  
In Vitro Study ◽  
Filling Material ◽  
Filling Materials ◽  
Anterior Teeth

The aim of this study was to measure in vitro the tensile bond strength of short composite posts in anterior primary teeth filled with calcium hydroxide and eugenol-based endodontic filling materials. Means of tensile strength ranged from 2.66 to 3.56MPa. Statistical analysis (ANOVA) revealed that there were no statistically significant differences between the groups. It was concluded that the type of filling material used in the endodontic treatment did not interfere with the tensile strength.

scholarly journals Antibacterial activity of root canal filling materials for primary teeth: zinc oxide and eugenol cement, Calen paste thickened with zinc oxide, Sealapex and EndoREZ

2009 ◽  
Vol 20 (4) ◽  
pp. 290-296 ◽  
Author(s):  
Alexandra Mussolino de Queiroz ◽  
Paulo Nelson Filho ◽  
Léa Assed Bezerra da Silva ◽  
Sada Assed ◽  
Raquel Assed Bezerra da Silva ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Root Canal ◽  
Primary Teeth ◽  
Bacterial Strains ◽  
Root Canal Filling ◽  
Filling Materials ◽  
Root Canal Filling Materials ◽  
Bacterial Growth Inhibition

This study evaluated in vitro the antibacterial activity of 4 root canal filling materials for primary teeth - zinc oxide and eugenol cement (ZOE), Calen paste thickened with zinc oxide (Calen/ZO), Sealapex sealer and EndoREZ sealer - against 5 bacterial strains commonly found in endodontic infections (Kocuria rhizophila, Enterococcus faecalis, Streptococcus mutans, Escherichia coli and Staphylococcus aureus) using the agar diffusion test (agar-well technique). Calen paste, 1% chlorhexidine digluconate (CHX) and distilled water served as controls. Seven wells per dish were made at equidistant points and immediately filled with the test and control materials. After incubation of the plates at 37oC for 24 h, the diameter of the zones of bacterial growth inhibition produced around the wells was measured (in mm) with a digital caliper under reflected light. Data were analyzed statistically by analysis of variance and Tukey's post-hoc test (?=0.05). There were statistically significant differences (p<0.0001) among the zones of bacterial growth inhibition produced by the different materials against all target microorganisms. K. rhizophila was inhibited more effectively (p<0.05) by ZOE, while Calen/ZO had its highest antibacterial activity against E. faecalis (p<0.05). S. mutans was inhibited by Calen/ZO, Sealapex and ZOE in the same intensity (p>0.05). E. coli was inhibited more effectively (p<0.05) by ZOE, followed by Calen/ZO and Sealapex. Calen/ZO and ZOE were equally effective (p>0.05) against S. aureus, while Sealapex had the lowest antibacterial efficacy (p<0.05) against this microorganism. EndoREZ presented antibacterial activity only against K. rhizophila and S. aureus. The Calen paste and Calen/ZO produced larger zones of inhibition than 1% CHX when the marker microorganism was E faecalis. In conclusion, the in vitro antibacterial activity of the 4 root canal filling materials for primary teeth against bacterial strains commonly found in endodontic infections can be presented in a decreasing order of efficacy as follows: ZOE>Calen/ZO>Sealapex>EndoREZ.

In vivo outcomes of Indirect Pulp Treatment using a Self-etching Primer versus Calcium Hydroxide over the Demineralized Dentin in Primary Molars

2008 ◽  
Vol 33 (2) ◽  
pp. 131-136 ◽  
Author(s):  
Luciano Casagrande ◽  
Letícia Westphalen Bento ◽  
Simone Ossok Rerin ◽  
Èvelin de Resende Lucas ◽  
Débora Martini Dalpian ◽  
...  
Keyword(s):  
Calcium Hydroxide ◽  
Primary Teeth ◽  
Signs And Symptoms ◽  
Adhesive System ◽  
Control Group ◽  
Primary Molar ◽  
Indirect Pulp Treatment ◽  
Pulp Treatment ◽  
Demineralized Dentin

Objective: To evaluate the clinical and radiographic outcomes (24 months) of indirect pulp treatment (IPT)in primary teeth when a self-etching primer or a calcium hydroxide layer was used over the remaining carious dentin. Study design: Primary molar teeth with deep carious lesions without signs and symptoms of irreversible pulpitis were divided into two groups, according to the capping material: Experimental group(1): self-etching adhesive system (Clearfill SE Bond); and Control group (2): calcium hydroxide liner(Dycal). Both groups were followed up after application of a resin restoration (3M - Z250). Results: After 2 years of clinical and radiographic follow-up, no statistical difference was found between groups (p=1). The overall success rate reached 87%. Conclusion: These results demonstrate that IPT has a high clinical and radiographic performance in primary teeth and is not dependent on the capping material used over the demineralized dentin.

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