scholarly journals Evaluation of Stain Penetration by Beverages in Demineralized Enamel Treated With Resin Infiltration

2016 ◽  
Vol 41 (1) ◽  
pp. 93-102 ◽  
Author(s):  
J Lee ◽  
J-W Chen ◽  
S Omar ◽  
SR Kwon ◽  
M Meharry
Keyword(s):  
Methylene Blue ◽  
Grape Juice ◽  
Distilled Water ◽  
Chi Square ◽  
Human Teeth ◽  
Test Analysis ◽  
Resin Infiltration ◽  
Demineralized Enamel ◽  
Significant Difference ◽  
Control Surfaces

SUMMARY Purpose To evaluate stain penetration by different beverages in artificially demineralized human teeth treated with resin infiltration. Methods and Materials Sixty extracted human permanent molars were demineralized, treated with resin infiltration (Icon), and immersed in four different beverages (coffee, grape juice, iced tea, and distilled water; N=15) for four weeks. After aging, teeth in the distilled water group were stained with 2% methylene blue for 24 hours. All teeth were sectioned, and stain penetration was evaluated under light microscopy. Chi-square test, independent and paired sample t-test, analysis of variance with the Fisher least significant difference post hoc test, and the Kruskal-Wallis test were used to analyze the results (p<0.05). Results Resin infiltration–treated surfaces (Icon surfaces) had statistically significant fewer samples with presence of stain penetration compared to untreated surfaces (control surfaces) (p<0.001). There was also a significant decrease in depth of stain penetration in Icon surfaces compared to the control surfaces (p<0.001). Among tested beverage groups, iced tea showed significantly greater depth of stain penetration (0.134±0.029 mm), followed by grape juice (0.118±0.047 mm), methylene blue (0.022±0.019 mm), and coffee (0.008±0.017 mm; p<0.001). Conclusion Both Icon and control surfaces exhibit stain penetration by different beverages (iced tea, grape juice, and coffee). However, resin-infiltrated enamel surfaces allow significantly less depth of stain penetration compared to untreated surfaces. The iced tea group presents greatest depth of stain penetration, followed by grape juice, methylene blue, and coffee.

scholarly journals Pop-Q Components Comparison among Multiparous and Nulliparous Women

2016 ◽  
Author(s):  
Lucy Lisa
Keyword(s):  
Physical Work ◽  
Hormonal Contraceptives ◽  
Chi Square ◽  
Cross Sectional ◽  
Test Analysis ◽  
Nulliparous Women ◽  
Significant Difference ◽  
Multiparous Women ◽  
Heavy Physical Work ◽  
Chi Square Test

Objective: To compare the measurement of POP-Q components between multiparous and nulliparous women. Method: This study is a cross-sectional research conducted in several hospitals in Makassar during the period of June to October 2012, with 270 women as the subjects. Subjects were divided into three groups: nulliparous, parity 1-2, and parity 3 (multiparous). We analyzed the mean POP-Q components results between 3 groups using t-test, analysis of prolapse based on POP-Q components measurement, and analysis of correlation between risk factors with prolapse was done using Chi-square test. Result: There is a significant difference in POP-Q components measurement between multiparous and nulliparous women, consecutively for: Aa point -2.14 and -2.97 cm, Ba point -2.11 and -2.99 cm, C point -5.69 and -6.86 cm, gh 3.33 and 2.70 cm, pb 2.60 and 3.27 cm, TVL 8.65 and 9.06 cm, Ap point -2.35 and -2.93 cm, Bp point - 2.61 and -2.96 cm, D point -6.61 and -7.42 cm. In multiparous women, points Aa, Ba, C, D, Ap and Bp became more prolapsed, gh became longer, while pb and TVL became shorter. Conclusion: The proportion of prolapse is higher in multiparous women with significant associations with age, body mass index, education level, and history of heavy physical work, delivering a large baby and use of hormonal contraceptives. [Indones J Obstet Gynecol 2014; 4: 204-210] Keywords: multiparous women, nulliparous women, parity, POP-Q

scholarly journals Comparative Evaluation of Push-out Bond Strength of ProRoot MTA, Bioaggregate and Biodentine

2014 ◽  
Vol 15 (3) ◽  
pp. 336-340 ◽  
Author(s):  
Sara A Alsubait ◽  
Qamar Hashem ◽  
Njood AlHargan ◽  
Khawlah AlMohimeed ◽  
Ahmed Alkahtani
Keyword(s):  
Bond Strength ◽  
Comparative Evaluation ◽  
Test Material ◽  
Cohesive Failure ◽  
Chi Square ◽  
Human Teeth ◽  
Significant Difference ◽  
The Mean ◽  
Type Of Failure ◽  
Push Out

ABSTRACT Objective To evaluate the push-out bond strength of Biodentine (BD) in comparison with two available calcium silicate based materials, bioaggregate (BA) and ProRoot MTA (WMTA). Materials and methods One hundred and twenty-three root dentin slices of freshly extracted single rooted human teeth were randomly divided into three groups (n = 41) according to the used test material: WMTA, BA, BD. After canal space preparation, the filling materials were placed inside the lumen of the slices. After 72 hours, the maximum force applied to materials at the time of dislodgement was recorded and slices were then examined under a stereomicroscope at ×40 magnification to determine the nature of bond failure. Analysis of variance (ANOVA) test was used to compare means of push-out bond strength. Post-hoc test was then accomplished for multiple comparisons. Chi-square test was used to determine if there is significant association between the type of material and type of failure. Results The mean push-out bond strength ± standard deviation in MPa values of WMTA, BA and BD were 23.26 ± 5.49, 9.57 ± 3.45, 21.86 ± 6.9, respectively. There was no significant difference between the means of WMTA and BD (p = 0.566), but the mean of BA was significantly lower than those of WMTA and BD (p = 0.000). Under stereomicroscope, WMTA and BA showed a majority of mixed type of failure than cohesive failure, while BD showed the opposite. No adhesive failure was observed in any specimen. Conclusion The findings of the present study imply that the force needed for BD displacement is similar to WMTA and significantly higher than the force required to displace BA. How to cite this article Alsubait SA, Hashem Q, AlHargan N, AlMohimeed K, Alkahtani A. Comparative Evaluation of Push-out Bond Strength of ProRoot MTA, Bioaggregate and Biodentine. J Contemp Dent Pract 2014;15(3):336-340.

scholarly journals The relationship between the storage methods and the formation of dentinal defects (cracks)

2019 ◽  
Vol 67 ◽  
Author(s):  
Fábio Nakao ARASHIRO ◽  
Michelle Tavares Galotto NANTES ◽  
Pedro Gregol da SILVA ◽  
Key Fabiano Souza PEREIRA ◽  
Muryllo Eduardo Sales dos SANTOS
Keyword(s):  
Storage Period ◽  
Root Apex ◽  
Surgical Instruments ◽  
Distilled Water ◽  
Chi Square ◽  
Significance Level ◽  
Significant Difference ◽  
And Storage ◽  
Group 1

ABSTRACT Objective: This research study aims at conducting an in vitro evaluation of crack formation in freshly extracted teeth after undergoing different storage and decontamination methods. Methods: 60 erupted upper third molars conventionally extracted using forceps # 210h (quinelato surgical instruments, rio claro - sp) and randomly distributed in three groups (n = 30): group 1 - storage in dry environment for 30 days, group 2 - sterilization in autoclave and storage for 30 days in distilled water, and group 3 - 10% formaldehyde decontamination for 14 days and storage in distilled water for additional 30 days. after the storage period, teeth had their roots transversely sectioned at 2, 4 and 6 mm below the root apex using a low rotation diamond disk under constant cooling. the evaluation of fragments was performed using a 30-time magnification microscope. Results: Cracks were seen only in group 1 and the chi-square statistical test with 5% significance level showed a statistically significant difference comparing the dry storage group to the others. Conclusion: The storage of extracted teeth in a dry environment influences the formation of dentinal defects.

scholarly journals Effect of different EGTA concentrations on dentin microhardness

2002 ◽  
Vol 13 (3) ◽  
pp. 188-190 ◽  
Author(s):  
Antonio Miranda da Cruz-Filho ◽  
Eduardo Augusto de Paula ◽  
Jesus Djalma Pécora ◽  
Manoel Damião de Sousa-Neto
Keyword(s):  
Acetic Acid ◽  
Statistical Analysis ◽  
High Speed ◽  
Acrylic Resin ◽  
Distilled Water ◽  
Three Solutions ◽  
Human Teeth ◽  
Tukey Test ◽  
Significant Difference ◽  
Root Dentin

The effect of 1%, 3% and 5% EGTA (ethylene glycol-bis-(b-amino-ethyl ether) N,N,N´,N´-tetra-acetic acid) on the microhardness of root dentin of the cervical third of human teeth was studied. Five newly extracted maxillary incisors were sectioned transversely at the cementoenamel junction, and the crowns were discarded. The roots were embedded in blocks of high-speed polymerized acrylic resin and cut transversely into 1-mm sections. The second section of the cervical third of the root of each tooth was sectioned and divided into four parts. Each part was placed on an acrylic disc that was used as a base for microhardness measurement. Fifty microliters of 1% EGTA, 3% EGTA, or 5% EGTA were applied to the dentin surface. Deionized and distilled water was used as control. Dentin microhardness was then measured with a load of 50 g for 15 s. Statistical analysis showed that the three concentrations of the chelating solution EGTA significantly reduced dentin microhardness when compared with water (ANOVA, p<0.01), and that there was a statistically significant difference among the three solutions (Tukey test, p<0.05).

scholarly journals IN VITRO STUDY ON MARGINAL MICROLEAKAGE OF FOUR TEMPORARY CEMENTS IN PROVISIONAL CROWNS

2019 ◽  
Vol 3 (8) ◽  
Author(s):  
Dr. Ravi Nag ◽  
Dr. Jagjeet Singh ◽  
Dr. Abhilasha Masih Gottlieb ◽  
Dr. Ponnanna A. A. ◽  
Dr. Nikhil Verma ◽  
...  
Keyword(s):  
Zinc Phosphate ◽  
In Vitro Study ◽  
Acrylic Resin ◽  
Vitro Study ◽  
P Value ◽  
Chi Square ◽  
Human Teeth ◽  
Luting Cement ◽  
Significant Difference

Background: Prolonged retention of provisional restoration is depends upon the long term affinity between restoration and teeth structures which depend upon the use of good mechanical characteristics, low solubility, and superior adhesion  quality of luting cement which also resist bacterial and molecular penetration. Hence, assessment of marginal leakage of provisional restorative materials sealed with provisional cements using the standardized procedures is essential. Aim: This study aimed at in vitro study of microleakage of 4 provisional cements, a cavity base compound and a zinc-phosphate luting cement in provisional acrylic resin crowns fixed on extracted human teeth. Material & Methods:  The teeth with acrylic restorations were randomly divided into 6 groups of 6 specimens each. Each group received different types of temporary cement. Acrylic resin crowns were made and fitted on intact human premolars with the 4 cements. All restorations were applied in a standardized manner. Specimen were submerged in a 2% methylene blue solution, then sectioned and observed under a stereomicroscope for the detection of marginal microleakage. Obtained data were subjected to ANNOVA and Chi –square test to know statistical significant difference between different groups.  P value less than 0.05 was considered significant. Results and observation: Mean frequency of microleakage was statistically significant among all the groups under study with Pvalue<0.017. Conclusion: Among all the temporary cement, Zinc-phosphate cements has the best property with reduced microleakage. Even it is used as cavity base but can be used as good temporary cement as far as microleakage is concerned. Key words, Microleakage, provisional cement, restorations, crowns, in vitro

scholarly journals Antibacterial Efficacy of Calcium Hypochlorite with Vibringe Sonic Irrigation System onEnterococcus faecalis: An In Vitro Study

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Aysin Dumani ◽  
Hatice Korkmaz Guvenmez ◽  
Sehnaz Yilmaz ◽  
Oguz Yoldas ◽  
Zeliha Gonca Bek Kurklu
Keyword(s):  
Enterococcus Faecalis ◽  
Irrigation System ◽  
Antimicrobial Property ◽  
Distilled Water ◽  
Calcium Hypochlorite ◽  
Human Teeth ◽  
Root Canals ◽  
Significant Difference ◽  
Sonic Activation

Aim. The purpose of this study was to compare the in vitro efficacy of calcium hypochlorite (Ca[OCl]2) and sodium hypochlorite (NaOCl) associated with sonic (Vibringe) irrigation system in root canals which were contaminated withEnterococcus faecalis.Material and Methods. The root canals of 84 single-rooted premolars were enlarged up to a file 40, autoclaved, inoculated withEnterococcus faecalis, and incubated for 21 days. The samples were divided into 7 groups according to the irrigation protocol: G0: no treatment; G1: distilled water; G2: 2.5% NaOCl; G3: 2.5% Ca(OCl)2; G4: distilled water with sonic activation; G5: 2.5% NaOCl with sonic activation; and G6: 2.5% Ca(OCl)2with sonic activation. Before and after decontamination procedures microbiological samples were collected and the colony-forming units were counted and the percentages of reduction were calculated.Results. Distilled water with syringe irrigation and sonic activation groups demonstrated poor antibacterial effect onEnterococcus faecaliscompared to other experimental groups (p<0.05). There was no statistically significant difference between syringe and sonic irrigation systems with Ca(OCl)2and NaOCl.Conclusion. The antimicrobial property of Ca(OCl)2has been investigated and compared with that of NaOCl. Both conventional syringe irrigation and sonic irrigation were found effective at removingE. faecalisfrom the root canal of extracted human teeth.

scholarly journals Comparative in vitro study of intracanal Enterococcus faecalis reduction using photosensitizers in aPDT

2021 ◽  
Vol 20 ◽  
pp. e214034
Author(s):  
Maria Cleide Azevedo Braz ◽  
André Hayato Saguchi ◽  
Eduardo Akisue ◽  
Adriana de Oliveira Lira ◽  
Sidnea Aparecida Freitas Paiva ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Confidence Interval ◽  
Enterococcus Faecalis ◽  
Toluidine Blue ◽  
Irradiation Time ◽  
In Vitro Study ◽  
Human Teeth ◽  
Significant Difference ◽  
Group Comparisons

Aim: To compare Enterococcus faecalis reduction after antimicrobial photodynamic therapy (aPDT) used with methylene blue, toluidine blue, tannin, and curcumin as photosensitizers, an adjunct to endodontic chemomechanical preparation (CMP) in root canals of human teeth. Methods: A total of 120 single-rooted teeth were divided into 6 groups (n  =  20): G1- CMP and 2.5% sodium hypochlorite (NaOCl); G2- CMP and saline solution; G3- CMP, 2.5% NaOCl, and aPDT with 0.005% methylene blue; G4- CMP, 2.5% NaOCl, and aPDT with 0.005% toluidine blue; G5- CMP, 2.5% NaOCl, and aPDT with 0.005% tannin; and G6- CMP, 2.5% NaOCl, and aPDT with 0.005% curcumin. A portable semiconductor laser was used (660  nm, 100  mW, 1.8  J, 180s) in groups 1, 2, 3, 4, 5, and a blue LED light-curing (420-480  nm, 1200 mV/cm2 ) in G6. For all groups, a 5 min pre-irradiation time was applied. Samples were collected before (initial collection), immediately after (intermediate collection) and 7 days after CMP (final collection) for colony-forming unit (CFU) counting. The Kruskal-Wallis test and analysis of variance (ANOVA) were performed (p < 0.05; 95% confidence interval). Results: In between-group comparisons, there was no significant difference observed in the number of CFUs at the initial (p >< 0.001) and final collections (p >< 0.001) for G2 and G3. In within-group comparisons, the number of CFUs showed a decreasing trend in G4 (p = 0.007) and G5 (p = 0.001). Conclusion: Photosensitizers promoted E. faecalis reduction, with better results for tannin and curcumin. Alternative photosensitizers should be the focus of further studies.>< 0.05; 95% confidence interval). Results: In between-group comparisons, there was no significant difference observed in the number of CFUs at the initial (p < 0.001) and final collections (p >< 0.001) for G2 and G3. In within-group comparisons, the number of CFUs showed a decreasing trend in G4 (p = 0.007) and G5 (p = 0.001). Conclusion: Photosensitizers promoted E. faecalis reduction, with better results for tannin and curcumin. Alternative photosensitizers should be the focus of further studies.><  0.001) and final collections (p < 0.001) for G2 and G3. In within-group comparisons, the number of CFUs showed a decreasing trend in G4 (p = 0.007) and G5 (p = 0.001). Conclusion: Photosensitizers promoted E. faecalis reduction, with better results for tannin and curcumin. Alternative photosensitizers should be the focus of further studies>< 0.001) for G2 and G3. In within-group comparisons, the number of CFUs showed a decreasing trend in G4 (p = 0.007) and G5 (p = 0.001). Conclusion: Photosensitizers promoted E. faecalis reduction, with better results for tannin and curcumin. Alternative photosensitizers should be the focus of further studies.

scholarly journals Influence of calcium hydroxide on dyes for dentin labeling, anlyzed by means of a new methodology

2005 ◽  
Vol 13 (3) ◽  
pp. 218-221 ◽  
Author(s):  
Ivaldo Gomes de Moraes ◽  
Fernanda Gomes de Moraes ◽  
Graziela Garrido Mori ◽  
Silvana Beltrami Gonçalves
Keyword(s):  
Methylene Blue ◽  
Calcium Hydroxide ◽  
Rhodamine B ◽  
Distilled Water ◽  
Whitney Test ◽  
Mann Whitney Test ◽  
Significant Difference

The objective of this study was to evaluate the influence of calcium hydroxide in intracanal dressing on the ability of the dyes rhodamine B and methylene blue to label the dentine. Forty extracted human mandibular premolars had their canals instrumented and were divided into four groups: in two groups, the canals were filled with a calcium hydroxide paste and the others remained in distilled water. After 15 days, in two groups (with and without dressing), the canals were obturated with sealer containing methylene blue, whereas the others contained rhodamine B. For analysis, the roots were transversally sectioned in their cervical, medium and apical thirds, and the labeling was analyzed. The Mann-Whitney test showed statistically significant difference between the dressing/methylene blue group and the others. Based on these results, it was concluded that calcium hydroxide in intracanal dressing negatively interferes with the labeling ability of methylene blue.

scholarly journals PENGARUH BERKUMUR SARI BUAH ANGGUR MERAH BERBAGAI KONSENTRASI DAN CHLORHEXIDINE 0,12% TERHADAP INDEKS PLAK

2014 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Henny Henny Eka Putri ◽  
Prima Agusmawanti ◽  
Ade Ismail
Keyword(s):  
Grape Juice ◽  
Plaque Index ◽  
Index Method ◽  
Test Analysis ◽  
Significant Difference ◽  
Quasi Experimental ◽  
Plaque Control ◽  
Red Grape Juice ◽  
Red Grape ◽  
Taking Action

Background: Plaque plays an important role in causing caries and periodontal problems. Plaque control should be done chemically in an effort to reduce the accumulation of plaque in the oral cavity. Juice of red grapes (Vitis vinifera) has a chemical compound as an antibacterial catechins and tannins . The purpose of this study is to determine the effect of rinsing with red grape juice with different concentrations of chlorhexidine and 0.12 % during the 7 day study of the reduction of plaque index. Method: This study is quasi-experimental study which was conducted on 25 students Aisyiyah Orphanage. After Scaling and toothbrush cleaning, each sample rinsed with 10 ml of solution 3 times a day has been accepted in accordance with the treatment without taking action toothbrush for 7 days. Result: The mean plaque index in the treatment group began to experience a gradual decline in the fourth day until the seventh day of the study. From the results of Mann Whitney test analysis found significant differences between the various groups of SBA and chlorhexidine 0.12 % concentration with distilled water on the fourth to the seventh day of the study. But betweenthe SBA 100 % with chlorhexidine 0.12 % there is no significant difference. Conclusion: This can be concluded that rinsing with red grape juice with a concentration of 50 % , 75 % 100 % and chlorhexidine 0.12 % has efficacy in reducing the plaque index. 100 % SBA group is a group of the most effective concentration.

scholarly journals Understanding failures in getting it up: The prevalence and predictors of failed ureteral access in ureteroscopy

2020 ◽  
Vol 15 (3) ◽  
Author(s):  
Callum A. Lavoie ◽  
Max Levine ◽  
Trevor D. Schuler ◽  
Timothy A. Wollin ◽  
Shubha De
Keyword(s):  
Outcome Data ◽  
Ureteral Stones ◽  
Stone Size ◽  
Chi Square ◽  
Test Analysis ◽  
Significant Difference ◽  
Stone Treatment ◽  
Treatment Use ◽  
Improve Patient ◽  
First Diagnosis

Introduction Failed Access ureteroscopy (FA) describes the inability to gain adequate access to a stone to allow for treatment. The purpose of this study was to identify the prevalence of, and factors predicting FA in patients presenting with renal and ureteral stones. Methods: We performed a retrospective review of all uretersocopies for ureteral stones performed by three endourologists over a six month period. All patients who underwent URS for the purpose of stone treatment were included.  Patients were excluded if they underwent ureteroscopy for non-stone diagnosis or treatment. FA was investigated in relation to demographics, medical history, stone specific characteristics, procedure specific characteristics etc. Statistical analysis consisted of descriptive statistics as well as chi-square and t-test analysis using SPSS statistical software version 23.0. Results: 188 cases were reviewed, with 8% of patients experiencing FA. Patient age, gender, BMI, ASA score, emergency cases, previous stone treatment, use of CT imaging, presence of hydronephrosis, and surgeon did not differ significantly between FA and successful access (SA) groups. Stone size (9.88±5.8 vs 8.76±4.3mm; p=0.361) was also not significantly different. However, a significant difference was noted in time from first diagnosis to ureteroscopy (128 vs 65 days; p=0.044) and in stone location 62.5% vs 22.0% proximal ureter; p=0.043; OR=4.77 (1.05-21.64) Conclusions:  Proximal ureteric stones were more likely to result in failed access ureteroscopy, and FA procedures were more likely to be preceded by extended time from first diagnosis to ureteroscopy. Further investigation is necessary, and all endourology centres should track their own personal outcome data in order to allow for more meaningful analysis to be performed to improve patient outcomes.  

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