scholarly journals Evaluation of physico-chemical and mechanical properties of MTA-based root canal sealer

2018 ◽  
Vol 17 ◽  
pp. e181207
Author(s):  
Clauber Romagnoli ◽  
Klíssia Romero Felizardo ◽  
Ricardo Danil Guiraldo ◽  
Alcides Gonini Júnior ◽  
Renan Hideki Kaneshima ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
Root Canal ◽  
Significance Level ◽  
Setting Times ◽  
Physico Chemical ◽  
Ah Plus ◽  
Photoelastic Analysis ◽  
Student’S T ◽  
Root Canal Sealers ◽  
Student’S T Test

Aim: The aim of this study was to evaluate and compare the setting times (ST), flow (FW), radiopacity (RP), dimensional stability (DS), solubility (SB), and polymerization stress (PS) of the MTA Fillapex and AH Plus root canal sealers. Methods: The above qualities were tested according to ISO 6876/2001 standardization. The water used in the dimensional stability test was evaluated to verify the presence of released materials. For the photoelastic analysis, 20 photoelastic resin rings were prepared, and the root canal sealers were inserted. After 24 hours, the specimens were analyzed in a Polariscope. Data of the setting times, flow tests, radiopacity, dimensional stability, and solubility tests were submitted to a Kolgomorov–Smirnov test and then to a Student’s t-test at the 5% significance level. Results: The data derived from photoelastic analyses were submitted to an ANOVA and Tukey’s test with a significance level of 5%. MTA Fillapex and AH Plus complied with ISO 6876/2001. However, there were significant differences (p < 0.05) between the two cements for ST, FW, RP, DS, and SB. MTA Fillapex showed higher FW, SB, and PS when compared with AH Plus. Conclusions: MTA Fillapex and AH Plus complied with ISO 6876/2001 in terms of ST, FW, RP, DS, and SB. MTA Fillapex showed higher PS when compared to AH Plus.

scholarly journals Evaluation of the Physicochemical Properties and Push- Out Bond Strength of Mta-based Root Canal Cement

2013 ◽  
Vol 14 (6) ◽  
pp. 1094-1099 ◽  
Author(s):  
Renato de Toledo Leonardo ◽  
Gisselle Moraima Chávez-Andrade ◽  
Milton Carlos Kuga ◽  
Marco Antonio Hungaro Duarte ◽  
Katia Cristina Keine ◽  
...  
Keyword(s):  
Bond Strength ◽  
Physicochemical Properties ◽  
Root Canal ◽  
Calcium Release ◽  
Setting Time ◽  
Significance Level ◽  
Setting Times ◽  
Ah Plus ◽  
Time Test ◽  
Push Out

ABSTRACT Aim This study investigated the flowability, setting time, pH, calcium release and bond strength of a MTA-based cement (MTA Fillapex®) compared to AH Plus and Sealapex. Materials and methods For the flowability test, the ISO 6876:2001 specification was utilized and for the setting time test, the ASTM C266-03 specification was utilized. For the pH and calcium release measurements, 10 samples were prepared for each group and analyzed for several different periods. For the push-out test, dentin disks were distributed into three groups, according to the cement utilized and into three subgroups, according to the root third (n = 10). After obturation, the specimens underwent push-out testing. The data were compared statistically using a significance level of 5%. Results The flowability of all materials was found to be similar (p > 0.05). The setting times were different among the groups tested (MTA Fillapex < Sealapex < AH Plus) (p < 0.05). At days 7 and 28, the MTA Fillapex presented the higher pH values (p < 0.05). At 24 hours and at 14 days, the calcium release of the MTA Fillapex was similar to that of Sealapex (p > 0.05). AH Plus presented the lowest pH and calcium release values (p < 0.05). In all root thirds, the adhesion to the dentin of the MTA Fillapex and Sealapex were significantly lower than that of AH Plus (p < 0.05). Conclusion MTA Fillapex and Sealapex presented several similar properties and both were found to be different than AH Plus. Clinical significance This study evaluated the physicochemical and mechanical properties of new MTA-based root canal cement, in order to use this scaler in root canal fillings. MTA Fillapex showed satisfactory properties for clinical use. How to cite this article Chávez-Andrade GM, Kuga MC, Duarte MAH, de Toledo Leonardo R, Keine KC, Anna-Junior AS, Só MVR. Evaluation of the Physicochemical Properties and Push-Out Bond Strength of Mta -based Root Canal Cement. J Contemp Dent Pract 2013;14(6):1094-1099.

scholarly journals The nasal index in brazilian human skeletons

2018 ◽  
Vol 17 ◽  
pp. e18337 ◽  
Author(s):  
Larissa Chaves Cardoso Fernandes ◽  
Marcus Vitor Diniz de Carvalho ◽  
Eduardo Daruge Júnior ◽  
Luiz Francesquini Júnior ◽  
Patrícia Moreira Rabello ◽  
...  
Keyword(s):  
Mixed Race ◽  
Cross Sectional Study ◽  
Brazilian Population ◽  
Cross Sectional ◽  
Significance Level ◽  
Human Skulls ◽  
Student’S T ◽  
Digital Caliper ◽  
Student’S T Test

Aim: To investigate the percentage of correctness (PC) of the Nasal Index (NI) in human skeletons for determination of sex, ancestry and estimation of age in the Brazilian population. Methods: This was a cross-sectional study of 173 human skulls belonging to the Piracicaba Dental School. 93 skeletons were males and 80 females; 34 were aged up to 39 years, 56 between 40 and 59 years, and 83 60 years or older; 96 were from white individuals, 49 were from mixed-race and 28 from black individuals. High-precision digital caliper was used to measure nasal height (NH=ANS-nasion) and the maximum nasal width (NW) values, which were applied into the formula NI=NW/NHx100. The data were submitted to discriminant analysis and Student’s t test with equal variances, Mann-Whitney, F (ANOVA), Tukey and Kruskal Wallis, 5% significance level. Results: Dominant nasal type in the Brazilian population was the mesorine. Males showed nasal height and width values greater than those of females, with statistically significant differences in all measurements (p≤0.021) and PC of 76.6%. Similar nasal measurements were found regardless of age (p>0.05), with PC of 41.7%. Ancestral analysis revealed that black individuals have greater nasal width (26.35) and nasal index (53.67) than white ones (24.60 and 49.25), while mixed-race individuals showed intermediate values (25.36 and 52.13) (p<0.05). Nevertheless, these measurements presented an estimated PC of 54.3%. Conclusion: The Nasal Index can be better used for sex determination than for estimation of age and ancestry in the Brazilian population, as the latter showed intermediate and low percentage of correctness, respectively.

scholarly journals Craniometric study of the Orbital Index in brazilian skulls

2021 ◽  
Vol 69 ◽  
Author(s):  
Larissa Chaves Cardoso FERNANDES ◽  
Patrícia Moreira RABELLO ◽  
Bianca Marques SANTIAGO ◽  
Marcus Vitor Diniz de CARVALHO ◽  
Manoel Raimundo de SENA JÚNIOR ◽  
...  
Keyword(s):  
Mixed Race ◽  
Cross Sectional Study ◽  
Southeastern Brazil ◽  
Cross Sectional ◽  
Significance Level ◽  
Brazilian Sample ◽  
Significant Difference ◽  
Student’S T ◽  
The Right ◽  
Student’S T Test

ABSTRACT Objetive To determine the percentage of correctness of the Orbital Index (OI) for estimation of sex, ancestry and age in Brazilian skulls. Methods Cross-sectional study of 183 human dry skulls from the southeastern Brazil. A total of 100 skeletons were males and 83 females; of which 36 were aged up to 39 years, 60 aged between 40 and 59 years, and 87 aged 60 years or older. As for ancestry, 103 were from white, 51 mixed race, and 29 black individuals. The OI was calculate by the formula = height/width x 100. The data were submitted to Student’s t test, F (ANOVA), Tukey and Kruskal Wallis tests as well as to discriminant analysis, with a 5% significance level. Results The sample was characterized as mesoseme, with a mean age of 56.62 (±19.97) years. No significant difference was observed (p=0.511) between the OI in females (right: 86.43 ± 6.58 and left: 86.70 ± 5.93) and males (right: 85.78 ± 6.69 and left: 86.37 ± 6.20). There were no significant differences between age, ancestry and the variables analyzed (p>0.05). The right and left orbital widths were significantly dimorphic between sexes (p<0.001). The percentage of correctness of the method for estimation of sex, age and ancestry was found to be 65.6%, 43.7%, and 43.6%, respectively. Conclusions The OI is not an appropriate method for estimation of sex, ancestry and estimation of age in this Brazilian sample. The methodology should be expanded to other population groups so that it can be improved.

scholarly journals The Penetration Ability of Calcium Silicate Root Canal Sealers into Dentinal Tubules Compared to Conventional Resin-Based Sealer: A Confocal Laser Scanning Microscopy Study

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 531 ◽  
Author(s):  
Yemi Kim ◽  
Ban-Suk Kim ◽  
Yong-Min Kim ◽  
Donghee Lee ◽  
Sin-Young Kim
Keyword(s):  
Root Canal ◽  
Laser Scanning ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Intensity Level ◽  
Single Cone ◽  
Penetration Ability ◽  
Ah Plus ◽  
Root Canal Sealers ◽  
Apical Area

The purpose of this study was to compare the penetration ability of calcium silicate root canal sealers and conventional resin-based sealer using confocal laser scanning microscopy (CLSM). A total of 60 recently extracted single-rooted human premolars were used in this study. The root canals were prepared to a size 40/0.06 taper with ProFile rotary instruments and irrigated with NaOCl and EDTA. After drying all canals, the specimens were randomly divided into three experimental groups (n = 20): Group 1, gutta-percha (GP)/AH Plus with continuous wave compaction; group 2, GP/BioRoot RCS with a single-cone technique; and group 3, GP/Endoseal MTA with a single-cone technique. All experimental samples were sectioned perpendicular to their long axis using a low-speed diamond wheel at the apical, middle, and coronal third levels. The penetration abilities of all samples were evaluated using CLSM. A Kruskal–Wallis analysis and a series of Mann–Whitney U post hoc tests were performed. A higher intensity level was found in the coronal area and a lower intensity level in the apical area in all the experimental groups. The AH Plus group showed higher sum fluorescence intensity in the apical and coronal thirds compared with the BioRoot RCS and Endoseal MTA groups, whereas the BioRoot RCS group showed a higher intensity level in the middle third, similar to the AH Plus group. The maximum sealer penetration depth was low in the apical area and high in the coronal area in the AH Plus and Endoseal MTA groups. In the BioRoot RCS group, maximum sealer penetration was observed in the middle third. In conclusion, there were significant differences in sealer penetration pattern and distance according to the root level and sealer type.

scholarly journals Biocompatibility and Mineralization Activity of Three Calcium Silicate-Based Root Canal Sealers Compared to Conventional Resin-Based Sealer in Human Dental Pulp Stem Cells

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2482 ◽  
Author(s):  
Deog-Gyu Seo ◽  
Donghee Lee ◽  
Yong-Min Kim ◽  
Dani Song ◽  
Sin-Young Kim
Keyword(s):  
Cell Migration ◽  
Root Canal ◽  
Calcium Silicate ◽  
Dental Pulp ◽  
Experimental Period ◽  
Control Groups ◽  
Human Dental Pulp ◽  
Ah Plus ◽  
And Control ◽  
Root Canal Sealers

The purpose of this study was to compare the cytotoxic effects and mineralization activity of three calcium silicate-based root canal sealers to those of a conventional resin-based sealer. Experiments were performed using human dental pulp stem cells grown in a monolayer culture. The root canal sealers tested in this study were EndoSequence BC Sealer (Brasseler), BioRoot RCS (Septodont), Endoseal MTA (Maruchi), and AH Plus (Dentsply DeTrey). Experimental disks 6 mm in diameter and 3 mm in height were made and stored in a 100% humidity chamber at 37 °C for 72 h to achieve setting. The cytotoxicity of various root canal sealers was evaluated using a methyl-thiazoldiphenyl-tetrazolium (MTT) assay. To evaluate cell migration ability, a scratch wound healing method was used, and images of the scratch area were taken using a phase-contrast microscope. Cell morphology was evaluated by a scanning electron microscope after direct exposure for 72 h to each sealer disk. In the cell viability assay, there were no significant differences between the EndoSequence BC, BioRoot RCS, Endoseal MTA, and control groups in any experimental period (p > 0.05). In the cell migration assay, there were no significant differences between the EndoSequence BC, Endoseal MTA, and control groups in any experimental period (p > 0.05). BioRoot RCS exhibited slower cell migration relative to EndoSequence BC and Endoseal MTA for up to 72 h (p < 0.05). Conversely, it showed a similar wound healing percentage at 96 h (p > 0.05). In an evaluation of cell morphology, cells in direct contact with EndoSequence BC, BioRoot RCS, and Endoseal MTA disks showed superior spreading compared to those in contact with the AH Plus disk. In an Alizarin red staining assay, EndoSequence BC, BioRoot RCS, and Endoseal MTA showed a significant increase in mineralized nodule formation compared to the AH Plus group (p < 0.05). In conclusion, all calcium silicate-based root canal sealers tested in this study showed good biological properties and mineralization activity compared to conventional resin-based sealer.

scholarly journals Radiographic analysis of root canal fillings: influence of two sealers on the perception of voids

2010 ◽  
Vol 21 (2) ◽  
pp. 142-147 ◽  
Author(s):  
Augusto Bodanezi ◽  
Etiene de Andrade Munhoz ◽  
Norberti Bernardineli ◽  
Ana Lúcia Álvares Capelozza ◽  
Ivaldo Gomes de Moraes ◽  
...  
Keyword(s):  
Sensitivity And Specificity ◽  
Root Canal ◽  
Ex Vivo ◽  
Radiographic Analysis ◽  
Radiographic Images ◽  
Significance Level ◽  
Root Canals ◽  
Gutta Percha ◽  
Root Canal Sealers

The aim of this ex vivo was to investigate if two radiopaque root canal sealers with different formulations would influence the radiographic perception of root canal fillings. The root canals of 48 extracted maxillary canines were prepared and randomly assigned to 3 groups of 16 specimens each. In each group, the root canals were filled by lateral condensation of gutta-percha and one of the tested sealers: Endométhasone, Sealer 26, or a non-radiopaque sealer. A through-and-through void was simulated in half of the specimens from each group (n=8). The buccolingual radiographic images obtained were randomly interpreted for voids existence by a radiologist and an endodontist. The differences in sensitivity and specificity between groups and examiners were compared using, respectively, Fisher's Exact and McNemar tests at 5% significance level. Both radiopaque sealers caused a significant decrease in sensitivity at the coronal part of fillings. The use of Endométhasone increased specificity values for both coronal and apical portions of the root canal fillings. In conclusion, the tested sealers influenced the radiographic perceptions of laterally condensed root canal fillings in a different way.

scholarly journals Cardiovascular risk in Japanese-Brazilian subjects

2012 ◽  
Vol 56 (9) ◽  
pp. 608-613 ◽  
Author(s):  
Patricia Moreira Gomes ◽  
Regina Célia Garcia de Andrade ◽  
Roberta Carvalho de Figueiredo ◽  
Ana Emília Pace ◽  
Amaury Lelis Dal Fabbro ◽  
...  
Keyword(s):  
Risk Factors ◽  
Cardiovascular Risk ◽  
Ankle Brachial Index ◽  
Significance Level ◽  
Exact Test ◽  
High Prevalence ◽  
Artery Disease ◽  
Student’S T ◽  
Student’S T Test

OBJECTIVE: To evaluate the prevalence of risk factors for cardiovascular disease in Japanese-Brazilian subjects. SUBJECTS AND METHODS: One hundred thirty-one residents of the Mombuca community were studied. Statistical analysis was based on the X² test, Fisher's Exact test, Student's t test, and ANOVA, at a 5% significance level. RESULTS: The average age was 56.7 years-old; 76.3% had dyslipidemia, 24.4% pre-diabetes (PDM), 10.7% type 2 diabetes mellitus (T2DM), 46.6% hypertension, 52.7% abdominal obesity, and 35.8% metabolic syndrome (MS). There were significant correlations between HOMA-IR and MS diagnosis and obesity, while HOMA-β levels were decreased in T2DM and PDM. The ankle-brachial index was positive for peripheral artery disease in 22.3% of the individuals. Electrocardiograms did not show increased evidence of myocardial ischemia. CONCLUSION: Subjects of this community are exposed to major cardiovascular risk factors, namely high prevalence of MS diagnoses and increased HOMA-IR. Arq Bras Endocrinol Metab. 2012;56(9):608-13

A Comparison Study of Periapical Repair in Dogs' Teeth Using RoekoSeal and AH Plus Root Canal Sealers: A Histopathological Evaluation

2008 ◽  
Vol 34 (7) ◽  
pp. 822-825 ◽  
Author(s):  
M LEONARDO ◽  
D FLORES ◽  
F DEPAULAESILVA ◽  
R DETOLEDOLEONARDO ◽  
L DASILVA
Keyword(s):  
Root Canal ◽  
Comparison Study ◽  
Histopathological Evaluation ◽  
Ah Plus ◽  
Root Canal Sealers

An In vitro Evaluation of the Antimicrobial Activity of Nine Root Canal Sealers

2008 ◽  
Vol 9 (5) ◽  
pp. 60-67
Author(s):  
Leena Smadi ◽  
Azmi Mahafzah ◽  
Ameen Khraisat
Keyword(s):  
Antimicrobial Activity ◽  
Root Canal ◽  
Bacterial Strains ◽  
A Value ◽  
Agar Diffusion Test ◽  
Ah Plus ◽  
Microbial Strains ◽  
And Control ◽  
Root Canal Sealers

Abstract Aim The purpose of this in vitro study was to analyze the antimicrobial activity of root canal sealers by using the agar diffusion test (ADT). Methods and Materials Three categories of root canal sealers were included in the study: resin-based sealers (4), zinc oxide-based sealers (3), and calcium hydroxide-based sealers (2). The microbial strains used were: S. aureus (2 strains), C. albicans (2 strains), and E. faecalis (1 strain). Statistical analysis was conducted using a one-way analysis of variance (ANOVA). Tests of differences were analyzed using the Tukey's test with a value of p < 0.05 considered statistically significant. Results The antimicrobial activity of root canal sealers was ranked in descending order as follows: Sealite Regular, Cortisemol, Dentalis KEZ, AH26, Sealapex, Acroseal/Topseal, and Endorez/AH plus. Conclusion Root canal sealers showed different inhibitory effects depending on their types and the bacterial strains tested. Root canal sealers containing formaldehyde and eugenol proved to be effective against the microorganisms studied. Clinical Significance The incorporation of antimicrobial components into root canal sealers may become an essential factor in preventing the re-growth of residual bacteria and control of bacteria re-entry into the root canal system. Citation Smadi L, Mahafzah A, Khraisat A. An In vitro Evaluation of the Antimicrobial Activity of Nine Root Canal Sealers. J Contemp Dent Pract 2008 July; (9)5:060-067.

scholarly journals Diastasis recti abdominis during pregnancy and 12 months after childbirth: prevalence, risk factors and report of lumbopelvic pain

2016 ◽  
Vol 50 (17) ◽  
pp. 1092-1096 ◽  
Author(s):  
Jorun Bakken Sperstad ◽  
Merete Kolberg Tennfjord ◽  
Gunvor Hilde ◽  
Marie Ellström-Engh ◽  
Kari Bø
Keyword(s):  
Risk Factors ◽  
Post Partum ◽  
Fisher Exact Test ◽  
Significance Level ◽  
Exact Test ◽  
Diastasis Recti ◽  
Student’S T ◽  
First Time ◽  
Diastasis Recti Abdominis ◽  
Student’S T Test

Background/aimDiastasis recti abdominis (DRA) is defined as a separation of the 2 muscle bellies of rectus abdominis. To date there is scant knowledge on prevalence, risk factors, and consequences of the condition. The present study aimed to investigate the prevalence of DRA during pregnancy and post partum, presence of possible risk factors, and the occurrence of lumbopelvic pain among women with and without DRA.MethodsThis prospective cohort study followed 300 first-time pregnant women from pregnancy till 12 months post partum. Data were collected by electronic questionnaire and clinical examinations. DRA was defined as a palpated separation of ≥2 fingerbreadths either 4.5 cm above, at or 4.5 cm below the umbilicus. Women with and without DRA were compared with independent samples Student's t-test and χ2/Fisher exact test, and OR with significance level >0.05.ResultsPrevalence of DRA was 33.1%, 60.0%, 45.4%, and 32.6% at gestation week 21, 6 weeks, 6 months and 12 months post partum, respectively. No difference in risk factors was found when comparing women with and without DRA. OR showed a greater likelihood for DRA among women reporting heavy lifting ≥20 times weekly (OR 2.18 95% CI 1.05 to 4.52). There was no difference in reported lumbopelvic pain (p=0.10) in women with and without DRA.ConclusionsPrevalence of mild DRA was high both during pregnancy and after childbirth. Women with and without DRA reported the same amount of lumbopelvic pain 12 months post partum.

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