Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 5 de 5
Filter
Add more filters










Language
Publication year range
1.
Dent Mater J ; 35(6): 881-887, 2016 Dec 01.
Article in English | MEDLINE | ID: mdl-27680033

ABSTRACT

The shear bond strength (SBS) of TheraCal LC to resin composite was evaluated in comparison to Mineral trioxide aggregate (ProRoot MTA) and conventional glass ionomer cement (GIC) using two adhesive systems. A hole was prepared in 90 acrylic blocks (6 mm diameter, 2 mm deep) then filled with TheraCal LC, MTA or Fuji IX (n=30/group). Each group was bonded with either an etch and rinse or 1-step self-etch adhesive. Filtek Z250 composite was bonded to each capping material. Bond strength was tested in a universal testing machine, and data were analyzed using 2-way ANOVA and Duncan's Multiple range test (p<0.05). TheraCal LC displayed the highest SBS (p<0.001). MTA bonded with the 1-step self-etch adhesive showed the lowest SBS (p<0.001), while SBS of TheraCal LC and Fuji IX did not differ between either adhesive (p>0.05). TheraCal LC is the preferred choice in pulp capping procedures when using resin composite restorations.


Subject(s)
Composite Resins , Dental Cements , Calcium , Dental Bonding , Dental Pulp Capping , Glass Ionomer Cements , Materials Testing , Resin Cements , Shear Strength
2.
J Contemp Dent Pract ; 17(1): 16-21, 2016 Jan 01.
Article in English | MEDLINE | ID: mdl-27084857

ABSTRACT

AIM: The aim of this study was to evaluate the factors influencing the satisfaction of dental appearance and attitude toward treatments to improve dental esthetics among patients attending a dental teaching center. METHODS: A questionnaire was used to collect data of four background variables among 450 patients attended a dental teaching center in the city of Irbid in Jordan. The questionnaire enclosed self-reported questions about the appearance of anterior teeth, received esthetic treatment and desired treatment for improving esthetics. Descriptive, multiple logistic regression and Chi-square tests were used for data analysis (p ≤ 0.05). RESULTS: The 450 participants consisted of (66.2%) male and (33.8%) female. Of these, 69.3% were satisfied with their dental appearance and 58.0% with the color of their teeth. Esthetic restorations were the most received treatment (39.8%) and whitening of teeth was the most desired treatment (55.3%). The patients' satisfaction with dental appearance was influenced by teeth color, crowding and receiving whitening (p < 0.05. r = 0.561, r(2) = 0.315). The most desired esthetic treatments influenced by the satisfaction with dental appearance were esthetic restorations and orthodontics (p < 0.05. r = 0.223, r(2) = 0.05). Significantly more female reported having esthetic restorations and orthodontics (p = 0.008, 0.000) and desired to have orthodontic, crowns or veneers and esthetic restorations (p = 0.000, 0.015, 0.028). CONCLUSION: Satisfaction with dental appearance was affected by teeth color, feeling teeth are crowded, desire for esthetic restorations and orthodontic treatment. A high percentage of patients were not satisfied with the color of their teeth. CLINICAL SIGNIFICANCE: Recognizing the factors that affect patients' satisfaction with their present dental appearance and attitude toward treatments to improve dental esthetic can guide clinicians to strategies to improve esthetics.


Subject(s)
Esthetics, Dental , Patient Satisfaction , Adult , Education, Dental , Female , Humans , Jordan , Male , Malocclusion , Tooth Bleaching
3.
Braz Oral Res ; 302016.
Article in English | MEDLINE | ID: mdl-26910018

ABSTRACT

The aim of this study is to evaluate the solubility of a Mineral Trioxide Aggregate sealer (MTA-Fillapex) compared with five other sealers, calcium hydroxide (Sealapex), resin (Realseal), zinc oxide-eugenol (Tubli-Seal), and two epoxy resins (AH-26 and AH-Plus), in chloroform and eucalyptoil in static and ultrasonic environments. Samples of each sealer were prepared (n = 180) and then divided into 12 groups that were immersed in solvents for 5 and 10 min in static and ultrasonic environments. The mean weight loss was determined, and the values were compared using Student's t-test, One-way ANOVA, and Tukey's HSD post-hoc test (p < 0.05). In chloroform, MTA-Fillapex, AH-26, and Sealapex displayed moderate solubility with no significant difference in dissolution (p = 0.125); however, their dissolution was significantly lower than that of AH-Plus (p < 0.001), which was almost fully dissolved after 10 minutes. Realseal was significantly less soluble than all sealers (p < 0.001). In eucalyptoil, MTA-Fillapex showed low solubility, as all of the sealers did, but Tubli-Seal was significantly more soluble than other sealers (p < 0.001). Using ultrasonic activation resulted in a significantly higher dissolution rate in chloroform for all sealers except MTA-Fillapex after 10 min (p = 0.226). In eucalyptoil, ultrasonic activation significantly increased the dissolution rate of all sealers except MTA-Fillapex after 5 and 10 min, Sealapex at 10 min, and AH-Plus at 5 min (p > 0.05). In conclusion, MTA-Fillapex was not sufficiently dissolved in either solvent. Ultrasonic activation had limited effectiveness on MTA-Fillapex dissolution, whereas it significantly increased the efficiency of solvents in dissolving a number of endodontic sealers.


Subject(s)
Aluminum Compounds/chemistry , Calcium Compounds/chemistry , Chloroform/chemistry , Cyclohexanols/chemistry , Monoterpenes/chemistry , Oxides/chemistry , Root Canal Filling Materials/chemistry , Silicates/chemistry , Solvents/chemistry , Analysis of Variance , Bismuth/chemistry , Calcium Hydroxide/chemistry , Drug Combinations , Epoxy Resins/chemistry , Eucalyptol , Immersion , Materials Testing , Reference Values , Reproducibility of Results , Salicylates/chemistry , Silver/chemistry , Solubility , Time Factors , Titanium/chemistry , Ultrasonic Waves , Zinc Oxide-Eugenol Cement/chemistry
4.
Braz. oral res. (Online) ; 30(1): e16, 2016. tab, graf
Article in English | LILACS | ID: biblio-952011

ABSTRACT

Abstract The aim of this study is to evaluate the solubility of a Mineral Trioxide Aggregate sealer (MTA-Fillapex) compared with five other sealers, calcium hydroxide (Sealapex), resin (Realseal), zinc oxide-eugenol (Tubli-Seal), and two epoxy resins (AH-26 and AH-Plus), in chloroform and eucalyptoil in static and ultrasonic environments. Samples of each sealer were prepared (n = 180) and then divided into 12 groups that were immersed in solvents for 5 and 10 min in static and ultrasonic environments. The mean weight loss was determined, and the values were compared using Student's t-test, One-way ANOVA, and Tukey's HSD post-hoc test (p < 0.05). In chloroform, MTA-Fillapex, AH-26, and Sealapex displayed moderate solubility with no significant difference in dissolution (p = 0.125); however, their dissolution was significantly lower than that of AH-Plus (p < 0.001), which was almost fully dissolved after 10 minutes. Realseal was significantly less soluble than all sealers (p < 0.001). In eucalyptoil, MTA-Fillapex showed low solubility, as all of the sealers did, but Tubli-Seal was significantly more soluble than other sealers (p < 0.001). Using ultrasonic activation resulted in a significantly higher dissolution rate in chloroform for all sealers except MTA-Fillapex after 10 min (p = 0.226). In eucalyptoil, ultrasonic activation significantly increased the dissolution rate of all sealers except MTA-Fillapex after 5 and 10 min, Sealapex at 10 min, and AH-Plus at 5 min (p > 0.05). In conclusion, MTA-Fillapex was not sufficiently dissolved in either solvent. Ultrasonic activation had limited effectiveness on MTA-Fillapex dissolution, whereas it significantly increased the efficiency of solvents in dissolving a number of endodontic sealers.


Subject(s)
Oxides/chemistry , Root Canal Filling Materials/chemistry , Solvents/chemistry , Chloroform/chemistry , Silicates/chemistry , Calcium Compounds/chemistry , Aluminum Compounds/chemistry , Cyclohexanols/chemistry , Monoterpenes/chemistry , Reference Values , Silver/chemistry , Solubility , Time Factors , Titanium/chemistry , Zinc Oxide-Eugenol Cement/chemistry , Bismuth/chemistry , Materials Testing , Calcium Hydroxide/chemistry , Salicylates/chemistry , Reproducibility of Results , Analysis of Variance , Drug Combinations , Epoxy Resins/chemistry , Ultrasonic Waves , Eucalyptol , Immersion
5.
J Am Dent Assoc ; 144(8): 922-7, 2013 Aug.
Article in English | MEDLINE | ID: mdl-23904579

ABSTRACT

BACKGROUND: The authors conducted a study to examine the irradiance from light-curing units (LCUs) used in dental offices in Jordan. METHODS: Two of the authors visited 295 private dental offices (15 percent) in Jordan and collected the following information about the LCUs: age, type (quartz-tungsten-halogen or light-emitting diode), date of last maintenance, type of maintenance, last date of use, number of times used during the day, availability of a radiometer, exposure time for each resin-based composite increment, size of light-curing tips and presence of resin-based composite on the tips. The authors used a radiometer to measure the irradiance from the LCUs. They used linear regression with stepwise correlation for the statistical analysis. The authors set the minimum acceptable irradiance at 300 milliwatts/square centimeter. RESULTS: The mean irradiance of the 295 LCUs examined was 361 mW/cm(2), and 136 LCUs (46.1 percent) delivered an irradiance of less than 300 mW/cm(2). The unit's age, type and presence of resin-based composite on the light-curing tips had a significant effect on the irradiance (P ≤ .001). CONCLUSIONS: Only 37 of the 141 quartz-tungsten-halogen units (26.2 percent) and 122 of the 154 light-emitting diode units (79.2 percent) delivered at least 300 mW/cm(2). Resin contamination on the light-curing tips had a significant effect on the irradiance delivered. The irradiance from the LCUs decreased with use. Practical Implications. The irradiance from many of the units in this study was less than 300 mW/cm(2), which may affect the quality of resin-based composite restorations. Dentists should monitor the performance of the LCUs in their offices weekly.


Subject(s)
Curing Lights, Dental/statistics & numerical data , Radiation Dosage , Composite Resins/radiation effects , Curing Lights, Dental/classification , Curing Lights, Dental/standards , Dental Materials/radiation effects , Dental Offices , Equipment Contamination , Equipment Design , Humans , Jordan , Maintenance , Private Practice , Radiometry/instrumentation , Surface Properties , Time Factors
SELECTION OF CITATIONS
SEARCH DETAIL
...