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1.
Oper Dent ; 38(1): 3-11, 2013.
Article in English | MEDLINE | ID: mdl-22856680

ABSTRACT

This study evaluated the five-year clinical performance of ceramic inlays and onlays made with two systems: sintered Duceram (Dentsply-Degussa) and pressable IPS Empress (Ivoclar Vivadent). Eighty-six restorations were placed by a single operator in 35 patients with a median age of 33 years. The restorations were cemented with dual-cured resin cement (Variolink II, Ivoclar Vivadent) and Syntac Classic adhesive under rubber dam. The evaluations were conducted by two independent investigators at baseline, and at one, two, three, and five years using the modified United States Public Health Service (USPHS) criteria. At the five-year recall, 26 patients were evaluated (74.28%), totalling 62 (72.09%) restorations. Four IPS restorations were fractured, two restorations presented secondary caries (one from IPS and one from Duceram), and two restorations showed unacceptable defects at the restoration margin and needed replacement (one restoration from each ceramic system). A general success rate of 87% was recorded. The Fisher exact test revealed no significant difference between Duceram and IPS Empress ceramic systems for all aspects evaluated at different recall appointments (p>0.05). The McNemar chi-square test showed significant differences in relation to marginal discoloration, marginal integrity, and surface texture between the baseline and five-year recall for both systems (p<0.001), with an increased percentage of Bravo scores. However, few Charlie or Delta scores were attributed to these restorations. In conclusion, these two types of ceramic materials demonstrated acceptable clinical performance after five years.


Subject(s)
Dental Porcelain/chemistry , Dental Prosthesis Design , Inlays , Adult , Aluminum Silicates/chemistry , Cementation/methods , Color , Dental Caries/etiology , Dental Cavity Preparation/classification , Dental Marginal Adaptation , Dental Polishing/methods , Dental Restoration Failure , Dentin Sensitivity/etiology , Female , Follow-Up Studies , Humans , Male , Prospective Studies , Resin Cements/chemistry , Self-Curing of Dental Resins/methods , Surface Properties , Treatment Outcome
2.
Oper Dent ; 36(3): 274-80, 2011.
Article in English | MEDLINE | ID: mdl-21834710

ABSTRACT

OBJECTIVE: To evaluate, through the application of different dentin bonding systems, the influence of wetness on shear bond strength in enamel. METHODS: This study evaluated three etch-and-rinse adhesive systems (Scotchbond MP [used with and without primer]; Singlebond; and Prime&Bond 2.1) and two self-etching adhesive systems (Clearfil SE Bond; and Xeno IV). Flat bovine enamel surfaces were either air-dried for 30 seconds or blotted with absorbent paper after acid-etching for the conventional bonding agents or before the application of self-etching bonding agents. The resin composite EsthetX was bonded to flat surfaces that had been treated with one of the adhesives, following the manufacturer's instructions. After being stored in water at 37°C for one week, bonded specimens were broken in shear. Data were evaluated with two-way analysis of variance (ANOVA) and Student-Newman-Keuls tests (α=0.05). For comparing each condition individually, regardless of the adhesive or wetness condition, a one-way ANOVA and a Student-Newman-Keuls test (α=0.05) were applied. RESULTS: The two-way ANOVA showed significant differences among adhesive systems. An interaction effect was also observed (p<0.05), but wetness did not influence shear bond strength (p=0.98). The one-way ANOVA showed that the all-in-one adhesive was the only material influenced by the presence of water at the enamel's surface. CONCLUSION: The all-in-one adhesive behaved differently depending on whether the enamel surface was dry or wet.


Subject(s)
Dental Bonding , Dental Enamel/ultrastructure , Dentin-Bonding Agents/chemistry , Water/chemistry , Acetone/chemistry , Acid Etching, Dental/methods , Air , Animals , Bisphenol A-Glycidyl Methacrylate/chemistry , Cattle , Composite Resins/chemistry , Dental Materials/chemistry , Dental Stress Analysis/instrumentation , Desiccation , Materials Testing , Paper , Polymethacrylic Acids/chemistry , Resin Cements/chemistry , Shear Strength , Stress, Mechanical , Temperature , Time Factors
3.
Caries Res ; 40(5): 389-92, 2006.
Article in English | MEDLINE | ID: mdl-16946606

ABSTRACT

This study evaluated the survival of class III and V restorations using the atraumatic restorative treatment (ART) approach in permanent anterior teeth, after 3 years. A total of 151 restorations were performed in 60 patients. After 3 years, 107 restorations (47 patients) were evaluated. Data were analyzed using exact 95% confidence interval. A total of 97 restorations (91% with 95% CI = 83-99), 76 class III (92% with 95% CI = 82-100) and 21 class V (88% with 95% CI = 77-98) were classified as successful. The survival rate of the ART approach in class III and V restorations in permanent anterior teeth was considered high.


Subject(s)
Dental Caries/therapy , Dental Restoration Failure , Dental Restoration, Permanent/methods , Adolescent , Adult , Cuspid , Dental Cavity Preparation/methods , Female , Follow-Up Studies , Glass Ionomer Cements , Humans , Incisor , Male , Middle Aged
4.
Oper Dent ; 29(2): 157-61, 2004.
Article in English | MEDLINE | ID: mdl-15088726

ABSTRACT

Volumetric polymerization shrinkage of three resin composites (Suprafil, Z100 and Filtek P60) was determined using four light curing methods: method 1: continuous output with conventional intensity light; method 2: continuous output with higher intensity light; method 3: ramp output and method 4: pulse-delay output. Five disc-shaped specimens were prepared from each material for each curing method. Specimen weight was determined with an analytical electronic hydrostatic balance in air and in water before and after curing. Specific gravity values were then determined. Volumetric polymerization shrinkage was calculated using mathematical formulas. Mean volumetric polymerization shrinkage ranged from 1.882 (.015)% to 2.169 (.028)%. ANOVA indicated significant differences among the materials (p<.05). Light curing methods had no effect on volumetric polymerization shrinkage except for Z-100, where method 2 resulted in significantly higher shrinkage than methods 1 and 4. Suprafil shrunk significantly less than the other two materials in all curing methods.


Subject(s)
Composite Resins/chemistry , Composite Resins/radiation effects , Analysis of Variance , Dental Equipment , Dental Marginal Adaptation , Dental Stress Analysis , Light , Materials Testing , Molecular Structure , Phase Transition , Polymers/chemistry , Silicon Dioxide/chemistry , Silicon Dioxide/radiation effects , Statistics, Nonparametric , Zirconium/chemistry , Zirconium/radiation effects
5.
Oper Dent ; 29(2): 123-30, 2004.
Article in English | MEDLINE | ID: mdl-15088722

ABSTRACT

This study evaluated the clinical performance of ceramic inlays and onlays made with two systems: sintered (Duceram, Dentsply-Degussa)--D and pressable (IPS Empress, Ivoclar-Vivadent)--IPS after two years. Eighty-six restorations, 44 IPS and 42 D, were cemented into the mouths of 35 patients. Twenty-seven premolars and 59 molars received Class II preparations totaling 33 onlays and 53 inlays. All restorations were cemented with dual-cured resin cement (Variolink II, Ivoclar-Vivadent) and Syntac Classic adhesive under rubber dam. The evaluations were conducted by two independent investigators at the baseline and after one and two years using the modified USPHS criteria. Additionally, radiographs and slides were made. After two years, 100% of the restorations were assessed and all the restorations were considered clinically excellent or acceptable. Among the analyzed criteria, the following received Bravo ratings: marginal discoloration--IPS (31.82%), D (23.81%); marginal integrity--IPS (18.18%), D (11.9%), color match-IPS (4.55%), D (9.52%) and surface texture-IPS (2.27%); D (14.29%). No "Charlie" or "Delta" scores were attributed to the restorations. The results were subjected to the Fisher and McNemar Statistical Tests. No significant differences were noticed between the two ceramic materials. Among the analyzed criteria, only marginal discoloration presented an increased percentage of "Bravo" scores that increased with time for both ceramic materials. Compared with the baseline data, the difference was statistically significant (p < 0.05). No difference was found between inlay and onlay restorations or between restorations placed in premolars or molars. In conclusion, these two types of ceramic materials demonstrated excellent clinical performance after two years.


Subject(s)
Aluminum Silicates , Dental Porcelain , Inlays , Adult , Bicuspid , Cementation , Dental Cavity Preparation , Dental Prosthesis Design , Dental Restoration Failure , Female , Humans , Male , Matched-Pair Analysis , Molar , Resin Cements , Treatment Outcome
6.
Clin Oral Investig ; 7(3): 123-8, 2003 Sep.
Article in English | MEDLINE | ID: mdl-12915962

ABSTRACT

The purpose of this study was to evaluate the clinical performance of two "packable" posterior composites: Prodigy Condensable/Optibond Solo-Kerr (PC-OS) and Definite/Etch & Prime-Degussa (D-EP). Thirty-six patients participated in this study. A total of 78 restorations (40 with D-EP and 38 with PC-OS) were made. Each patient received at least two restorations (one of each studied material). The materials were handled according to the manufacturer's instructions. The occlusal adjustments were made at the placement visit. The restorations were finished and polished after 1 week. They were evaluated at baseline, and after 1 year and 2 years by two independent evaluators using the USPHS criteria. Colored slides were made of all the restorations. After 2 years, 34 patients and 74 restorations (38 with D-EP and 36 with PC-OS) were available for evaluation. A total of 50% of PC-OS restorations received A criterion and 50% received B criterion (2.8% color, 11.1% marginal staining, 27.8% superficial staining, 2.8% anatomic form and 5.6% marginal adaptation). For D-EP, 60.5% of restorations received A criterion and 39.5% received B criterion (2.6% color, 5.3% marginal staining, 10.5% superficial staining, 7.9% anatomic form and 13.2% marginal adaptation). The C criterion was observed only for marginal adaptation with D-EP (2 restorations-5.3%). The obtained data were tabulated and statistically analyzed using the Fisher, Chi-square and McNemar tests. After 2 years, PC-OS showed a significant increase in superficial and marginal staining. For D-EP the marginal adaptation and superficial staining became significantly worse than baseline.


Subject(s)
Composite Resins/chemistry , Dental Restoration, Permanent , Adult , Bisphenol A-Glycidyl Methacrylate/chemistry , Chi-Square Distribution , Color , Dental Cavity Preparation , Dental Marginal Adaptation , Dental Polishing , Dental Restoration, Permanent/methods , Diphosphates/chemistry , Ethanol/chemistry , Female , Follow-Up Studies , Humans , Male , Methacrylates/chemistry , Resin Cements/chemistry , Siloxanes/chemistry , Surface Properties , Terpenes/chemistry
7.
Clin Oral Investig ; 6(2): 79-83, 2002 Jun.
Article in English | MEDLINE | ID: mdl-12166718

ABSTRACT

The purpose of this study was to evaluate the clinical performance of two "packable" posterior composites: Prodigy Condensable (P) (Kerr) and Definite (D) (Degussa). Thirty-six patients participated in the study. A total of 78 restorations were made, 40 with D and 38 with P. Each patient received at least two restorations, one of each studied material. The materials were handled according to the manufacturer's instructions. The restorations were finished and polished after 1 week. They were evaluated at baseline and after 1 year by two independent evaluators using the United States Public Health Service (USPHS) criteria. Colored slides were made of all the restorations. After 1 year, 35 patients and 76 restorations (39 with D and 37 with P) were available for evaluation. All restorations received A criteria except the following ones, which received B criteria: color P (one restoration) and D (one restoration), marginal staining P (three restorations) and D (two restorations), surface staining P (nine restorations) and D (three restorations), anatomic form P (one restoration) and D (three restorations), and marginal adaptation P (one restoration) and D (eight restorations). The obtained data were tabulated and statistically analyzed using the Fisher and McNemar tests. After 1 year, P showed a significant increase in superficial staining. For D, the marginal adaptation became significantly worse than baseline and P. The studied materials can be considered acceptable during this evaluation period. Further evaluations are necessary for a better clinical performance analysis.


Subject(s)
Composite Resins , Dental Restoration, Permanent , Acid Etching, Dental , Bisphenol A-Glycidyl Methacrylate/chemistry , Calcium Hydroxide/chemistry , Color , Composite Resins/chemistry , Dental Cavity Preparation/classification , Dental Cavity Preparation/methods , Dental Marginal Adaptation , Dental Polishing , Dental Pulp Capping , Dentin-Bonding Agents/chemistry , Diphosphates/chemistry , Ethanol/chemistry , Female , Follow-Up Studies , Glass Ionomer Cements/chemistry , Humans , Male , Methacrylates/chemistry , Minerals/chemistry , Resin Cements/chemistry , Siloxanes/chemistry , Statistics as Topic , Surface Properties , Terpenes/chemistry
8.
Braz Dent J ; 12(3): 201-4, 2001.
Article in English | MEDLINE | ID: mdl-11696919

ABSTRACT

The aim of this study was to analyze the diametral tensile strengths of three resin-modified restorative glass ionomer cements--Vitremer, Fuji II LC and Photac Fil and one compomer--Dyract. They were tested at 1 hour, 1 day and 1 week. Kratos testing machine was used to load the specimens at a cross-head speed of 0.5 mm/min. The data were analyzed by two-way ANOVA and Tukey's test that showed statistically significant differences among the materials. The tested materials presented an increase in strength from 1 hour to 1 week and were as follows for each material respectively: Vitremer (19.22-27.29), Fuji II LC (23.91-28.67), Photac Fil (19.35-22.86), Dyract (28.83-46.95). Dyract presented the highest strengths.


Subject(s)
Compomers , Dental Bonding , Glass Ionomer Cements , Analysis of Variance , Composite Resins , Materials Testing , Methacrylates , Polymers/chemistry , Resins, Synthetic , Silicates , Statistics, Nonparametric , Tensile Strength , Time Factors
9.
Am J Dent ; 11(4): 181-4, 1998 Aug.
Article in English | MEDLINE | ID: mdl-10388373

ABSTRACT

PURPOSE: To determine the effect of cusp coverage with amalgam restorations on the fracture strength of weakened human maxillary premolars. MATERIALS AND METHODS: 30 extracted human maxillary premolars were divided into three groups; Group A (control): uncut teeth, Group B: wide MOD cavities prepared and the pulp chamber's roof removed. The teeth were restored with amalgam without cusp coverage, Group C: same as Group B plus cusp reduction and restored with amalgam. The teeth were included in metal rings with self-curing polystyrene resin and stored in water for 24 hrs. The restorations were refined with rubber points, polished and further stored in water for 24 hrs before being subjected to a compressive axial load in a Universal testing machine at 0.5 mm/min. RESULTS: The mean fracture strength obtained was: Group A: 173.3 Kgf, Group B: 47.3 Kgf and Group C: 127.7 Kgf. All values were statistically significantly different (P < 0.05). The amalgam restoration of weakened human premolars with cusp coverage amalgam significantly increased the fracture strength of the teeth (63%) as compared to teeth restored without cusp coverage. The results showed that cusp coverage with amalgam might be an option for restoring weakened endodontically-treated teeth.


Subject(s)
Dental Amalgam , Dental Cavity Preparation/methods , Tooth Fractures/prevention & control , Analysis of Variance , Bicuspid , Dental Stress Analysis , Humans
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