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1.
J Adhes Dent ; 23(3): 201-215, 2021 Jun 05.
Artículo en Inglés | MEDLINE | ID: mdl-34060300

RESUMEN

PURPOSE: Mild and intermediately strong 2-step self-etch adhesives (2SEa) have been shown to bond efficiently to dentin. In general, their bonding efficiency to enamel is inferior to that of etch & rinse adhesives (E&Ra). On the other hand, their application procedure is less elaborate, and consequently leaves less room for application mistakes. The aim of this randomized controlled trial was to evaluate the clinical performance of an intermediately strong 2SEa, as compared with that of a 3-step E&Ra after 6 years of clinical functioning. MATERIALS AND METHODS: 239 non-carious cervical lesions in 50 patients were restored with the nanohybrid composite Herculite XRV (Kerr), bonded in random order either with the 2SEa Optibond XTR ('O-XTR', Kerr) or the gold-standard control 3E&Ra Optibond FL ('O-FL', Kerr). The restorations were recalled after 1, 2 and 6 years of clinical service and examined for retention, marginal adaptation, marginal discoloration, caries occurrence, and postoperative sensitivity. Statistical analysis was performed using a logistic regression model with generalized estimating equations (2-way GEE model). RESULTS: The patient recall rate at 6 years was 94%. The overall clinical success rate was 81.9% and 80.9% for O-XTR and O-FL, respectively. In total, 42 restorations (21 O-XTR, 21 O-FL) failed because of retention loss, severe abfraction/abrasion/erosion, severe marginal defects and/or discoloration, and/or caries. A retention rate of 92.9% and 88.9% was recorded for O-XTR and O-FL, respectively. Progressive marginal deterioration was observed over the 6-year period. Small clinically acceptable marginal defects were recorded in about 70% of the restorations (O-XTR: 69.9%; O-FL: 74.1%). Regarding marginal discoloration, 37% of the O-XTR and 30.2% of the O-FL restorations showed superficial clinically acceptable marginal discoloration. Six O-XTR and 4 O-FL restorations exhibited caries at the restoration margin. No significant difference was observed between the two groups for any of the evaluated parameters (p > 0.05). CONCLUSION: After 6 years of clinical service, Class-V restorations bonded with the 2SEa performed clinically equally well as those bonded with the 3E&Ra.


Asunto(s)
Restauración Dental Permanente , Cuello del Diente , Cementos Dentales , Esmalte Dental , Adaptación Marginal Dental , Humanos
2.
J Adhes Dent ; 23(3): 233-242, 2021 Jun 05.
Artículo en Inglés | MEDLINE | ID: mdl-34060303

RESUMEN

PURPOSE: To investigate the effects of several etching products prior to the application of a one-step self-etch adhesive (1-SEA) or two-step self-etch adhesive (2-SEA) on enamel by microshear bond strength (µSBS) testing and observation of the adhesive-enamel interface. MATERIALS AND METHODS: Ground human enamel surfaces were randomly assigned to one of eight groups according to the combination of surface treatments (either no conditioner [NC], ME [Multi Etchant], EC [Enamel Conditioner], or KE [K-etchant Gel]) and adhesive (ADU [Adhese Universal] or SE2 [Clearfil SE Bond 2]). All groups were further divided into two subgroups: 0 or 10,000 thermal cycles (TC). Then, the µSBS test was performed. The adhesive-enamel interface after acid-base challenge and the surface structure after conditioner application were also observed. RESULTS: With 10,000 TCs, there was no statistically significant difference between ME-ADU and NC-ADU. On the other hand, the µSBS of EC-ADU or KE-ADU was significantly higher than that of NC-ADU, while that of ME-SE2 was significantly lower than NC-SE2. There was no significant difference between EC-SE2, NC-SE2, and KE-SE2. Formation of an acid-base resistance zone (ABRZ) was confirmed in all groups. However, funnel-shaped erosion, which indicates interfacial defects, was observed in the NC-ADU, ME-ADU, and ME-SE2 groups. CONCLUSION: For enamel bonding, application of EC or KE prior to ADU increased the bond strength and created a stable adhesive-enamel interface. On the other hand, SE2 also had stable shear bond strength and interface without the use of conditioners. However, ME decreased the bonding performance of SE2.


Asunto(s)
Grabado Ácido Dental , Recubrimiento Dental Adhesivo , Cementos Dentales , Esmalte Dental , Humanos , Ensayo de Materiales
3.
Artículo en Inglés | MEDLINE | ID: mdl-34076645

RESUMEN

The influence of the layer thickness and composite shade on the final color of Ceram.X composites (Dentsply Sirona) was tested, selecting five intermediate-translucency Ceram.X Universal shades, three high-translucency Ceram.X Duo "enamel" shades, and four low-translucency Ceram.X Duo "dentin" shades. Using cylindrical molds, 850 specimens were obtained, representing the whole array of possible Universal single specimens (in seven thicknesses, ranging from 1.0 to 4.0 mm in 0.5-mm increments) and Duo combinations. The CIELAB coordinates of each specimen were determined with a spectrophotometer. Different thicknesses and composites were compared with Clark's ΔE. The difference in color among specimens of different thicknesses was material-dependent. The thickness and shade of the composite markedly affected the color yield of the Ceram.X system. For each shade of the Universal systems, only one Duo enamel-dentin combination corresponded.


Asunto(s)
Resinas Compuestas , Materiales Dentales , Color , Esmalte Dental , Humanos , Ensayo de Materiales , Espectrofotometría
4.
Am J Dent ; 34(2): 75-79, 2021 04.
Artículo en Inglés | MEDLINE | ID: mdl-33940663

RESUMEN

PURPOSE: To compare the bleaching efficacy of in-office (Opalescence), professional home (LumiBrite), over the counter (WhiteLight) and natural (strawberry extract) bleaching agents. METHODS: 80 teeth were selected and divided into two groups which were stained with black coffee and red wine respectively. The stained specimens were subdivided into four subgroups to be bleached with Opalescence, LumiBrite, WhiteLight and strawberry extract. Color measurements were made using spectrophotometer at baseline level, after staining, after bleaching and 1 week after bleaching. The ΔE00 was calculated post bleaching (ΔE001), after 1-week follow up (ΔE002) and color changes between 1-week follow up and baseline (ΔE003). Data were analyzed by paired t-test and ANOVA with a significant difference of P< 0.05. RESULTS: Paired t-test showed significant differences in ΔE001 and ΔE002 for both stained specimens (P< 0.001). For black coffee stained specimens, Whitelight had significantly higher ΔE002 compared to the other bleaching agents (P< 0.05). For red wine stain, Whitelight also showed the significantly lowest ΔE001 (P< 0.001) and the highest ΔE002 (P< 0.001) compared to other groups. LumiBrite showed the significantly lowest ΔE003 for red wine stained specimens (P< 0.05). Whitelight had the poorest bleaching efficacy with deterioration effect after 1-week follow up. Opalescence, LumiBrite and strawberry extract had clinically perceptible and comparable bleaching efficacy. Strawberry extract appeared to be a potential natural bleaching agent with a desirable effect. CLINICAL SIGNIFICANCE: Commercial tooth bleaching agents can cause several undesirable side effects such as damage to enamel, hypersensitivity and even affecting the pulp. Strawberry extract is a natural, effective bleaching agent that may have reduced side effects.


Asunto(s)
Blanqueadores , Blanqueadores Dentales , Color , Esmalte Dental , Espectrofotometría
5.
Compend Contin Educ Dent ; 42(4): 188-191, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33960804

RESUMEN

Enduring glass-ceramic restorations greatly depend on the quality of adhesion of the crown to enamel and dentin. Proper isolation is vital to the success of bonded ceramic restorations. The rubber dam has long been considered the primary method of preventing contamination of the operating field, a crucial requisite for adhesion. However, many dentists do not use rubber dam isolation due to its penchant for slowing down procedures. The authors present a case report that describes a technique for the indirect bonding of a ceramic restoration to a maxillary first molar using rubber dam isolation in conjunction with a floss ligature,a method that is aimed at optimizing operator effectiveness and efficiency.


Asunto(s)
Litio , Dique de Goma , Cerámica , Coronas , Esmalte Dental , Porcelana Dental , Humanos , Diente Molar , Cementos de Resina
8.
BMC Oral Health ; 21(1): 255, 2021 05 12.
Artículo en Inglés | MEDLINE | ID: mdl-33980210

RESUMEN

BACKGROUND: Few studies have addressed the clinical parameters' predictive power related to caries lesion associated with their progression. This study assessed the predictive validity and proposed simplified models to predict short-term caries progression using clinical parameters related to caries lesion activity status. METHODS: The occlusal surfaces of primary molars, presenting no frank cavitation, were examined according to the following clinical predictors: colour, luster, cavitation, texture, and clinical depth. After one year, children were re-evaluated using the International Caries Detection and Assessment System to assess caries lesion progression. Progression was set as the outcome to be predicted. Univariate multilevel Poisson models were fitted to test each of the independent variables (clinical features) as predictors of short-term caries progression. The multimodel inference was made based on the Akaike Information Criteria and C statistic. Afterwards, plausible interactions among some of the variables were tested in the models to evaluate the benefit of combining these variables when assessing caries lesions. RESULTS: 205 children (750 surfaces) presented no frank cavitations at the baseline. After one year, 147 children were reassessed (70%). Finally, 128 children (733 surfaces) presented complete baseline data and had included primary teeth to be reassessed. Approximately 9% of the reassessed surfaces showed caries progression. Among the univariate models created with each one of these variables, the model containing the surface integrity as a predictor had the lowest AIC (364.5). Univariate predictive models tended to present better goodness-of-fit (AICs < 388) and discrimination (C:0.959-0.966) than those combining parameters (AIC:365-393, C:0.958-0.961). When only non-cavitated surfaces were considered, roughness compounded the model that better predicted the lesions' progression (AIC = 217.7, C:0.91). CONCLUSIONS: Univariate model fitted considering the presence of cavitation show the best predictive goodness-of-fit and discrimination. For non-cavitated lesions, the simplest way to predict those lesions that tend to progress is by assessing enamel roughness. In general, the evaluation of other conjoint parameters seems unnecessary for all non-frankly cavitated lesions.


Asunto(s)
Susceptibilidad a Caries Dentarias , Caries Dental , Niño , Caries Dental/diagnóstico , Pruebas de Actividad de Caries Dental , Esmalte Dental , Humanos , Diente Primario
9.
Br Dent J ; 230(8): 523-527, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33893425

RESUMEN

White enamel lesions are a common presentation to the general dentist and aesthetic concerns are the most frequent presenting problem. Aetiology may be multifactorial and management of such lesions is heavily dependent on the cause. In the paediatric patient, differentiating white lesions caused by caries, fluorosis and genetic and developmental disorders is key to offering optimal long-term treatment outcomes. Early intervention allows for carefully planned management of less common disorders. Many of these disorders exist along a spectrum, and white lesions offer a useful clue to prompt intervention and referral to the relevant specialists. This article overviews common white lesions of the teeth and outlines the hierarchy of management options available.


Asunto(s)
Caries Dental , Fluorosis Dental , Niño , Caries Dental/etiología , Caries Dental/terapia , Susceptibilidad a Caries Dentarias , Esmalte Dental , Estética Dental , Humanos
10.
Oper Dent ; 46(1): 87-99, 2021 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-33882139

RESUMEN

CLINICAL RELEVANCE: Effective methods to control incipient caries lesions are needed. In this investigation, several methods provide encouraging results. SUMMARY: This study aimed to evaluate in situ the inhibition of incipient caries lesion progression using different treatment protocols and to evaluate the effectiveness of fluorescence-based methods (DIAGNOdent, DIAGNOdent pen, and VistaProof fluorescence camera [FC]) in monitoring this process. The research was conducted in four phases: (1) at baseline, (2) after a first cariogenic challenge, (3) after treatment modalities, and (4) after a second cariogenic challenge. Sixteen volunteers used intraoral acrylic palatal appliances, each containing six enamel blocks (n=96). The cariogenic challenge was performed using a 20% sucrose solution over a 14-day period. The appliances were removed eight times a day and, upon removal, two drops of the solution were placed onto each enamel block. The enamel blocks were randomly assigned to three treatment groups: fluoride varnish ([FV] Duraphat; n=32), resin infiltrant ([RI] Icon; n=32), and adhesive system ([AS] Scotchbond; n=32). At the end of each phase, the surface microhardness (SMH) was measured, and two trained examiners evaluated the specimens using fluorescence-based methods. In addition, integrated mineral loss (ΔΔZ; vol%.min x µm) and lesion depth (ΔLD; µm) were evaluated using transverse microradiography. A two-way analysis of variance and a Tukey post hoc test were calculated (α=5%). Significant differences in SMH were observed according to the treatment, phases, and interaction of factors (p<0.001). Treatment with FV resulted in significantly higher SMH values in phases 3 and 4 compared to RI and AS, with the last two treatments resulting in similar values (p>0.05). The ΔΔZ value was similar for FV and AS but significantly higher for RI (p=0.016). ΔLD was not significantly different among the groups (p=0.126). Significant differences in the measurement of fluorescence for each fluorescence-based method were observed between each phase of the study (p<0.05). It can be concluded that all treatments were effective in inhibiting the in situ progression of incipient lesions, although to different degrees, with minor mineral loss changes observed for the AS and FV. Besides, all fluorescence-based methods tested, except for that using the FC device, were effective in monitoring caries lesion progression.


Asunto(s)
Susceptibilidad a Caries Dentarias , Caries Dental , Cariostáticos , Caries Dental/diagnóstico , Caries Dental/terapia , Esmalte Dental , Fluorescencia , Humanos , Microrradiografía
11.
Oper Dent ; 46(1): E11-E20, 2021 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-33882141

RESUMEN

CLINICAL RELEVANCE: A prereacted, glass-ionomer filler fluoride-containing resin composite had lower remineralization potential than glass-ionomer cements but was able to inhibit enamel demineralization; thus, it may be an option for restoring dental surfaces for patients at high risk of caries. SUMMARY: Evidence is lacking on the use of surface prereacted glass-ionomer filler resin composites to inhibit demineralization and that simulate real clinical conditions. The present laboratory study evaluated the potential of such composites to prevent demineralization and quantified fluoride (F) and other ions released from restorative materials after a dynamic pH-cycling regimen applied to the tooth material interface in vitro. The pH-cycling regimen was assessed by measuring surface hardness (SH) along with energy dispersive X-ray spectroscopy (EDX). METHODS AND MATERIALS: Ninety blocks of bovine enamel were subjected to composition analysis with EDX, and were further categorized based on SH. The blocks were randomly divided into 6 treatment groups (n=15 each): F IX (Fuji IX Extra; GC Corporation); IZ (Ion Z, FGM); F II (Fuji II LC, GC Corporation); B II (Beautifil II, Shofu); F250 (Filtek Z250 XT, 3M ESPE); and NT (control, no treatment). The blocks were subjected to a dynamic pH-cycling regimen at 37°C for 7 days concurrently with daily alternations of immersion in demineralizing/remineralizing solutions. EDX was conducted and a final SH was determined at standard distances from the restorative materials (150, 300, and 400 µm). RESULTS: The EDX findings revealed a significant increase in F concentration and a decrease in Ca2+ in the enamel blocks of group B II after the pH-cycling regimen (p<0.05). SH values for groups F IX, IZ, and F II were greater than those for groups B II, F250, and NT at all distances from the materials. CONCLUSIONS: The results suggest that each of 3 restorative materials, F IX, IZ, and F II, partially inhibited enamel demineralization under a dynamic pH-cycling regimen.


Asunto(s)
Desmineralización Dental , Animales , Cariostáticos , Bovinos , Resinas Compuestas , Esmalte Dental , Materiales Dentales , Fluoruros , Cementos de Ionómero Vitreo/uso terapéutico , Humanos , Cementos de Resina , Desmineralización Dental/prevención & control
12.
Braz Dent J ; 32(1): 85-90, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33914007

RESUMEN

This study evaluated the chemical composition and microhardness of human enamel treated with an Enamel Matrix Derivative (EMD) solution, and the bond strength between composite resin and this enamel. Thirty human enamel samples were randomly divided into three groups: Untouched Enamel (UE), Demineralized Enamel (DE) and Demineralized Enamel Treated with EMD (ET). DE and ET groups were subjected to acid challenge and ET treated with EMD (EMD was directly applied over conditioned enamel and left for 15 min). Samples from each group (n=4) had chemical composition assessed through to attenuated total reflectance Fourier transform infrared (ATR-FTIR). Knoop microhardness of enamel samples from each group (n=10) was measured. For the microshear bond strength, the samples were etched for 30 s, and the adhesive was applied and cured for 10 s. Two matrixes were placed on the samples, filled with Filtek Z350 XT composite and cured for 20 s, each. The matrix was removed, and the microshear bond strength of each group (n=10) was tested. Data were subjected to Kruskal-Wallis test (for microhardness), to analysis of variance and to Tukey's test (for microshear bond strength); (α=0.05). FTIR results have shown phosphate (hydroxyapatite indicator) in 900-1200 cm-1 bands in the UE and ET groups, which were different from the DE group. Microhardness and microshear analyses recorded higher statistical values for the UE and ET groups than for DE. EMD application to demineralized enamel seems to have remineralized the enamel; thus, the microhardness and bond strength was similar between UE and ET groups.


Asunto(s)
Recubrimiento Dental Adhesivo , Resinas Compuestas , Cementos Dentales , Esmalte Dental , Dureza , Humanos , Ensayo de Materiales , Cementos de Resina , Resistencia al Corte
13.
J Dent Child (Chic) ; 88(1): 11-16, 2021 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-33875046

RESUMEN

Purpose: To assess the effects of a soft drink, a soybean-based apple juice and strawberry juice on the superficial and deep microhardness of primary tooth enamel.
Methods: Sixty primary teeth were divided according to the beverages and a control group (artificial saliva). Immersion cycles were carried out under agitation (five minutes three times a day over 60 days). Superficial microhardness measurements were taken after seven, 15, 30, 45, and 60 days. Teeth were cut for deep microhardness evaluation. Analysis of variance and Tukey's test (95 percent confidence interval) were used for data analysis. Teeth were scanned by electron microscopy for quantitative analysis.
Results: The soybean drink led to a significant decrease in the superficial microhardness ( P <0.05) at all tested times. The decrease for the strawberry juice was steeper than for the soybean drink and the soft drink significantly decreased the superficial microhardness at all times. The soybean drink recorded lower surface deep microhardness values while the juice presented similar results to the soybean drink at a depth of up to 200 µm. There was a gradual and statistically significant increase at a depth of up to 300 µm with the soft drink. Scanning electron microscopy evaluation showed that all beverages had gradual demineralization, being evident on the 60th day; the soft drink showed the greatest overall loss of enamel.
Conclusion: All beverages affected the microhardness of primary teeth enamel. The soft drink was the most harmful to enamel among the assessed beverages.


Asunto(s)
Esmalte Dental , Erosión de los Dientes , Bebidas , Bebidas Gaseosas , Dureza , Humanos , Erosión de los Dientes/inducido químicamente , Diente Primario
14.
J Dent Child (Chic) ; 88(1): 40-45, 2021 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-33875051

RESUMEN

Purpose: To assess developmental enamel defects (DED) and dental caries of preterm (PT) and/or low birth weight (LBW) children compared to full term (FT) and/or normal birth weight (NBW) infants, and to evaluate the association of DED with socioeconomic factors, gestational health, and postnatal factors.
Methods: This study included 84 two- to five-year-old children. The PT/LBW group included 42 children who received medical care at a university hospital, while FT/ NBW group included 42 subjects. Children were matched by sex and age (1:1 ratio). Descriptive statistics, bivariate analysis, and Poisson regression were used to analyse the data.
Results: Children in the PT/LBW group had a significantly higher number of teeth with DED than subjects in the FT/NBW group. No difference was observed between the groups regarding dental caries (P >0.05). Admission to the neonatal intensive care was significantly associated with DED unit (prevalence ratio = 0.21 [95 percent confidence interval = 0.1 to 0.5]).
Conclusion: PT/LBW children presented more DED than FT/NBW children. No differences were observed between the groups for dental caries. Admission to the neonatal intensive care unit was associated with DED.


Asunto(s)
Caries Dental , Niño , Preescolar , Caries Dental/epidemiología , Esmalte Dental , Humanos , Lactante , Recién Nacido de Bajo Peso , Recién Nacido , Prevalencia , Diente Primario
15.
Pediatr Dent ; 43(2): 95-101, 2021 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-33892832

RESUMEN

Purpose: The purpose of this study was to compare the remineralizing clinical efficacy of fluoride plus hydroxyapatite (Remin Pro®; RP) and fluoride plus casein phosphopeptide-amorphous calcium phosphate fluoride (Mi Paste Plus®; MPP) for the treatment of white spot lesions (WSLs) in primary tooth enamel. Methods: This study was a randomized double-blind clinical trial. It included patients with at least one primary maxillary anterior tooth with a WSL on the enamel surface. They were randomly assigned to receive either the twice-daily at-home topical application of RP or MPP or fluoride (NaF) paste (Colgate Total®; CT). The remineralization degree was quantified by the change in the number of units of fluorescence (UF) measured with laser fluorescence pen device (DIAGNOdent™) from the baseline and at days 10 and 21. Results: UF decreased significantly in all groups (P<0.001). Both RP and MPP resulted in significantly higher standardized mean difference (SMD) UF than CT (P<0.05); however, the difference between RP and MPP was not statistically significant (P>0.05). Conclusions: Topical application of Colgate Total®, Mi Paste Plus®, and Remin Pro® resulted in a remineralizing effect against white spot lesions on primary tooth enamel. Both MPP and RP were statistically superior to CT.


Asunto(s)
Caries Dental , Remineralización Dental , Cariostáticos/uso terapéutico , Caseínas , Caries Dental/tratamiento farmacológico , Esmalte Dental , Humanos , Diente Primario , Resultado del Tratamiento
16.
Gen Dent ; 69(3): 24-29, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33908874

RESUMEN

This study evaluated the failure load and the shear bond strength of 4 block materials indicated for computer-aided design/computer-aided manufacturing (CAD/CAM) of dental veneers: lithium disilicate, feldspathic ceramic, polymer-infiltrated ceramic, and nanohybrid composite. The tested hypothesis was that the material that combined an elastic modulus similar to that of enamel with the highest bond strength values would present the highest failure load. From prefabricated CAD/CAM blocks, disc-shaped specimens (6.0 × 0.7 mm; n = 10) and cylinders (2.4 × 2.5 mm; n = 10) were fabricated for load-to-failure and shear bond strength tests, respectively. Materials were adhesively bonded to flattened bovine enamel surfaces, stored in distilled water at 37°C for 90 days, and subjected to thermocycling (2000 cycles of 5°C to 55°C). Discs of restorative material were bonded to enamel and subjected to an increasing load that was applied perpendicular to the bonding interface until catastrophic failure occurred. A chisel was used to apply an increasing load parallel to the adhesive interface between the enamel and a cylinder of restorative material to measure shear bond strength. Data were subjected to a Weibull analysis and 1-way analysis of variance followed by a Tukey post hoc test (α = 0.05). The type of restorative material significantly affected the (mean [SD]) failure load when bonded to enamel (P = 0.006): polymer-infiltrated ceramic (1167.9 [310.2] N) = feldspathic ceramic (1115.0 [382.0] N) = nanohybrid composite (1067.3 [251.0] N) > lithium disilicate (786.2 [304.5] N). The type of restorative material also significantly affected the (mean [SD]) bond strength to enamel (P < 0.001): lithium disilicate (32.81 [11.19] MPa) = polymer-infiltrated ceramic (27.04 [7.65] MPa) > feldspathic ceramic (21.11 [9.16] MPa) > nanohybrid composite (9.08 [3.66] MPa). The polymer-infiltrated ceramic presented the best performance when bonded to enamel.


Asunto(s)
Recubrimiento Dental Adhesivo , Cementos de Resina , Animales , Bovinos , Cerámica , Esmalte Dental , Porcelana Dental , Análisis del Estrés Dental , Humanos , Ensayo de Materiales , Resistencia al Corte , Propiedades de Superficie
17.
Braz Oral Res ; 35: e038, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33909860

RESUMEN

A randomized controlled parallel clinical trial was conducted to evaluate the efficacy of the association of 1.23% topical professional acidulated phosphate fluoride (APF) gel with oral hygiene and dietary instructions on the arrest of active non-cavitated lesions in permanent, mixed, and temporary dentition in children between 3 and 12 years of age. Ninety-eight caries-active children were randomly divided into two groups: a fluoride gel group (n = 49) and a non-fluoridated gel group (n = 49). Each group received up to eight weekly applications of gel, weekly professional toothbrushing with oral hygiene instructions and dietary counselling. Caries lesions were assessed qualitatively through visual-tactile criteria performed in three stages: initial, intermediate, and final. Regression models were applied to identify risk indicators for caries control. Between-group comparison regarding the time taken to arrest the lesions was performed using Chi-squared and Fisher's exact tests. Seventeen children did not receive the allocated intervention, and one was lost to follow-up (n = 80). There was no difference between the control and placebo groups regarding the time to the arrest of the lesion (p >.05). The treatments showed similar results without significant statistical difference (p = 0.33; 95%CI: 0.32-1.48). No adverse effects were observed. It can be concluded that no additional effect of the association of 1.23% APF gel with oral hygiene using fluoride dentifrice and dietary instructions on the arrest of active non-cavitated lesions could be established. We can also confirm the importance of toothbrushing frequency and, consequently, the visible plaque reduction in the control of caries activity. RBR-37V5S3.


Asunto(s)
Fluoruro de Fosfato Acidulado , Caries Dental , Cariostáticos/uso terapéutico , Niño , Caries Dental/prevención & control , Esmalte Dental , Humanos , Diente Primario , Cepillado Dental
18.
BMC Oral Health ; 21(1): 199, 2021 04 19.
Artículo en Inglés | MEDLINE | ID: mdl-33874922

RESUMEN

BACKGROUND: The aim of the study was to compare the amount of interproximal enamel reduction (IPR) provided on ClinCheck software with the amount of IPR carried out by the orthodontist during treatment with clear aligners. METHODS: 30 subjects (14 males, 16 females; mean age of 24.53 ± 13.41 years) randomly recruited from the Invisalign account of the Department of Orthodontics at the University of Rome "Tor Vergata" from November 2018 to October 2019, were collected according to the following inclusion criteria: mild to moderate dento-alveolar discrepancy (1.5-6.5 mm); Class I canine and molar relationship; full permanent dentition (excluding third molars); both arches treated only using Comprehensive Package by Invisalign system; treatment plan including IPR. Pre- (T0) and post-treatment (T1) digital models (.stl files), created from an iTero scan, were collected from all selected patients. The OrthoCAD digital software was used to measure tooth mesiodistal width in upper and lower arches before (T0) and at the end of treatment (T1) before any refinement. The widest mesio-distal diameter was measured for each tooth excluding molars by "Diagnostic" OrthoCAD tool. The total amount of IPR performed during treatment was obtained comparing the sum of mesio-distal widths of all measured teeth at T0 and T1. Significant T1-T0 differences were tested with dependent sample t-test (P < 0.05). RESULTS: In the upper arch, IPR was digitally planned on average for 0.62 mm while in the lower arch was on average for 1.92 mm. As for the amount of enamel actually removed after IPR performing, it was on average 0.62 mm in the maxillary arch. In the mandibular arch, the mean of IPR carried out was 1.93 mm. The difference between planned IPR and performed IPR is described: this difference was on average 0.00 mm in the upper arch and 0.01 in the lower arch. CONCLUSIONS: The amount of enamel removed in vivo corresponded with the amount of IPR planned by the Orthodontist using ClinCheck software.


Asunto(s)
Aparatos Ortodóncicos Removibles , Adolescente , Adulto , Niño , Arco Dental , Esmalte Dental , Dentición Permanente , Femenino , Humanos , Masculino , Maxilar , Diente Molar , Adulto Joven
19.
Biomed Res Int ; 2021: 6634595, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33816623

RESUMEN

Background: Orthodontic patients are at high risk to develop caries. This study is introducing a clinical method detecting interfacial defects between ceramic brackets and enamel utilizing optical coherent tomography in addition to using the nanoleakage expression in vitro test. Methods: Transbond XT primer and moisture insensitive primer (MIP) were bonded to 75 human premolar enamel surfaces and divided into (XTD), (MIPD), and (MIPW) groups. The (XTD) and (MIPD) groups had ceramic brackets bonded to dry enamel surfaces using TransBond and moisture insensitive primers, respectively, while the (MIPW) samples were bonded to moist enamel using moisture insensitive primer. All specimens were examined under crosspolarization optical coherence tomography. Debonding forces of the brackets to 45 teeth (15 teeth/group). 30 bonded specimens (15 specimens/group) were cross-sectioned to detect the nanoleakage expression using scanning electron microscope equipped with energy-dispersive spectroscopy (SEM/EDS). The degree of conversion of the specimens in the experimental groups was tested using attenuated total reflectance Fourier transform infrared spectroscopy (FTIR/ATR). Results: Optical coherence tomography detected the interfacial defects between the ceramic brackets and tooth structure. One way ANOVA showed that (XTD) and (MIPD) groups recorded significantly higher bond strength values and less nanoleakage expression when compared to MIPW (p > 0.05). Conclusions: Optical coherence tomography can be utilized to detect interfacial adhesive-tooth defects. Dry enamel surfaces improve the quality of the enamel/primer interface (200 words).


Asunto(s)
Diente Premolar , Esmalte Dental , Soportes Ortodóncicos , Cementos de Resina/química , Humanos , Resistencia al Corte , Espectrometría por Rayos X
20.
Biomed Res Int ; 2021: 5544196, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33834066

RESUMEN

Objectives: The aim of this study was to evaluate the protective effect of using four different fluoride bioactive enamel sealers against an acidic erosion challenge. Materials and Methods: A sample of 50 freshly extracted sound upper premolars had their buccal surface bonded to 50 orthodontic brackets using Transbond PLUS color change adhesive; the first four groups had four compositions of fluoride bioactive glasses based on 37 mol% SiO2, 43.9-53.9 mol% CaO, 6.1 mol% P2O5 and CaF2, and 0-10 mol% of Na2O applied to their surfaces and the fifth group served as control (which was not treated by any bioactive sealer). All specimens were challenged by 1% citric acid for 18 minutes which was stirred by a magnetic stirrer. The enamel surfaces next to the orthodontic brackets were examined by SEM. The Wilcoxon signed-rank test was used to compare the area covered by the fluoride bioactive pastes before/after erosion (p < 0.05). Samples from the layer formed on top of the examined teeth were tested before/after erosion to be examined by the attenuated total reflectance Fourier-transform infrared spectroscopy (FTIR/ATR). Results: The FTIR/ATR test showed that fluoride bioactive pastes' applications resulted in the formation of a hydroxyapatite-rich layer; the SEM analysis showed that the aforementioned layer significantly resisted erosion challenge when compared to the control group (p < 0.05). Conclusions: Fluoride bioactive pastes can efficiently protect the enamel surfaces next to orthodontic brackets from acidic erosion challenges.


Asunto(s)
Esmalte Dental/efectos de los fármacos , Fluoruros/farmacología , Vidrio/química , Soportes Ortodóncicos , Sustancias Protectoras/farmacología , Simulación por Computador , Cristalización , Esmalte Dental/ultraestructura , Selladores de Fosas y Fisuras , Resinas Sintéticas/química , Espectroscopía Infrarroja por Transformada de Fourier , Temperatura
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