Catálogo de publicaciones - revistas

<jats:title>Abstract</jats:title><jats:sec><jats:title>Purpose</jats:title><jats:p>This study aimed to quantify the penetration of hydrogen peroxide (HP) inside the pulp cavity and color change with two different concentrations of HP to at‐home bleaching associated or not with enamel microabrasion (MA).</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Forty healthy premolars were randomly divided in four groups (<jats:italic>n</jats:italic> = 10): only HP4%, MA + HP4%, only HP10%, MA + HP10%. The concentration (μg/ml) of HP was assessed using UV–Vis spectrophotometry. The color change (Δ<jats:italic>E</jats:italic><jats:sub>ab</jats:sub>, Δ<jats:italic>E</jats:italic><jats:sub>00</jats:sub> and WI<jats:sub>D</jats:sub>) was evaluated before and one‐week after bleaching. Data were evaluated for a two‐way ANOVA and the Tukey's test (<jats:italic>α</jats:italic> = 0.05).</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>The application of MA increased the amounts of HP inside the pulp chamber when compared to without MA, as well as PH10% when compared to PH4% (<jats:italic>p</jats:italic> &lt; 0.0001). PH10% showed higher WI<jats:sub>D</jats:sub> when compared to PH4%. No significant difference was observed when Δ<jats:italic>E</jats:italic><jats:sub>ab</jats:sub>, and Δ<jats:italic>E</jats:italic><jats:sub>00</jats:sub> were used.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>The enamel MA before at‐home bleaching promotes greater penetration of HP, although this procedure did not significantly affect the color change.</jats:p></jats:sec><jats:sec><jats:title>Clinical Significance</jats:title><jats:p>Since greater penetration of HP into the pulp chamber was detected when home bleaching was applied immediately after MA, the clinician should not apply home bleaching gels in the same session when MA was performed.</jats:p></jats:sec>

<jats:title>Abstract</jats:title><jats:sec><jats:title>Objective</jats:title><jats:p>This study was aimed at comparing the bleaching efficacy and bleaching sensitivity (BS) of two higher‐concentration in‐office bleaching gels (37% carbamide peroxide [CP] and 38% hydrogen peroxide [HP]) applied under two conditions: alone or in association with sonic activation.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Fifty‐six volunteers were randomly assigned in the split‐mouth design into the following groups: CP, CP with sonic activation (CPS), HP, and HP with sonic activation (HPS). Two in‐office bleaching sessions were performed. Color was evaluated using Vita Classical, Vita Bleachedguide, and digital spectrophotometer at baseline and at 30 days post‐bleaching. Absolute risk and intensity of BS were recorded using two pain scales. All data were evaluated statistically (color changes [<jats:italic>t</jats:italic> test], BS [Chi‐square and McNemar test], and BS intensity [VAS; <jats:italic>t</jats:italic> test; NRS; Wilcoxon; α = 0.05]).</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Significant and higher whitening was observed for HP when compared with CP (<jats:italic>p</jats:italic> &lt; 0.04). However, higher BS intensity was observed in the former (<jats:italic>p</jats:italic> &lt; 0.001). No significant difference was observed in whitening effect or BS when the HP or CP bleaching gels were agitated (sonic application) compared with when they were not (<jats:italic>p</jats:italic> &gt; 0.05).</jats:p></jats:sec><jats:sec><jats:title>Conclusion</jats:title><jats:p>The 37% CP gel demonstrated lower bleaching efficacy and lower BS compared with the 38% HP bleaching gel. The whitening effect was not influenced by the use of sonic activation.</jats:p></jats:sec><jats:sec><jats:title>Clinical significance</jats:title><jats:p>The use of 37% CP gel did not achieve the same whitening effect when compared to 38% HP gel used for in‐office bleaching. The use of sonic activation offers no benefit for in‐office bleaching.</jats:p></jats:sec>

<jats:title>Abstract</jats:title><jats:sec><jats:title>Objective</jats:title><jats:p>This study aims to evaluate and compare the film thickness obtained with a resin cement and two composite resins, preheated and/or ultrasonically vibrated, as luting agents.</jats:p></jats:sec><jats:sec><jats:title>Materials and methods</jats:title><jats:p>One hundred and twenty‐six (126) pairs of resin discs were randomly assigned to six experimental groups (<jats:italic>n</jats:italic> = 21) according to luting agent (Variolink Esthetic LC, IPS Empress Direct or Estelite Omega) and cementation technique (preheating at 68°C and/or ultrasonic vibration). Specimens were luted by applying a controlled force. Following sectioning and film thickness measurement through field emission gun scanning electron microscopy, statistical analysis was carried out considering a 5% significance level.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Statistically significant lower film thickness was observed in Variolink Esthetic LC group when compared to all composite resin groups (<jats:italic>p</jats:italic> &lt; 0.001), except IPS Empress Direct preheated and ultrasonically vibrated group (<jats:italic>p</jats:italic> = 0.073). IPS Empress Direct with ultrasonic vibration yielded statistically lower film thickness values than Estelite Omega groups, regardless of luting technique (<jats:italic>p</jats:italic> &lt; 0.05). Ultrasonically vibrated Estelite Omega groups showed statistically lower film thickness values than solely preheated groups (<jats:italic>p</jats:italic> &lt; 0.05).</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>Both Variolink Esthetic LC and IPS Empress Direct preheated and ultrasonically vibrated provided the lowest film thickness. The addition of ultrasonic vibration during cementation proved to be effective in reducing film thickness of both tested composite resins.</jats:p></jats:sec><jats:sec><jats:title>Clinical significance</jats:title><jats:p>The cementation technique will have variable results depending on the luting material. Adhesive cementation protocols with composite resins should mainly consider ultrasonic vibration, but also preheating, as strategies for reducing film thickness. The tested resin cement, alongside with IPS Empress Direct composite resin preheated and ultrasonically vibrated, provided the lowest film thickness among the tested materials and techniques.</jats:p></jats:sec>

<jats:title>Abstract</jats:title><jats:sec><jats:title>Objective</jats:title><jats:p>This article will explain and demonstrate the application of analog smile design techniques and concepts as a precursor for digital smile design implementation. The application of these techniques will be described with two case presentations that will demonstrate the incorporation of these analog methods into digital smile design programs.</jats:p></jats:sec><jats:sec><jats:title>Clinical Considerations</jats:title><jats:p>Digital smile design workflows can be more efficient and require less chair time but must be based on an understanding and application of basic smile design principles to apply the digital techniques successfully.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>The application of basic smile design techniques to digital workflows resulted in excellent clinical outcomes for both a localized treatment plan and a full mouth restorative rehabilitation.</jats:p></jats:sec><jats:sec><jats:title>Clinical Significance</jats:title><jats:p>Digital smile design is quickly being adopted into dental practices. However, the digital design must be created by the clinician and be based on a thorough understanding of basic esthetic and restorative principles to achieve predictable successful clinical outcomes.</jats:p></jats:sec>

<jats:title>Abstract</jats:title><jats:sec><jats:title>Objective</jats:title><jats:p>This article describes the use of flowable injectable composite resins to facilitate transitional treatment of a complex complete mouth rehabilitation.</jats:p></jats:sec><jats:sec><jats:title>Clinical Considerations</jats:title><jats:p>Some patients require urgent and complex complete mouth rehabilitations that are time and cost intensive. Financial considerations can prevent some patients from pursuing treatment. This can result in the oral conditions worsening over time and compromising the long‐term prognosis of the teeth.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>Injectable composite resins can be used as a transitional bonding material for complex cases using an injection molding technique utilizing clear indices obtained from a diagnostic waxing. This allows for a full mouth rehabilitation to be performed in a single appointment, producing instant results.</jats:p></jats:sec><jats:sec><jats:title>Clinical Significance</jats:title><jats:p>Transitioning with injectable composite as demonstrated in this case will immediately stabilize an otherwise deteriorating situation in a cost‐effective way and allows patients to address the realities of financial or time constraints when transitioning to more durable porcelain restorations over a period of years.</jats:p></jats:sec>