The color stability of resin cements is essential for aesthetic restorations. Aim: To evaluate the influence of shade and aging time on the color stability of two light-cured and two dual-cured resin cements. Methods: The CIE-Lab color parameters (n=6) were measured immediately after sample preparation and at 7, 30 and 90 days of aging in distilled water. The color difference (∆E) was calculated and then analyzed by three-way ANOVA for repeated measures and Tukey's HSD test (α=0.05). Results: ∆E was higher for transparent resin colors, followed by dark and light colors. The mean values of ∆E were lower for both light-cured resin cements compared to the dual-cured cements. As the aging time increased, ∆E values increased. Conclusions: The light-cured resin cements showed greater color stability. The lighter shades of luting were more likely to display a greater color change.

The influence of curing mode and shade of resin cements on the color stability of minimum-thickness ceramic veneers after a three-year storage time in distilled water was evaluated in this study. Ninety-six 0.5-mm-thick feldspathic ceramic veneers (Mark II) were luted onto resin composite substrates (Filtek Z350 XT, shade A2E) with two light-cured (NX3 Light-cure and AllCem Veneer) and dual-cured resin cements (NX3 dual-cure and AllCem) in various shades. The specimens were stored in distilled water at 37°C. Color measurements were performed with a spectrophotometer at the following times: 1h and 24h; 7, 30, and 180 days; and 1, 2, and 3 years. Data for color difference (ΔE ab ) light-cured and dual-cured resin cements were analyzed by two-way ANOVA with repeated measures and Tukey’s test (α = 0.05). For the light-cured cements, the ΔE ab values were as follows: NX3-Yellow (2.37±1.35) = ACV-A1 (2.40±1.21) = ACV-Trans (2.52±1.46) = ACV-E-Bleach M (2.56±1.42) = NX3-White (2.69±1.49) = NX3-Clear (2.98±1.68). The lowest ΔE values were found for 1 h (0.61±0.36) a , followed by 24 h (1.15±0.55) b and 30 days (2.48±1.11) c . One year, 180 days, and 2 and 3 years presented higher ΔE ab values (3.34±0.94, 3.52±1.04, 3.52±0.95 and 3.55±1.14, respectively) d . For the dual-cured cements, the ΔE ab values varied as follows: NX3-Clear (2.32±1.24) a = NX3-Yellow (2.37±1.32) a = NX3-White (2.76±1.43) a < AC-Trans (3.77±1.91) b = AC-A3 (4.13±2.11) b < AC-A1 (5.38±2.92) c . Considering time, the lowest ΔE ab values were found for 1 h (0.48±0.25) a , followed by 24 h (2.13 ±0.83) b , 30 days (3.54±1.31) c , and 180 days (3,70±1.73) c . The follow-up times of 1 (4.43±2.15) d , 2 (5.02±1.74) e , and 3 years (4.90±2.12) e presented higher ΔE ab values. This study demonstrated that light-cured resin cements were less susceptible to color change than dual-cured cements. After 2 years of follow-up, all cements presented ΔE ab values above the acceptability threshold.

No abstract

A busca por um sorriso harmônico é o desejo da maior parte da população. A estética encontra-se atualmente frequente e comum na prática clínica diária. As principais alterações são forma dental, tamanho, cor e posição. Com o desenvolvimento da odontologia adesiva e dos materiais estéticos, a restauração direta com compósito, através da mínima invasão dos tecidos dentários hígidos vem sendo utilizada. O objetivo desse trabalho é apresentar um caso clínico em que se optou, como plano de tratamento, pelo clareamento dental de consultório, seguido da confecção de encerramento para planejamento do caso, com mock-up motivacional e fechamento de diastemas com restaurações em resina composta direta, seguindo a proporção áurea. A realização do clareamento dental possibilitou a homogeneização de cor do esmalte dental e das manchas de fluorose. O fechamento de diastemas utilizando o enceramento diagnóstico e a grade de Levin facilitou a reprodução do planejamento durante a execução das restaurações. As restaurações diretas são uma alternativa viável para reanatomização dental, pois torna o tratamento de resultados rápidos, de baixo custo e de estética satisfatória.

Introduction. For the maintenance of the aseptic chain created during the treatment the coronal sealing becomes paramount. Aim. Evaluating the antibacterial effect and the physical-mechanical properties of a temporary restorative material containing different antibacterial agents. Material and Methods. Two antibacterial agents (triclosan and chloramine T) were manually added to a temporary restorative material used as base (Coltosol). The antibacterial action of the material was analyzed using the agar diffusion method, in pure cultures of Escherichia coli (ATCC BAA-2336) and Staphylococcus aureus (ATCC 11632) and mixed culture of saliva collection. The microleakage rate was analyzed using bovine teeth, previously restored with the materials, and submitted to thermocycling, in a solution of 0.5% methylene blue, for a period of 24 hours. The physical and mechanical properties of the materials analyzed were setting time, water sorption, solubility, and compression strength. Results. No marginal leakage was observed for all groups. There was no statistical significant difference in antimicrobial activity, setting time, water sorption, solubility, and compression strength among the materials. Conclusion. The addition of antibacterial agents on a temporary restorative material did not optimize the antibacterial ability of the material and also did not change its physical-mechanical properties.

Gingival recession is an oral health problem that affects a large part of the population. Several treatments are suggested in the current literature; among them is the use of buccal fat pad grafting. The objective of this case report is to describe the treatment of a Miller Class I gingival recession using a nonpedicled buccal fat pad graft immediately after performing the surgery for buccal fat pad removal (bichectomy technique). First, bilateral surgical removal of the buccal fat pad was performed with the main objective of eliminating oral mucosa biting. The recipient site was prepared to receive a portion of the fat pad that was cut and macerated in a size that was sufficient to cover the recession. The patient was followed up at 15, 30, 60, and 365 days postsurgery, and the results showed an elimination of the oral mucosa biting and complete coverage of the gingival recession. It was concluded that the nonpedicled buccal fat pad graft is another option for the treatment of Miller Class I recessions.

The demand of patients for an aesthetic and harmonious smile has been growing, which generates the need for knowledge of various techniques and materials to obtain satisfactory results. Thus, ceramic restorations are increasingly present in dentistry due to their excellent optical and mechanical properties. Thus, the objective of this work was to perform the functional and aesthetic restoration of the smile through ceramic restorations in the anterior teeth. Patient L.T., male, 47 years old, sought the dental clinic of the Universidade Paranaense, complaining about the aesthetics of his smile. On clinical examination, asymmetry was observed between the gingival zeniths of the elements, as well as short clinical crowns and extensive and unsatisfactory composite resin restorations. In the radiographic examination, it was observed the presence of satisfactory molten metal core in the element 21, and the need for endodontic treatment in the elements 12, 11 and 22, for placement of intraradicular retainer, being selected the Fiberglass Pin (FP). Given this case, the procedure of gingivectomy with osteotomy was also proposed. Total metal-free crowns were made of lithium disilicate for elements 13, 12 and 22 and zirconia for elements 11 and 21. The ceramic laminate on tooth 23 was also made of lithium disilicate. The final result obtained was approved by the patient and the professionals involved.