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Clinical Cases

See how Coltene products helped many professionals in important dental operations, bringing satisfaction to their customers. Has a case to tell us too? Send it to us by clicking the link above.

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UM NOVO CONCEITO DE INSTRUMENTAÇÃO – SISTEMA HYFLEX® CM
Tulio Lorenzo Olano Dextre
Celso Kenji Nishiyama

Para o sucesso do tratamento endodôntico, é essencial a correta limpeza e modelagem do canal radicular, obtendo forma cônica semelhante à sua forma original, possibilitando as condições para que possa ser hermeticamente obturado. A etapa que sofreu grandes transformações nos últimos anos foi o preparo radicular com sistemas mecanizados, sendo um gradual “substituto” do preparo manual. Uma das grandes inovações em Endodontia foi a introdução do níquel-titânio (NiTi) para fabricação de instrumentos endodônticos devido à super elasticidade, que proporciona maior flexibilidade e resistência à fadiga cíclica, permitindo às limas de seguirem efetivamente o caminho original do canal radicular. Apesar das excelentes propriedades mecânicas da liga de NiTi, a separação de instrumentos continua sendo a preocupação principal. Entre os novos sistemas existentes, desde a introdução do NiTi, o sistema HyFlex® CM (Coltène – Whaledent), que é fabricado com um único processo térmico que fornece maior flexibilidade sem efeito de rebote, proporcionando melhor centralização no canal, maior resistência à fadiga cíclica e propriedades regenerativas que fazem que retorne a sua posição original. O objetivo deste trabalho é apresentar o sistema HyFlex® CM em diferentes condições anatômicas mostrando a sequência clínica e suas características através da apresentação de 3 casos clínicos.

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Speedex: Do you really know the condensation silicone that you are using?
Coltene Brasil

Therefore, Speedex is the condensation silicone with greater tear strength in the market, superior to all other condensation silicones and to several addition silicones, followed by Perfil (second place within the condensation silicones), also superior to several addition silicones – as shown in the chart.

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Shear bond strenght of adhesive systems to enamel and dentin
Patrícia Aleixo dos Santos
Patrícia Petromilli Nordi Sasso Garcia
Regina Guenka Palma

Objectives: The purpose of the this study was to evaluate the influence of thermocycling on shear bond strength on bovine enamel and dentin surfaces of different adhesive systems. Methods: Thirty sound bovine incisors were sectioned in mesiodistal and inciso-cervical direction obtaining 60 incisal surfaces (enamel) and 60 cervical surfaces (dentin). Specimens were randomly assigned to 3 groups of equal size (n=40), according to the adhesive system used: I—Single Bond; II—Prime & Bond NT/NRC; III—One Coat Bond. After 24-h storage in distilled water at 37oC, each main group was divided into two subgroups: Aspecimens tested after 24 h storage in distilled water at 37◦C; B – specimens submitted to thermocycling (500 cycles). Shear bond strength tests were performed. Data were submitted to ANOVA and Tukey test. Results: Means (MPa) of different groups were: I—AE-16.96, AD-17.46; BE-21.60, BD-12.79; II—AE-17.20, AD-11.93; BE-20.67, BD-13.94; III—AE-25.66, AD-17.53; BE-24.20, BD-19.38. Significance: Thermocycling did not influence significantly the shear bond strength of the tested adhesive systems; enamel was the dental substrate that showed larger adhesive strength; One Coat Bond system showed the best adhesive strength averages regardless of substrate or thermocycling. C  2005 Springer Science + Business Media, Inc.

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Influence of solvents and composition of etch-and-rinse and self-etch adhesive systems on the nanoleakage within the hybrid layer
João Cardoso Ferreira
Patrícia Teixeira Pires
Alvaro Ferreira Azevedo
Sofia Arantes Oliveira
Paulo Ribeiro Melo
Mario Jorge Silva

Two-step self-etch adhesive system (AdheSE(®)) might contribute for lower nanoleakage deposition and thus better performance in dentin adhesion. Clinical significance: The two-step self-etch adhesive system showed the lowest nanoleakage deposition compared with the other adhesive systems evaluated, which seems to indicate a better behavior when a restoration is performed in dentin and possibly can lead to a durable adhesion along time.

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One year clinical evaluation of an ethanol-based and a solvent-free dentin adhesive
Aw TC
Lepe X
Johnson GH
Mancl L

RESULTS:
The retention rates at 12 months were 98% for the SM adhesive, 91% for the SB adhesive, and 93% for the OCB adhesive. The differences in retention rates were not statistically significant, with 94% restorations retained overall. Measures of marginal integrity, marginal discoloration and sensitivity also had no statistically significant differences between the three adhesives. Overall, for the restorations still retained after 12 months, 80% had non/slightly detectable margins, 80% had no marginal discoloration and 90% had none/mild sensitivity. All three adhesives performed comparably with excellent outcomes after a 12-month period, with no significant differences between the water-based, ethanol-based and solvent-free adhesives, nor between the one-and two-bottle systems. Retention rate was high, air sensitivity was markedly reduced, and marginal integrity was good. Although superficial marginal discoloration was notable, no deep staining was evident. Certain lesion, tooth and patient characteristics may predispose restorations to retention failure.

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Understanding the simplified dentin adhesives with total etching
Prof.Dr. Carlos Francci

From material view, the starting point for study of the current restorative materials is the correct use of the adhesive systems, condition of fundamental importance for the restorations can remain adhered to dental tissues satisfactorily throughout time. These systems are composed by different components (acid, primer and the adhesive itself) that interact each one of the dental hard tissues (enamel and dentin) involved in the cavities that require the application of the restorative therapeutics, in accordance with their histomorphological features.

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Direct facet in nanohybrid composite resin: Direct alternative for aesthetics modification of the smile using the resin NT Premium
Prof. Dr. Paulo Vinícius Soares

It was decided by application of this rehabilitative technique after the attempt of external bleaching performed with hydrogen peroxide 35% applied in accordance with the manufacturer protocol. The details of the technique and products used are described in the Figures 01 to 29. It can be concluded the technique effectiveness and quality, also as the patient satisfaction.

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Clinical case NT Premium
Fernanda Signorelli Calazans
Saul Antunes Neto
Prof. Dr. Mauro Sayão de Miranda

The clinical case to be described uses the resin NT Premium (Vigodent/Coltene) for restoration of the smile of a teenager of 15 years old, patient of the research clinic of the Master’s and Doctorate in Operative course – FO – UERJ.

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Study of the radio-opacity of base and liner dental materials using a digital radiography system
KM Lachowski
SB Botta
CA Lascala
AB Matos
MAP Sobral

This study investigated the radio-opacity of commercially available glass ionomer cements (GICs), flowable resin composites (FRCs) and calcium hydroxide cements (CHCs) and compared this with the radio-opacity of enamel, dentine and aluminium stepwedge. 16 GICs, 8 FRCs and 4 CHCs were analysed.

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Completely dry with highly elastic, powder-free Elasti-Dam
Med. dent. Urs Hiltebrand

With 22 year old female patient is look- ing for a long-lasting functional and aesthetic solution for composite fillings of her upper right molars (teeth 16 and 17) that have become insufficient.

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