Scientific studies

ITENA Clinical Laboratory provides scientific studies conducted by independent laboratory certifying the performance and quality of our products.

Iperbond Ultra is a self‐etching adhesive system (Self‐Etch Mode) requiring no preliminary etching and rinsing stage: practitioners greatly appreciate these systems’ simplicity and rapidity in use compared with traditional systems that demand a preliminary etching or “E&R” (Etching and Rinsing) stage.

Nevertheless an application of phosphoric acid, even if not strictly necessary, could strengthen the adhesion of this Self‐Etch Mode to dental tissues. The aim of this first part was to use a scanning electron microscope (SEM), at various magnifications, to observe the resin‐composite/enamel and resin‐composite/dentine interfaces of composite blocks cemented using Iperbond Ultra, both with and without preliminary etching

 

This study was undertaken at the request of the ITENA CLINICAL company to evaluate the basic properties of the Reflectys composite.

Three experimental approaches were implemented:

  1. Evaluation of its structure by SEM (Scanning Electron Microscopy)
  2. Evaluation of its polishability with a well‐defined SEM instrument sequence
  3. Evaluation of its mechanical properties
    > Flexion resistance
    > Micro‐hardness

It is not clear whether newly introduced cordless displacement systems are better able to manage gingiva than conventional systems. The purpose of this in vivo study was to evaluate the gingival management ability of 4 different displacement methods with a standardized subgingival preparation finish line.

Restoring an endodontic tooth is vitally important for the functional balance of the stomatognathic system. Consequently the most appropriate materials must be chosen and the most precise techniques used in order to guarantee a long-lasting result. Although, in the literature, authors are not in total agreement regarding tooth restoration, they do recognise the need to spare dental tissue in endodontic and posterior restoration procedures so as to preserve as much dental tissue as possible. With this in mind, and using current adhesive techniques, there would be no point in using an intraradicular post to stabilise the restoration. Choosing the type of restoration and deciding whether or not to use an intraradicular post will depend, in each case, on the quantity of remanent tissue and the part's location in the dental arch

 

Forty recently-extracted human molars, free from decay, were included in the study. After extraction and root cleaning, the teeth were stored in a 1% chloramine solution for a period not exceeding 3 months. The teeth were randomly divided into groups as follows: ten teeth were treated with the light-curing resin Helioseal® (Ivoclar Vivadent) (Hel), 10 with the lightcuring resin Clin Pro (3M-ESPE) (Cpro), 10 with the light-curing resin Embrace WetBondTM (Emb) (Pulpdent, distributed in France by GABA) and 10 with the new self-adhesive experimental material (Exp) (Itena) The occlusal surfaces of the teeth were brushed with a low-speed rotating brush. Teeth from the Hel, Cpro and Emb groups were etched with 35% phosphoric acid gel for 20 seconds then rinsed for 10 seconds. All materials were used according to the manufacturer’s instructions

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These were to verify the mechanical performance of this restoration material designed for

use in pulpless teeth, compared with competing commercial materials. The flexion test is a good first "screening" test because the stress exerted on the samples includes both tension and compression forces. Dentocore is a so-called "dual" material. It can polymerise by blue-light irradiation (photopolymerisation), but it can also polymerise without light through a purely chemical reaction (chemo-polymerisation). Most composites used for coronal-radicular restoration are of the same type, which is clinically important for materials to be injected en masse (remember that purely photo-polymerisable composites have to be applied layer by layer and each layer must not exceed 2 mm thick, which takes a long time) and to set in zones which are inaccessible to photons (root canal).

 

 

For the study, 60 third human molars free of cavities and restoration were used. They were divided by random drawing into 6 groups. The teeth were preserved in a 1% Chloramine T solution at 4°C for less than three months after extraction. The samples were coated in an acrylic resin (Plexcil, Escil, Chassieu, France) using cylindrical moulds. The coated samples were then polished perpendicularly to their primary axis using SiC discs with decreasing grit (#80 to #800) under constant irrigation.