Clinical Performances of 3-different Tooth-colored Restorative Materials in Class-II Cavities


Hacettepe University


Active, not recruiting




Device: Equia Forte HT ( GC, Tokyo, Japan)
Device: Cention N (Ivoclar Vivadent, Schaan, Liechtenstein)
Device: Gradia Direct Posterior ( GC, Tokyo, Japan)

Study type


Funder types




Details and patient eligibility


The goal of this clinical trial comparatively investigate the clinical performances of 3 different tooth-colored restorative materials in the treatment of Class II cavities after 6 months and one year.

Full description

High plaque accumulation at the proximal surfaces of posterior teeth can lead to the development of caries and the necessity of dental treatments.The complexity of application methods for resin composites could influence the risk of secondary caries due to bacterial microleakage.In modern dentistry, simplified, esthetic, and satisfactory restoration of tooth decay has led to innovative material developments.Rapidly cured restorative materials applied in large increments with self-adhesive properties became an important solution for easy and effective applications.

Restorative materials with bioactive or caries-protective abilities have been introduced, such as glass hybrid materials. Recently, to overcome the limitations of restorative materials, it was attempted to add caries-protective ions, especially alkaline and alkaline earth ions, such as calcium, in addition to phosphate or fluoride. This newly introduced material contains alkalizing properties due to the release of hydroxyl ions.

In 2016, Ivoclar Vivadent developed a new restorative material consisting of a powder and a liquid part and commercially named this product "Cention N".

Cention N has bioactive properties like glass ionomer cements. It has been developed to prevent demineralisation by neutralising acids through ion release. It contains alkaline fillers. Therefore, a new classification as "Alkasites" has emerged.

One lesion in each patient will be randomly assigned to be restored using either the GC Gradia Direct Posterior, Cention N and Equia Forte HT. The adhesive, GC Solare Universal Bond will be used for adhesive procedures. The clinical procedure for the restorations will be performed by a single operator. The restorations will be evaluated by two calibrated examiners at baseline and at 6, 12, months in accordance with the FDI criteria. Data will be statistically analyzed using the Chi-square and Fischer's exact tests (p < 0.05).


47 patients




18 to 65 years old


Accepts Healthy Volunteers

Inclusion criteria

  • Healthy individuals who do not have any systemic disease that prevents restorative treatment
  • Individuals between the ages of 18-65
  • Brushing your teeth twice a day
  • Having at least 20 teeth in occlusion and at least 3 approximal lesions with antagonist teeth in the opposite arch
  • Volunteer individuals who agree to participate in the research and sign the informed consent form and who have undergone initial periodontal treatment will be included in the study.

Exclusion criteria

  • Pregnant or breastfeeding women
  • Individuals with advanced periodontal disease
  • Individuals using removable partial dentures
  • Individuals with bruxism
  • Individuals with malocclusion
  • Patients with known allergies to resin-based restorative materials and bonding agents
  • Patients with a history of allergy to local anesthesia
  • Endodontic treatment, teeth that need pulp capping or endodontic treatment is available

Trial design

Primary purpose




Interventional model

Parallel Assignment


Single Blind

47 participants in 3 patient groups

Cention N (Ivoclar Vivadent, Schaan, Liechtenstein)
Experimental group
Powder: Calcium-fluoro-silicate glass, barium glass, calcium-barium-aluminium fluoro-silicate glass, iso-fillers, ytterbium trifluoride, initiators and pigments. Liquid: Dimethacrylates, initiators, stabilizers, additives and mint flavour. The mixing ratio was 2 parts powder and 2 drops of liquid or 3 parts powder and 3 drops.After distributing the powder and liquid side by side on a mixing pad, the liquid was spread to expand the surface.The first part of the powder was mixed with the entire liquid dispensed on the mixing pad.After the components have been thoroughly mixed, add the remaining powder and stirred again until a homogeneous consistency is obtained (45 - 60 seconds). After careful adaptation to the cavity and densification, occlusal excesses were removed.
Device: Cention N (Ivoclar Vivadent, Schaan, Liechtenstein)
Equia Forte HT ( GC, Tokyo, Japan)
Experimental group
Powder: 95% strontium fluoroalumino-silicate glass. Liquid: 5% polyacrilic acid. Equia Forte HT was mixed in a capsule (10 seconds) and injected into the cavity. After a 2.5 min curing time, occlusal excesses were removed. Equia Coat (GC, Tokyo, Japan) was then applied and light-cured (D-Light Pro, GC, Tokyo, Japan 1,400 mW/cm2) for 20 seconds.
Device: Equia Forte HT ( GC, Tokyo, Japan)
Gradia Direct Posterior ( GC, Tokyo, Japan)
Experimental group
Matrix: Urethanedimethacrylate (UDMA), dymethacrylate camphorquinone. Filler: fluoro-alumino-silicate glass silica powder. After completing the cavity, the enamel surface was selectively roughened using 37% orthophosphoric acid for 30 seconds. Subsequently, GC Solare Universal Bond adhesive agent (GC Corp., Tokyo, Japan) was utilized. It was applied in 2mm layers in accordance with the composite manufacturer's instructions. Each layer was polymerized for 20 seconds.
Device: Gradia Direct Posterior ( GC, Tokyo, Japan)

Trial contacts and locations



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