The aim of this clinical trial was to compare the clinical performances of a glass ionomer restorative system with a micro hybrid resin based composite in extended sized class II cavities. A total of 100 class 2 lesions were restored with a glass ionomer restorative system (Equia Forte) or a micro hybrid composite (G-aenial Posterior). Restorations were evaluated at baseline and yearly during 6 years according to the modified-USPHS criteria. Data were analyzed with Cohcran's Q and McNemar's tests (p\<0.05).
Since the introduction of glass ionomers many modifications of these materials have been performed over the years. Compared to other permanent filling materials like resin-based composites, glass ionomers show several advantages, such as the ability to adhere to moist enamel and dentin and anti-cariogenic properties such as the long-term fluoride release. So, it was doubtful that glass ionomers represent a capable counterpart of amalgam or resin-based composites in posterior teeth.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
50
Glass ionomer restorative system
Micro hybrid composite resin
Hacettepe University School of Dentistry
Ankara, Turkey (Türkiye)
Observers evaluated the restorations was performed using the modified United State Public Health Service criteria regarding marginal adaptation.
Marginal adaptation was evaluated by 2 independent clinicians. Visual inspection with a mirror at 18 inches was performed . A score means the higher score of clinical acceptability while C and D score means that the restoration has failed and needs to be replaced. Alpha 1: Harmonious outline Alpha 2: Marginal gap (max 100μ) with discoloration (removable) Bravo: Marginal gap (\> 100μ) with discoloration (unremovable) Charlie: The restoration is fractured or missed.
Time frame: From baseline to 6 year the change of restorations was evaluated
Observers evaluated the restorations was performed using the modified United State Public Health Service criteria regarding marginal discoloration.
Marginal discolouration was evaluated by 2 independent clinicians. Visual inspection with a mirror at 18 inches was performed . A score means the higher score of clinical acceptability while C score means that the restoration has failed and needs to be replaced. Alpha: No discoloration anywhere along the margin between the restoration and the adjacent tooth. Bravo: Slight discoloration along the margin between the restoration and the adjacent tooth. Charlie: The discoloration penetrated along the margin of the restorative material in a pulpal direction.
Time frame: From baseline to 6 year the change of restorations was evaluated
Observers evaluated the restorations was performed using the modified United State Public Health Service criteria regarding retention rate.
Retention rate was evaluated by 2 independent clinicians. Visual inspection with a mirror at 18 inches was performed . A score means the higher score of clinical acceptability while C and D score means that the restoration has failed and needs to be replaced. Alpha 1:Clinically excellent Alpha 2: Clinically good with slight deviations from ideal performance, correction possible without damage of tooth or restoration Bravo: Clinically sufficient with few defects, corrections or repair of the restoration possible Charlie: Restoration is partially missed Delta: Restoration is totally missed
Time frame: From baseline to 6 year the change of restorations was evaluated
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Observers evaluated the restorations was performed using the modified United State Public Health Service criteria regarding anatomic form.
Anatomic form was evaluated by 2 independent clinicians. Visual inspection with a mirror at 18 inches was performed . A score means the higher score of clinical acceptability while C score means that the restoration has failed and needs to be replaced. Alpha 1: Continuous with existing anatomical form Alpha 2: Slightly discontinuous due to some chipping on the proximal ridge Bravo: Discontinuous with existing anatomical form due to material loss but proximal contact still present Charlie: Proximal contact is lost with ridge fracture.
Time frame: From baseline to 6 year the change of restorations was evaluated
Observers evaluated the restorations was performed using the modified United State Public Health Service criteria regarding color change
Colour changes was evaluated by 2 independent clinicians. Visual inspection with a mirror at 18 inches was performed . A score means the higher score of clinical acceptability while C score means that the restoration has failedand needs to be replaced. Alpha: The restoration matches the adjacent tooth structure in color and translucency. Bravo: Light mismatch in color, shade or translucency between the restoration and the adjacent tooth. Charlie: The mismatch in color and translucency is outside the acceptable range of tooth color and translucency.
Time frame: From baseline to 6 year the change of restorations was evaluated