Clinical Performance Evaluation of a Glass-ionomer Restorative System Evaluation

Hacettepe University54 enrolled

Overview

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 class I and class II cavities. A total of 140 (80 class I and 60 class II) lesions in 59 patients were restored with a glass ionomer restorative system (Equia) or a micro hybrid composite(Gradia Direct). Restorations were evaluated at baseline and yearly during 9 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

Conditions

Dental Caries

Interventions

EQUIADEVICE

Placing glass ionomer restorations, the dentin and enamel of cavities were conditioned with 20% polyacrylic acid for 20 seconds, washed, and briefly dried. Equia Fil was injected into the cavity. Isolation was maintained using cotton rolls and a saliva ejector. After the setting time of 2.5 minutes, the restoration was polished wet using high-speed fine diamonds. When the restoration was briefly dried, Equia Coat was applied and photocured for 20 seconds using a photo-curing light.

Gradia Direct PosteriorDEVICE

The enamel and dentin were conditioned with G-Bond adhesive using a microtip applicator, left undisturbed for five to 10 seconds, and then dried thoroughly for five seconds with oil-free air under air pressure, Gradia Direct Posterior resin was applied with the incremental technique (2 mm thick layers) and light-cured for 20 seconds. Finally, the restoration was shaped with finishing diamonds and silicon instruments.

Eligibility

Sex: ALLMin age: 20 YearsMax age: 50 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: 1. a need for at least two but not more than four posterior toothcolored restorations; 2. the presence of teeth to be restored in occlusion; 3. teeth that were symptomless and vital; 4. a normal periodontal status; 5. a good likelihood of recall availability. Exclusion Criteria: 1. partly erupted teeth; 2. absence of adjacent and antagonist teeth 3. poor periodontal status; 4. adverse medical history; 5. potential behavioral problems.

Locations (1)

Hacettepe University School of Dentistry

Ankara, Turkey (Türkiye)

Outcomes

Primary Outcomes

Observers evaluated the restorations was performed using the modified United State Public Health Service criteria Observers evaluated the restorations was performed using the modified United State Public Health Service criteria Marginal adaptation

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)

Time frame: From baseline to 9 year the change of restorations was evaluated

marginal discoloration

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 9 year the change of restorations was evaluated

retention rate

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

Data from ClinicalTrials.gov

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