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Composite Restorations in Primary Molars

Clinical Performance of a Preheated Thermoviscous Bulk-Fill Composite and Two Different Indirect Composite Systems in Primary Molars: A Randomized Controlled Trial

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07761897
Acronym
Composite Rest
Enrollment
90
Registered
2026-08-12
Start date
2022-03-01
Completion date
2025-01-15
Last updated
2026-08-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Caries Class Ii, Caries; Dentin, Restoration

Keywords

caries, primary molars, thermoviscous bulk-fill composite, indirect composite restorations, clinical performance, FDI criteria

Brief summary

The aim of this study was to compare the clinical performance of direct restorations with two different indirect composite systems in primary teeth.

Detailed description

The aim of this study was to compare the clinical performance of a thermoviscous bulk-fill composite used in direct restorations with two different indirect composite systems in primary teeth. This randomized, controlled, assessor-blind, parallel-group design in vivo study included 158 teeth from 73 patients aged 4-10 years. The teeth were allocated into three groups: direct thermoviscous bulk-fill composite, indirect nano-hybrid composite inlay system, and indirect nano-hybrid modular composite system. Clinical evaluations were performed according to FDI criteria at 6- and 12-month follow-up, and survival comparisons were conducted.

Interventions

OTHERFédération Dentaire Internationale (FDI) criteria.

The clinical performance of restorations was evaluated using Fédération Dentaire Internationale (FDI) criteria. Restorations were assessed across functional (fracture and retention, marginal adaptation), biological (postoperative sensitivity, recurrent caries, tooth integrity, and periodontal response), and esthetic (surface polish, marginal and surface staining) domains using a five-point scale. Scores of 1-3 were considered clinically acceptable, whereas scores of 4-5 were considered clinically unacceptable and indicative of failure

OTHERsurvival comparison

For survival comparisons, restoration failure was defined as total or partial loss of the restoration or a clinically unacceptable score according to FDI criteria. Restorations maintaining acceptable clinical performance throughout the follow-up period were considered successful.

Sponsors

Izmir Katip Celebi University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Masking description

The study was carried out as a one-blinded trial, which the outcomes assessor was unaware of what material was applied to each tooth. No blinding was done during the treatment period because all treatments were performed by one dentist.

Intervention model description

This randomized, controlled, parallel design, assessor-blind study was conducted under in vivo conditions to compare the clinical performance of direct and indirect restorations applied to carious primary molar teeth.

Eligibility

Sex/Gender
ALL
Age
4 Years to 10 Years
Healthy volunteers
Yes

Inclusion criteria

* children aged between 4 and 10 years, * classified as ASA I according to the American Society of Anesthesiologists (i.e., healthy individuals without systemic disease except for conditions not affecting general health), * demonstrating cooperative behavior corresponding to Frankl Behavior Rating Scale scores of 3 (positive) or 4 (definitely positive). * Only patients presenting with Angle Class I occlusion * demonstrating bilateral, balanced mastication were included in the study. * Teeth included in the study were required to present with Class II (MO/DO) cavities and to have an antagonist and proximal contact. * According to the International Caries Detection and Assessment System II (ICDAS II), teeth with scores of 4, 5, or 6 were included. * In addition, only teeth with a plaque index score of 0 (no plaque) or 1 (plaque not visible to the naked eye but detectable with a probe at the gingival margin) * a gingival index score of 0 (healthy gingiva, no inflammation) were selected

Exclusion criteria

* patients who do not meet the inclusion criteria * teeth that do not meet the inclusion criteria * Teeth showing internal and external resorption on radiographic examination * Patients/guardians who declined to participate in the study and participants who did not sign the consent form

Design outcomes

Primary

MeasureTime frameDescription
Fédération Dentaire Internationale (FDI) criteriaClinical evaluations were performed according to FDI criteria at 6- and 12-month follow-upThe clinical performance of restorations was evaluated using Fédération Dentaire Internationale (FDI) criteria. Restorations were assessed across functional (fracture and retention, marginal adaptation), biological (postoperative sensitivity, recurrent caries, tooth integrity, and periodontal response), and esthetic (surface polish, marginal and surface staining) domains using a five-point scale. Scores of 1-3 were considered clinically acceptable, whereas scores of 4-5 were considered clinically unacceptable and indicative of failure

Secondary

MeasureTime frameDescription
survival comparison6- and 12-month follow-upFor survival comparisons, restoration failure was defined as total or partial loss of the restoration or a clinically unacceptable score according to FDI criteria. Restorations maintaining acceptable clinical performance throughout the follow-up period were considered successful.

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 13, 2026