Composite Resins, Composite Restoration, Restoration Design, Teeth Sensitivity
Conditions
Keywords
Short fiber-reinforced composite, preheating, Class I cavities, FDI criteria, randomized clinical trial
Brief summary
To clinically evaluate the performance of preheated versus non-preheated short fiber-reinforced composite (SFRC) restorations in Class I posterior cavities over a 12-month period
Detailed description
Resin-based composites are widely used for posterior restorations due to their aesthetic properties and adhesive capabilities. However, polymerization shrinkage stress and insufficient fracture resistance remain major concerns in stress-bearing areas. Short fiber-reinforced composites (SFRCs) were developed to improve mechanical properties and crack-stopping ability. everX Posterior (GC Corporation, Tokyo, Japan) contains randomly oriented E-glass fibers within a resin matrix, enhancing fracture toughness and load-bearing capacity. Preheating composite materials has been proposed to reduce viscosity, improve flow, enhance cavity adaptation, and potentially increase the degree of conversion. Elevated temperature reduces internal friction among monomers, thereby improving polymerization kinetics. Despite promising laboratory findings, limited clinical evidence exists regarding the impact of preheating on SFRC performance. Therefore, this randomized clinical trial aimed to evaluate the clinical behavior of SFRC restorations placed with and without preheating in Class I cavities over 12 months
Interventions
OTHERPreheated everX Posterior composite
Application of everX Posterior composite after preheating to 54°C using a composite warmer, followed by placement, adaptation, and curing according to manufacturer guidelines.
OTHERNon-preheated everX Posterior composite
Application of everX Posterior composite at room temperature, placed and cured according to manufacturer instructions.
Sponsors
Tanta University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
25 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
* Presence of bilateral Class I carious lesions in posterior teeth requiring restorative treatment * Teeth with vital pulps and no signs of irreversible pulpitis * Good general health
Exclusion criteria
* Patients with poor oral hygiene or high caries risk * Presence of parafunctional habits (e.g., bruxism) * Patients with systemic diseases affecting oral health or salivary flow
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Marginal adaptation | Baseline, 6 months, 9 months, and 12 months | Assessment of the marginal integrity of restorations using FDI criteria, including presence of gaps, discoloration, or ditching at restoration margins. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Restoration retention and fracture resistance | Baseline, 6 months, 9 months, and 12 months | Evaluation of restoration survival, including retention and presence of fractures or chipping, according to FDI functional criteria. |
| Postoperative sensitivity | Baseline, 6 months, 9 months, and 12 months | Assessment of patient-reported sensitivity following restoration placement, evaluated clinically using FDI biological criteria |
| Recurrence of caries | Baseline, 6 months, 9 months, and 12 months | Detection of secondary caries associated with the restorations using clinical examination based on FDI criteria. |
Countries
Egypt
Outcome results
None listed