Onlays made from different 3D‑printable resins for root‑canal treated molars
One-year Clinical Evaluation of Onlay Restorations Fabricated With Three Different Additive Manufacturing Resins in Endodontically Treated Teeth: A Prospective Study
This study will test if onlays printed from three different resin materials perform well on molar teeth that have had root canal treatment.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 48 (estimated) |
| Ages | 18 Years to 84 Years |
| Sex | All |
| Sponsor | Mersin University Academic / other |
| Locations | 2 sites (Mersin, Mersin and 1 other locations) |
| Trial ID | NCT06960070 on ClinicalTrials.gov |
What this trial studies
The trial compares onlays fabricated by additive manufacturing (3D printing) using three different dental resins: Saremco print resin, Varseosmile Crownplus, and Varseosmile TriniQ. Eligible molars are those previously treated with root canal therapy that have certain occlusal and proximal defects above the gum line and adjacent/opposing teeth present. Onlays will be designed from digital scans and produced layer-by-layer, then placed as indirect restorations and followed clinically for performance. The study contrasts this approach with the context of traditional subtractive milling by focusing on fit, durability, and clinical success of the printed resin onlays.
Who should consider this trial
Good fit: Ideal candidates are adults with molar teeth that have undergone root canal treatment, have occlusal and a single adjacent-surface defects above the gingival margin, and have opposing and adjacent teeth present.
Not a fit: Patients with fractured or cracked teeth, active bruxism or TMJ disorders, vital (non–root canal) teeth, missing adjacent or opposing teeth, or known allergies to resin components are unlikely to benefit or be eligible.
Why it matters
Potential benefit: If successful, patients could receive durable, precisely fitting onlays made with less material waste and potentially lower production cost.
How similar studies have performed: Laboratory and early clinical reports show promising results for 3D‑printed dental resins, but long-term clinical evidence comparing specific resin onlays is still limited.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Molar teeth that have undergone root canal treatment * Teeth with proximal defects located above the gingival margin * Defects limited to the occlusal surface and a single adjacent surface * Presence of an occlusal defect extending over one-third of the distance between the fissure and the cusp tip and involving one or more cusps * Presence of an opposing tooth or a fixed prosthetic restoration against the tooth to be restored * Presence of adjacent teeth next to the tooth to be restored Exclusion Criteria: * Fractured or cracked teeth * Patients with temporomandibular joint disorders * Patients with bruxism (teeth grinding) * Molar teeth without an opposing tooth or fixed prosthetic restoration * Molar teeth without adjacent teeth * Vital teeth * Patients with a history of allergy to the components of the resins
Where this trial is running
Mersin, Mersin and 1 other locations
- Mersin University Faculty of Dentistry — Mersin, Mersin, Turkey (Türkiye) (Recruiting)
- Mersin University — Mersin, Mersin, Turkey (Türkiye) (Not_yet_recruiting)
Study contacts
- Study coordinator: Esra Cengiz Yanardag, DDS, PhD
- Email: esracengiz@mersin.edu.tr
- Phone: +905052443472
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.