Evaluation of Full Veneered Porcelain-Fused-to-Metal Crowns Cemented With Self-Adhesive Resin Cement Using Two Curing Modes

Launched by CAIRO UNIVERSITY · Jun 27, 2025

Keywords

ClinConnect Summary

This clinical trial is studying two different ways to attach porcelain-fused-to-metal (PFM) crowns, which are tooth-shaped caps used to cover and protect damaged back teeth. The study compares a method that uses a special glue cured with a light for 20 seconds on each side (dual-cured) versus a method where the glue hardens on its own without light (self-cured). The main goal is to see which method keeps the crown in place better over time. Researchers will also look at how well the crown fits, whether any new tooth decay develops around it, and if there is any discoloration at the edges of the crown. Participants will be followed for 18 months with check-ups at the start, 6, 12, and 18 months.

Adults who need a full PFM crown on a back tooth may be eligible if they are 21 or older, have healthy enough teeth to support a crown, and maintain good oral hygiene. People with active gum disease, serious teeth grinding habits, poor oral care, pregnancy, certain health problems, allergies to materials used, or those currently in other dental studies or orthodontic treatment cannot join. If you take part, you will have your crown placed using one of the two cement methods, and you’ll attend regular visits so the dental team can check how well the crown is holding up and look for any issues. This study aims to help dentists choose the best way to secure these crowns for long-lasting results.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • 1. Adult patients requiring full coverage PFM crown restorations
• • 2. Age ≥ 21 years
• • 3. Vital or endodontically treated teeth
• • 4. Sufficient tooth structure for crown retention
• • 5. Willing and able to provide written informed consent
• • 6. Ability to attend all follow-up appointments
• • 7. Adequate oral hygiene as determined by the investigator
• Exclusion Criteria:
• • 1. Patients with active periodontal disease (probing depth \> 4mm, bleeding on probing)
• • 2. Patients with severe parafunctional habits (e.g., bruxism confirmed by clinical examination)
• • 3. Poor oral hygiene (plaque index \> 30%)
• • 4. Pregnancy or nursing
• • 5. Systemic diseases affecting treatment outcomes (e.g., uncontrolled diabetes, immunosuppression)
• • 6. Known allergies to study materials (metal alloys, porcelain, or resin cement components)
• • 7. Inability to comply with study requirements
• • 8. Current participation in other dental clinical trials
• • 9. Active orthodontic treatment