Effect of Phosphoric Acid Etching Duration on Direct Resin-Based Composite Restorations in Permanent Anterior Teeth

The goal of this clinical trial is to learn if reducing the phosphoric acid etching (PAE) time affects the performance of direct resin-based composite (RBC) restorations in permanent anterior teeth. It will also learn about the safety of using a shortened PAE protocol. The main questions it aims to answer are: Does a shorter PAE time lead to more or less marginal staining in restored teeth? What sensitivity or other clinical issues do participants experience after restoration using different PAE times? Researchers will compare a reduced PAE protocol to a standard PAE protocol to see how each affects the outcome of Class III and IV anterior restorations. Participants will: Receive one or two direct RBC restorations using either a shortened or standard PAE protocol Visit the clinic for follow-ups at baseline, and at 1, 2, 3, and 5 years after restoration Have sensitivity and restoration quality evaluated using clinical exams, photographs, and questionnaires

NCT Number	NCT06991842
Lead Sponsor	Florin Eggmann
Conditions	Dental Restoration, Permanent, Dental Caries (Disorder), Dental Restoration Failure
Enrollment	66 participants
Start Date	2025-06-01
Primary Completion	2031-05-31 (estimated)
Study Completion	2031-12-31 (estimated)
Updated on ClinicalTrials.gov	2025-08-05