Actively Recruiting
Effect of Phosphoric Acid Etching Duration on Direct Resin-Based Composite Restorations in Permanent Anterior Teeth
Led by Florin Eggmann · Updated on 2025-08-05
66
Participants Needed
1
Research Sites
343 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
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
CONDITIONS
Official Title
Effect of Phosphoric Acid Etching Duration on Direct Resin-Based Composite Restorations in Permanent Anterior Teeth
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Signed informed consent
- Age 18 years or older
- Need for Class III or IV resin-based composite restoration on a permanent anterior tooth due to proximal carious lesion with cavitation, defective restoration replacement, or necessary proximal reshaping
- Vital teeth with normal sensitivity
- Preoperative tooth sensitivity and biting discomfort less than 3 on VAS scale
- Good oral hygiene and clinical periodontal health
- Sufficient language skills to understand and follow study procedures
You will not qualify if you...
- Inability to isolate and control contamination during restorative procedure
- Class IV restoration needed due to crown fracture, crown-root fracture, extensive wear, or incisal edge caries
- Missing opposing tooth without prosthetic replacement
- Planning professional tooth bleaching within 5 years after restoration
- Known or suspected allergy to materials used (e.g., methacrylates, local anesthetics)
- Pregnancy or breastfeeding
- Acute or chronic health conditions affecting participation or study procedures
AI-Screening
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Trial Site Locations
Total: 1 location
1
University Center for Dental Medicine Basel UZB
Basel, Canton of Basel-City, Switzerland, 4058
Actively Recruiting
Research Team
F
Florin Eggmann, PD Dr. med. dent.
CONTACT
R
Roland Weiger, Prof. Dr. med. dent.
CONTACT
How is the study designed?
Study Type
INTERVENTIONAL
Masking
DOUBLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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