Actively Recruiting
Effect of Placing the Implant Crown on the Implant on the Same Day as the Implant vs. 4 Weeks Later.
Led by University of Bern · Updated on 2026-02-18
100
Participants Needed
2
Research Sites
630 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
In this study, participants with one lower first molar that require removal and replacement using dental implants will be enrolled. The implant will be inserted 12-16 weeks after tooth extraction and restored either immediately with an artificial tooth (fixed implant crown) in 50% of the cases or 4 weeks later in the remainder 50%. Immediate and early loading will be compared and the investigators expect no difference in terms of implant success and health of the tissue around the implant.
CONDITIONS
Official Title
Effect of Placing the Implant Crown on the Implant on the Same Day as the Implant vs. 4 Weeks Later.
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Age 20 years or older
- Willingness to sign informed consent and participate in the study
- Dental plaque index less than 35% according to Silness and Loe
- Presence of a mandibular first molar that requires extraction
- Sufficient vertical space (7 mm) for implant crown placement
- Presence of an opposing natural or artificial tooth
- Ridge height adequate for placing an implant at least 10 mm long
- Ridge width sufficient for a 4.1 mm diameter implant
You will not qualify if you...
- Physical or mental conditions that prevent proper oral hygiene or informed consent
- Conditions interfering with healing or contraindicating implant surgery such as uncontrolled diabetes, immunosuppression, radiation, chemotherapy, frequent antibiotics, or antiresorptive medications
- Pregnancy or breastfeeding
- Planning to become pregnant between enrollment and implant loading
- Heavy smoking (10 or more cigarettes per day)
- Severe teeth grinding or clenching, or ongoing facial pain
- Insufficient ridge width or height for the implant
- Defects in any alveolar bone wall discovered at tooth extraction
- Implant stability quotient (ISQ) below 70 at implant placement or loading visit
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Trial Site Locations
Total: 2 locations
1
Klinik für Oralchirurgie und Stomatologie
Bern, Switzerland, 3010
Actively Recruiting
2
Klinik für rekonstruktive Zahnmedizin und Gerodontologie
Bern, Switzerland, 3010
Actively Recruiting
Research Team
S
Simone FM Janner, PD Dr.
CONTACT
S
Samir Abou-Ayash, Dr.med.dent.
CONTACT
How is the study designed?
Study Type
INTERVENTIONAL
Masking
SINGLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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