Actively Recruiting
Single Implant Crowns Supported by Narrow or Standard Diameter Implants in Molar Sites: a Randomized Controlled Trial
Led by Mohammed Bin Rashid University of Medicine and Health Sciences · Updated on 2025-07-18
40
Participants Needed
1
Research Sites
95 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are comparing narrow diameter titanium-zirconium (TiZr) dental implants (3.3 mm) to standard diameter TiZr implants (4.5 mm) for replacing single missing molar teeth. This study aims to evaluate the clinical and radiographic outcomes of these implants, focusing on factors such as implant survival, peri-implant tissue health, and biological complications. The trial also investigates how the restorative emergence angle and implant-abutment connection influence implant stability and tissue levels in high-load molar areas. Participants will receive either a narrow or standard diameter TiZr implant to support a screw-retained monolithic zirconia crown in a molar site. The study monitors the effects of prosthetic platform width, emergence angle, and a new TorcFit™ implant-abutment connection, which may distribute stress better and resist torque. This randomized controlled trial runs over three years, assessing outcomes at multiple timepoints including three, twelve months, and annually thereafter. During the study, participants will undergo clinical exams, radiographic imaging, and measurements of peri-implant mucosal recession, implant stability, bone levels, keratinized tissue dimensions, and prosthetic success. Follow-up visits occur at baseline, three months, twelve months, and annually up to three years. Researchers will assess implant survival rates and biological complications while carefully tracking participant compliance and oral hygiene. The total participation spans three years with detailed monitoring throughout.
CONDITIONS
Brief Title
Single Implant Crowns Supported by Narrow or Standard Diameter Implants in Molar Sites
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Aged 18 years or older
- Require replacement of a single missing molar tooth with a dental implant in a fully healed site
- Controlled oral hygiene with full-mouth plaque and bleeding scores of 25% or less at baseline
- Intact adjacent teeth and opposing dentition
- Fully healed sites for at least 6 months with limited bone width of 6 mm or less and minimum bone height of 8 mm
- Good compliance and commitment to attend follow-up appointments
- Willing to provide informed consent
You will not qualify if you...
- Presence of localized or generalized periodontitis
- Any medical condition that contraindicates implant treatment
- Bone metabolic disease or use of medications affecting bone metabolism
- Long-term use of non-steroidal anti-inflammatory medications
- History of malignancy, radiotherapy, or chemotherapy
- Pregnant or lactating women
- Smokers
- Severe bruxism or parafunctional habits
- Large occlusal discrepancies
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Up to 3 years
Participants receive a single dental implant crown supported by either a narrow or standard diameter implant to replace a missing molar tooth.
Baseline visit for implant placement and follow-up visits at 3 and 12 months, then annually up to 3 years
Duration - Up to 3 years after implant placement
Participants are monitored for implant success, peri-implant mucosal health, bone levels, and prosthetic outcomes after treatment.
Follow-up visits at 3 and 12 months, then annually for up to 3 years
Trial Site Locations
Total: 1 location
1
MBRU
Dubai, United Arab Emirates
Actively Recruiting
Research Team
M
Momen A Atieh, BDS, MSc, DClinDent, PhD, FPFA
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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