Evaluation of Marginal Bone Loss (MBL) 12 Months Post-loading of Implants Supporting Individual C… (NCT06667531) | Clinical Trial Compass
CompletedNot Applicable
Evaluation of Marginal Bone Loss (MBL) 12 Months Post-loading of Implants Supporting Individual Crowns, Based on the Height of the Intermediate Abutment and Its Placement Time. Immediate Abutments of 2 or 3 Mm Show the Lowest MBL, Whereas 1.5 Mm or Delayed Abutments Are Associated with Higher MBL.
Spain54 participantsStarted 2022-06-15
Plain-language summary
Objectives:To determine which combination of abutment height and timing of placement is most effective in reducing marginal bone loss (MBL).
Materials and Methods: 54 patients received at least one single screw-retained crown on an implant replacing a posterior tooth (60 implants). The implants were divided into six treatment groups based on the height (1.5 mm; 2 mm; 3 mm) and timing of placement (immediate: surgery 1; delayed: surgery 2) of the intermediate abutment: group 1 (height 3; surgery1), group 2 (height 2; surgery1), group 3 (height 1.5; surgery1), group 4 (height 3; surgery2), group 5 (height 2; surgery2), group 6 (height 1.5; surgery2). Mesial and distal linear radiographic measurements (from the implant shoulder to the bone crest) were performed at five follow-up times: implant surgery, crown placement (T1), and at 3 (T2), 6 (T3), and 12 months after loading (T4). Partial and total MBL were compared among the treatment groups.
Who can participate
Age range
21 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Healthy adults.
* Plaque and bleeding indices below 10%.
* Absence of chronic periodontal diseases (periodontitis) or acute periodontal diseases (periodontal abscess).
* Presence of intact alveolar walls.
* Sufficient bone height and width.
* Need for restoration of a tooth in the posterior maxillary or mandibular region (premolars and molars).
* Incorporation into a periodontal maintenance program.
Exclusion Criteria:
* History of systemic disease or radiotherapy contraindicating bone surgery.
* Pregnant or breastfeeding women.
* Smokers of more than 10 cigarettes per day.
* Parafunctional habits.
* Alcohol or drug abuse.
* Narrow interproximal spaces (less than 9 mm).
* Placement of implants flapless or post-extraction.
* Insertion torque during implant placement below 35 Ncm.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Marginal bone loss (MBL) measured in mm (mm) 12 months after loading the implant.