How different implant abutment shapes and heights affect bone loss around dental implants

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This randomized clinical trial compares four combinations of abutment type and height placed on bone-level dental implants to see how supracrestal soft tissue interactions affect marginal bone levels, implant success, probing depth, and bleeding on probing over time. Participants are adults with posterior missing teeth who meet health criteria and have sufficient bone, undergoing implant-supported rehabilitation with an one-abutment-one-time protocol. Implants are placed about 2 mm below the crest, and four groups receive different abutment configurations to isolate shape and height effects. Outcomes include changes in marginal bone level, PPD, BoP, and overall implant success. The study aims to determine if abutment design choices influence clinical performance and bone remodeling.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Adults aged 18 years or older.
* Posterior edentulism (premolars/molars).
* Good general and oral health, with controlled plaque and bleeding indices.
* Sufficient bone height and width for implant placement without the need for bone regeneration procedures. Patients who require indirect sinus lift procedure simultaneously with implant placement may be included in the study.
* Presence of at least 2 mm of keratinized mucosa around the dental implant.
* Stable occlusion and healthy periodontium.
* Insertion torque ≥ 35 Ncm at the time of implant placement.
* Willingness to comply with study protocol and attend scheduled follow-up visits.

Exclusion Criteria:

* Presence of medical conditions that contraindicate implant surgery, such as heavy smoking (\>10 cigarettes per day), severe bruxism, pregnancy or breastfeeding, bisphosphonate therapy, and patients undergoing chemotherapy or radiotherapy in the head and/or neck area.
* Active periodontal disease or peri-implant infection.
* Uncooperative patients or patients unable to complete follow- up.
* Implant failures.

Where it's running

• Universitat de València
  Valencia, Valencia, Spain Recruiting

Study contacts

• Principal investigator: María I Suárez Antoima, DDS — Universitat de València
• Study coordinator: Juan C Bernabeu Mira, DDS, MSc, PhD
• Email: juan.c.bernabeu@uv.es
• Phone: +34 697348312

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.