Evidence map›Paper›PMID 41559425›Full record

Trial reportOral and maxillofacial surgery2026

Clinical parameters of implants placed bone level with cover screw or healing abutment techniques. 6 months post-surgery report from a randomized controlled clinical trial.

Carlo Prati, Andrea Spinelli, Jacopo Lenzi, Davide Carboni, Stefano Chersoni, Maria Giovanna Gandolfi, Fausto Zamparini

Abstract readRandomized Controlled TrialComparative Study
PubMed Publisher
In one paragraph

Trial report in Oral and maxillofacial surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Carlo PratiEndodontic clinical section, Dental School, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, 40125, Italy. carlo.prati@unibo.it.
Andrea SpinelliEndodontic clinical section, Dental School, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, 40125, Italy.
Jacopo LenziDepartment of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.
Davide CarboniEndodontic clinical section, Dental School, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, 40125, Italy.
Stefano ChersoniEndodontic clinical section, Dental School, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, 40125, Italy.
Maria Giovanna GandolfiLaboratory of Green Biomaterials and Oral Pathology, Dental School, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, 40125, Italy.
Fausto ZampariniEndodontic clinical section, Dental School, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, 40125, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThis randomized clinical trial evaluated marginal bone level (MBL) changes and peri-implant soft tissue health in single implants placed at crestal bone level, comparing healing abutments exposed at gingival level versus cover screws submerged with a flap.

methodsSixty-six PrimeTaper implants (Dentsply, Mannheim, Germany) were placed in 45 healthy adult patients and randomized to either the healing abutment group (n = 34) or the cover screw group (n = 32). A fully digital workflow was used for provisional and definitive zirconia crowns delivered at 3-4 months. Clinical and radiographic follow-ups were performed at baseline, 3 and 6 months. Outcomes included Bleeding upon Scanbody positioning (BuSP), bleeding upon Prosthetic Abutment application (BuPA) and Mombelli modified plaque score, MBL, and prosthetic complications.

resultsBaseline characteristics were balanced between groups. Implant survival was 100%, with one mucositis case in the healing abutment group. Soft tissue assessment revealed reduced BuSP in the healing abutment group, where approx. 75% of implants showed no BuPA at follow-up (p < 0.001). Mombelli modified plaque score improved over time and did not differ significantly between groups.

conclusionBoth techniques yielded stable peri-implant tissues and comparable MBL changes at 6 months. Healing abutment application reduced bleeding during prosthetic clinical procedures and avoided flap re-entry, offering a simpler, less invasive, and equally effective alternative to cover screw protocols.

Indexed as

Dental AbutmentsDental Implant-Abutment DesignDental Implantation, EndosseousDental Implants, Single-ToothAdultAlveolar Bone LossCrownsFemaleFollow-Up StudiesHumansMaleMiddle AgedSurgical FlapsTreatment OutcomeBone level placementCover screwDental implantsHealing abutmentRandomized clinical trial

Identifiers

PMID41559425

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.