Trial reportClinical oral investigations2025
Influence of intermediate abutment height and timing of placement on marginal bone loss in single implant-supported crowns: a 12-month follow-up randomized clinical trial.
Trial report in Clinical oral investigations, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06667531 (Influence of Intermediate Abutment Height and Timing of Placement on Peri-implant Marginal Bone Loss in Single Implant-supported Crowns), which is not on this map. Cited by 6 papers.
What it found
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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.
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.
Influence of Intermediate Abutment Height and Timing of Placement on Peri-implant Marginal Bone Loss in Single Implant-supported Crowns: a 12-month Follow-up Randomized Clinical Trial.
Who cites it
6 citing papers in PubMed.
- Prosthetic Retention Mode and Peri-Implant Marginal Bone Level at a Minimum Five-Year Follow-Up After Maxillary Sinus Floor Elevation: A Retrospective Clustered Cohort Study.Journal of functional biomaterials · 2026Article
- Abutment height matters - but not always: the role of prosthetic retention type in peri-implant marginal bone loss.The journal of advanced prosthodontics · 2026Review
- Implant Surface Characteristics and Peri-Implant Outcomes: A Systematic Review of Clinical and Microbiological Evidence.Bioengineering (Basel, Switzerland) · 2026Review
- Biomechanical Effects of Platform Diameter and Screw Length in an Abutment-Free Tissue-Level Implant System Compared with a Ti-Base Configuration: 3D Finite Element Analysis.Journal of functional biomaterials · 2025Article
- Influence of Design Parameters on Implant Abutment Performance: A Scoping Review.Journal of functional biomaterials · 2025Review
- Mechanical performance of narrow dental implants with varying lengths and angled abutments.Bioinformation · 2025Article
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesTo determine the most effective combination of abutment height and timing of placement in reducing marginal bone loss (MBL). MATERIALS AND
methods54 patients received at least one single screw-retained crown on an implant replacing a posterior tooth (60 implants). Implants were divided into six groups based on intermediate abutment height (1.5 mm, 2 mm, 3 mm) and timing of placement (immediate: surgery 1; delayed: surgery 2): Group A3I (height 3, surgery 1), Group A2I (height 2, surgery 1), Group A15I (height 1.5, surgery 1), Group A3D (height 3, surgery 2), Group A2D (height 2, surgery 2), Group A15D (height 1.5, surgery 2). Mesial and distal linear radiographic measurements were taken at five follow-up points: implant surgery, crown placement (T1), and 3 (T2), 6 (T3), and 12 months after loading (T4). Partial and total MBL were compared between groups.
resultsAfter 12 months, the lowest MBL was found in groups A3I (0.13 ± 0.11 mm) and A2I (0.24 ± 0.11 mm), with no statistical difference between them. Groups A15I (0.70 ± 0.12 mm), A3D (0.66 ± 0.11 mm), A2D (0.62 ± 0.12 mm), and A15D (0.78 ± 0.11 mm) showed significantly higher MBL than groups 1 and 2, with no statistical difference among them.
conclusionsImmediate abutments of 2-3 mm resulted in lower MBL compared to 1.5 mm immediate abutments or any delayed abutments. CLINICAL RELEVANCE: This study provides data on the optimal combination of intermediate abutment height and placement timing in preventing MBL. CLINICAL
trial registrationClinical trial registration number: NCT06667531. link: https://clinicaltrials.gov/study/NCT06667531 .
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