Non-Cochrane · intervention · PM42746320
One-Abutment-One-Time Versus Repeated Abutments Disconnections in Platform-Switched Conical Connection Dental.
Abayov Pinny, Bangiev Lior, Mizrahi Lir Ben, et al. · Journal of oral & maxillofacial research · 2026 · PubMed · doi:10.5037/jomr.2026.17201
Findings
Population Adults with bone-level, platform-switched dental implants with internal conical connection
4 findings
| One-abutment-one-time definitive abutment placement | Repeated abutment disconnections and reconnections | Marginal bone loss (mm) Follow-up 1 to 5 years · Random effects model | MD -0.23 [-0.44, -0.02] GRADE not reported 6 studies |
| One-abutment-one-time definitive abutment placement | Repeated abutment disconnections and reconnections | Probing depth (mm) Follow-up 1 to 5 years · Random effects model | MD 0.07 [-0.12, 0.26] GRADE not reported 3 studies |
| One-abutment-one-time definitive abutment placement | Repeated abutment disconnections and reconnections | Marginal bone loss (mm) Follow-up 1 to 5 years · Common effect model | MD -0.15 [-0.21, -0.08] GRADE not reported 6 studies |
| One-abutment-one-time definitive abutment placement | Repeated abutment disconnections and reconnections | Probing depth (mm) Follow-up 1 to 5 years · Common effect model | MD 0.10 [0.05, 0.14] GRADE not reported 3 studies |
Included primary studies 10
Open in Studies| Study | Year | Also included by | Outcomes it informs here | Trial data |
|---|---|---|---|---|
| Calatrava 2024 Effect of one-time placement of the definitive abutment versus multiple healing abutment disconnections and reconnections during the… PMID:39011816 | 2024 | this review only | Marginal bone loss (mm) | not extracted yet |
| Calatrava et al. 2024 Effect of one‐time placement of the definitive abutment versus multiple healing abutment disconnections and reconnections during the… DOI:10.1111/cid.13361 | 2024 | this review only | not stated | not extracted yet |
| D'Avenia 2020 THE IMPACT OF REPEATED ABUTMENT CHANGES ON PERI-IMPLANT TISSUE STABILITY: FIVE-YEAR POST-LOADING RESULTS FROM A MULTICENTRE RANDOMISED… DOI:10.36130/ctd.02.2020.03 | 2020 | this review only | Marginal bone loss (mm) | not extracted yet |
| Hamudi 2021 The Association of the One-Abutment at One-Time Concept with Marginal Bone Loss around the SLA and Platform Switch and Conical Abutment… PMID:35011814 | 2021 | this review only | not stated | not extracted yet |
| Moreira 2021 One-Abutment One-Time Effect on Peri-Implant Marginal Bone: A Prospective, Controlled, Randomized, Double-Blind Study. PMID:34361372 | 2021 | this review only | Marginal bone loss (mm) | not extracted yet |
| Praça 2020 Influence of abutment disconnection on peri-implant marginal bone loss: A randomized clinical trial. PMID:31925984 | 2020 | this review only | Marginal bone loss (mm) | not extracted yet |
| Praça et al. 2020 Influence of abutment disconnection on peri‐implant marginal bone loss: A randomized clinical trial DOI:10.1111/clr.13572 | 2020 | this review only | not stated | not extracted yet |
| Ríos-Santos 2020 One Abutment One Time: A Multicenter, Prospective, Controlled, Randomized Study. PMID:33348644 | 2020 | this review only | Marginal bone loss (mm) | not extracted yet |
| Sanz-Sánchez 2024 The effect of one-time abutment placement on clinical and radiographic outcomes: A 5-year randomized clinical trial. PMID:38506392 | 2024 | this review only | Marginal bone loss (mm) | not extracted yet |
| Sanz-Sánchez et al. 2024 The effect of one‐time abutment placement on clinical and radiographic outcomes: A 5‐year randomized clinical trial DOI:10.1111/clr.14256 | 2024 | this review only | not stated | not extracted yet |
Review question
| Element | Planned (methods) | Found (results) |
|---|---|---|
| Population | Adults (>= 18 years), systemically healthy or well-controlled, receiving bone-level, platform-switched two-piece implants with an internal conical implant-abutment connection | 395 patients and 645 implants across 7 RCTs; mean age 34.33 to 66.23 years (n=7) |
| Intervention | One-abutment-one-time protocol (definitive abutment placed at implant placement and not removed) | OAOT with Zimmer Biomet M+N, Ankylos C/X, Klockner VEGA, MIS C1 and Conelog Screw-Line implants (n=7) |
| Comparison | Repeated abutment disconnections (healing or provisional abutments removed and reconnected at least once during prosthetic stages) | Repeated disconnections, mostly 3 (range 1 to 5) (n=7) |
| Outcomes | Primary: marginal bone loss. Secondary: probing depth, implant survival rate, biological complications, prosthetic complications | Marginal bone loss (n=7; pooled n=6); probing depth (n=3; pooled n=3); survival rate (n=7, narrative); biological complications (narrative); prosthetic complications (n=1 reporting, narrative) |
| Study designs | RCTs with at least 10 patients, human, English, published November 2018 to November 2025 | 6 parallel-group RCTs and 1 split-mouth RCT (split-mouth excluded from meta-analysis) (n=7) |
| Timing | Not specified | Follow-up 1 to 5 years (n=7) |
AMSTAR 2 items
Two independent extractors rated each item. Their ratings are shown side by side because they have not been reconciled yet. The overall rating follows Shea et al. 2017: one critical flaw gives Low, more than one gives Critically Low.
| Item | Extractor A | Extractor B | Agree |
|---|---|---|---|
| 1Research question includes PICO components | Yes | Yes | yes |
| 2Protocol established before the reviewcritical | Partial Yes | Partial Yes | yes |
| 3Choice of study designs explained | No | No | yes |
| 4Comprehensive literature searchcritical | No | Partial Yes | no |
| 5Study selection in duplicate | Yes | Yes | yes |
| 6Data extraction in duplicate | Yes | Yes | yes |
| 7List of excluded studies with reasonscritical | Yes | Yes | yes |
| 8Included studies described in detail | Partial Yes | Yes | no |
| 9Risk of bias assessed satisfactorilycritical | RCT: Partial Yes · NRSI: N/A | NRSI: N/A · RCT: Yes | no |
| 10Funding of included studies reported | No | No | yes |
| 11Appropriate meta-analysis methodscritical | RCT: No · NRSI: N/A | NRSI: N/A · RCT: Yes | no |
| 12Impact of risk of bias on the pooled results | No | No | yes |
| 13Risk of bias accounted for in interpretationcritical | No | No | yes |
| 14Heterogeneity explained | Yes | Yes | yes |
| 15Publication bias investigatedcritical | No | No | yes |
| 16Conflicts of interest reported | Yes | Yes | yes |
| Overall | Critically Low | Critically Low | yes |