ArticleInternational journal of implant dentistry2023
The All-on-four concept for fixed full-arch rehabilitation of the edentulous maxilla and mandible: a longitudinal study in Japanese patients with 3-17-year follow-up and analysis of risk factors for survival rate.
Article in International journal of implant dentistry, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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14 citing papers in PubMed, 21 citations in OpenAlex.
- Investigation of the long-term prognosis (3-13 Years) of full mouth implant prosthetics combining zygomatic implants based on the all-on-four concept.International journal of implant dentistry · 2026Article
- Biomechanical evaluation of cantilever length and arch form in the All-on-4 implant concept: a finite element analysis.BMC oral health · 2026Article
- Finite Element Analysis of Peri-Implant Stress in Maxillary All-on-Four Rehabilitation: Effects of Posterior Implant Angulation and Loading Protocol.Materials (Basel, Switzerland) · 2026Article
- Long-term outcomes and complications of full-arch implant-supported fixed prostheses: a 4-10 year retrospective study.BMC oral health · 2026Article
- Rehabilitation of the Atrophic Edentulous Maxilla: A Retrospective Cohort Study Comparing Survival of Delayed-Loaded Implants in Grafted Bone Versus Immediately Loaded Implants in Native Bone.Clinical and experimental dental research · 2025Article
- Biomechanical comparison of various implant inclinations and abutment types in a bendable implant system.BMC oral health · 2025Article
- Mechanical and Biological Complications Two Years After Full-Arch Implant-Supported Prosthetic Rehabilitation: A Retrospective Clinical Study.Clinics and practice · 2025Article
- A Study Comparing the Efficacy of "The All-on-Four Implants" in the Maxillary and the Mandibular Arches.Cureus · 2025Article
- Immediate Loading of Implants-Supported Fixed Partial Prostheses in Posterior Regions: A Systematic Review.Dentistry journal · 2025Review
- Evaluation of Polymethyl Methacrylate as a Provisional Material in a Fully Digital Workflow for Immediate-Load Complete-Arch Implant-Supported Prostheses over Three Months.Materials (Basel, Switzerland) · 2025Article
- Conventional scan body vs. scan bodies with auxiliary geometric devices: anFrontiers in oral health · 2025Article
- Article
- A Technical Note on a Modified Subcrestal Buccal Flap Approach to All-on-Four: A Case Report.Cureus · 2024Article
- A Study of the Associated Risk Factors for Early Failure and the Effect of Photofunctionalisation in Full-Arch Immediate Loading Treatment Based on the All-on-Four Concept.Bioengineering (Basel, Switzerland) · 2024Article
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Authors and funding
9 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeImplant-supported immediately loaded fixed full-arch rehabilitation via All-on-four treatment yields good long-term results for both the maxilla and the mandible. However, the risk factors affecting long-term implant survival are unknown, and the long-term prognosis of All-on-four concept procedures in Japanese individuals has not been elucidated. We aimed to determine the cumulative implant survival rate after 3-17-year follow-up and identify the associated risk factors.
methodsWe analysed 561 cases (307 maxillae, 254 mandibles) with 2364 implants (1324 maxillae, 1040 mandibles) that received All-on-four treatment. We investigated the cumulative implant- and patient-level survival rates and various risk factors for implant failure. Statistical analysis was performed using the log-rank test for differences in Kaplan-Meier curves, univariate analysis using the Chi-square test, and multivariate analysis for risk factors affecting the survival rate.
resultsThe cumulative survival rate was 94.4% by patient level and 97.4% by implant level for the maxilla, and 96.7% by patient level and 98.9% by implant for the mandible, with up to 17 years of follow-up. The maxillary survival rate at the implant level was significantly lower (p < 0.05). Furthermore, the maxillary survival rate within 24 months was significantly lower at the implant level (p < 0.01). Multivariate analysis revealed that the maxilla was the most significant risk factor (p < 0.01).
conclusionsAll-on-four treatment yielded high long-term survival rates in Japanese patients. However, the maxilla showed a significantly lower cumulative survival rate than the mandible, while early failure was significantly higher. Furthermore, the maxilla was a significant risk factor influencing the survival rate.
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