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
Abstract Purpose Implant-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 c...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-11-01
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| Series: | International Journal of Implant Dentistry |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40729-023-00511-0 |
| _version_ | 1797630164391165952 |
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| author | Takashi Uesugi Yoshiaki Shimoo Motohiro Munakata Daisuke Sato Kikue Yamaguchi Michiya Fujimaki Kazuhisa Nakayama Tae Watanabe Paulo Malo |
| author_facet | Takashi Uesugi Yoshiaki Shimoo Motohiro Munakata Daisuke Sato Kikue Yamaguchi Michiya Fujimaki Kazuhisa Nakayama Tae Watanabe Paulo Malo |
| author_sort | Takashi Uesugi |
| collection | DOAJ |
| description | Abstract Purpose Implant-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. Methods We 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. Results The 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). Conclusions All-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. |
| first_indexed | 2024-03-11T11:04:18Z |
| format | Article |
| id | doaj.art-60745caef4e54b2997cfead96cce7ea4 |
| institution | Directory Open Access Journal |
| issn | 2198-4034 |
| language | English |
| last_indexed | 2024-03-11T11:04:18Z |
| publishDate | 2023-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Implant Dentistry |
| spelling | doaj.art-60745caef4e54b2997cfead96cce7ea42023-11-12T12:19:03ZengSpringerOpenInternational Journal of Implant Dentistry2198-40342023-11-019111710.1186/s40729-023-00511-0The 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 rateTakashi Uesugi0Yoshiaki Shimoo1Motohiro Munakata2Daisuke Sato3Kikue Yamaguchi4Michiya Fujimaki5Kazuhisa Nakayama6Tae Watanabe7Paulo Malo8Malo Dental and Medical TokyoMalo Dental and Medical TokyoDepartment of Implant Dentistry, Showa University School of DentistryDepartment of Implant Dentistry, Showa University School of DentistryDepartment of Implant Dentistry, Showa University School of DentistryMalo Dental and Medical TokyoMalo Dental and Medical TokyoMalo Dental and Medical TokyoMalo Dental and Medical TokyoAbstract Purpose Implant-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. Methods We 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. Results The 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). Conclusions All-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.https://doi.org/10.1186/s40729-023-00511-0All-on-fourImmediate loadingImplant failureSurvival rateEdentulous |
| spellingShingle | Takashi Uesugi Yoshiaki Shimoo Motohiro Munakata Daisuke Sato Kikue Yamaguchi Michiya Fujimaki Kazuhisa Nakayama Tae Watanabe Paulo Malo 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 International Journal of Implant Dentistry All-on-four Immediate loading Implant failure Survival rate Edentulous |
| title | 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| topic | All-on-four Immediate loading Implant failure Survival rate Edentulous |
| url | https://doi.org/10.1186/s40729-023-00511-0 |
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