Severely Atrophic Mandibles Restored With Fiber-Reinforced Composite Prostheses Supported by 5.0-mm Ultra-Short Implants Present High Survival Rates Up To Eight Years
| Autor: | Rolf Ewers, Paolo Perpetuini, Mauro Marincola, Adelina Morina, Edmara T.P. Bergamo, Yu-Chi Cheng, Estevam A. Bonfante |
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| Rok vydání: | 2022 |
| Předmět: |
medicine.medical_treatment
Radiography Alveolar Bone Loss Cumulative Survival Rate Dentistry Mandible Cohort Studies medicine Humans Dental Restoration Failure Survival rate Reduction (orthopedic surgery) Dental Implants TAXA DE SOBREVIVÊNCIA business.industry Dental Implantation Endosseous Significant difference Alveolar Ridge Augmentation Middle Aged Survival Rate Short implants Treatment Outcome Dental Prosthesis Design Otorhinolaryngology Surgery Dental Prosthesis Implant-Supported Implant Oral Surgery business Follow-Up Studies Prosthesis Survival |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0278-2391 |
| Popis: | Purpose Encouraging results have been reported for ultrashort single implants; however, long-term investigations are warranted for full-arch reconstructions. This study evaluated marginal bone loss, implant, and reconstruction survival of fiber-reinforced composite full-arch prostheses supported by 4 ultrashort implants. Methods Patients with severely atrophic mandibles (Cawood and Howell class V and class VI) were included in this cohort study. Study predictors included time (initial and last follow-up) and vertical (epicrestally or subcrestally) and horizontal implant position (medial or lateral). Outcome variables included bone level changes over time, implant/prosthesis survival. Peri-implant bone level was measured on panoramic radiographs. Descriptive statistics, Kaplan-Meier, mixed model analysis of variance, and univariate and multivariate Cox Proportional Hazards Regression models, adjusted for multiple implants in the same patient, were used for data analyses. Results Eighteen patients (mean 61.22 years old), with 72 implants placed in atrophic mandibles with an average follow-up of 55.4 months (CI, ±4.6/ SD, ±10.6 months) were analyzed. The implant survival rate was 97.2% as 2 implants were not loaded due to non-osseointegration and sensorial disturbances. Average marginal bone level at baseline (1.93 mm) and at the time of last recall (1.91 mm) was not significantly different. While implants placed subcrestally showed no significant difference between baseline (1.91 mm) and last follow up bone level (2.12 mm), implants placed epicrestally demonstrated a significant reduction on their bone level over time (initial: 1.97 mm/ final:1.33 mm). Systemic disorders were a risk factor for implant survival and bone loss. Prostheses cumulative survival rate was 100% (mean observation period of 55 months). The estimated survival rate after the 96-month follow-up was 75% (1 framework fracture after 84 months). Conclusion Fixed fiber-reinforced composite full-arch prostheses retained by 4 ultrashort implants showed a stable bone level and high implant/prostheses survival rates up to 8 years. |
| Databáze: | OpenAIRE |
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