Finite Element Analysis of Bone Stress in the Posterior Mandible Using Regular and Short Implants, in the Same Context, with Splinted and Nonsplinted Prostheses
| Autor: | Danilo Zaparolli, Denise Pupim, Ana Paula Macedo, Maria da Glória Chiarello de Mattos, Marcelo Bighetti Toniollo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Dental Stress Analysis
Molar Finite Element Analysis 0206 medical engineering Dentistry Context (language use) Mandible 02 engineering and technology 03 medical and health sciences 0302 clinical medicine stomatognathic system Dental Prosthesis Design Premolar Humans Medicine Bicuspid Dental Implants Crowns business.industry Dental prosthesis 030206 dentistry General Medicine 020601 biomedical engineering Splints medicine.anatomical_structure Denture Partial Fixed Dental Prosthesis Implant-Supported Implant Oral Surgery business |
| Zdroj: | The International Journal of Oral & Maxillofacial Implants. 32:e199-e206 |
| ISSN: | 0882-2786 |
| DOI: | 10.11607/jomi.5611 |
| Popis: | Purpose: The aim of this study was to compare the bone stress generated by rehabilitation using regular and short-length Morse taper implants (11 and 5 mm, respectively) in the same context and allied with splinted (SP) and nonsplinted (NSP) prostheses in the posterior area of the mandible using finite element analysis. Materials and Methods: Three-dimensional geometric models using regular implants (∅4 × 11 mm) and short implants (∅4 × 5 mm) were simulated with a left posterior mandible that had the first premolar tooth and all teeth posterior to that premolar removed. The four experimental groups were as follows: Group 1 NSP (two regular implants and one short implant rehabilitated with nonsplinted prostheses), Group 1 SP (two regular implants and one short implant rehabilitated with splinted prostheses), Group 2 NSP (one regular implant and two short implants rehabilitated with nonsplinted prostheses), and Group 2 SP (one regular implant and two short implants rehabilitated with splinted prostheses). Oblique forces were simulated in molars (365 N) and premolars (200 N). Qualitative and quantitative analyses of the minimum principal stress in bone were performed using the ANSYS Workbench software, version 10.0. Results: The splinted prostheses decreased the stress to the surrounding bone of short implants. Moreover, they also decreased the stress on the surrounding bone adjacent to the tooth. However, the splinted prostheses generated higher stress in the coverage of the surrounding bone for regular intermediate implants and prominently in the bone at the implant cervical region, at the edge crest, compared with the individualized groups. Conclusion: The benefits in the use of splinted prostheses are notable for the preservation of the bone surrounding the short implants and tooth; however, it is necessary to evaluate each clinical situation because, in this context, the regular implants are at higher stress than the individualized implants. |
| Databáze: | OpenAIRE |
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