Effect of Implant Height Differences on Different Attachment Types and Peri-Implant Bone in Mandibular Two-Implant Overdentures: 3D Finite Element Study
| Autor: | Oguz Ozan, Serhat Ramoglu |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Dental Stress Analysis
Orthodontics Materials science business.industry medicine.medical_treatment Finite Element Analysis Dentistry Mandible Left posterior Peri implant bone Denture Overlay Denture Retention Finite element study medicine.anatomical_structure medicine Right posterior Cortical bone Dental Prosthesis Implant-Supported Implant Oral Surgery Dentures business Dental implant |
| Zdroj: | Journal of Oral Implantology. 41:e50-e59 |
| ISSN: | 1548-1336 0160-6972 |
| DOI: | 10.1563/aaid-joi-d-13-00239 |
| Popis: | Implant-supported overdentures with self-aligning attachment systems are preferred to improve the stability and retention of complete dentures. The positioning of the implant attachments is a very important aspect of two-implant overdentures in obtaining better stress distribution. Therefore, the objective of this study was to compare two different attachment systems in a two-implant overdenture by evaluating the stress distributions in peri-implant bone and stresses on the attachments with positioning at different height levels using the 3D FEA method. Six models with ball attachments and 6 models with locator attachments—totaling 12 models (including 2 controls)—with the left implant positioned unilaterally at different height levels were subjected to 3 loading conditions (anterior, right posterior, and left posterior). Data for Von Misses stresses were produced numerically, color coded, and compared among the models for attachments and peri-implant cortical bone. The configurations in which implants presented 3 mm height differences in the bone level showed the most successful results in the peri-implant bone. When stresses on the attachments were compared, greater stress values were obtained from the ball attachments. As a conclusion, the configurations with a considerable (3 mm) height difference between quadrants of the mandible in the anterior segment showed the most successful results in the peri-implant bone. On the contrary, peak stress values around the implant observed from the models with less (1 mm) bone height difference may require leveling of the bone during surgery. However, these findings should be corroborated with clinical studies. |
| Databáze: | OpenAIRE |
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