| Autor: |
Pessoa, Roberto S, Sousa, Ravel M, Pereira, Leandro M, Neves, Flavio D, Bezerra, Fabio JB, Jaecques, Siegfried, Vander Sloten, Jos, Quirynen, Marc, Teughels, Wim, Spin-Neto, Rubens |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Zdroj: |
Pessoa, R S, Sousa, R M, Pereira, L M, Neves, F D, Bezerra, F J B, Jaecques, S V N, Sloten, J V, Quirynen, M, Teughels, W & Spin-Neto, R 2016, ' Bone Remodeling Around Implants with External Hexagon and Morse-Taper Connections : A Randomized, Controlled, Split-Mouth, Clinical Trial ', Clinical Implant Dentistry and Related Research . https://doi.org/10.1111/cid.12437 |
| DOI: |
10.1111/cid.12437 |
| Popis: |
OBJECTIVES: To evaluate clinical, radiographic, microbiologic, and biomechanical parameters related to bone remodeling around implants with external hexagon (EH) and Morse-taper (MT) connections.MATERIALS AND METHODS: Twelve totally edentulous patients received four custom-made implants in the interforaminal region of the mandible. Two of those implants had the same macroscopic design, but different prosthetic connections. All patients received an immediate implant-supported prosthesis. Clinical parameters (periimplant probing pocket depth (PPD), modified gingival index (mGI), and mucosal thickness (MTh)) were evaluated at 12 months follow-up. The distance between the top of the implant and the first bone-to-implant contact (IT-FBIC) was evaluated on standardized digital peri-apical radiographs acquired at 1, 3, 6, and 12 months follow-up. Samples of the subgingival microbiota were collected 1, 3, and 6 months after implant loading and used for the quantification of Tanerella forsythia, Porphyromonas gingivalis, Aggragatibacter actinomycetemcomitans, Prevotella intermedia, and Fusobacterium nucleatum. Further, 36 computerized-tomography based finite element (FE) models were accomplished, simulating each patient under three loading conditions.RESULTS: The evaluated clinical parameters were equal for EH and MT implants. Mean IT-FBIC was significantly different between the tested connections (1.17 ± 0.44 mm for EH, and 0.17 ± 0.54 mm for MT, considering all evaluated time periods). No significant microbiological differences could be observed between tested connections. FE analysis showed a significantly higher peak of equivalent (EQV) strain (p = 0.005) for EH (mean 3,438.65 µε) compared to MT (mean 840.98 µε) connection.CONCLUSIONS: Radiographic periimplant bone loss depends on the implant connection type. MT connections showed less periimplant bone loss, compared to EH connections. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
