Saleh Saber, Fariba and Abolfazli, Nader and Jannatii Ataei, Soheil and Taghizade Motlagh, Mahsa and Gharekhani, Vahede (2017) The effect of repeated torque tightening on total lengths of implant abutments in different internal implant‒abutment connections. Journal of Dental Research, Dental Clinics, Dental Prospects, 11 (2). pp. 110-116. ISSN 2008-210X
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Abstract
Background. Since the misfit of crown has an important role in clinical performance of implant-supported prostheses, and due to the impact of the settling effect on misfit, the aim of this study was to investigate the impact of torque forces on the total lengths of narrow and short implant abutments in different internal implant‒abutment connections. Methods. In four different implant‒abutment connections, 8 analog implants with a normal diameter (4 mm) and narrow abutment (4.5 mm) were selected from groups of internal hex, internal octagon, morse hex 6° and morse hex 11°. Each of them was mounted within plaster type IV, and 32 samples were obtained. Then, the amount of vertical displacement was measured by closing the impression copings and applying torques of 20 25 and 30 Ncm. This stage was repeated for the abutment. In the next stage, the resin pattern was built and measurements were performed after applying the torques mentioned. Finally, after making the frame, this stage was repeated, and the settling effect was statistically analyzed with ANOVA. Results. In the stages of impression coping, resin pattern and final prosthesis, HEXAGONE had significantly the highest and OCTAGONE had the lowest rates of settling, and the settling of morse hex 11° and 6° was between them. Conclusion. Octagon implant had significantly the lowest settling in various clinical and laboratory stages by applying different torques.
Item Type: | Article |
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Subjects: | Library Keep > Medical Science |
Depositing User: | Unnamed user with email support@librarykeep.com |
Date Deposited: | 20 May 2023 06:55 |
Last Modified: | 23 Jan 2024 04:41 |
URI: | http://archive.jibiology.com/id/eprint/911 |