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Three-dimensional finite element analysis of implant stability in the atrophic posterior maxilla : A mathematical study of the sinus floor augmentation by Gabor Tepper; Robert Haas; Werner Zechner; Wolfgang Krach; Georg Watzek is a Dentistry article available to read on EtoBox.

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**Abstract:** Sinus lifting is performed with a variety of materials and techniques without a precise knowledge of the quantity of augmentation. This study based on three‐dimensional finite element analysis was designed to show which surgical procedure and which amount of peri‐implant packing yields the best bony support for dental implants. Eight 3D‐FE models were used. Four modeled standard situations simulated quantitatively different packing situations produced by differences in surgical approach: i. no packing; ii. thin 1 mm bony sheath; iii. oblique subcomplete packing; iv. complete bony peri‐implant packing up to the implant end. A fifth model compared a standard implant with a length of 13.5 mm and a diameter of 3.75 mm with a 7‐mm‐long and 5‐mm‐thick implant. In three additional models the stress response of the bone–implant system was evaluated in the absence of a cortical layer, thus simulating an extreme degree of maxillary atrophy. In all models the modeled implants were loaded at their points of emergence with an assumed force of 100 N. The vector of the loading force was inclined 30° posteriorly relative to the implant axis and 30° away from the sagittal plane. The b

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Author

Gabor Tepper; Robert Haas; Werner Zechner; Wolfgang Krach; Georg Watzek

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0905-7161)

Published

2002

Language

EN

Field

Dentistry (Health Sciences)