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Oral & Craniofacial Tissue Engineering

Edited by Ole T. Jensen, DDS, MS

Official Journal of the Tissue Engineering Society, the Chinese Society of Oral Biomedicine, and the Japanese Society of Regenerative Medicine

ISSN (print) 2158-3722 • ISSN (online) 2158-3706

Oral & Craniofacial Tissue Engineering
Winter 2012
Volume 2 , Issue 4

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Biomechanics and Peri-implantitis: The Effect of a Subcrestal Wing-Thread to Decrease Alveolar Crestal Bone Strain. Theory, Finite Element Analysis, and Clinical Application

Zvi Laster, DMD/Ilan Weissberg/Fares Kablan, DMD

Pages: 327-333
DOI: 10.11607/octe.0015

Purpose: This study used finite element analysis and a clinical case example to test the hypothesis that a wing-thread placed 4 mm below the top of an implant would decrease crestal bone loss in function. Materials and Methods: Finite element analysis was used to compare standard and wing-thread implants subjected to axial and off-axis forces based on the hypothesis that decreasing bone strain at the alveolar crestal margin improves peri-implant bone stability. A clinical case example of the wing-thread implant was followed for 30 months. Results: Stress concentration was diminished at the crest when a wing-thread was used compared to a standard implant body. Ninety-degree lateral forces were diminished by a factor of 10 in the wing-thread implant. A patient followed for 30 months showed stable bone levels around the wing-thread implants. Conclusion: The wing-thread hypothesis appears to have some support for increasing bone stability based on finite element analysis and early clinical results. Oral Craniofac Tissue Eng 2012;2:327333. doi: 10.11607/octe.0015

Key words: biomechanics, bone loss, bone strain, mechanostat, peri-implantitis, wing-thread

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