Irregular Implant Design Decreases Periimplant Stress and Strain Under Oblique Loading.

Abstract:

OBJECTIVES:To investigate whether a different implant geometry with the same potential contact surface area (PCSA) affects the principal stress and strains in bone. MATERIAL AND METHODS:Three-dimensional finite-element models were created with a single endosseous implant embedded in bone. The irregular (IR) dental root-analog implant and regular (R) cylindrical implant with the same PCSA 350 mm were modeled, keeping the size of the thinnest implant wall 0.8 mm, and the thinnest bone wall 1 mm. The regular or irregular abutments were either 4.5 mm lower than the platform of the implants or 5 mm higher than the platform of the implants, both with the taper 1.44°. A 100 N vertical or 100 N vertical/50 N horizontal occlusal loading was applied. The biomechanical behaviors of periimplant bone were recorded. RESULTS:The IR implant design experienced lower periimplant stress and strain under oblique loading than that of R implant design. In the IR implant design, comparable stress in bone, implant, and abutment were found under 100 N vertical loading or 100 N vertical/50 N horizontal loading. In the R implant design, much higher stress in bone, implant, and abutment were found under 100 N vertical/50 N horizontal loading than that under 100 N vertical loading. CONCLUSION:Irregular dental root-analog implant is a biomechanically favorable design principle for decreasing periimplant stress and strain under oblique loading.

journal_name

Implant Dent

journal_title

Implant dentistry

authors

He L,Zhang J,Li X,Hu H,Lu S,Tang Z

doi

10.1097/ID.0000000000000662

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

744-750

issue

5

eissn

1056-6163

issn

1538-2982

pii

00008505-201710000-00016

journal_volume

26

pub_type

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