Effects of cortical bone thickness and trabecular bone density on primary stability of orthodontic mini-implants.

ABSTRACT:

Background/purpose

Mini-implant screws are now routinely used as anchorage devices in orthodontic treatments. This study used synthetic bone models to investigate how the primary stability of an orthodontic mini-implant (OMI) as measured by resonance frequency (RF) is affected by varying cortical bone thickness and trabecular bone density.

Materials and methods

Three synthetic cortical shells (thicknesses of 1, 2, and 3 mm) and three polyurethane foam blocks (densities of 40, 20, and 10 pound/cubic foot) were used to represent jawbones of varying cortical bone thicknesses and varying trabecular bone densities. Twenty-five stainless steel OMIs (2 × 10 mm) were sequentially inserted into artificial bone blocks to depths of 2, 4, and 6 mm. Five experimental groups of bone block

SUBMITTER: Pan CY 

PROVIDER: S-EPMC6921117 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature