Risk indicators for marginal bone resorption around implants in function for at least 4 years: A retrospective longitudinal study.

Background: Marginal bone stability is considered one of the most important issues in implant dentistry. It is essential to understand how various factors influence bone resorption around implants. The purpose of this retrospective longitudinal study was to identify potential risk indicators associated with marginal bone resorption around implants in function for at least 4 years.

The relationship between the bone characters obtained by CBCT and primary stability of the implants.

Background: The aim of this study is to investigate the correlation between the thickness of the cortical bone or the voxel values that are obtained by cone beam CT (CBCT) and the insertion torque values (ITVs) or the implant stability quotient (ISQ) values.

Methods: A pig's ilium was used as the implant placement site. The implants used in this study were two kinds of diameters (3.