Kang MH, et al. - Researchers retrospectively ascertained the marginal bone loss around Straumann tissue-level dental implants during follow-up periods among which the maximum lasts up to 10 years. They also evaluated the predisposing risk factors for peri-implant marginal bone loss. Only slight peri-implant marginal bone loss, with a very low incidence of pathologic marginal bone loss exceeding 2mm, was demonstrated by Straumann tissue-level dental implants. The peri-implant marginal bone loss was affected by the diameter of the implant; as seen on multivariate analysis.