Five-year evaluation of Lifecore Restore implants: a retrospective comparison with Nobel Biocare MK II implants.

Purpose: The purpose of this study was to compare survival rates and marginal bone resorption of the Lifecore (LC) Restore Implant System with the benchmark Nobel Biocare (NB) MK II Implant System.

Materials And Methods: All implants were inserted by the same surgeon and all radiological analyses were performed by the same radiologist. Two hundred ninety LC implants were analyzed radiologically after 1 year and compared with the same number of NB implants serving as a historical reference group.

Factors affecting late fixture loss and marginal bone loss around teeth and dental implants.

Background: The predictability and high success rate of implant treatment have averted attention from factors affecting fixture loss and bone loss around implants.

Purpose: The goal of this study was to retrospectively evaluate late fixture loss and marginal bone loss around implants that have been in function for 5 years and to relate these findings to bone loss in the natural dentition.

Materials And Methods: One hundred and forty-three consecutively treated patients who had received an implant-anchored fixed prosthesis and completed a 5-year follow-up were selected.

Loose gold screws frequently occur in full-arch fixed prostheses supported by osseointegrated implants after 5 years.

The possible occurrence of loose gold and abutment screws retaining full-arch osseointegrated prostheses has been investigated. The prostheses had been in use for at least 5 years. The findings were related to clinical parameters such as accuracy of the superstructure, operator dependence, and clinical and radiological diagnosis of implant status after 5 years.

Incidence of adverse effects of dental materials.

Acute and long-standing adverse effects from dental materials used in the treatment of 13,325 patients in 15,820 appointments were recorded by 137 dentists. Twenty-four suspected side effects were reported by the patients and 22 by the clinicians; 7 were classified as "probable" or "possible" acute reactions and 15 as long-standing effects, 13 being "verified" and 2 "probable". In another survey, 31 dentists representing a total of 387 years of practice recollected 113 patients with side effects from dental materials.