This study evaluated the stability of 96 implants placed in 4 different densities of bone during the critical period of early healing. The timely visits allowed for a better view of the changes in bone following implant placement.· The lowest values for interfacial stiffness between the bone and the implant were found at 1month. This effect was most pronounced in D4 bone, and although it was observed in D1 bone, the change was not statistically significant. · Healing responses of D2 and D3 bone were more similar to D1 than to D4 bone. · The mean ISQ values at 1 week did not statistically differ from those at the day of placement in all bone types.
· The lack of significant change in stability from 60th to 90th day for D1, D2, and D3 bone suggests further testing of an even shorter loading protocol. · With regards to D4 bone, the current 90 days healing period could be evaluated and potentially shortened. Although the results obtained in the study indicate that the implants in D4 bone drew level to the implants in denser bone by the end of 3 months, however, the effect of occlusal loads during this early modeling period might influence the stability patterns.
· This study suggests that with the use of Dentascans, bone density of the desired implant site can be objectively determined and could serve as a predictor of loading protocol to be used. With advancing interest in immediate loading of single-unit restorations, a study involving analysing the stability patterns of single-unit, immediately loaded implants in D1 and D2 bone would offer insight into this relatively new field of study. The effect of splinting versus non-splinting could be compared in an RFA study involving immediate hybrids and immediate single-unit restorations. It would be beneficial in these studies to also examine occlusal factors as possible variables in the healing process.