The effects of early occlusal loading on one-stage titanium alloy implants in beagle dogs: a pilot study.
The initial stages of bone healing with titanium alloy implants were compared clinically and histologically in three groups of beagle dogs: unloaded one-stage (group 1), loaded one-stage (group 2), and unloaded two-stage (group 3). No implant mobility was reported in any of the three groups. For the most part direct bone contact was achieved, but there was a significant difference in the histologic results of the interface among the animals in all three groups. Significant crestal bone loss was evident in group 2, which showed poor bone apposition to the bottom of the threads in the upper portion of the implant. New bone growth to these same areas of the threads was seen in the animals in groups 1 and 3, with the ratio of direct bone contact significantly higher for those in group 3. These differences could be attributed to the effect of early occlusal loading on the implant during initial bone healing.
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