Abstract
It is pointed out as a weakness of one-piece implant that it is difficult to use the implant at the insufficient
bone mass site because of lack of initial fixation after implantation and loosening by occlusal force. In such
cases two-piece implants have been preferentially used. However, two-piece implants also have a few
weaknesses that they are complicated operation, lower mechanical strength, long healing period, and so on.
On the other hand, HA coated implants can be early fixed with bone after implantation due to the osteoconductivity
of HA. Therefore, it was considered that one-piece HA coated implants can be used at the
insufficient bone mass site.
From this point of view we have reported a few papers that the one-piece HA coated implants (AQB
implants) were successfully used clinically at the insufficient bone mass site. Furthermore, in this paper a new
alveolar bone regeneration therapy was developed by combining one-piece HA coated implants and autologous
bone graft.
