Abstract
An adequate amount of vertical and horizontal bone is a prerequisite for long-term stability of intraosseous implants. Consequently it is necessary to carry out measures to improve the bone condition in cases where there is a large bone loss or a deficiency in the absolute amount of bone. Appropriate measures include the GBR method which uses a covering membrane, as well as autogenous and bone substitute implants.
The authors presented basic research and clinical cases, and carried out investigations into these methods. At the present time it seems the GBR method is best for obtaining osseointegra-tion of implants.
