The outer surfaces of the implants are macroscopic with retentions, usually screws provided courses on which they first find their footing in the bone. In the course of healing takes place, the so-called osseointegration, whereby the implant completely fixed in the alveolar bone healing process. This process takes place on a microscopic scale and provides the proper anchoring of the implant.
The natural tooth is suspended in the periodontal tissues and moves to the influence of the chewing forces are minimal. In contrast, an implant is not movable, and by the so-called osseointegration intimately connected with the bone. This anchoring is accomplished in the weeks of healing and is dependent on bone quality in the different jaw sections are quite different.
In the first period after the implant keeps this set only by the retention of the surface) (eg screw gears. This is called the primary, which is superseded by the secondary stability, with the bone connects firmly with the surface of the implant. During the transition period, the implant should not be charged because there is a stability gap, which can lead to early losses (Fig.): the course of osseointegration. After completion of healing, the implant is safe and can be fitted with a prosthesis.
