- prominent atrophy of bone tissue of maxillae and mandible;
- stomatic carcinoma;
- past radiotherapy;
- tuberculosis;
- mental diseases.

Everything not referring to contraindictions is an indication for the procedure by means of the bicortical screw system.
The implant may be inserted is specific cases, e.g.:
- directly after extraction of tooth in a patient;
- in patients with parodontosis;
- in patients with thin alveolar process.

Implantation procedure with the use of the bicortical screw is not painful. It requires use of a very small amount of topical anaesthetic, i.e. only in the place of implant insertion. The insertion of the implant does not require any incision or separation of mucoperiosteal flap. Minimal invasiveness of the procedure means that patient convalescence period is not indispensable. Thus, there is no swelling and postoperative pain as is the case with two-phase implants, i.e. loaded with a prosthesis after 3 or 6 months.

Unfortunately, they can. The main reasons for failures are disturbances in occlusion, i.e. in teeths intercusping, when there is a contact (articulation) between antagonistic teeth of the maxilla and mandible. The appearance of traumatic nodes and traumatic occlusion causes as a consequence occlusion injury. The occlusion injury, direct or indirect, static or dynamic on the prosthetic reconstruction (crown, bridge) induces transmission of incorrect force distribution through the implant onto the surrounding live bone tissue. This tissue undergoes necrosis due to ischaemia. Every biologically living organism, to defend itself, eliminates dead tissues, thus OSTEOLYSIS will occur around the implant. For a patient, a direct consequence of osteolysis will be implant mobility (stable at first), rejection. Thus, the hygiene of oral cavity is not a determining factor, deciding implant rejection. To maintain the positive results of implantation it is thus indispensable to perform periodic check-up visits to ensure that the implantoprosthesis is always balanced.

Balanced occlusion and articulation are thus a guarantee of implantotherapy!

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