Bone Grafting (Bone Augmentation)

Many factors must be considered if a treatment with implant-carried denture is planned. Often there is too little bone substance in the jaw, so it is not unusual for a bone graft to be used before an implantation. Quantity and quality of the implant-carrying bone must be able to withstand the load.

In addition, bone augmentation can be used to treat other conditions such as: root apices resection; tooth extraction; or where cyst(s) are present.

Causes of a bone defect

  • periodontitis
  • long lasting toothlessness
  • inflamed teeth
  • abscesses
  • bad sitting denture
  • accidents

If the bone regresses, it cannot regenerate – however a bone grafting operation offers the possibility for bones to recover as well as providing a natural supporting fabric.

Operation

Bone augmentation can be classified by the type of the defect which gets corrected:

  • correction of the height,
  • correction of the width,
  • correction of the height and the width.

If there is a certain height of disposable bone, then the implants can be placed in at the same time as the bone grafting operation. The prosthetic treatment can be continued after a healing of 6-9 months.

In case of a strongly reduced bone offer, only the bone grafting will be made, as the primary stability required by the implants is not yet ensured. After the introduction of the bone substitute and a sufficient healing the implants can be set into the new implant camp during a second operation (approx. 4-6 month).

Bone grafting procedures are performed under local anaesthetic with the use of following materials:

  • own bone block– during the operation the necessary bone is taken with a special drill and then we implant it in the desired position. Smaller bone blocks can be taken from the lower jaw, around the wisdom teeth, or even the point of the chin.
  • bone substitutes –among other things, animal bone or specially manufactured (synthetic) materials.
  • bone substitute can be combined with grafts from the patient

The augmentated place is often covered with a solvent membrane (and possibly fastened with titanium needle), so that an unimpaired healing of the bone is ensured.

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