17 In some cases, the bone deficit is too large to be built up simultaneously with an implant. The jawbone is reconstructed to its original shape. To do this, the bone substitute material is applied and covered with a membrane to stabilize the contours. The membrane protects the bone substitute material against ingrowth of soft tissue during the remodeling process. This allows the substitute material to convert into stable jawbone. After a few months, the membrane has been absorbed by the body cells and the augmented jawbone is stable and suitable for the insertion of an implant. After a period of time, the implant is prosthetically restored by placing a crown on the implant abutment. Chewing strength and esthetics are restored. Collagen membrane for the protection and stabilization of the bone substitute material
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