Abstract
The Guided Bone Regeneration Technique (GBR) to place a Gore-TexTM Augmentation Material (GTAM) in a patient with insufficient remaining bone height of the maxilla was used at the time of placing a blade type implant. In the second surgery, the GTAM was removed and observed under an optical microscope and a scanning electron microscope. The findings were as follows:
1. Even though bacteria were present on the mucoperiosteum side of the outer portion (OP) of the GTAM adjacent to the tooth and implant head, the GBR was effective, provided that no bacteria intruded into other portions.
2. When bacteria intruded into the OP adjacent to the tooth and implant head, the mucoperiosteum side of the inner portion (IP) covering the defective portion with insufficient remaining bone height, an intertubercular gap, and the alveolar bone side of the IP, the GBR had no effect.
From this, it could be suggested that the GBR is applicable if the infection of bacteria can be blocked on the mucoperiosteum side of the OP of the GTAM placed in a portion with insufficient remaining bone height of the maxilla for supporting the implant.
