The Tabanella Bone Chisel 1 is specifically designed to perform interproximal ostectomy during periodontal osseous surgery. In particular the instrument allows to execute a very precise ostectomy by creating a natural slope of 10° from buccal to lingual. This ergonomic and specific design results very helpful to obtain an esthetic result in periodontal osseous surgery when there is still a surgical need to remove the interproximal bony craters.