[Periodontal reaction to interdental osteotomy].

Interdental osteotomy presents a small risk for the tooth adjacent to the line of the osteotomy. Five out of 41 teeth adjacent to the site of an osteotomy showed loosening degree 1. The PM index rose from 1.0 to 1.4. The depth of the periodontal pockets did not change. The roots of two out of 41 teeth were damaged during osteotomy, but not devitalized.