Longitudinal evaluation of the excisional new attachment procedure in humans.

Evaluation of the Excisional New Attachment Procedure (ENAP) was extended to 3 years postoperatively. Generally, there was an overall mean increase in sulcus depth of 0.5 mm; an overall mean increase in recession of 0.1 mm; and an overall mean decrease in the amount of previously gained new attachment of 0.6 mm between 1 year and 3 years after surgery. These values reflected a statistically significant, but clinically insignificant, difference in mean sulcus depth and mean attachment level between the two evaluation periods. Only one tooth site demonstrated clinical findings worse than those determined preoperatively. These results are similar to those of other longitudinal studies.