Histological evaluation of probing depth following periodontal treatment

Abstract
The periodontal probing depth in teeth exposed to periodontal treatment were compared with teeth having received no treatment. In pockets deeper than 4 mm, a significant difference was found between the 2 groups. In the nontreated teeth, metal strips used for probing penetrated an average of 0.29 mm into the connective tissue apical to the junctional epithelium. The average probing depth for teeth exposed to scaling, root planing, curettage and chlorhexidine rinses for 1 mo. was 0.31 mm coronal of the connective tissue attachment within the junctional epithelium. Care should be taken when evaluating changes in periodontal probing measurements during longitudinal studies.