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Effect of nonsurgical periodontal therapy
Author(s) -
Badersten Anita,
Nilvéus Rolf,
Egelberg Jan
Publication year - 1985
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1111/j.1600-051x.1985.tb02293.x
Subject(s) - clinical attachment loss , dentistry , linear regression , medicine , statistical analysis , linear relationship , chronic periodontitis , periodontitis , orthodontics , mathematics , statistics
. Incisors, cuspids and premolars in 33 patients with advanced chronic periodontitis were treated by plaque control and 1 single episode of supra‐ and subgingival debridement. The results were monitored by probing attachment level measurements for 6 sites of each tooth every 3rd month during a period of 24 months, A total of 1368 sites were observed. From these were selected 280 “non‐responding” sites showing 1.0 mm or more loss of probing attachment at 24 months compared to baseline. Scatter diagrams of the sequence of 9 probing attachment recordings obtained during the 24‐month study were produced for each of these 280 sites. Study of these scatter diagrams resulted in identification of 7 different patterns of probing attachment change over time. A linear pattern of gradual Joss of probing attachment throughout the 24‐month observation period was found for 73% of the non‐responding sites. Of the less frequently seen patterns, 3 approximated a linear course and 3 were non‐linear. Linear analysis of regression as a statistical method to determine attachment loss for individual sites seems to be suitable for sites with linear patterns and for sites approximating a linear pattern. The insensitivity of regression analysis in non‐linear patterns may be acceptable if a cautious analysis is warranted.