Effect of root debridement on the elimination of Actinobacillus actinomycetemcomitans and Bacteroides gingivalis from periodontal pockets.
The aims of this 6-month longitudinal study were: (1) to investigate to what extent root debridement of pockets in adult periodontitis will reduce the subgingival presence of Actinobacillus actinomycetemcomitans, Bacteroides gingivalis and some other bacterial groups; (2) to relate the microbiological results following debridement to clinical measurements of healing. 16 patients and a total of 111 periodontally involved sites with probing depth greater than or equal to 6 mm served for the study. Duplicate subgingival microbial samples and duplicate clinical recordings were obtained 1 week apart at baseline and at 6 months following supra- and subgingival debridement. The results demonstrated reductions of the mean total viable counts and reductions of the mean counts of several of the cultured groups of micro-organisms coupled with significant improvements of mean clinical measurements. B. gingivalis was eliminated from a majority of infected subgingival sites. A. actinomycetemcomitans, on the other hand, still remained after therapy in a high proportion of sites initially infected with this microorganism. Subgingival persistence of A. actinomycetemcomitans appeared to be associated with a reduced healing response following debridement. Further studies are needed to clarify why A. actinomycetemcomitans is poorly eliminated following debridement. Also, the long-term clinical significance of the subgingival perseverance of A. actinomycetemcomitans needs to be elucidated.
Department of Periodontology, Public Dental Service, Kristianstad, Sweden.
S
S
Renvert
M
M
Wikström
G
G
Dahlén
J
J
Slots
J
J
Egelberg
D000188:Actinobacillus / Q000302:isolation & purification*; D000328:Adult; D001439:Bacteroides / Q000302:isolation & purification*; D015169:Colony Count, Microbial; D003773:Dental Plaque / Q000517:prevention & control; D012534:Dental Scaling; D005883:Gingival Crevicular Fluid / Q000378:metabolism; D005884:Gingival Hemorrhage / Q000517:prevention & control; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D010514:Periodontal Pocket / Q000382:microbiology* / Q000473:pathology / Q000628:therapy; D010518:Periodontitis / Q000382:microbiology*; D013357:Subgingival Curettage; D014092:Tooth Root / Q000601:surgery; D014945:Wound Healing