Efeito do controle da placa supragengival na recolonização bacteriana subgengival após raspagem e alisamento radiculares

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The purpose of the present study was to evaluate changes in the composition of the subgingival microbiota after scaling and root planing (SRP) alone or combined with professional supragingival plaque removal and/or rinsing with 0,12% chlorhexidine. Fifty seven volunteers with chronic periodontitis were selected and randomly assigned to 4 therapeutic groups: Control (n=15): SRP+placebo rinses 2x/day (P); Test 1 (n=14): SRP+chlorhexidine rinses 2x/day (CHX); Test 2 (n=14): SRP+P+professional supragingival plaque removal 2x/day (PPR) and Test 3 (n=14): SRP+CHX+PPR. The PPR and the rinsing begun with the SRP therapy and continued for 42 days after the end of this procedure. Subgingival plaque samples were collected at baseline, after SRP, 42 and 63 days later and analyzed for the content of 38 bacterial species using the Checkerboard DNA-DNA Hybridization technique. Groups Test 1 and 3, which rinsed with chlorhexidine, showed the most beneficial changes in the recolonization of subgingival sites. Besides having showed a greater number of species significantly reduced when compared to groups Test 2 and C, those therapies were more effective in reducing total bacterial counts after initial therapy. All treatment modalities reduced the levels of the 3 red complex pathogens, P.gingivalis, T. forsythensis and T. denticola, after SRP. These results were significantly maintained up to 63 days in groups Test 1 and 3. However, at this time point there were no significant differences for T. denticola in group C and for T. denticola and P. gingivalis in group Test 2.The levels of other periodontal pathogens such as P. acnes and P. melaninogenica were also reduced in groups Test 1 and 3. Species considered being beneficial, such as V. parvula and S. sanguinis were found in these groups in higher levels, when compared to baseline, whereas in groups C and Test 2 these species were minimally affected. These results suggest that the use of chlorhexidine exerts a positive effect in the subgingival recolonization after periodontal therapy in subjects with chronic periodontitis who have not been treated before.

ASSUNTO(S)

chlorhexidine clorexidina microbiota subgengival subgingival microbiota supragingival plaque control profilaxia dentária odontologia

ACESSO AO ARTIGO

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