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  • Title: Effect of a chlorhexidine mouthwash on the risk of postextraction bacteremia.
    Author: Tomás I, Alvarez M, Limeres J, Tomás M, Medina J, Otero JL, Diz P.
    Journal: Infect Control Hosp Epidemiol; 2007 May; 28(5):577-82. PubMed ID: 17464918.
    Abstract:
    OBJECTIVE: To investigate the prevalence, duration, and etiology of bacteremia following dental extractions performed after a single administration of chlorhexidine mouthwash. DESIGN AND SETTING: A randomized, controlled trial performed in a university hospital. METHODS: A series of 106 patients with mental and behavioral disabilities who underwent dental extractions under general anesthesia were randomly assigned to a control group or chlorhexidine group. The exclusion criteria applied were use of antibiotics in the previous 3 months, use of oral antiseptics, any type of congenital or acquired immunodeficiency, and disease that predisposes the patient to infections or bleeding. The chlorhexidine group had 0.2% chlorhexidine mouthwash administered for 30 seconds before any dental manipulation. Blood samples were collected at baseline, 30 seconds, 15 minutes, and 1 hour after the dental extractions. Subculture and further identification of the isolated bacteria were performed by conventional microbiological techniques. RESULTS: The prevalence of bacteremia after dental extraction in the control and chlorhexidine groups were 96% and 79%, respectively, at 30 seconds (P=.008), 64% and 30% at 15 minutes (P<.001), and 20% and 2% at 1 hour (P=.005). The most frequently identified bacteria were Streptococcus species in both the control and chlorhexidine groups (64% and 68%, respectively), particularly viridans group streptococci. CONCLUSION: We recommend the routine use of a 0.2% chlorhexidine mouthwash before dental extractions to reduce the risk of postextraction bacteremia.
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