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Effect of irradiation with 4.4 J of HeNe laser light on the viability of P. gingivalis and S. sanguis (in a suspension containing both organisms) when in the presence of 4 μg of either unconjugated TBO or Ab-TBO/ml. L−S−, cells were not sensitized or exposed to laser light; L+S+, cells were sensitized and exposed to laser light.
