Archives of oral biology
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Archives of oral biology · Jan 1989
Haemoglobin concentration and oxygen saturation in dog gingiva with experimentally induced periodontitis.
The index of haemoglobin concentration (Hb index) and apparent oxygen saturation (apparent SO2) were determined by a new, non-invasive method, tissue reflectance spectrophotometry. The Hb index was positively correlated with the haemoglobin concentration. The relationship between the apparent SO2 and oxygen partial pressure was a sigmoid curve resembling the haemoglobin oxygen dissociation curve. ⋯ The apparent SO2 decreased during the first 7 days but gradually rose during the final 9 weeks. The maximum level of the deoxyhaemoglobin concentration after ligation was elevated about two times over that found before ligation, whereas the increase in oxyhaemoglobin concentration was relatively small. These results suggest that the oxygen supply to inflamed gingiva may increase to some extent, but not sufficiently to compensate for the increased oxygen consumption.