[Effects of nicotinate ethyl ester treatment on gingival blood circulation of experimental gingivitis in monkeys].

The effects of nicotinate ethyl ester treatment on the gingival blood circulation of plaque induced inflammation in monkeys were determined. The blood flow, amount of hemoglobin and oxyhemoglobin rate (oxyhemoglobin/total hemoglobin) in gingival blood circulation in addition to bacterial colony forming units (CFU), gingival index (GI), probing depth (PD), loss of attachment (LA) and amount of gingival crevicular fluid (GCF) were used as parameters. Besides 1% nicotinate ethyl ester paste (nicotinate paste), 0.5% chlorhexidine (CHX) paste as an antibacterial agent, a mixture of the two pastes and the base alone as a control were used. 1. The blood flow, amount of hemoglobin, CFU, GCF, PD and GI increased as inflammation developed, and these showed significant correlations. 2. The oxyhemoglobin rate showed no corresponding change with inflammation. 3. Nicotinate paste, CHX paste and the mixed paste seemed to reduce the inflammation of the gingiva as assessed by the blood flow, hemoglobin amount, CFU and GCF amount compared with the control paste.