Effects on plaque and gingivitis of a chlorhexidine dental gel in the mentally retarded

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Abstract
The effectiveness of a 1% chlorhexidine-containing dental gel on dental plaque and gingival health was evaluated over a period of 6 mo. using a double-blind procedure. Mentally retarded subjects (117), aged between 10-17 yr, resident in an institution were divided into 2 groups. One group was assigned daily brushing with the 1% chlorhexidine gel, the other group a placebo quinine sulfate-containing gel. No other form of oral hygiene was used during the experimental period. Assessment of dental plaque accumulation and gingivitis was made at 0, 1, 3 and 6 mo. An assessment was also made 2 mo. after the gel was withdrawn from use and normal toothbrushing procedures resumed. No clinical or statistical advantage was noted in plaque or gingivitis scores in the group receiving chlorhexidine treatment during the 6 mo. period. This group showed a higher prevalence of tooth staining. Periodontal severity and poor oral hygiene exceeded the plaque- and gingivitis-preventing potential of chlorhexidine.