Effect of the Water Pik device on plaque accumulation and development of gingivitis.

The influence of the water irrigating device, Water Pik, on the accumulation of plaque and development of gingivitis has been studied using the model, "experimental gingivitis in man". The investigation was carried out on 41 patient volunteers whose teeth were thoroughly scaled and polished during a 4-week period of intensive oral hygiene preceding each experimental period. Gingival exudation, Plaque Index and Gingival Index were registered at the beginning of the experimental periods. The participants were then divided into four groups. Groups A and B abandoned all forms of active oral hygiene. Group A, however, were given Water Pik devices as the only oral hygiene aid. Groups C and D continued to clean their teeth using a toothbrush and Group C were given Water Pik devices as a supplementary aid. After 14 days, gingival exudation, Plaque Index, Gingival Index and soft tissue injuries were registered. The results showed that , while both groups A and B demonstrated extensive plaque deposits and gingivitis, these were present to a significantly lesser degree in Water Pik users. The toothbrushing groups (C and D) failed to demonstrate any further reduction of plaque or gingivitis when Water Pik was introduced as an additional measure. No soft tissue injuries were found.