A simplified quantitative test—adapted Checkbuf test—for resting saliva buffering capacity compared with a standard test

ObjectiveThe aim of this study was to adapt a quantitative test for stimulated saliva, known as the Checkbuf test, to measure the buffering capacity of resting saliva and to evaluate its correlation with the Ericsson test for resting saliva.Study designResting saliva was collected from 112 patients. Buffering capacity was assessed with the adapted Checkbuf test and 4 other methods: Ericsson test for resting saliva, Checkbuf test, and commercially available paper and liquid colorimetric tests for stimulated saliva. Data were analyzed by Cohen kappa coefficient to evaluate the agreement between the Ericsson test and the other tests.ResultsThere was a significant positive agreement between the Ericsson test for resting saliva and adapted Checkbuf test (κ = 0.708). However, there were no agreements between the Ericsson test and the 3 other tests.ConclusionsThis study demonstrated that the adapted Checkbuf test is useful for measuring resting saliva buffering capacity, even for subjects with low salivary flow rates.