Objective: In an initial study subjects complaining of bad breath were gene
rally unable to score the level of their own oral malodor in an objective f
ashion. Subjects were taught several techniques for self-measurement of bad
breath. One year following the initial consultation, subjects were recalle
d to determine whether their ability to assess their own oral malodor had i
mproved. Method and materials: In the study, subjects were blinded to their
own scores 1 year earlier, to the odor-judge scores, and to the results of
the clinical laboratory tests. Thirty-two of 43 subjects in the original s
tudy who presented with a complaint of oral malodor agreed to participate i
n the follow-up study, Odor-judge scores and self-assessments of oral malod
or (whole-mouth odor, tongue odor, and saliva odor) were compared with one
another as well as with clinical parameters, Results: Objective improvement
s were noted in both oral health parameters and malodor levels of subjects.
Despite this, self-assessments generally remained unrelated to objective p
arameters (odor-judge scores, clinical indices, and laboratory tests). Self
-assessments were all significantly correlated with one another, and also w
ere significantly associated with corresponding self-estimates made 1 year
earlier. Conclusion: Subjects with a complaint of oral malodor remain large
ly unable to score their own bad breath in an objective fashion. In additio
n, they are not capable of sensing reductions in oral malodor 1 year follow
ing the original assessment, even though, from a clinical standpoint, impro
vements have taken place.