Evaluation of Toothbrush Wear on Toothbrushing Efficiency


Aim of the study: is to assess the influence of toothbrush wear on plaque index (PI) and gingival (GI)
index. Materials and Methods: twenty dental students participated, before the beginning of the study,
all the students received a prophylactic scaling and polishing by the operator, the PI and GI were recorded
at the starting point T0, each student received an identical toothbrush and toothpaste and were
instructed to brush twice daily, after one month at T1, the students were randomly divided in to two
groups, group no. 1 used the same brush provided at T1, while group no. 2 substituted the toothbrush at
each monthly examination. Recalls were scheduled after one (T1), two (T2) and three months (T3), the
plaque and (PI) gingival index (GI) of Loe and Sillness, in addition to Rawls et al index of wear for
toothbrush were measured at each monthly examination. Results: showed that from T0 to T3 that the
PI and GI were increasing with statistically significant difference in between each group. In comparing
between the two groups PI showed a significant difference at T2 and T3, and although mean values of
GI in group not changing toothbrushes were slightly higher, significant difference was observed at T3
only. The WI had a statistically significant difference as toothbrush bristles deteriorated, and there was
a positive relationship between the PI and WI in the group of students that did not change their
toothbrush because as the toothbrush bristles splayed and deteriorated, the plaque values increased.
Conclusion: it can be therefore concluded from the results obtained in this study, that the capacity to
remove dental plaque is much related to toothbrush wear.