Laboratory Evaluation of Interdental Brushes

OBJECTIVE

The primary objective of this study was to compare the stain removing ability of nylon interdental brushes containing aluminum oxide (alumina) - STAINO® brushes - to standard nylon interproximal brushes without alumina.

The secondary objective of this study was to evaluate the effect of the STAINO® interdental brushes containing alumina on natural tooth enamel: the degree of scratching (if any) as compared to standard nylon interdental brushes.

RESULTS
A. Stain Removal

Visual examination revealed that the STAINO® brush removes coffee and tea stains at a rate about double that of the control brush. For example, the amount of stain removal achieved by the STAINO® brush at 100 strokes was about the same as the standard brush at 200 strokes. This result was consistent for all the stained teeth evaluated. Photographs (Figures 2a, 2b and 2c) showing the results of a tea stain are typical of the findings for all the teeth tested.

Baseline
Figure 2a
100 Brush Strokes
Figure 2b
200 Brush Strokes
Figure 2c
B. Scratching of Tooth Surface by the Brushes

There is no evidence of scratching produced by the STAINO® brush or the standard brush after 200 brush strokes when observed using a stereomicroscope at 10x and 25x magnification.

SEM evaluation at 1000x magnification revealed small scratches on the surface of the natural tooth enamel resulting from the alumina containing brush. These scratches were approximately the same size as those produced using a fine abrasive prophylaxis paste (See Figure 3b).

Neither the STAINO® brush nor the standard brush produced scratches on tooth enamel that were visible with the unaided eye or at 25x using the stereomicroscope.

CONCLUSIONS

There is an observable difference between a the new STAINO® interdental brush and a standard control nylon interdental brush in the ability for stain removal from extracted natural teeth. The rate of stain removal of the STAINO® brush is approximately twice that of the standard nylon brush.

The new STAINO® brush produced small scratches on the surface of the natural tooth enamel. These scratches were approximately the same size as those produced using a fine abrasive prophylaxis paste. Neither the STAINO® brush nor the standard brush produced scratches on tooth enamel that were visible with the unaided eye or at 25x using the stereomicroscope.