Polymer-Based Toothpastes and Their Ability in Control Tooth Extrinsic Stain

Area of Science:

• Dental materials science
• Polymer chemistry
• Surface science

Background:

• Tooth extrinsic stains are a common aesthetic concern.
• Toothpastes commonly contain abrasives to remove stains.
• Polymers can enhance the efficacy of toothpastes in stain management.

Purpose of the Study:

• To synthesize and evaluate experimental toothpastes (ETs) containing four different polymers for their efficacy in preventing and removing extrinsic tooth stains.
• To compare the anti-stain performance of ETs with a regular toothpaste (RT) and a control.

Main Methods:

• Four ETs were formulated with sodium linear polyphosphate (LPP), chitosan (CHI), sodium hexametaphosphate (HMP), or sodium pyrophosphate (PP).
• Tooth specimens underwent a cyclic staining and cleaning protocol involving chlorhexidine, staining broth, artificial saliva, and brushing.
• Color change parameters (ΔEab, ΔE00, ΔWID, ΔL, Δa, Δb) were measured at baseline and after 21 cycles.

Main Results:

• ET containing 5% sodium pyrophosphate (PP) showed significantly lower ΔEab and ΔE00 values compared to the control and RT (p < 0.01).
• The PP-containing ET exhibited a higher ΔWID, indicating greater whitening effect.
• No significant differences in ΔL and Δb were observed among groups, but a significant difference in Δa was noted for ET 5% PP versus the control (p = 0.01).

Conclusions:

• Experimental toothpastes demonstrated varying effects on extrinsic stain prevention and removal.
• Toothpaste containing sodium pyrophosphate (5% PP) showed superior performance in reducing extrinsic tooth stains compared to regular toothpaste and brushing alone.
• The findings suggest that incorporating specific polymers, like sodium pyrophosphate, can enhance the stain-control capabilities of toothpastes.