The measurement of toothbrush wear.

Henry R Rawls, N. J. Mkwayi-Tulloch, R. Casella, R. Cosgrove

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Toothbrushes wear out and progressively lose their ability to clean as the bristles abrade and become curled and matted. To study the factors that influence this process, we developed a quantitative measure of bristle splaying (wear index) and a method for judging and ranking the overall state of brush deterioration (wear rating) and used these to determine the effects of the individual user, brush design, time in use, and bristle material. Wear index is the average increase in brush-head dimensions normalized for maximum bristle length, and is dimensionless. Wear rating is a subjective means of classifying the increasing severity of deterioration on a scale of 0 to 3. The wear characteristics of a variety of commercial and experimental brushes with different design features were determined. Test variables were time in use, brush design (e.g., geometry and size of the brush head), and bristle composition. Time of use, the individual user, and bristle composition were found to have the strongest influences on splaying, and brush design was found to have the least influence. The wear index offers a quantitative means of comparing brushes of different dimensions at various stages of splaying. The wear rating, although qualitative, is a quick means of ranking brushes in various stages of deterioration. The two methods correlate (R2 = 0.87), and both are sensitive to several factors that affect brush durability. Therefore, these methods appear to be suitable not only for research, but also for quality control, the setting of standards, and for substantiation of advertising claims.

Original languageEnglish (US)
Pages (from-to)1781-1785
Number of pages5
JournalJournal of Dental Research
Volume68
Issue number12
StatePublished - Dec 1989
Externally publishedYes

Fingerprint

Head
Quality Control
Research

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Rawls, H. R., Mkwayi-Tulloch, N. J., Casella, R., & Cosgrove, R. (1989). The measurement of toothbrush wear. Journal of Dental Research, 68(12), 1781-1785.

The measurement of toothbrush wear. / Rawls, Henry R; Mkwayi-Tulloch, N. J.; Casella, R.; Cosgrove, R.

In: Journal of Dental Research, Vol. 68, No. 12, 12.1989, p. 1781-1785.

Research output: Contribution to journalArticle

Rawls, HR, Mkwayi-Tulloch, NJ, Casella, R & Cosgrove, R 1989, 'The measurement of toothbrush wear.', Journal of Dental Research, vol. 68, no. 12, pp. 1781-1785.
Rawls HR, Mkwayi-Tulloch NJ, Casella R, Cosgrove R. The measurement of toothbrush wear. Journal of Dental Research. 1989 Dec;68(12):1781-1785.
Rawls, Henry R ; Mkwayi-Tulloch, N. J. ; Casella, R. ; Cosgrove, R. / The measurement of toothbrush wear. In: Journal of Dental Research. 1989 ; Vol. 68, No. 12. pp. 1781-1785.
@article{dbc957c7fd98404c8662072b2de5f4fb,
title = "The measurement of toothbrush wear.",
abstract = "Toothbrushes wear out and progressively lose their ability to clean as the bristles abrade and become curled and matted. To study the factors that influence this process, we developed a quantitative measure of bristle splaying (wear index) and a method for judging and ranking the overall state of brush deterioration (wear rating) and used these to determine the effects of the individual user, brush design, time in use, and bristle material. Wear index is the average increase in brush-head dimensions normalized for maximum bristle length, and is dimensionless. Wear rating is a subjective means of classifying the increasing severity of deterioration on a scale of 0 to 3. The wear characteristics of a variety of commercial and experimental brushes with different design features were determined. Test variables were time in use, brush design (e.g., geometry and size of the brush head), and bristle composition. Time of use, the individual user, and bristle composition were found to have the strongest influences on splaying, and brush design was found to have the least influence. The wear index offers a quantitative means of comparing brushes of different dimensions at various stages of splaying. The wear rating, although qualitative, is a quick means of ranking brushes in various stages of deterioration. The two methods correlate (R2 = 0.87), and both are sensitive to several factors that affect brush durability. Therefore, these methods appear to be suitable not only for research, but also for quality control, the setting of standards, and for substantiation of advertising claims.",
author = "Rawls, {Henry R} and Mkwayi-Tulloch, {N. J.} and R. Casella and R. Cosgrove",
year = "1989",
month = "12",
language = "English (US)",
volume = "68",
pages = "1781--1785",
journal = "Journal of Dental Research",
issn = "0022-0345",
publisher = "SAGE Publications Inc.",
number = "12",

}

TY - JOUR

T1 - The measurement of toothbrush wear.

AU - Rawls, Henry R

AU - Mkwayi-Tulloch, N. J.

AU - Casella, R.

AU - Cosgrove, R.

PY - 1989/12

Y1 - 1989/12

N2 - Toothbrushes wear out and progressively lose their ability to clean as the bristles abrade and become curled and matted. To study the factors that influence this process, we developed a quantitative measure of bristle splaying (wear index) and a method for judging and ranking the overall state of brush deterioration (wear rating) and used these to determine the effects of the individual user, brush design, time in use, and bristle material. Wear index is the average increase in brush-head dimensions normalized for maximum bristle length, and is dimensionless. Wear rating is a subjective means of classifying the increasing severity of deterioration on a scale of 0 to 3. The wear characteristics of a variety of commercial and experimental brushes with different design features were determined. Test variables were time in use, brush design (e.g., geometry and size of the brush head), and bristle composition. Time of use, the individual user, and bristle composition were found to have the strongest influences on splaying, and brush design was found to have the least influence. The wear index offers a quantitative means of comparing brushes of different dimensions at various stages of splaying. The wear rating, although qualitative, is a quick means of ranking brushes in various stages of deterioration. The two methods correlate (R2 = 0.87), and both are sensitive to several factors that affect brush durability. Therefore, these methods appear to be suitable not only for research, but also for quality control, the setting of standards, and for substantiation of advertising claims.

AB - Toothbrushes wear out and progressively lose their ability to clean as the bristles abrade and become curled and matted. To study the factors that influence this process, we developed a quantitative measure of bristle splaying (wear index) and a method for judging and ranking the overall state of brush deterioration (wear rating) and used these to determine the effects of the individual user, brush design, time in use, and bristle material. Wear index is the average increase in brush-head dimensions normalized for maximum bristle length, and is dimensionless. Wear rating is a subjective means of classifying the increasing severity of deterioration on a scale of 0 to 3. The wear characteristics of a variety of commercial and experimental brushes with different design features were determined. Test variables were time in use, brush design (e.g., geometry and size of the brush head), and bristle composition. Time of use, the individual user, and bristle composition were found to have the strongest influences on splaying, and brush design was found to have the least influence. The wear index offers a quantitative means of comparing brushes of different dimensions at various stages of splaying. The wear rating, although qualitative, is a quick means of ranking brushes in various stages of deterioration. The two methods correlate (R2 = 0.87), and both are sensitive to several factors that affect brush durability. Therefore, these methods appear to be suitable not only for research, but also for quality control, the setting of standards, and for substantiation of advertising claims.

UR - http://www.scopus.com/inward/record.url?scp=0024846946&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024846946&partnerID=8YFLogxK

M3 - Article

C2 - 2600261

AN - SCOPUS:0024846946

VL - 68

SP - 1781

EP - 1785

JO - Journal of Dental Research

JF - Journal of Dental Research

SN - 0022-0345

IS - 12

ER -