In vitro reproduction of noncarious cervical lesions.
BACKGROUND
A review of the dental literature indicates that noncarious cervical lesions (NCCLs) are formed by erosion, abrasion, and/or abfraction of tooth structure, but their etiology remains scientifically unsubstantiated.


OBJECTIVE
The purpose of this study was to reproduce noncarious cervical lesions in vitro. This study was not designed to statistically quantify the amount of lost tooth structure via abrasion, but rather to attempt to create NCCLs in the various shapes and sizes that are clinically observed.


METHODS
Three pairs of toothbrush types (generic and name-brand) with soft, medium, or firm bristles were tested with 3 different toothpastes of varying abrasive potentials (low, medium, and high) or with water only, on mounted human teeth with and without simulated gingival tissues (6 toothbrushes x 4 brushing solutions (L, M, H, dentifrices, or water only) x 2 gingival mask conditions = 48 test/control groups of 4 teeth each = 192).


RESULTS
The control sets, brushed in water only, demonstrated no visible loss of tooth structure. Each set brushed with toothpaste, regardless of the degree of abrasiveness or toothbrush bristle firmness, demonstrated visible wear at the level of the CEJ.


CONCLUSIONS
Significant noncarious cervical lesions were created via horizontal brushing with common commercial toothpaste, while brushing with water only did not create these cervical lesions.
Dzakovich
John J
JJ
Private practice, Arlington Heights, IL, USA. drrro1@sbcglobal.net
Oslak
Robert R
RR
D011756:Diphosphates / Q000009:adverse effects; D004338:Drug Combinations; D005459:Fluorides / Q000009:adverse effects; D006801:Humans; D006861:Hydrogen Peroxide; D009566:Nitrates / Q000009:adverse effects; D010710:Phosphates / Q000009:adverse effects; D017693:Sodium Bicarbonate / Q000009:adverse effects; D012969:Sodium Fluoride / Q000009:adverse effects; D014072:Tooth Abrasion / Q000209:etiology*; D019237:Tooth Cervix / Q000473:pathology*; D014099:Toothbrushing / Q000009:adverse effects* / Q000379:methods; D014100:Toothpastes / Q000009:adverse effects*; D014993:Xylitol / Q000009:adverse effects
C115762:Crest Multicare; D011756:Diphosphates; D004338:Drug Combinations; D009566:Nitrates; D010710:Phosphates; C097427:Sensodyne; D014100:Toothpastes; C546054:sodium bicarbonate-based toothpaste; D017693:Sodium Bicarbonate; D012969:Sodium Fluoride; D006861:Hydrogen Peroxide; D005459:Fluorides; D014993:Xylitol