[Cervical wedge-shaped lacunae and dentin hypersensitivity--a histological and SEM study].
The purpose of this study was to establish a correlation between dentinal hypersensitivity and tissular modifications of the pulp-dentinal complex at the level of cervical abrasions. 65 freshly extracted human teeth (from patients aged 20 to 80 years) presenting cervical abrasions without carious lesions were prepared in order to be examined histologically (31 teeth) and by scanning electron microscopy (34 teeth). Open tubules were present on the abraded surfaces in 83.3% of the specimens with presence of cytoplasmic processes in 78.46% of the cases without any correlation with tooth age and depth of the abrasions. The sensitivity could be partially explained by the persistence of cervical dentinal permeability. This permeable dentin seems to be susceptible to mechanical, chemical and bacterial irritations, no matter how thick the reactional dentin is. In the absence of any reliable and biological product capable to seal efficiently the open tubules, only nonabrasive hygiene methods can preserve the integrity of cervical dental tissues.
Département de Prévention et Thérapeutique, Université de Genève, Faculté de Medecine.
D
D
Zurcher
J
J
Holz
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003804:Dentin / Q000473:pathology*; D003806:Dentin Permeability; D003807:Dentin Sensitivity / Q000209:etiology / Q000473:pathology*; D006652:Histological Techniques; D006801:Humans; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008875:Middle Aged; D013499:Surface Properties; D014072:Tooth Abrasion / Q000209:etiology / Q000473:pathology
Lacunes cunéiformes cervicales et hypersensibilité dentinaire--étude histologique et au MEB.