[The role of mechanical factors in the development of cervical wedge-shaped erosions].
The surface of single or multiple cervical wedge-shaped defects was studied with a scanning electron microscope. After an initial stage during which the root surface became smooth and polished, the developed lesions had an angular shape with the presence of one or several grooves of 0.2 to 0.3 mm in width at the angle vertex. The presence of these grooves forming horizontal gutters strongly suggested the existence of a horizontal brushing movement. Beside these large grooves, a more or less parallel network of fine striae was observed. The lesion surfaces consisted of dentin with obliquely oriented tubules which were not completely sclerosed. Relatively thin bacterial layers were present on these surfaces. The presence of horizontal wear gutters seemed to confirm the traumatic origin of the wedge-shaped defects connected with toothbrushing.
R M
RM
Frank
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R
Haag
J
J
Hemmerle
D000328:Adult; D001641:Bicuspid / Q000382:microbiology / Q000648:ultrastructure; D003481:Cuspid / Q000382:microbiology / Q000648:ultrastructure; D006801:Humans; D007180:Incisor / Q000382:microbiology / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D013499:Surface Properties; D014077:Tooth Erosion / Q000209:etiology* / Q000382:microbiology / Q000473:pathology; D014099:Toothbrushing / Q000009:adverse effects
Rôle des facteurs mécaniques dans le développement des lacunes cunéiformes cervicales.