Effects of occlusal load on cervical lesions

summary Toothbrush abrasion has been considered to cause cervical lesions. However, some investigators have proposed that occlusal loading factors direct tensile stresses at the cervical area, resulting in wedge‐shaped abfraction defects. The purpose of this study is to investigate the role of axia...

Celý popis

Uloženo v:

Podrobná bibliografie
Vydáno v:	Journal of oral rehabilitation Ročník 31; číslo 3; s. 225 - 232
Hlavní autoři:	Litonjua, L. A., Bush, P. J., Andreana, S., Tobias, T. S., Cohen, R. E.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Oxford, UK Blackwell Science Ltd 01.03.2004
Témata:	abfraction Bicuspid - pathology cemento-enamel junction Dental Enamel - pathology Dental Occlusion Dental Stress Analysis - instrumentation Dental Stress Analysis - methods Dentin - pathology Humans Microscopy, Electron, Scanning occlusion Stress, Mechanical tooth abrasion Tooth Abrasion - etiology Tooth Abrasion - pathology Tooth Cervix - pathology toothbrushing Toothbrushing - methods
ISSN:	0305-182X, 1365-2842
On-line přístup:	Získat plný text
Tagy:	Přidat tag Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!

Popis
Shrnutí:	summary Toothbrush abrasion has been considered to cause cervical lesions. However, some investigators have proposed that occlusal loading factors direct tensile stresses at the cervical area, resulting in wedge‐shaped abfraction defects. The purpose of this study is to investigate the role of axial and non‐axial load on the development of cervical lesions. Matched paired premolars, extracted for orthodontic purposes, were used in a custom‐fabricated toothbrushing apparatus. A periodontal sulcus width of 0ḃ1 mm with 1 mm gingival recession was simulated with denture base resin. In phase 1, eight matched premolar pairs were subjected to 80 h (1ḃ4 million strokes) of brushing and 300 g of toothbrush force. Toothpaste slurry was applied continuously through the toothbrush. One specimen in each pair was subjected to 250 h and 45 kg of continuous axial load, while the other unloaded tooth served as a negative control. In phase 2, 10 matched premolar pairs were subjected to the same conditions; however, the experimental teeth were subjected to 250 h and 45 kg of intermittent non‐axial load, directed at a 45° angle to the buccal cusp. Rubber impressions were made of the cervical lesions, then trimmed, weighed, and compared to determine the amount of tooth material lost. When teeth were loaded axially, there was significantly less tooth material loss (P < 0ḃ02); however, when teeth were loaded non‐axially, there was no significant difference (P =0ḃ80) when compared with controls. Optical and scanning electron microscopy did not reveal any significant differences in the morphology between pairs. Our data suggest that the application of occlusal load may not necessarily play a significant role in the progression of cervical tooth wear commonly referred to as abfraction.
Bibliografie:	ark:/67375/WNG-974BCVD3-J ArticleID:JOOR1226 istex:C3788592CA2E61030B0B1965989ED35B83ACC119 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Undefined-3
ISSN:	0305-182X 1365-2842
DOI:	10.1046/j.0305-182X.2003.01226.x