The effect of perinatal TCDD exposure on caries susceptibility in rats.

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), the model compound of polychlorinated dibenzo-p-dioxins and furans, is a potent toxicant with the ability to hamper development. Accidental exposure to TCDD has been linked with various developmental dental aberrations in humans, and experimentally it has been shown that TCDD causes, among other defects, hypomineralization of dental hard tissues in rodents. Here, we studied the effect of very low perinatal TCDD exposure on dental caries susceptibility and mineral composition of tooth enamel in rats.

Dental erosion in deciduous teeth--an in vivo and in vitro study.

Objective: The aims of this study were to report on severe dental erosion and its associated etiological factors in deciduous teeth of Saudi children (n=16, X macro=6.5 years, R=5--8) in vivo, and to confirm (or reject) the clinical diagnosis by scanning electron microscopy (SEM). Another aim was to study progression of erosion in vitro using extracted healthy deciduous and permanent teeth.

Hospital mouth-cleaning aids may cause dental erosion.

Maintaining satisfactory oral health in bed-ridden patients often calls for special aids, such as moistened cotton swabs. The purpose of this in vitro study was to investigate three commercially available swabsticks meant for hospital use (Dentiswab, Lemon-Glycerin Swabsticks, and Lemon Glycerine Swabs), and one saliva-stimulant chewing tablet (Cassisal), regarding their possible erosive effects on dental enamel. A bovine enamel model system was used.

Surface ultrastructure of rat molar teeth after experimentally induced erosion and attrition.

Young Osborne-Mendel rats were given different diets for 6 weeks. Effects of soft and rough food as well as acidic sport drink on the lingual surfaces of first mandibular molars were studied. In addition, the effect of fluoride on erosion was examined.

Efficacy of chlorhexidine solution with fluoride varnishing in preventing enamel softening by Streptococcus mutans in an artificial mouth.

For study of the enamel-protective effect of chlorhexidine-fluoride applications, the labial surfaces of pieces of bovine incisors were treated with 0.2% chlorhexidine gluconate solution, with Duraphat fluoride varnish, or with both of the above agents, while one group was treated with distilled water and one was left as an untreated control. Furthermore, a placebo varnish was used in the chlorhexidine- and distilled-water-treated groups; all the varnishes were removed after 24 h.