Dental caries and its association with diet and dental erosion in Libyan schoolchildren.

Background. 
The change towards a more Westernised diet in Libya may increase the risk of caries and erosion in children.

Aims. 
To investigate any association between dental caries, dental erosion, and potential dietary risk factors in Libyan schoolchildren.

Methods. 
A random sample of 791 schoolchildren aged 12 years underwent dental examination for caries and erosion and completed a questionnaire to provide dietary data. Dental caries was assessed using the WHO (Oral Health Surveys: Basic Methods, 1997) criteria. Erosion was assessed using UK National Diet and Nutrition Survey (NDNS, Young People Aged 4-18 years. Volume 2: Report of the Oral Health Survey, 2000) criteria. Associations between caries and dietary variables were investigated through bivariate and multivariate analyses.

Results. 
Of the 791 12-year olds, 57.8% (457) had caries experience and 40.8% (323) had experience of erosion. One hundred and ninety-two subjects (42%) of the subjects with caries experience also had erosion, whilst 131 subjects (39.2%) of the 334 without caries had clinical signs of erosion (P = 0.464; OR, 1.123; 95% CI, 0.842, 1.497). There was no statistically significantly relationship between dental caries and dental erosion. Frequency of consumption of fruit-based sugared drinks was statistically significantly positively associated with experience of caries (P = 0.002).

Conclusions. 
Dental caries experience was associated with frequency of consumption of sugared dietary items but not with dental erosion.