| 2825 Quantitative Assay of Initial Demineralization at Different Sites on First Permanent Molars of Children in China | ||
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S.-M. LI1, J. ZOU1, and Z.-Y. WANG2, 1West China University of Medical Sciences, Chengdu, China, 2The University of North Carolina at Chapel Hill, USA Early detection of incipient pit and fissure lesions is critical for caries prevention in children. Objectives: 1) To quantitatively evaluate the demineralization of the caries-vulnerable sites of first permanent molars, and identify the most caries-susceptible site. 2) To compare the demineralization of the first permanent molars between the caries-active children and caries-free children. Methods: Eight hundred 6 to 7 year old children with fully eruption of bilateral maxillary and mandibular first permanent molars were evaluated for inclusion. Subjects having dental fluorosis, incomplete eruption, tetracycline stain, hypoplasia, fracture lines, cavitated lesions and restorations were excluded. Ultimately, one hundred and sixty nine children were included in the study, in which 84 children were caries-free and 85 children were caries-active. Demineralization of central fossa (Cf), lingual pit (Lp) of the bilateral maxillary first permanent molars, and Cf and buccal pit (Bp) of the bilateral mandibular first permanent molars were evaluated by laser fluorescence systerm KaVo DIAGNOdent (Germany). Data were processed by software STATA 5.0. Grouped t-test and single factor variance analysis and paired comparison were applied. Results: Cf of mandibular first permanent molar had significantly higher demineralization than other sites of first permanent molars (P<0.01). The demineralization of the maxillary Cf was more severe than that of Lp (P<0.05). There was no significant difference of demineralization between the same sites bilaterally (P>0.05), or between different genders (P>0.1). In addition, the extent of the initial demineralization of each site of the first permanent molar in caries-active children was significantly higher than that of the caries-free children (P<0.001). Conclusions: Central fossa of first mandibular molar is the most important site for targeted prevention in 6-7 year old children. Special concern to pits and fissures of first molars should be given to caries-active population. KaVo DIAGNOdent can be used for early incipient pit and fissure caries detection and monitoring in children. | ||
| Seq #259 - Demineralization, Remineralization 3:45 PM-5:00 PM, Friday, 8 March 2002 San Diego Convention Center Exhibit Hall C | ||
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